Article
Electrochemistry
Sanghyeon Moon, Santosh S. Patil, Sangwoo Yu, Wonjoo Lee, Kiyoung Lee
Summary: The feasibility of electrochemical detection of 2,4,6-trinitrotoluene (2,4,6-TNT) using TiO2 nanotubes synthesized through electrochemical anodization of Ti was explored. The study found that the anodic TiO2 nanotubes exhibited good electrochemical sensing properties and could distinguish different compounds based on reduction peaks. Further research is suggested to enhance the efficacy of TiO2 nanotube arrays for the electrochemical reduction of explosive compounds by introducing metal dopants, quantum dots, or vacancy engineering.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Nhat Huy Luan, Chiung-Fen Chang
Summary: An independent TiO2 nanotube layer was prepared through a three-step process that showed a complete structure and mechanical hardness to resist detachment, demonstrating excellent potential for future applications.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Multidisciplinary
Muhammad Bilal Hanif, Guru Karthikeyan Thirunavukkarasu, Viktoriia Liapun, Hryhorii Makarov, Maros Gregor, Tomas Roch, Tomas Plecenik, Karol Hensel, Marcel Sihor, Olivier Monfort, Martin Motola
Summary: This study presents an environmentally friendly synthesis of TiO2 nanotube (TNT) layers and demonstrates their photocatalytic performance and HO radical production rate. The best preparation condition was using AgNO3 as the electrolyte, which resulted in TNT layers with suitable morphological features and crystal structure.
Article
Chemistry, Multidisciplinary
Suriyakumar Dasarathan, Mukarram Ali, Tai-Jong Jung, Junghwan Sung, Yoon-Cheol Ha, Jun-Woo Park, Doohun Kim
Summary: Vertically aligned Fe, S, and Fe-S doped anatase TiO2 nanotube arrays were successfully prepared by electrochemical anodization, with doping leading to enhanced rate performance and improved discharge capacities. The addition of Fe-S resulted in remarkable discharge capacities at high discharge rates, showcasing exceptional capacity retention after multiple cycles.
Review
Chemistry, Physical
JeongEun Yoo, Kiyoung Lee
Summary: The self-organized TiO2 nanotubes can be formed by electrochemical anodization, but traditional electrolytes limit their electrical properties and applications. This review introduces a new anodization approach using carbon-free electrolyte in ortho-phosphoric acid, which allows the formation of highly ordered TiO2 nanotube arrays. Further modifications, such as heat-treatment, noble metal deposition, thermal dewetting, and double anodization, are discussed to enhance the optical and electrical properties for various applications.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Junling Qin, Zhiguang Cao, Hui Li, Zixue Su
Summary: TiO2 nanotubes with a diameter down to around 6 nm were successfully fabricated in ammonium fluoride-containing ethylene glycol electrolyte through a one-step anodic oxidation method. By systematically studying the influences of various factors, the growth mechanism of TiO2 nanotubes with ultra-small pore diameter and cell size was revealed.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Wangzhu Cao, Kunfeng Chen, Dongfeng Xue
Summary: In this study, vertically oriented TiO2 nanotube arrays were successfully grown using self-organizing electrochemical anodization, with different parameters affecting their morphology studied. Optimized TiO2 nanotubes with tube diameters of 70-160 nm and tube lengths of 6.5-45 µm were obtained. As lithium-ion battery anodes, they exhibited good kinetic, capacity, and stability performances.
