Review
Engineering, Environmental
Pei Chang, Yuhua Wang, Yitong Wang, Yangyang Zhu
Summary: This paper reviews indium oxide-based photocatalytic systems, analyzes the charge transfer mechanisms in different heterostructures, compares the characteristics of different photocatalytic systems, and discusses the limitations of indium oxide-based materials in photocatalytic applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Chrysanthi Patriarchea, Ioannis Vamvasakis, Eirini D. Koutsouroubi, Gerasimos S. Armatas
Summary: Modulating heterojunction interfaces at the nanoscale is crucial for developing efficient photocatalysts. The mesoporous heterojunction architectures made of MoS2 nanolayers and CdS nanocrystals showed high efficiency in solar energy to chemical fuel conversion, with a remarkable enhancement in photocatalytic hydrogen production activity. The optimized MoS2/CdS catalyst achieved a H2 production rate of up to 0.4 mmol h(-1) with 51.2% apparent quantum yield, demonstrating a 6.7x enhancement in H2 generation efficiency compared to unmodified CdS.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Green & Sustainable Science & Technology
D. Panchal, A. Sharma, S. Pal
Summary: Two-dimensional MoS2 has great potential as a photocatalytic material for water treatment, but its pristine nanostructure has limitations due to high recombination rate. This review summarizes the strategies used to improve the photocatalytic performance of MoS2, including scaling down to few/mono nanosheets, constructing heterojunctions with other materials, and defect engineering. The review also discusses the misinterpretation of charge transfer in heterojunctions and the generation of reactive species. Furthermore, recent progress in MoS2-based photocatalytic systems for environmental remediation is discussed, along with future research directions for designing superior photocatalysts.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Engineering, Electrical & Electronic
Yongji Huang, Xuqiang Zhang, Junling Zeng
Summary: A facile and novel Pt-BiOCl/rGO hybrid photocatalyst was reported with excellent catalytic performance for dye degradation, showing promising application prospects for water purification. The special ternary structure of the catalyst is believed to attribute to the high efficiency in photocatalysis and solar energy conversion.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Lingzhi Huang, Jinyu Bao, Wei Quan, Xueyang Li, Tingting Zhao, Yunqi Ning, Wenting Lu, Kehong Liu, Fengyao Ren, Hongwei Tian
Summary: A Z-scheme LaFeO3/MoS2/graphene photocatalyst was synthesized and tested for the degradation of dye wastewater. The photocatalyst showed high efficiency and stable performance, attributed to the synergistic effect between LaFeO3 and MoS2/graphene co-catalyst and the optimized Z-scheme heterojunction interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Sina Moradi, Ali Akbar Isari, Farzan Hayati, Roshanak Rezaei Kalantary, Babak Kakavandi
Summary: An efficient all-solid-state Z-type photocatalyst TGCN was successfully fabricated by introducing graphene as shuttle electron mediator to TiO2 and g-C3N4 composites, significantly enhancing degradation performance and photo-activity. The adsorption edge of TGCN was extended to the visible-light region by g-C3N4 nanosheets, benefiting a more favorable band gap position. Graphene was found to facilitate photo-induced electron transportation and separation, while also improving specific surface area and promoting ACM adsorption capacity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Zhao Liu, Bartosz Szczefanowicz, J. Marcelo J. Lopes, Ziyang Gan, Antony George, Andrey Turchanin, Roland Bennewitz
Summary: Stacked hetero-structures of 2D materials design interactions with electronic and mechanical properties. We investigate the structure, work function, and friction of 1-4 layers MoS2 grown by chemical vapor deposition on epitaxial graphene on SiC(0001). Friction is mainly controlled by adhesion, which is influenced by deformation of layers. Friction decreases with increasing layers due to decreased deformation caused by bending rigidity. Friction dependence on load and bias voltage is due to variations in interface atomic potential corrugation, enhanced by load and bias. Minimal friction is achieved when work function differences are compensated.
Article
Chemistry, Physical
Xiaolin Yang, Wen Wang
Summary: The article theoretically investigates the friction characteristics in graphene/MoS2 layered heterojunction using molecular dynamics (MD) method. It is found that the friction force is greatly affected by the twist angle and whether the graphene slider experiences in-plane vibrational motion depends on the initial configuration and twist angle. The study also reveals that different edge atoms and internal atoms have different contributions to friction.
