Article
Chemistry, Physical
Liyong Du, Heming Sun, Yi Liu
Summary: The Mo-doped Co3O4 sample showed superior gas sensing performance compared to pure Co3O4, with high response values, short recovery time, excellent gas selectivity, and long-term stability. This improved performance is attributed to Mo doping and hierarchical flower-like microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Huiling Liu, Hailiu He, Liqiang Chen, Qingjiang Pan, Guo Zhang
Summary: Flower-like Co3O4 microspheres composed of thin nanosheets were successfully synthesized, showing high gas sensitivity with a response of 72.3% to 100 ppm NOx and a detection limit lower than 70 ppb. The outstanding performance can be attributed to its unique structure and surface oxygen vacancies.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Fangjun Wang, Jiang Wu, Shiyi Chen, Lunbo Duan
Summary: In this study, CoS/g-C3N4 heterojunction materials with different CoS mass ratios were prepared and applied for the first time in the photocatalytic reduction of CO2. The p-n-type heterojunction effectively reduces the recombination of electron-hole pairs and enhances the utilization of visible light. The CoS/g-C3N4 composite exhibits excellent photocatalytic activity and selectivity for CH4 production, making it a promising catalyst for CO2 reduction.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Analytical
Liupeng Zhao, Rongrong Jin, Chen Wang, Tianshuang Wang, Yanfeng Sun, Peng Sun, Geyu Lu
Summary: In this study, a ZnO-Co3O4 heterostructure was successfully prepared on a nanosheet hollow sphere structure. The fabricated sensor using 3 at% ZnO-Co3O4 hollow composite showed enhanced acetone sensing performance at a low operating temperature, which was about 5.1 times higher than that of Co3O4-based sensor. Additionally, the ZnO-Co3O4 based sensor exhibited a ppb-level detection limit. The improved sensitivity and lower detection limit of the sensor can be attributed to the formation of n-p heterojunctions, which reduces the degree of band bending and surface hole concentration.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Electrical & Electronic
Mehdi Shoorangiz, Leila Shariatifard, Hossein Roshan, Ali Mirzaei
Summary: In this study, flower-like V2O5 nanostructures were synthesized using a hydrothermal method. The synthesized products were characterized using various techniques and the gas sensing properties of the sensors were evaluated. The results showed that the sensor prepared for 4 hours exhibited better ethanol sensing properties and had a significant response to low levels of ethanol gas at low temperature.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Kun Li, Xiao Chang, Xurong Qiao, Shifan Yu, Xiaofang Li, Fujun Xia, Qingzhong Xue
Summary: Metal-organic frameworks (MOFs) derived metal oxides, particularly Zn-doped Co3O4, show excellent gas-sensing properties, including high response, low detection limit, outstanding selectivity, long-term stability, and independence to humidity, which can be attributed to changes in carrier concentration, specific surface area, and chemisorbed oxygen amount due to Zn doping.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Rongrong Jin, Yueru Jiang, Liupeng Zhao, Tianshuang Wang, Xiaomin Liu, Fangmeng Liu, Xu Yan, Peng Sun, Geyu Lu
Summary: In this study, Ru-doped Co3O4 flower-like hollow microspheres were successfully synthesized via a hydrothermal method, and their gas sensing performance was investigated. The Ru-doped Co3O4 sensor showed excellent acetone sensing performance with an ultra-low detection limit.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Heming Sun, Xiaonian Tang
Summary: In this study, hierarchical flower-like strontium-doped cobalt oxide (Co3O4) has been synthesized using a metal-organic framework (MOF) as a sacrificial template. The Sr-doped Co3O4 exhibits excellent sensing properties towards triethylamine (TEA) gas, with high response values, short response/recovery time, excellent selectivity, and long-term stability. The enhanced sensing properties are attributed to the synergistic effect of more oxygen vacancies and larger surface area provided by the flower-like structure.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Environmental
Song Li, Jing Pu, Shiping Zhu, Yingang Gui
Summary: An experimental platform was built to verify the excellent properties of a composite sensitive material, and a gas sensing data prediction model was established to predict carbon monoxide concentration successfully.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Ceramics
Yinghua Qiu, Yunpeng Wang
Summary: A simple strategy for synthesizing porous Co3O4 nanostructures through a hydrothermal process was introduced. The Co3O4 nanorods obtained demonstrated porous structural features and showed excellent gas sensing properties with high response and short response and recovery time to ethanol, as well as anti-interference ability towards other gases.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Gang Li, Yuanyi Zhang, Qingfei Liang, Jinniu Zhang, Jia Liu, Yumeng Liu, Chunlan Wang, Jianzhi Gao, Hongbing Lu
