Article
Materials Science, Multidisciplinary
F. Y. Zhou, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, Y. X. Zeng, X. L. Peng, H. L. Ge, X. Q. Wang
Summary: Mesoporous SnO2, Sn0.861Al0.186O2, Sn0.921In0.106O2, and Sn0.959La0.055O2 nanospheres were successfully synthesized using a one-step solvothermal method. The gas-sensing performance of the doped SnO2 nanospheres was characterized by XRD, EDS, TEM, SEM, FT-IR, UV-vis, and BET. The results showed that cations-doping greatly affected the formaldehyde gas-sensing performance, and the response increased with the increasing radius of Al, In, and La. Sn0.959La0.055O2 sensor exhibited the best gas-sensing performance with a response value of 149.59 to formaldehyde gas at 200 degrees C.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Lingxiao Xue, Yuan Ren, Yanyan Li, Wenhe Xie, Keyu Chen, Yidong Zou, Limin Wu, Yonghui Deng
Summary: In this study, Pt-Pd/SnO2 nanoalloy functionalized mesoporous microspheres were successfully synthesized for real-time monitoring of methane. The synthesized material exhibited excellent sensing performance and stability.
Article
Materials Science, Ceramics
Emanuel P. Nascimento, Hellen C. T. Firmino, Adillys M. C. Santos, Herbet B. Sales, Vinicius D. Silva, Daniel A. Macedo, Gelmires A. Neves, Eliton S. Medeiros, Romualdo R. Menezes
Summary: This paper presents the facile synthesis of hollow F-doped SnO2 nanofibers using SBS and their ethanol sensing performance for the first time. The as-prepared nanofibers, characterized by SEM, XRD, BET, FTIR, and EIS, exhibited mesoporous structure and showed fast high-responsive ethanol sensing behavior at room temperature due to the combination of nanocrystalline hollow structure and F doping. These results suggest that F-doped SnO2 hollow nanofibers are promising for practical low-temperature ethanol gas sensors.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Yuyang Cheng, Tingting Shao, Juntang Dong, Huirong Kou, Fuchun Zhang, Jiaming Guo, Xingxing Liu
Summary: Sn@Zn MOF composites with different Sn/Zn molar ratios were synthesized by one-step solvothermal method and calcined to obtain SnO2@ZnO composites with ZnO nanoparticles grown on the surface of SnO2 quadrangular prism. The structure, morphology, and gas sensing performance of the prepared samples were investigated. The SnO2@ZnO composites exhibited a lower optimum operating temperature and higher response compared to pure SnO2.
Article
Chemistry, Physical
Huiqing Fan, Xiaokun Zheng, Qi Shen, Weijia Wang, Wenqiang Dong
Summary: A hierarchical SnO2 nanosheet structure loaded with Pt nano quantum dots was prepared and exhibited high gas sensitivity and excellent response and recovery behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Environmental Sciences
Ankit Kumar Vishwakarma, Lallan Yadava
Summary: In this study, undoped and Pd-doped SnO2 films were fabricated on alumina substrate using screen printing technology. The microstructural properties of the deposited sensing film were characterized using XRD and AFM, showing a decrease in crystallite size, grain size, and roughness parameter with Pd doping. The response of the sensor to ethanol gas was found to be maximum for 1 wt% Pd-doped SnO2, with an observed response/recovery time of approximately 41 s/125 s. The improvement in sensing behavior towards ethanol gas was attributed to the reduction in crystallinity and roughness of the film.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Sikai Zhao, Yanbai Shen, Yong Xia, Aifei Pan, Zhou Li, Carlo Carraro, Roya Maboudian
Summary: In this study, NiO/ZnO heterostructured nanowires were synthesized using a two-step liquid phase route, and their gas sensing characteristics were investigated. The sensors showed high sensitivity and stability at the optimum operating temperature of 300 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Yunan Wang, Shendan Zhang, Chaozhu Huang, Fengdong Qu, Dong Yao, Haichuan Guo, Haohao Xu, Chunjie Jiang, Minghui Yang