Article
Environmental Sciences
Sonal Rajoria, Manish Vashishtha, Vikas K. Sangal
Summary: A GO/TiO2 electrode was prepared by depositing graphene oxide (GO) on a titania plate through a simple anodization method. The morphology and structure of the TiO2 and GO/TiO2 electrodes were characterized using various techniques. The results showed that GO nanoparticles were successfully formed on the TiO2 substrate, with a thickness of approximately 300 nm. The synthesized GO/TiO2 nanotube electrode exhibited a bandgap of 3.052 eV. The effect of pH, current, and degradation time on the COD degradation and energy consumed was investigated using response surface methodology. At optimized parameters, a COD degradation of 57.61% and energy consumption of 15.00 kWh/m(3) were achieved. The electroplating effluents degradation mechanism was found to involve center dot OH radicals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Electrochemistry
Fang Wei, Zhenhui Chen, Yue Lin, Qun Qian, Hongyi Jiang, Penghao Su, Dexiang Liao, Daolun Feng
Summary: The study found that using high-frequency cyclic anodization for TNT fabrication can result in longer, larger, and more regular tubes, although the walls of the tubes become thinner. Additionally, higher duty cycles during fabrication improve the photocatalytic degradation performance of TNTs.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Materials Science, Coatings & Films
Ika Maria Ulfah, Diah Ayu Fitriani, Siti Amalina Azahra, Aghni Ulma Saudi, Muhammad Kozin, Razie Hanafi, Prabowo Puranto, Bambang Sugeng, Yudi Nugraha Thaha, Aga Ridhova, Muhammad Prisla Kamil
Summary: Titanium dioxide nanotubes (TNTs) grown on the surface of titanium implants play a significant role in preventing tissue infection and implant failure. This study investigates the role of different counter electrodes in the formation of TNTs with varying shapes and surface properties. The use of platinum and graphite cathodes results in circular TNTs, while stainless steel cathode leads to hexagonal-shaped tubes with particle debris on the surface. The surface microstructure of TNTs affects their roughness, hydrophilicity, and ability to facilitate the growth of bone-forming apatite during osseointegration.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Alberto Z. Fatichi, Mariana G. de Mello, Karina D. Pereira, Luisa G. M. Antonio, Augusto D. Luchessi, Rubens Caram, Alessandra Cremasco
Summary: The electrochemical, structural, and biological properties of self-organized amorphous and anatase/rutile titanium dioxide (TiO2) nanotubes deposited on Ti-35Nb-4Zr alloy through anodization-induced surface modification were investigated. The study found that anatase TiO2 exhibited higher surface corrosion resistance and cell viability compared to amorphous TiO2, indicating the importance of TiO2 nanotube crystallization in the material's electrochemical behavior and biocompatibility.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Meilan Pan, Shuang-yin Tang-hu, Chenhao Ni, Haihua Chen, Bingjun Pan
Summary: Fluorine-containing fluoroquinolones, as cumulative toxins, pose a serious threat to the health of animals and humans. This study focuses on the electrochemical degradation and defluorination of levofloxacin (LVF) using Ti(III)-laden TiO2 nanotube arrays (RTNA). The results show that LVF degradation kinetics on RTNA is significantly improved compared to TiO2 nanotube arrays (TNA) due to the presence of Ti(III) and oxygen vacancies. The role of sulfate in electrolyte is found to be crucial for the defluorination efficiency, where sulfate radicals (SO4-center dot) play a dominant role in breaking the C-F bond of LVF.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Nurhaswani Alias, Navid Mirzakhani, Mustaffa Ali Azhar Taib, Syafinaz Ridzuan, Wai Kian Tan, Go Kawamura, Atsunori Matsuda, Zainovia Lockman
Summary: Free-standing anodic TiO2 films consisting of vertically oriented nanotubes can be produced by anodizing titanium in ethylene glycol with the addition of Na2CO3. Annealing in different atmospheres and temperatures can affect the crystallinity and photocatalytic activity of the TiO2 films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Peng Li, Shuxin Dai, Dan Dai, Zhiming Zou, Renda Wang, Ping Zhu, Kun Liang, Fangfang Ge, Feng Huang