Article
Materials Science, Multidisciplinary
Peipei Huo, Peng Zhao, Xiaobo Shi, Ziyan Zhou, Bo Liu
Summary: A novel structure of GQDs-decorated TiO(2) nanofibers was successfully prepared in this study, showing improved photocatalytic performance. Introduction of GQDs inhibits adverse recombination of charges and enhances photocatalytic degradation activity.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Long-Gui Peng, Hui Wang, Jun Liu, Meng Sun, Fu-Rong Ni, Meng-Jie Chang, Hui-Ling Du, Jie Yang
Summary: A novel fibrous BiVO4/Bi2S3/MoS2 heterojunction was fabricated using electrospinning and hydrothermal processes. The heterojunction exhibited enhanced visible light absorption and photocurrent, showing potential for applications in energy storage and conversion with high photocatalytic activity.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Physical
Xiaowen Ruan, Depeng Meng, Chengxiang Huang, Minghua Xu, Xin Wen, Kaikai Ba, David J. Singh, Haiyan Zhang, Lei Zhang, Tengfeng Xie, Wei Zhang, Weitao Zheng, Sai Kishore Ravi, Xiaoqiang Cui
Summary: Photocatalytic water splitting using MXene cocatalyst and interface engineering shows exceptional performance in hydrogen evolution, due to widened light absorption and efficient carrier transportation. The novel ternary heterogeneous photocatalyst, a-TiO2/H-TiO2/Ti3C2 MXene (MXTi), achieved a high rate of 0.387 mmol h(-1). These findings pave the way for more sustainable and efficient hydrogen production.
Article
Biochemistry & Molecular Biology
Farid Orudzhev, Arsen Muslimov, Daud Selimov, Rashid R. Gulakhmedov, Alexander Lavrikov, Vladimir Kanevsky, Rashid Gasimov, Valeriya Krasnova, Dinara Sobola
Summary: This paper reports on the high photocatalytic activity of ZnO tetrapods (ZnO-Ts) under visible/solar light and hydrodynamic water flow. It was demonstrated that surface oxygen defects play a crucial role in the photocatalytic activity of ZnO-Ts. The ability to control the surface wettability and surface defect concentration of ZnO-Ts was also shown. Additionally, the similar photocatalytic activity of ZnO-Ts under direct and simulated sunlight offers great potential for solar photocatalysis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Gang-Juan Lee, Yu-Hong Hou, Chin-Yi Chen, Chien-Yie Tsay, Yu-Cheng Chang, Jing-Heng Chen, Tzyy-Leng Horng, Sambandam Anandan, Jerry J. Wu
Summary: The MoS2/graphene hybrid (MSG) was synthesized using microwave hydrothermal method, showing enhanced photocatalytic nature with decreased charge transfer resistance and increased photocurrent in graphene modified MoS2. The appropriate modification of graphene can lead to maximum yield of hydrogen gas in photocatalytic hydrogen evolution process. The study also found that using optimal conditions, such as specific concentrations of formic acid and graphene, can achieve outstanding photocatalytic hydrogen evolution with maximum yield of hydrogen gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Zhanying Ma, Xiaobo Li, Guang Fan, Lingjuan Deng, Yangqing He
Summary: In this study, MoS2 nanosheets were prepared and deposited on BiOBr microflowers using a deposition-hydrothermal strategy. The MoS2/BiOBr composites exhibited a micro-flower morphology with improved visible-light harvesting performance in the 400-600 nm range. The obtained MoS2/BiOBr samples showed significantly enhanced catalytic activity, degrading 92.96% of tetracycline and 90.31% of levofloxacin in 70 minutes. The improved photocatalytic performance could be attributed to the synergistic effect of strong visible-light harvesting ability, enhanced BET surface area, and faster separation or transfer efficiency of photo-generated charges, as supported by DRS, BET, PL, and electrochemical analysis.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Lijun Yang, Jing Wang, Tianyi Ma, Lei Zhang
Summary: Designing a core-shell nanointerface is beneficial for enhancing the photocatalytic performance of hydrogen peroxide (H2O2) production. A one-dimensional (1D) CuBiOS@CuBi2O4 nanorods with a core-shell nanostructure and O-S interpenetrated nanointerface was synthesized through in-situ anion exchange. The O-S interpenetration at the heterogeneous interface with surface oxygen vacancies effectively improved light absorption, reduced interface contact resistance, facilitated band bending, and enhanced charge separation and transfer as a bridge. The catalyst with tunable O-S nanointerface exhibited significantly improved photocatalytic performances in H2O2 production.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Fengda Wan, Xinguo Ma, Jiajun Liao, Xue Gong, Hui Lv, Shuiquan Deng, Xiaobo Chen
