Article
Chemistry, Physical
Zenghui Sima, Peng Song, Qi Wang
Summary: The ZnSnO3 hollow cubes were successfully modified by Ag nanoparticles, which generated Schottky barrier-type junctions and enhanced the sensing performance. The gas-sensing results showed excellent response value (26.7) towards 50 ppm formaldehyde at 100 degrees C, as well as fast response/recovery time (12/18 s), remarkable reproducibility, and outstanding stability. The sensing mechanism was proposed based on the structure of ZnSnO3 hollow cubes and the catalytic activity of Ag NPs. This work confirms that Ag NPs modification is an efficient strategy to improve the sensing properties of ZnSnO3-based gas sensors.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Xueya Sun, Linghao Zhu, Yan Zhang, Mengwei Li, Yihui Wang, Cong Qin, Yan Wang
Summary: In this study, ZnO microspheres modified by Au nanoparticles were synthesized and investigated for their CH4-sensing performance at room temperature. The results showed that Au modification can enhance the gas-sensing properties of the sensors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Qingqing Xie, Zenghui Sima, Qi Wang, Peng Song
Summary: This paper successfully prepared Fe-doped ZnSnO3 cubes and found that Fe-doped ZnSnO3 has high selectivity and response value for formaldehyde gas, as well as fast response/recovery time and good recovery performance.
Article
Chemistry, Analytical
Yu Peng, Bei Cheng, Liuyang Zhang, Jingjing Liu, Jiaguo Yu
Summary: A highly responsive formaldehyde sensor of In2O3@ZnO derived from MIL-68(In)@ZIF-8 precursor was successfully prepared in this study. By adjusting the ratio of In2O3 and ZnO, the resulting sensor showed significantly improved performance under 100 ppm HCHO at an operating temperature of 220 degrees C, with a detection limit as low as 4 ppb. The sensor also exhibited excellent selectivity (Q >= 10), anti-interference (deviation value <= 3.5%), and long-lasting stability (variation value <= 4%). This work highlights the significant improvement in gas sensing performance through ingenious heterojunction construction.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Environmental Sciences
Jesse Nii Okai Amu-Darko, Shahid Hussain, Xiangzhao Zhang, Asma A. Alothman, Mohamed Ouladsmane, M. Tariq Nazir, Guanjun Qiao, Guiwu Liu
Summary: Through thermal treatment, a mixed heterostructures In2O3/ZnO hollow nanocages were prepared, which showed exceptional sensitivity and selectivity to hydrogen sulfide gas, greatly improving the gas sensing performance.
Article
Chemistry, Analytical
Lijia Zhao, Shupeng Sun, Su Zhang, Zhi Liu, Baoyu Huang, Nan Wang, Jianwei Zhang, Xiaogan Li
Summary: The hollow ZnO@TiO2 heterostructured nanospheres were successfully synthesized by hydrothermal method, and the response and recovery time of the sensor towards formaldehyde were significantly improved by UV activation.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Ceramics
Zong-Mu Dong, Qian Xia, Haibo Ren, Xin Shang, Xiaojing Lu, Sang Woo Joo, Jiarui Huang
Summary: A novel composite of hollow SnO2/ZnO cubes was prepared using a self-template hydrothermal method and a calcination process. The morphology and structure of the composites were characterized, and the formation mechanism of the hollow cube-like structure was explored. The hollow SnO2/ZnO cube sensor exhibited a strong response, fast response/recovery time, good linearity, repeatability, and stability, attributed to the combined advantages of hollow structures and heterojunctions.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Mingze An, Li Li, Qianqian Wu, Hualiang Yu, Xinyu Gao, Wenlin Zu, Jiahui Guan, Yan Yu
Summary: In this study, a three-dimensional ordered hollow spherical ZnTiO3-ZnO-TiO2 composite modified with CdS quantum dots was successfully prepared, exhibiting a complex crystal structure and chemical composition, which showed high photocatalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Hyeuk Jin Han, Gyu Rac Lee, Yujin Han, Hanhwi Jang, Eugene N. Cho, Sunho Kim, Chang Sub Kim, Soonmin Yim, Jae Won Jeong, Jong Min Kim, Seunghee Yu, Harry L. Tuller, Yeon Sik Jung