Summary: Diverse microstructures of Ti films were created via magnetron sputtering under controllable parameters, followed by anodization in an ethylene glycol-based electrolyte. The relationship between the micro-structures of Ti films and the resulting TiO2 layers was analyzed, with film density identified as the key microstructure affecting the formation of TiO2 nanotube arrays (TNTs). The electron aggregation theory explained why denser Ti films facilitate TNTs formation, and confirmatory experiments were performed to validate this theory.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Mana Iwai, Tatsuya Kikuchi, Ryosuke O. Suzuki
Summary: The use of Na2B4O7 as an alkaline electrolyte allows for the fabrication of high-aspect ratio, self-ordered nanospike porous AAO structures with a wide range of interpore distances. Pre-nanotexturing of Al enables the production of highly ordered porous AAO structures with unique nanospikes on the vertical pore walls.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Environmental
Suh-Ciuan Lim, Chao -Lung Chiang, Chun-Kuo Peng, Wen-Bin Wu, Yu-Chang Lin, Yu-Ru Lin, Chi-Liang Chen, Yan-Gu Lin
Summary: In this study, a highly active, durable, and cost-efficient bifunctional catalyst Co@CoMoOx-alpha-CrOOH was synthesized for electrochemical water splitting. The catalyst showed remarkable catalytic activity and stability, making it a sustainable strategy for water-splitting applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Bo-Yan Chen, Galina Dobele, Ance Plavniece, Aleksandrs Volperts, Loreta Tamasauskaite-Tamasiunaite, Eugenijus Norkus, Chi-Liang Chen, Yu-Chuan Lin
Summary: K-doped FeCx catalysts derived from the carbothermal reduction of the Fe-chitosan complex were investigated for the hydrogenation of CO2 to light olefins. Catalyst characterization and performance evaluation revealed a correlation between the physicochemical properties of the catalysts and their catalytic activities. Mechanistic studies identified various carbonate and formate species as intermediates involved in C2-6= synthesis. The most active catalyst, FeK@CS-(0.5)-py, exhibited the highest space-time yield of C-2-6(-) (13.7 mu mol(C2-6=)/g(Fe)/s).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Yuanjie Zheng, Peng Wang, Wei-Hsiang Huang, Chi-Liang Chen, Yanyan Jia, Sheng Dai, Tan Li, Yun Zhao, Yongcai Qiu, Geoffrey I. N. Waterhouse, Guangxu Chen
Summary: Electrochemical production of H2O2 is an eco-friendly and cost-effective method. Metal-doped carbon-based catalysts are commonly used for 2e-ORR due to their high selectivity. The role of metals and carbon defects in H2O2 production is still unclear. This study obtained a Co-N/O-C catalyst with a Faradaic efficiency greater than 90% in alkaline electrolyte by varying the Co loading in the pyrolysis precursor. Detailed studies revealed that carbon atoms in C-O-C groups at defect sites were the active sites for 2e-ORR in the Co-N/O-C catalysts. The direct contribution of cobalt single atom sites and metallic Co for the 2e-ORR performance was negligible, but Co played an important role in the pyrolytic synthesis of the catalyst.
Article
Instruments & Instrumentation
Eli Diego Kinigstein, Christopher Otolski, Guy Jennings, Gilles Doumy, Donald A. Walko, Xiaobing Zuo, Jinghua Guo, Anne Marie March, Xiaoyi Zhang
Summary: Laser pump X-ray Transient Absorption (XTA) spectroscopy has been enhanced with two new XTA data acquisition techniques: HRR-XMP and AXMP. HRR-XMP utilizes high repetition rate laser to increase data collection efficiency at each time delay. AXMP uses a frequency mismatch between laser and x-ray pulses to acquire XTA data at flexible pump-probe time delays. Both techniques have been successfully demonstrated in measuring laser-induced spectral dynamics of aqueous solutions of Fe(CN)(6)(4-) and [Fe-II(bpy)(3)](2+).
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Chemistry, Multidisciplinary
Chih-Hao Hsu, Wei-Hsiang Huang, Chin-Jung Lin, Chun-Hao Huang, Yi-Che Chen, Krishna Kumar, Yan-Gu Lin, Chung-Li Dong, Maw-Kuen Wu, Bing Joe Hwang, Wei-Nien Su, Shih-Yun Chen, Chi-Liang Chen
Summary: Carbon@titania yolk-shell nanostructures are successfully synthesized and used as a photocatalyst to degrade acetaminophen. The presence of residual carbon nanospheres is found to improve the photocatalytic efficiency. X-ray absorption spectroscopy analysis reveals the structural and electronic changes in the hollow shell. In situ XAS measurements show that the existence of amorphous carbon nanospheres inhibits the recombination of electron-hole pairs, leading to enhanced photodegradation of acetaminophen. Charge transfer from TiO2 to carbon nanospheres reduces electron-hole recombination and increases photocatalytic efficiency.
