Article
Chemistry, Analytical
Peiyu Duan, Huahua Xiao, Zhaoyu Wang, Qingkui Peng, Kaiqiang Jin, Jinhua Sun
Summary: This study successfully synthesized Pd-decorated SnO2 spherical composites using a hydrothermal method and demonstrated improved response and selectivity to low concentration hydrogen with UV irradiation, providing significant implications for future research in hydrogen detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Electrical & Electronic
Xingxin He, Zhihua Ying, Fei Wen, Lili Li, Xiaolong Zheng, Peng Zheng, Gaofeng Wang
Summary: MoS2, a two-dimensional material, has potential in gas sensor field due to its large specific surface area and remarkable electrical performance. However, previous studies found drawbacks in MoS2-based gas sensors, leading to low response and instability. By forming a composite material with a suitable amount of MoS2 and metal oxide (SnO2) through hydrothermal method, a SnO2/MoS2 sensor showed improved response at low SO2 concentration. The enhanced sensing characteristics of the sensor were discussed based on the depletion layer and SnO2/MoS2 heterojunction.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
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
Huishuang Jiang, Yang Qu, Xianfa Zhang, Rui Gao, Xiaoli Cheng, Shan Gao, Lihua Huo, Zoltan Major, Yingming Xu
Summary: In this study, flower-like Cl uniform doped In2O3 nanomaterials were prepared using ionic liquids as dopants. The material showed excellent sensing performance to NO2 under UV light, and chlorine doping facilitated the photogenerated electron leap. It was also found that the interaction between the material and NO2 gas was affected by the presence of oxygen in the environment.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Chu Manh Hung, Lai Van Duy, Dang Thi Thanh Le, Hugo Nguyen, Nguyen Van Duy, Nguyen Duc Hoa
Summary: By decorating Pd nanoparticles onto ZnO nanostructures, the optimal working temperature of the sensor can be significantly reduced, with improved response and recovery time to acetone, as well as increased sensitivity and detection limit. The Pd-ZnO sensor demonstrates effective reusability through multiple on/off switching cycles.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Nanoscience & Nanotechnology
Jiawen Shi, Sen Liu, Peng Zhang, Ning Sui, Shuang Cao, Tingting Zhou, Tong Zhang
Summary: The study showed that doping Pd and Sb into SnO2 nanoparticles can significantly reduce sensor resistance while improving sensitivity in methane detection. The sensors exhibited excellent performance including high response, fast response/recovery time, good reproducibility, and stability, attributed to the synergistic effects of novel metals, increased oxygen vacancies, and decreased band gap energy. This research provides a new opportunity to design metal oxide gas sensors with low resistance and high sensitivity.
Article
Materials Science, Multidisciplinary
Chaoqi Zhu, Xiang Li, Xiaoxia Wang, Huiyu Su, Chaofan Ma, Xiang Guo, Changsheng Xie, Dawen Zeng
Summary: In this work, a highly sensitive gas sensor based on Pd-doped SnO2 nanoparticles was developed for the detection of a nerve agent simulant called methyl salicylate. The Pd-doped SnO2 exhibited a significant improvement in detecting methyl salicylate at the ppb level, with a lower detection limit.
FRONTIERS OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Analytical
Myung Sik Choi, Ali Mirzaei, Han Gil Na, Sangwoo Kim, Dong Eung Kim, Kyu Hyoung Lee, Changhyun Jin, Sun-Woo Choi
Summary: This study proposed a method to enhance the gas sensing properties of metal oxide nanowires by preparing Pd metal catalyst surrounded by SnO2-x with structural defects on the surface of SnO2 nanowires. Gas sensing studies demonstrated the promising effects of this approach, showing the usefulness of significantly enhancing the gas sensing properties.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Mengyi Tian, Jun Ren, Chenbo Yin, Junjing Zhou, Shiyun Zhang, Zili Zhang
Summary: The study showed that a high concentration of PS template significantly influences the continuity and H2 sensing performance of porous SnO2 films, with the film containing 0.1 wt% PS microspheres exhibiting the best performance. At 225 degrees C, the response magnitude of the porous 1 mol% Pd-doped SnO2 thin film to 1000 ppm H2 is 93.18, approximately 10.58 times that of the pure sample.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Chandrakalavathi Thota, Jeevan Kumar Reddy Modigunta, Maddaka Reddeppa, Young Ho Park, Hyejin Kim, Hansol Kang, Samanth Kokkiligadda, Seongeun Lee, G. Murali, Sung Young Park, Insik In
Summary: In this study, a light-activated gas sensor utilizing carbon quantum dots and silver nanoparticles was successfully developed. By controlling the flow direction of photogenerated electrons and utilizing excellent oxygen dissociation ability, the sensor exhibited exceptional selectivity and sensitivity towards hydrogen sulfide gas, enabling detection at low concentrations.
Article
Nanoscience & Nanotechnology
Haoyuan Xu, Jianzhong Li, Peidong Li, Junjie Shi, Xuanwen Gao, Wenbin Luo
Summary: A light-assisted SO2 gas sensor based on PANI and Ag nanoparticle-comodified tin dioxide nanostructures exhibited remarkable sensitivity and recovery properties, with a rapid response time and excellent selectivity at room temperature. The UV-assisted sensor showed increased charge carrier density, improved charge-transfer capability, and high SO2 sensitivity, allowing for the rapid recovery of SO2 by utilizing hot electrons in a high-energy state in Ag/PANI/SnO2.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Yiqun Zhang, Chong Wang, Lianjing Zhao, Fengmin Liu, Xiaoying Sun, Xiaolong Hu, Geyu Lu
Summary: Ce-doped SnO2 materials were successfully prepared via a one-step hydrothermal method, and their gas-sensing performance was systematically evaluated, showing significant improvement in sensing performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Xingtai Chen, Tao Liu, Ran Wu, Jingkun Yu, Xitao Yin
Summary: Pd-modified Sb-doped SnO2 nanomaterials were prepared using a hydrothermal reaction and reduction method. The samples exhibited uniform doping of Sb within the SnO2 lattice and successful incorporation of Pd on the surface. Compared to pristine SnO2, the material with 3 mol% Sb doping and 7 wt% Pd decoration showed the highest response to hydrogen gas at high temperature, as well as excellent selectivity and cycling stability. The improved sensing performance was attributed to changes in the energy band structure, lattice distortion-induced oxygen vacancies, and strong metal-support interaction between Pd and SnO2.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Yuanyi Zhang, Xia Xin, Hui Sun, Qianru Liu, Jinniu Zhang, Gang Li, Jianzhi Gao, Hongbing Lu, Chunlan Wang
Summary: The porous ZnO-SnO2-Zn2SnO4 heterojunction nanofibers were prepared using electrospinning and high ramp rate heat treatment, showing significantly enhanced ethanol sensing capabilities under UV light irradiation. The response of ZnO-SnO2-Zn2SnO4 nanofibers to ethanol was much higher than that of pure Zn2SnO4 nanofibers, and remained effective even in high humidity conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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.