Summary: Enhancing the band alignment sensitivity of MoS2-based optoelectronic devices by constructing a semiconductor heterojunction is a significant challenge. In this study, Cu2O was incorporated into MoS2 for the first time to enhance the tunability of electronic structures. The Cu2O/MoS2 heterojunction showed a more sensitive variation in bandgap with the increase of E-field compared to pure MoS2. Additionally, the detection wavelength of the heterojunction expanded from the visible to the infrared spectrum with E-field.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Li Fang, Yun Ni, Jisong Hu, Zhengfu Tong, Xinguo Ma, Hui Lv, Shaocong Hou
Summary: In this study, the electronic properties of a van der Waals heterostructure composed of MoSi2N4 and BlueP monolayers were systematically investigated using first-principles calculations. Results showed a type-II band alignment in the heterostructure and its electronic properties could be modulated by applying an external electric field or a biaxial strain.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Hongyu Lu, Jisong Hu, Yan Zhang, Kaiqi Zhang, Xiaoying Yan, Heqi Li, Jianzhu Li, Yujie Li, Jingxin Zhao, Bingang Xu
Summary: In this research, a novel 3D cold-trap environment printing (3DCEP) technology is proposed to fabricate the MXene and Zn-P (3DCEP-MXene/Zn-P) anode with highly ordered arrangement. The 3DCEP-MXene/Zn-P anode demonstrates improved cycling lifespan and coulombic efficiency due to the unique inhibition mechanism and physical confinement effects within the anode. Furthermore, when paired with MXene and Co doped MnHCF cathode via 3DCEP, the full battery shows high cyclic durability with a capacity retention of 95.7% after 1600 cycles.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ming Li, Xuanpeng Wang, Jisong Hu, Jiexin Zhu, Chaojiang Niu, Huazhang Zhang, Cong Li, Buke Wu, Chunhua Han, Liqiang Mai
Summary: A novel strategy was reported to break the hydrogen bond network between water molecules and construct the Zn(TFSI)(2)-sulfolane-H2O deep eutectic solvents. This strategy effectively cuts off the transfer of protons/hydroxides and inhibit the activity of H2O, resulting in improved stability and performance of aqueous Zn metal batteries.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zhengwang Cheng, Aobo Wang, Huating Bo, Mei Wang, Jing He, Wei Zou, Xinguo Ma
Summary: This study prepared molybdenum (Mo) films on CMOS compatible Si/SiO2 wafers through a magnetron sputtering method and systematically investigated the effect of several process parameters on film thickness nonuniformity and other structural properties. The optimized process parameters resulted in films with unified <110> preferred orientation, excellent thickness nonuniformity of 0.46%, surface roughness of 0.83 nm, and low X-ray diffraction (110) rocking curve of 0.47 degrees. These results provide an efficient reference for the preparation of uniform metal films and improving the quality and yield in filter device manufacturing.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Qiang Hu, Jisong Hu, Lei Li, Qiwen Ran, Yuyao Ji, Xingquan Liu, Jingxin Zhao, Bingang Xu
Summary: The addition of additives such as hexanehexol (Hex) can enhance the reversibility of Zn-metal aqueous batteries by regulating the solvation shell and electrode interface. Experimental results show that Hex, with 6 hydroxyls, is the most effective additive as it forms more hydrogen bonds with active H2O molecules and achieves stronger adsorption energy with Zn metal. This hydroxyl chemistry strategy can be applied to screening other electrolyte additives, indicating its practical universality.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Xinguo Ma, Huatin Bo, Xue Gong, Gang Yuan, Zhuo Peng, Jingjing Lu, Qihai Xie