Summary: Controlled fabrication of three-dimensional metal oxide nanowire networks can greatly enhance signal stability and sensor response compared to random nanowire arrays. Systematic engineering and modeling of 3D geometries provide insights into the electrical conduction and gas-sensing response of 3D assemblies, revealing the critical importance of wire-to-wire junction points and their arrangement, to improve both performance and reliability of chemical sensors.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Youzhi Yang, Sini Wu, Yuehong Cao, Shuang Li, Tengfeng Xie, Yanhong Lin, Ziheng Li
Summary: The development of room-temperature formaldehyde gas sensors with superior response-ability is crucial for various applications. In this study, Ni-doped ZnO hierarchical porous structures decorated with NiS composite materials were synthesized and used in room-temperature UV light-activated formaldehyde sensors. The 0.2% NiS/0.4% Ni-ZnO material showed a higher response value and faster response/recovery time compared to pure ZnO, which was attributed to the synergistic effect of Ni doping and NiS modification.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Jihoon Lee, Jaebum Park, Jeung-Soo Huh
Summary: Due to the increasing construction of new buildings, the emission of indoor air pollutants such as formaldehyde and volatile organic compounds has increased, causing adverse effects on human health, including life-threatening diseases like cancer. To measure and monitor this phenomenon, a gas sensor was developed. The gas sensor was fabricated using an alumina substrate with Au, Pt, and Zn layers formed on the electrode, and it was classified into two types, A and B, representing the graphene spin coating before and after heat treatment, respectively. By investigating the variation in sensing accuracy of the target gas with operating temperature and conditions, it was found that the sensor exhibited excellent sensing characteristics even at low temperatures of 150°C, 200°C, and 250°C, compared to the ZnO sensor showing excellent sensing characteristics at 350°C.
Article
Chemistry, Multidisciplinary
Lunwei Yang, Wei Xiao, Jianwei Wang, Xiao-Wu Li, Ligen Wang
Summary: This study compares the adsorption properties of various gases on graphene-based sensors and finds that oxygen functionalized graphene improves the selectivity for formaldehyde detection. The sensing properties of the sensors are evaluated and the predicted responses for formaldehyde detection are 76% and 32% in different directions. This research provides insights for designing graphene-based sensing materials with high selectivity.
Article
Chemistry, Analytical
Surajit Das, Sumit Kumar, Jitendra Singh, Mahesh Kumar
Summary: The research introduces a synthesis technique to obtain ZnO nanoparticles via laser ablation method and fabricates an n-type ZnO/n-type SnO2 heterojunction sensor, showing excellent sensing performance that can detect as low as 0.25 ppm HCHO.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Ke Zhang, Yu Shen, Yunsheng Li, Wenrui Zhang
Summary: This study successfully synthesized ZnO@In2O3 heterojunction nanocomposites with ultra-sensitive response to ethanol. The unique structure and characteristics of the composites contribute to their excellent gas sensing properties, including improved sensitivity, reduced energy consumption, and excellent repeatability and stability.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Analytical
Heming Sun, Xiaonian Tang, Shuo Li, Ye Yao, Li Liu
Summary: One-dimensional hollow structure MOF-derived Ru/Mo co-doped Co3O4 hollow microtubes with excellent sensing performance were obtained through a simple solvothermal method. The 0.3% Ru/Mo-Co3O4 sample showed high responses to 126-100 ppm TEA at a low operating temperature of 160 degrees C, and displayed rapid response/recovery speed, good selectivity and repeatability, and excellent long-term stability. The construction of the 1D hollow architecture and the synergistic effect of Ru/Mo co-doping contributed to the good TEA sensing performance.
SENSORS AND ACTUATORS B-CHEMICAL
(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)