Article
Chemistry, Physical
Na Zhang, Enqi Liu, Hongwei Chen, Jinhui Hou, Chao Li, Hongri Wan
Summary: LaCoO3/Co3O4-800 composites exhibit excellent lithium storage performance, with high reversible capacity and superior cycling stability, making them potential candidates for LIBs anodes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Zheng Liu, Mengkang Yu, Xiaodan Wang, Fengyu Lai, Chao Wang, Nan Yu, Hongxia Sun, Baoyou Geng
Summary: The hollow sandwich-like TiO2@Co3O4@Co3O4/C composite, synthesized by coating Co3O4 nanosheets and TiO2 particles on Co3O4/C hollow spheres, exhibits excellent lithium storage performance and stability due to its superior structure that combines the advantages of each component with favorable electron-transfer and Li+-diffusion properties.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Xiaoyi Hou, Geng Zhou, Dengdeng Ai, Ruheng Xi, Yongxiang Yuan, Jianglong Kang, Hao Chen, Jianmin Tian, Jiatai Wang
Summary: A hollow multi-shelled spherical Co3O4/CNTs composite was prepared by introducing carbon nanotubes (CNTs) directly into the precursor using a facile MOF-assisted strategy. The hierarchical porous structure of the obtained multi-shelled Co3O4 nanospheres effectively alleviates volume change and facilitates electrolyte infiltration. The interconnected CNTs reduce electrochemical polarization and improve conductivity of the material. As an anode for lithium-ion batteries, the synthesized Co3O4/CNTs composite exhibits superior lithium-ion storage performance, with a high reversible specific capacity of 653.1 mAh g-1 after 500 cycles at 1000 mA g-1, providing significant inspiration for fabricating advanced electrochemical devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yishan Wang, Xueqian Zhang, Fanpeng Meng, Guangwu Wen
Summary: The study introduced a hierarchical Co3O4 nanorods/N-doped graphene material for lithium-ion batteries, which exhibited high specific capacities, indicating potential for the design and synthesis of similar electrode materials.
FRONTIERS OF MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Fenghao Liang, Daoning Wu, Lei Jiang, Zhe Zhang, Wei Zhang, Yichuan Rui, Bohejin Tang, Fengjiao Liu
Summary: This study synthesized niobium oxide hydrate by a facile and inexpensive method, and applied it as an anode material in lithium-ion batteries, demonstrating excellent electrochemical performance and expanding the variety of high-performance anode materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Hechun Wei, Wei Huang, Ketong Luo, Yanqun Huang, Shengkui Zhong, Dongliang Yan
Summary: Hollow Ni0.75Zn0.25Fe2O4 nanospheres with PVP-assisted hydrothermal strategy were successfully fabricated and displayed good dispersibility and high specific surface area. The nanospheres also demonstrated satisfactory cycle life and rate performance as a lithium ion battery negative electrode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Lixin Zhang, Qianwen Xu, Hongfang Jiu, Wei Song, Jiaxuan Yang, Xin Li, Hao Wei, Congli Wang, Xuefan Li, Jiahui Zhao
Summary: In this study, g-C3N4-derived CN coating wrapped concave hollow ZnO@C dodecahedrons were synthesized and used as anode materials for lithium-ion batteries. The designed structure and coating improved the conductivity, cycle stability, and lithium storage capacity of the batteries. The results demonstrate the potential of this design concept for other lithium storage materials and nitrogen doping regulation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Anubha Tomar, Egy Adhitama, Martin Winter, Tobias Placke, Alok Kumar Rai
Summary: In this study, a mesoporous NiCo2O4/Co3O4 nanocomposite with nanowire morphology was synthesized through a facile and cost-effective hydrothermal approach using polyvinyl pyrrolidone as a structure-directing agent. The obtained nanocomposite exhibited better electrochemical performance than pure NiCo2O4 due to the synergistic effect between NiCo2O4 and Co3O4, which enhanced Li+ diffusion rate and reduced charge-transfer resistance, as well as the high electrochemical activity of Co3O4 contributing to the total capacity. However, the performance of the nanocomposite electrode degraded after 400 cycles, indicating that the nanowire morphology could not tolerate volume variations induced by long-term cycling of Li+ (de-)insertion. These findings suggest the existence of an optimal balance between Li+ diffusion and high porosity when utilizing Co3O4 in a nanocomposite, providing guidance for research on ternary transition metal oxide nanocomposite materials for lithium-ion batteries.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Physical
Heguang Liu, Ruixuan Jing, Zhanglin Zhu, Xintong Lv, Li Lei, Na Tian, Caiyin You
Summary: In this study, a MWCNTs/Co3O4/carbon foam composite was designed and fabricated to address the issues of volume expansion and electrical conductivity in Co3O4 anodes. The results showed that the composite exhibited significantly improved electrochemical performance compared to pristine Co3O4. After 200 cycles, the composite delivered a discharge capacity of 480.4 mAhg � 1 at 0.5 Ag-1, which was much higher than the pristine Co3O4 (53.9 mAhg � 1). Moreover, the composite also demonstrated good rate capability and cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Biao Wang, Yilun Ren, Yuelei Zhu, Shaowei Chen, Shaozhong Chang, Xiaoya Zhoua, Peng Wanga, Hao Sun, Xiangkang Menga, Shaochun Tanga
Summary: An advanced N-doped carbon microreactor embedded with Co3O4/ZnO heterojunctions is designed as a dual-functional host for optimizing both S cathode and Li metal anode, resulting in excellent cycling stability and high rate capability of Li-S batteries.