Article
Chemistry, Multidisciplinary
Harini Gunda, Keith G. Ray, Leonard E. Klebanoff, Chaochao Dun, Maxwell A. T. Marple, Sichi Li, Peter Sharma, Raymond W. Friddle, Joshua D. Sugar, Jonathan L. Snider, Robert D. Horton, Brendan C. Davis, Jeffery M. Chames, Yi-Sheng Liu, Jinghua Guo, Harris E. Mason, Jeffrey J. Urban, Brandon C. Wood, Mark D. Allendorf, Kabeer Jasuja, Vitalie Stavila
Summary: Metal boride nanostructures have great potential for hydrogen storage applications. However, their synthesis is challenging due to high surface energy, strong bonding, and difficult surface termination. Mechanochemical exfoliation of magnesium diboride in zirconia produces ultrathin MgB2 nanosheets with high yield. High-pressure hydrogenation and dehydrogenation of these nanosheets reveal a hydrogen capacity 50 times larger than bulk MgB2. The enhancement is attributed to defective sites created by ball-milling and incomplete Mg surface coverage. The exfoliation and creation of ultrathin layers offer a promising direction for high-capacity hydrogen storage.
Article
Computer Science, Information Systems
Jingyao Wang, Jinghua Guo, Yugong Luo, Keqiang Li, Huaqing Zheng
Summary: Due to environmental and physical factors, the C-V2X wireless communication network connection is prone to intermittent interruptions. This can lead to deterioration in the performance of vehicle platooning, as the vehicles are unable to receive necessary information. To address this issue, a robust control method based on the intermittent information connection of the leading vehicle through the C-V2X communication network is proposed. The designed platoon control strategy, based on the mode-dependent average dwell time method, improves conservatism and flexibility compared to the average dwell time method. The method is also applicable to various communication topologies, and its effectiveness is verified through simulation.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yingmin Wang, Wantong Zhao, Jianbing Qiang, Shao-Bo Mi, Chi-Liang Chen, Wei-Hsiang Huang, Chung-Kai Chang, Yu-Chun Chuang, Yong-Mook Kang, Fazhu Ding, Jiliang Zhang
Summary: Anode materials of metal oxides based on conversion reaction in lithium-ion batteries usually have a higher capacity than commercial graphite anodes, and the porous forms of the materials can effectively reduce the volume change during (de)lithiation. This study focuses on tetragonal gamma-Fe2O3 as a representative intrinsic nano-porous metal oxide anode material. The structural evolution of gamma-Fe2O3 not only contributes to the understanding of conversion reactions of vacancy-ordered metal oxides, but also provides a new method for the fabrication of twinning structures in metal oxides, including cathode materials.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yizhe Liu, Xintong Li, Shoufeng Zhang, Zilong Wang, Qi Wang, Yonghe He, Wei-Hsiang Huang, Qidi Sun, Xiaoyan Zhong, Jue Hu, Xuyun Guo, Qing Lin, Zhuo Li, Ye Zhu, Chu-Chen Chueh, Chi-Liang Chen, Zhengtao Xu, Zonglong Zhu
Summary: A molecularly engineered MOF system based on mercaptan-metal links has been designed, demonstrating excellent electroconductivity and efficient electrocatalytic oxygen evolution reaction (OER) performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu-Cheng Huang, Yanrui Li, K. Thanigai Arul, Takuji Ohigashi, Ta Thi Thuy Nga, Ying-Rui Lu, Chi-Liang Chen, Jeng-Lung Chen, Shaohua Shen, Way-Faung Pong, Chung-Li Dong, Wu-Ching Chou
Summary: This study demonstrates that the introduction of a single nickel atom into g-C3N4 can significantly enhance the efficiency of photocatalytic water splitting into hydrogen and hydrogen peroxide, without the need for additional cocatalysts. The improved performance is attributed to the adjustment of atomic and electronic structures of g-C3N4 by a new hybrid orbital, which enhances visible light absorption and promotes the separation and transfer of photogenerated charge carriers. This study provides a promising material design for promoting photocatalytic activity in solar energy conversion applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Chusnul Khotimah, Fu-Ming Wang, Margret Wohlfahrt-Mehrens, Jeng-Kuei Chang, Jeng-Yu Lin, Chia-Chin Chang, Rio Akbar Yuwono, Sylvia Ayu Pradanawati, Nan-Hung Yeh, Chun-Chuan Hsu, Pei-Wan Lester Tiong, Jeng-Lung Chen, Shu-Chih Haw, Chih-Wen Pao, Chi-Liang Chen, Jyh-Fu Lee, Ting-Shan Chan, Hwo-Shuenn Sheu, Jin-Ming Chen, Alagar Ramar