Summary: In this study, Co3O4-TiO2 porous heterojunction nanosheets derived from BMOFs were constructed and used for ethanol sensing. The Co3O4-TiO2 nanosheets showed better sensing performances than TiO2 nanotablets, and the nanosheets with an optimal molar ratio of 12 mol% exhibited the highest response value and selectivity coefficient.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiuqing Xi, Qi Dang, Ganyu Wang, Wenqian Chen, Liang Tang
Summary: This study successfully achieved efficient photocatalytic hydrogen production using ZnIn2S4@CoS2 heterostructures as photocatalysts. The heterostructures were prepared by using Co3O4 derived from ZIF-67. The enhanced photocatalytic activity was attributed to the faster electron transfer and more efficient electron-hole pair separation at the interface between CoS2 and ZnIn2S4.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
K. Arjun, Balasubramanian Karthikeyan
Summary: The study focuses on the negative UV photoresponse of flexible nanocomposite films consisting of flower-like ZnO and conducting polymer. The negative photoresponse decreases after reaching a critical concentration of ZnO in the nanocomposite, as observed by preparing NC films with varying ZnO loading. The structural, optical, and thermal properties of the nanocomposite films were investigated using various analytical techniques to understand the behavior of ZnO in the flexible transparent plastic sheets.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Ye Zhu, Li Yang, Shenghui Guo, Ming Hou, Yanjia Ma
Summary: In this study, a morphogenetic-based Sn/SnO2 graded-structure composites were synthesized, consisting of two-dimensional SnO sheets self-assembled into flower-like structures. The as-synthesized samples were characterized using SEM, XRD, XPS, and other techniques. The gas-sensing properties of the flower-like Sn/SnO2 gas sensor were thoroughly investigated, showing exceptional selectivity, a rapid response time of 4 s, and an ultrahigh response at 250 degrees C (Ra/Rg = 17.46). The enhanced ethanol-gas-sensing properties were attributed to the three-dimensional structure and the rise in the Schottky barrier caused by in situ production of tin particles.
Article
Chemistry, Analytical
Pengfei Cheng, Fan Dang, Yinglin Wang, Jianning Gao, Luping Xu, Chen Wang, Li Lv, Xu Li, Bao Zhang, Baijun Liu
Summary: In this study, hierarchical flower-like Ni-doped Co3O4 was successfully synthesized using a facile method, and the effect of ethanol/water ratio on samples was investigated. Gas sensors based on the prepared materials showed excellent performance, with the sensor using 5.3 mol% Ni-doped Co3O4 microflowers exhibiting the highest response towards n-butanol, as well as outstanding anti-humidity properties and long-term stability. The improved gas sensing properties were attributed to the unique hierarchical flower-like microstructure and optimized parameters resulting from the Ni doping.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Dongping Xue, Junjun Wang, Yan Wang, Guang Sun, Jianliang Cao, Hari Bala, Zhanying Zhang
Article
Materials Science, Multidisciplinary
Shaowei Wang, Hongyuan Li, Bowen Zhang, Zu-an Guo, Hari Bala, Shujuan Yao, Jingyi Zhang, Can Chen, Wuyou Fu, Jianliang Cao, Guang Sun, Zhanying Zhang
ORGANIC ELECTRONICS
(2020)
Article
Chemistry, Physical
Yan Wang, Yuanyuan Cui, Xiaoning Meng, Zhanying Zhang, Jianliang Cao
Summary: In this study, Ag-modified ZnO flower-like microspheres were prepared and showed promising performance in CO and CH4 gas sensing detection, indicating broad application prospects in the future.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Wendi Tian, Yan Wang, Yan Zhang, Jianliang Cao, Rong-Feng Guan
Summary: The hybrid metal/semiconductor nanocomposites provide a flexible strategy for exploring effective chemiresistive gas sensors. The WO3/h-BN nanostructure with 5 wt % h-BN content shows the most outstanding response to 500 ppm of TEA at 260 degrees C, nearly 2.2 times higher than pristine WO3. These results demonstrate the potential application of h-BN in high-performance gas sensors in the future.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Dengke Li, Yanwei Li, Xiaohua Wang, Guang Sun, Jianliang Cao, Yan Wang
Summary: This study proposes a strategy to improve the sensitivity and selectivity of In2O3 to triethylamine (TEA) by using a silver (Ag) modification method, and successfully prepares Ag-modified In2O3 nanoparticles. The experimental results demonstrate that the Ag/In2O3 sensor exhibits significantly improved sensitivity and selectivity towards TEA at a lower working temperature.