Article
Chemistry, Inorganic & Nuclear
Shengqiang Zhang, Jie Dang, Chengxin Liu, Tiantian Ren, Xiaojie Liu
Summary: A freestanding membrane with a unique bean pod-like structure composed of nitrogen-doped carbon fibers and hollow carbon spheres encapsulated with SnCo nanoparticles was synthesized. The Sn acts as a host for Na+ storage, while the Co serves as an electrochemically inactive matrix that buffers volume variations and inhibits aggregation and particle growth of the Sn phase. The introduction of hollow carbon spheres provides sufficient void space to withstand volume expansion and improves anode conductivity. The freestanding membrane also increases the contact area between the active material and the electrolyte, providing more active sites during cycling. When used as an anode material for Na-ion batteries, the B-SnCo/NCF anode exhibits excellent rate capacity and specific capacity.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Multidisciplinary
Kaixiang Chen, Run Huang, Fengling Gu, Yan Du, Yonghai Song
Summary: Co3O4 nanomaterials and N-doped carbon nanobubble film composites were successfully prepared by using COFs as templates, showing good lithium storage ability and cycle stability. The combination of CNBF and H-Co3O4 provides a new guide for the preparation of novel metal oxides and carbon composites.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Chengyu Zhu, Yanan Zhang, Youwen Ye, Gang Li, Fei Cheng
Summary: Hollow Mn2SiO4 sub-microspheres encapsulated by a highly continuous network of conductive carbon were prepared and showed high capacity and cycling stability. A full cell assembled with the Mn2SiO4@C anode and LiFePO4 cathode exhibited excellent energy and power density.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Xiao Li, Qian Chu, Mingqi Song, Chunhua Chen, Yulin Li, Xiaodong Tian, Yuming Cui, Deyang Zhao
Summary: Porous CoO/Co3O4 nanoribbons were fabricated using a hydrothermal and annealing method. The nanoribbons have self-assembled ultra-thin structure with mesoporous/macroporous characteristics and oxygen vacancy, which contribute to buffering volume change, enlarging contact area, improving cycling life, and enhancing specific capacity. Additionally, the oxygen vacancies and three-dimensional network promote internal conductivity and accelerate the diffusion of electrons/ions, resulting in excellent rate performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Junshan Han, Liqiang Duan, Lingyan He, Xing Li
Summary: The study demonstrated exceptional electrochemical performance of porous Co3O4 nanosheet as an anode for LIBs, synthesized using quantitative filter papers as sacrificial template, which facilitated Li-ion diffusion and electron transport, leading to improved cycling performance.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Article
Optics
Yongjun Meng, Dingxin Huang, Hong Li, Xia Feng, Feng Li, Qianyi Liang, Tianzi Ma, Jiahao Han, Jianwei Tang, Guanying Chen, Xue-Wen Chen
Summary: Stable nanocrystals can be utilized in various fields through plasmonic coupling to achieve high brightness upconversion luminescence, and the saturation of plasmonic enhancement in this phenomenon is demonstrated. Researchers have improved the upconversion luminescence of nanocrystals by optimizing their material properties and surface structures through plasmonic coupling. These findings are of great significance for developing ultrabright upconversion nanomaterials for multiple applications.
Article
Materials Science, Multidisciplinary
Tianyu Zhao, Guanying Chen
Summary: This study introduces a novel Te4+ doped Cs2ZrCl6 microcrystal that exhibits high sensitivity for temperature sensing at low temperatures. The experiments demonstrate significant differences in temperature-dependent emission behaviors between the Cs2ZrCl6 host and the Te4+ luminescent center, leading to the design of a novel fluorescence intensity ratio thermometry. The maximum absolute and relative temperature sensitivity can reach as high as 0.7378 K-1 and 1.966% K-1 at 85 K, respectively.