Summary: This study investigates the effects of different morphologies of LNMO primary particles on the electrochemical performance. Rectangular-shaped LNMO with higher surface energy exhibits stable electrochemical reaction and excellent performance, while pentahedron-shaped LNMO with lower surface energy causes gas evolution and loss in cycle retention. The addition of a lithium salt additive can regulate the valence states of Ni and Mn ions, leading to improved electrochemical performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
K. Trangwachirachai, A. -l. Huang, H. -K. Chen, C. -L. Chen, J. -F. Lee, H. -K. Tian, Y. -C. Lin
Summary: The reduction of GaN using different carriers was investigated and tested for methane conversion to acetonitrile. The highest ammonia and ACN productivities were obtained using 5 wt% GaN on HZ. The N-Ga interaction was weakened due to the presence of a neighboring Bronsted acid, and rejuvenation of activity could be achieved through a renitridation step. The (001) side surface of GaN was found to be important in the conversion of methane to ACN.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Philosophy
Jinghua Guo
Summary: The International Council on Monuments and Sites (ICOMOS) believes that heritage, both natural and cultural, plays a fundamental role in achieving the United Nations Sustainable Development Goals (SDGs). This paper examines the Liangzhu cultural heritage in Hangzhou, China, arguing that cultural heritage is a unique form of living narrative. It emphasizes the importance of cultural heritage narratives in global sustainable development, highlighting examples such as the cross-media development of the Liangzhu site and the integration of 5G technology in Hangzhou as a model for sustainable urban development.
CULTURA-INTERNATIONAL JOURNAL OF PHILOSOPHY OF CULTURE AND AXIOLOGY
(2023)
Article
Chemistry, Physical
Jing-Hua Guo, Hong-Bo Wang, Hai-Ying Liu, Gang Chen, Ting-Ting Cao
Summary: In this study, theoretical models were constructed by incorporating Fe-TCPP and Fe-(mIM)(n) (n = 2,3,4) active sites into hole-graphene and their structural stability was assessed through molecular dynamics simulations. The oxygen reduction reaction (ORR) mechanism and the effects of spatial confinement and ligands were systematically investigated using DFT calculations. The analysis revealed that Fe-TCPP and Fe-(mIM)(4) exhibit good catalytic activity. Additionally, the introduction of confinement effect (5-14 angstrom) demonstrated its influence on catalytic activity, with the lowest overpotential observed at an axial space of 8 angstrom for Fe-TCPP and 9 angstrom for Fe-(mIM)(4). Four ligands (bpy, pya, CH3, and bIm) were selected to explore their impact on the catalytic activity of Fe-TCPP, and modifications with bpy, pya, and bIm_N resulted in a decrease of 26-31% in overpotential. The best catalytic system identified in this work was Fe-TCPP_pya, which occupied the top position in the volcano plot.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Leah R. Filardi, Feipeng Yang, Jinghua Guo, Coleman X. Kronawitter, Ron C. Runnebaum
Summary: Carbon dioxide-assisted coupling of methane can chemically upgrade greenhouse gases and natural gas components to produce ethylene and syngas. The study focuses on the characterization of bifunctional oxide systems to understand the active sites and their roles in the reaction. The introduction of Ca onto a ZnO surface improves the catalytic production of C-2 species.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)