Summary: In this study, ordered mesoporous materials WO3 and Au-loaded WO3 (Au-WO3) sensors were prepared using KIT-6 as a template. The Au-WO3 sensor showed better selectivity and higher response to TMA gas compared to the pristine WO3 sensor. With a working temperature of 268 degrees C, the Au-WO3 sensor exhibited a response (Ra/Rg) of 41.56 to 100 ppm TMA with a response time of 1 second, as well as excellent response/recovery capabilities and stability. The high sensing performances are mainly attributed to the electronic and chemical sensitization of the noble metal Au and the presence of a high specific surface area supported by the mesoporous structure, making Au-doped mesoporous WO3 a promising material for high performance TMA gas sensors.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Analytical
Run-Hui Wang, Wei Wen, Shilie Zheng, Zhizhen Ye, Jin-Ming Wu
Summary: In this study, a layered mesoporous aggregate of tin oxide nanocrystals with high specific surface area and mesoporous structure was synthesized. The tin oxide showed high ethanol sensing performance at low temperatures, with high selectivity and stability. The ethanol sensing mechanism changed with increasing operating temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
S. Blessi, A. Manikandan, S. Anand, M. Maria Lumina Sonia, V. Maria Vinosel, Abeer Mohamed Alosaimi, Anish Khan, Mahmoud Ali Hussein, Abdullah M. Asiri
Summary: This study demonstrates the capability of Al3+ ions as a dopant in mesoporous SnO2 nanopowders for humidity sensor and electrochemical applications. By controlling the concentration of Al3+ ions, the material shows excellent structural, morphological, optical, and electrochemical properties, with quick response and recovery time in humidity sensing applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Chemistry, Physical
Zicheng Cai, Eunjung Goo, Sunghoon Park
Summary: Ethanol sensors with superior performance were fabricated using Au nanoparticles decorated SnO2 hollow nanospheres (Au-SnO2 HNS). The ethanol-sensing response of SnO2 HNS improved 2.7 times when exposed to 100 ppm ethanol gas measured at 250 degrees C, showing selective sensing response towards ethanol gas compared to other VOC gases. The improved sensing properties were attributed to the optimized morphologies of the sensing materials and the catalytic effect of the Au nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Nguyen Manh Hung, Chu Manh Hung, Nguyen Van Duy, Nguyen Duc Hoa, Hoang Si Hong, Tran Khoa Dang, Nguyen Ngoc Viet, Le Viet Thong, Phan Hong Phuoc, Nguyen Van Hieu
Summary: A unique combination of nanojunction-networked SnO2 nanowires and pulsed UV-radiation shows high response gas sensors working at room temperature. The pulsed UV-radiation significantly enhances gas response and reduces response and recovery times. The enhancement of gas response is attributed to the photogeneration of electron-hole pairs.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Crystallography
Pham Hong Thach, Tran Van Khai
Summary: This study synthesized ZnO nanowires and explored the relationship between their optical properties and gas-sensing performance. The results showed that the ZnO nanowires have excellent crystalline quality and good optical properties, and can detect NO2 gas at low concentrations.
Article
Chemistry, Multidisciplinary
Wei Xiao, Zhao Jin, Wei Yang, Shantang Liu
Summary: An ethanol sensor with an obvious response and fast detection speed has been developed by constructing Ni-doped SnO2 nanosheets. The sensor showed a high response and short response/recovery time for ethanol vapor, which is attributed to the unique structure and chemical properties of the doped SnO2. This work presents an efficient strategy for exploiting high-performance gas sensors through morphology design and doping engineering.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Siyu Wang, Jiaxiong Guo, Zhidong Lin, Liming Liu, Yuchong Hui, Xiaowen Zhang
Summary: A series of very small grain Au/SnO2 composites were synthesized using a simple hydrothermal method. The composites showed a hierarchical structure composed of 20-30 nm spherical nanoparticles, consisting of 8 nm Au cores and 5 nm SnO2 nanograins. The porous composites exhibited high sensitivity and selectivity to n-butanol at low working temperatures. The study suggests that controlling the grain size of SnO2 and using gold nanoparticles can improve the gas-sensing properties of SnO2 at low temperatures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