Article
Chemistry, Multidisciplinary
Chade Lv, Ning Jia, Yumin Qian, Shanpeng Wang, Xuechun Wang, Wei Yu, Chuntai Liu, Hongge Pan, Qiang Zhu, Jianwei Xu, Xutang Tao, Kian Ping Loh, Can Xue, Qingyu Yan
Summary: Metal-free 2D phosphorus-based materials are potentially efficient and stable catalysts for electrochemical nitrogen reduction reaction. A stable phosphorus-based electrocatalyst, silicon phosphide (SiP), is explored and found to have high catalytic activity for NH3 production. Crystalline SiP nanosheets show superior electrocatalytic performance compared to amorphous SiP nanosheets due to their resistance to oxidization. The findings suggest that SiP nanosheets have great potential as electrocatalysts for nitrogen reduction reactions.
Article
Chemistry, Multidisciplinary
Liangcan He, Nannan Zheng, Qinghui Wang, Jiarui Du, Shumin Wang, Zhiyue Cao, Zhantong Wang, Guanying Chen, Jing Mu, Shaoqin Liu, Xiaoyuan Chen
Summary: This study reports a pH-responsive i-motif DNA-mediated method to regulate the programmable behaviors of erbium-based rare-earth nanoparticles (ErNPs) on copper doped metal-organic framework (CPM) nanohybrids, achieving selective tumor accumulation and imaging.
Article
Chemistry, Physical
Yi Kong, Chade Lv, Gang Chen
Summary: Electrocatalytic nitrogen reduction reaction (ENRR) is a potential alternative to the Haber-Bosch approach, and a simple and effective strategy of iron surface implantation is recommended to enhance the NRR activity. The Fe/Cu catalyst achieved a NH3 yield rate of 6.8 +/- 0.4 mg/h/cm and a Faradaic efficiency of 16.0 +/- 1.1% in an alkaline electrolyte. Theoretical calculations showed that iron implantation can improve nitrogen adsorption, weaken the N-N bond, and lower the energy barrier of the potential determining step for promoting the NRR process. This work provides a new route for designing efficient catalysts for ENRR under ambient conditions.《Design of Fe/Cu catalyst and its application in nitrogen reduction reaction》
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Physical
Yaru Shang, Chunliang Wang, Chunshuang Yan, Fengyang Jing, Morteza Roostaeinia, Yu Wang, Gang Chen, Chade Lv
Summary: The study focuses on the design of a multifunctional photocatalyst with strong redox performance, constructed by a S-scheme heterojunction between metal-free g-C3N4 and noble-metal-free W18O49. The designed photocatalyst exhibits outstanding sustainability with hydrogen production, degradation, and bactericidal properties. The integration of hollow g-C3N4 nanotubes and W18O49 nanowires enhances the light harvesting ability, and the S-scheme heterojunction promotes carrier separation and redox ability of the catalyst. This work provides a theoretical basis for improving photocatalytic performance and expanding the application field of photocatalysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Jiarui Du, Tao Jia, Jinghan Zhang, Guanying Chen
Summary: Integrating biocompatible metal-organic frameworks (MOFs) with upconversion nanoparticles (UCNPs) enables the development of unique UCNPs@MOFs heterostructures for nanomedicine. The integration allows for the detection of biomolecules, modulation of intracellular and tumor microenvironments, on-demand release of gas molecules, and tumor microenvironment-responsive multimodal therapy using tissue-penetrating NIR light stimulation. This article provides an overview of recent progress, classification of heterostructures, and the fundamental upconversion FRET mechanism underlying their applications, along with highlighting cutting-edge applications and future perspectives.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Oncology
Haifeng Hao, Xinyu Wang, Yan Qin, Zhifang Ma, Pengyu Yan, Chao Liu, Guanying Chen, Xiaofeng Yang
Summary: This study aimed to evaluate the feasibility of CD47 as a target for optical molecular imaging of human bladder cancer and conducted preliminary ex vivo imaging experiments. The results showed that CD47-targeted NIR molecular imaging can accurately diagnose bladder cancer.