Article
Chemistry, Analytical
Lianyun Cheng, Yanwei Li, Guohua Cao, Guang Sun, Jianliang Cao, Yan Wang
Summary: A sensitization strategy was proposed to improve the gas sensing performance of ZnO by constructing ZnS-ZnO n-n heterojunction. The gas sensing tests indicated that after modification with ZnS-ZnO heterojunctions, the gas sensing performances of the ZnO PHS sensor were remarkably improved, especially in terms of response speed, sensitivity, and selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Linghao Zhu, Yan Wang, Cong Qin, Jianliang Cao
Summary: This study investigates the properties and performances of WS2 and its modifications in the photocatalytic reduction of CO2 using first principles calculations. The results demonstrate that the introduction of S vacancies and Pt cluster loading can greatly enhance the optical absorption of the material, thus promoting the conversion of CO2 into valuable chemicals and fuels. This study provides valuable insights for the design of efficient CO2 reduction catalysts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Xueya Sun, Linghao Zhu, Cong Qin, Jianliang Cao, Yan Wang
Summary: This work explores the photo-activation route to monitor methane at room temperature and enhances methane gas-sensing performance by surface morphology engineering. ZnO structures with different crystal facets were obtained. The gas-sensing performances of sensors based on these structures were tested, and ZnO spheres showed the best response and fastest response time. The enhanced gas sensing properties are attributed to high-energy exposed facets and unique hollow structures. Density functional theory (DFT) was also investigated to support the effect of crystal facets.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Cong Qin, Yongjie Zhang, Yan Wang, Yan Zhang, Jianliang Cao
Summary: Designing a reliable sensor for indoor formaldehyde (HCHO) with high sensitivity and selectivity is crucial for environmental and health protection. This study reported HCHO sensors based on a nanoporous mixed-phase In2O3 nanoparticle, which exhibited excellent sensing performances with a large response value, good selectivity, and a short response time. The unique structure and properties of the In2O3 nanoparticle, including the mixed-phase homojunction structure and the large specific surface area, contribute to its potential application in low-concentration HCHO detection under low power consumption.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Linghao Zhu, Cong Qin, Yan Wang, Jianliang Cao
Summary: Using density functional theory, the photocatalytic CO2 reduction of WS2-based single-atom catalysts was investigated. It was found that non-metals (B, C, and N) doped WS2 (X-WS2) could significantly enhance the photocatalytic performance of CO2 reduction. Compared to Pt@WS2, Pt@B-WS2 could reduce the Gibbs free energy from 1.41 to 1.01 eV. The introduction of the B atom improved the metal-support interaction, stabilized the Pt single-atom, and effectively promoted charge separation and transfer, leading to higher photocatalytic performance for converting CO2 to CH4. This study provides a strategy to design superior single-atom catalysts for photocatalytic conversion of CO2 to carbon-neutral fuels.
APPLIED SURFACE SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Run Zhang, Cong Qin, Hari Bala, Yan Wang, Jianliang Cao
Summary: Gas-sensing technology, particularly spinel ferrite-based gas sensors, has gained attention for environmental safety and human health concerns. This review article provides an overview of recent developments in spinel-ferrite gas sensors, focusing on the sensing mechanism, unique properties, and advancements in microstructures, element doping, and heterostructure materials. The integration of spinel ferrite with other semiconductors shows potential for enhancing selectivity and overall sensor performance. The combination of spinel ferrite and semiconductors can improve the selectivity, stability, and sensing performance of gas sensors, which is crucial for practical applications. The review highlights the potential of spinel-ferrite-based gas sensors and their importance in early detection and warning systems.
Article
Chemistry, Physical
Linghao Zhu, Cong Qin, Yan Wang, Jianliang Cao
Summary: This study investigates the photocatalytic CO2 reduction performance of PtOx-WS2 catalysts, and finds that Pt4O6, Pt5O8, and Pt8O13 loaded on WS2 have good catalytic effects in producing CH3OH, HCOOH, and CH4.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Wen-Di Tian, Xiao-Ze Li, Jian-Liang Cao, Yan Wang
CHINESE JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Materials Science, Biomaterials
Jun Xu, Xiao-Ke Shen, Lei Jia, Jian-Liang Cao, Yan Wang, Xiao-Lei Zhao, Ning Bi, Sheng-Li Guo, Tian-Yi Ma
JOURNAL OF MATERIALS CHEMISTRY B
(2019)
Article
Chemistry, Physical
Linghao Zhu, Yan Wang, Cong Qin, Jianliang Cao
Summary: The introduction of S vacancies and Pt clusters can enhance the optical absorption of WS2 in the visible light region, improving the photocatalytic reduction of CO2 and lowering the energy barrier for key intermediate formation. Strong metal-support interaction between Pt and WS2 facilitates the formation of products.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