Summary: Improving the electric transport of heterostructure-based field-effect transistors is a challenge due to the reduction of the interfacial barrier. The electronic properties of WSi2N4/graphene heterostructure with different interface distance or external electric field are studied using the first-principles approach. It is found that a stable vdW heterostructure can be formed between WSi2N4 and graphene, and the energy band structures of the heterostructure can be modulated by both interface distance and external electric field.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Huan He, Fu-Chun Pan, Xue-Wei Liang, Qiang Hub, Shude Liu, Jisong Hue, Seong Chan Jun, Dunmin Lin, Yusuke Yamauchi, Yu Huo
Summary: This study develops a cathode material called NVO with controllable structural water for zinc-ion storage, which improves ion transport and enables fast storage. The NVO-2.6 cathode exhibits high structural stability and multi-electron redox ability, leading to high performance in terms of specific capacity and long-term cyclability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Mei Wang, Huating Bo, Aobo Wang, Zhengwang Cheng, Shengjia Li, Wei Zou, Jing He, Xinguo Ma
Summary: To adapt to the upgrading of wireless communication system, research on thin film bulk acoustic resonator (FBAR) has gained attention. This study focuses on the core functional layer, the piezoelectric film, particularly aluminum nitride (AlN) and scandium-doped AlN films, examining their characteristics and quality changes. The results show that doping with scandium significantly improves the uniformity, roughness, and stress of AlN films, making it promising for improving the performance of FBAR filters and device yield.
Article
Multidisciplinary Sciences
Hongyu Lu, Jisong Hu, Xijun Wei, Kaiqi Zhang, Xiao Xiao, Jingxin Zhao, Qiang Hu, Jing Yu, Guangmin Zhou, Bingang Xu
Summary: This paper presents the development of a biomass-based hydrogel electrolyte that can effectively inhibit side reactions on the zinc anode and be easily retrieved from zinc batteries.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xiaoqiang Wu, Xinguo Ma, Gang Yuan, Nan Ma, Ruoyue Fan, Chuyun Huang
Summary: This study investigates the adsorption properties of a novel Janus B2P6 nanosheet with NO and NO2 using DFT calculation. The results show that Janus B2P6 exhibits better sensitivity to NO2 and has good recovery time and stable signal transmission. Under biaxial strain, it also promotes the desorption of gas molecules.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Engineering, Electrical & Electronic
Gang Yuan, Zhengwang Cheng, Yuehuan Cheng, Wangyang Duan, Hui Lv, Zhifeng Liu, Changcun Han, Xinguo Ma
Summary: The influence of interlayer spacing and external electric field on the GR/MoSi2N4 heterojunction was systematically investigated. The study found that both the type and height of the Schottky barrier can be tuned by altering the interlayer spacing or applying external electric field. These findings are of great importance for the design of next-generation field-effect transistors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Gang Yuan, Zhengwang Cheng, Yuehuan Cheng, Wangyang Duan, Hui Lv, Zhifeng Liu, Changcun Han, Xinguo Ma
Summary: This study systematically investigates the influence of the combination of graphene and monolayer MoSi2N4 on the interfacial characteristic and electronic structure, and finds that the type and height of the Schottky barrier can be tuned by altering the interlayer spacing or applying an external electric field.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yixin Weng, Xinguo Ma, Gang Yuan, Hui Lv, Zhongyong Yuan
Summary: This study investigates the adsorption behavior and sensing performance of a novel Janus MoSiGeN4 nanosheet for NO and NO2 gas molecules. The results show slight charge transfer between the gas molecules and the nanosheet, and the generation of small band gaps and impurity levels in the electronic structures after gas adsorption, enhancing the electronic conductivity.
Article
Chemistry, Multidisciplinary
Mingyang Long, Di Li, Hongmiao Li, Xinguo Ma, Qianqian Zhao, Qi Wen, Fang Song
Summary: Nanosized MFe2O4 photocatalysts synthesized by a sol-gel method were used to activate peroxymonosulfate and enhance the degradation of levofloxacin hydrochloride under visible light irradiation. The influences of various parameters on peroxymonosulfate activation and degradation efficiency were investigated. The mechanism of peroxymonosulfate activation by MFe2O4 was proposed and validated.
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)