FRONTIERS IN ONCOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Adilet Zhakeyev, Mansour Abdulrhman, Yuqi Zhang, Feng Li, Guanying Chen, Jose Marques-Hueso
Summary: In this work, a technique for multi-material stereolithography is presented, which overcomes the limitation of layer-by-layer deposition. Selective volumetric crosslinking is achieved by using invisibility windows and upconversion, allowing for printing inside and through previously 3D printed parts. This technique opens up numerous possibilities, such as printing objects inside cavities in a different material, restoration of broken objects and artifacts, 3D circuitry, and in-situ bioprinting.
APPLIED MATERIALS TODAY
(2023)
Review
Chemistry, Physical
Bo Han, Jiawei Liu, Carmen Lee, Chade Lv, Qingyu Yan
Summary: This paper provides a comprehensive review on the application and development of metal-organic framework (MOF) catalysts in the electrochemical nitrogen reduction reaction (E-NRR) field. It first introduces the basic principles of E-NRR, including the reaction mechanism, major apparatus components, performance criteria, and ammonia detection protocols. Then, the synthesis and characterization methods for MOFs and their derivatives are discussed. A reaction mechanism study via density functional theory calculations is also presented. Furthermore, the recent advancement of MOF-based catalysts in the E-NRR field, as well as the modification approaches on MOFs for E-NRR optimization, are elaborated. Finally, the current challenges and outlook of MOF catalyst-based E-NRR field are emphasized.
Article
Biochemistry & Molecular Biology
Mingqian Wang, Ming Zheng, Yuchen Sima, Chade Lv, Xin Zhou
Summary: This study constructs surface-frustrated Lewis pairs (SFLPs) structures by doping non-metallic elements on the In2O3 (110) surface, and finds that these structures can serve as efficient electrocatalytic nitrogen reduction catalysts, activating N-2 molecules and suppressing the hydrogen evolution reaction.
Article
Chemistry, Multidisciplinary
Tao Jia, Jiarui Du, Jiani Yang, Feng Li, Xikui Fang, Guanying Chen
Summary: Upconversion photodynamic therapy (PDT) using upconversion nanoparticles (UCNPs) has shown promise for treating deep-seated tumors. However, the lack of oxygen in solid tumors and the inability to visualize reactive oxygen species (ROS) for precise treatment have been major limitations. In this study, a new multifunctional upconversion photosensitizer was developed to efficiently generate hydroxyl radicals (•OH) to induce cell apoptosis in hypoxic tumors and to dynamically visualize the accumulation of •OH in the tumor. The photosensitizer consisted of UCNPs as the core and mesoporous silica as the shell, loaded with heterojunction Ag0-Ag2S quantum dots and IR 820 molecular probe on the surface. This novel photosensitizer demonstrated significant tumor volume reduction and showed the accumulated production of •OH in hypoxic tumors.
Article
Chemistry, Multidisciplinary
Bo Han, Lixiang Zhong, Cailing Chen, Jie Ding, Carmen Lee, Jiawei Liu, Mengxin Chen, Shuen Tso, Yue Hu, Chade Lv, Yu Han, Bin Liu, Qingyu Yan
Summary: Main group element-based materials, specifically aluminum-based defective metal-organic frameworks (MOFs), show promising capabilities as electrocatalysts for sustainable ammonia production via electrochemical nitrogen reduction reaction (N2RR) under ambient conditions. Defective aluminum sites in the aluminum-fumarate (Al-Fum) MOF play a crucial role in promoting N2RR activity. The defective Al-Fum exhibits stable and efficient electrochemical N2RR, with a high production rate of 53.9 μg(NH3) h(-1)mg(cat)(-1) and a Faradaic efficiency of 73.8% under ambient conditions.
Article
Chemistry, Physical
Yaru Shang, Ming Zheng, Hengjie Liu, Xiaoli Jin, Chunshuang Yan, Li Song, Zeming Qi, Fengyang Jing, Pin Song, Xin Zhou, Gang Chen, Chade Lv
Summary: In this study, a boron- and sulfur-doped graphitic carbon nitride catalyst was used to selectively and efficiently synthesize CO from CO2 through a photochemical process. The catalyst showed high selectivity and significantly improved catalytic efficiency compared to bulk graphitic carbon nitride due to the unique mimicking frustrated Lewis pairs configuration.
Review
Chemistry, Physical
Huaming Yu, Chade Lv, Chunshuang Yan, Guihua Yu
Summary: This review emphasizes the importance of aqueous aluminum metal batteries (AMBs) and identifies the instability of the aluminum anode/electrolyte interface (AEI) as the main challenge to the further development of AMBs. The review also provides a systematic overview of recent progress in rational interface engineering principles and offers suggestions and perspectives for optimizing the aluminum anode and aqueous electrolytes to enable a stable and durable AEI.
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)
