Article
Chemistry, Physical
Hamide Mohammad Aliha, Abbas Ali Khodadadi, Yadollah Mortazavi, Mohammad Nader Lotfollahi
Summary: The aim of this study is to investigate a new method of fabricating SnO2/polyaniline (PAni) nanocomposite sensors for detecting ammonia at room temperature. The synthesis of PAni is conducted through oxidative polymerization, and SnO2/PAni hybrid nanocomposites with varying percentages of polymer are fabricated using a deposition-precipitation method in the presence of SnCl4 solution. XRD, BET, FTIR, Raman, TGA, and FESEM tests are carried out to characterize the produced powders. The results show that increasing the PAni content in the nanocomposites leads to a decrease in SnO2 crystallite size, an increase in surface area, and improved thermal stability. The SnO2/8 wt% PAni exhibits the highest sensitivity, with a response of approximately 187% for 100 ppm NH3 at room temperature. The optimal heteronucleation and decoration of SnO2 on the PAni surface enhance the sensor's response. Additionally, the sensor demonstrates selectivity in the presence of interfering gases such as CO, ethanol, methane, toluene, and trichloroethylene.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Miao Liu, Peng Song, Dong Liang, Yongling Ding, Qi Wang
Summary: In this study, a 3D Ti3C2Tx MXene/rGO/SnO2 aerogel was successfully synthesized and its performance was evaluated. The sensor exhibited a high sensing response to 10 ppm formaldehyde at room temperature, along with excellent selectivity, short response and recovery times, and good repeatability and stability. The feasibility of the proposed formaldehyde sensing mechanism was supported by density functional theory calculations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Zhengkun Wu, Yanrong Wang, Peizhe Wang, Xu Cheng, Qiao Wang, Yifan Yang, Yibing Luo, Beixi An, Erqing Xie
Summary: The development of simple and low-cost materials and methods for NO2 sensors is crucial for their commercialization. Au-modified SnO2 nanorods synthesized via hydrothermal method combined with photodeposition exhibit excellent NO2-sensing properties, including high response, low detection limit, and fast response/recovery time at room temperature. The sensor also shows good selectivity, repeatability, long-term stability, and performs well in a high-humidity environment.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Physical
Lili Li, Chenguang Wang, Zhihua Ying, Wei Wu, Yongqian Hu, Weihuang Yang, Weipeng Xuan, Yang Li, Fei Wen
Summary: This paper reported a low concentration CO gas sensor based on SnO2 modified graphene nanocomposite at 25 degrees C. The SnO2/graphene nanocomposite exhibited higher CO gas sensing performance than pure SnO2, showing a high response to CO at 25 degrees C, shorter response and recovery times, excellent repeatability and stability. The excellent CO sensing performance of the composite is attributed to graphene's ability to provide a large surface area for adsorption sites and prevent the disagglomeration of SnO2 nanoparticles.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Zhou Li, David W. W. Gardner, Yong Xia, Sikai Zhao, Aifei Pan, Nishit Goel, Stephen Bart, Chen Liu, Jianxin Yi, Carlo Carraro, Roya Maboudian
Summary: Ordered porous thin films of reduced graphene oxide and tin oxide (rGO/SnO2) were synthesized and their gas-sensing properties were studied. The incorporation of rGO significantly improved the humidity sensitivity and electrical conductivity of the sensor. The rGO/SnO2 composite film also demonstrated fast response time and excellent selectivity towards humidity, and showed long-term stability compared to a commercial humidity sensor.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Environmental
Ji Li, Ming Yang, Xiaoli Cheng, Xianfa Zhang, Chuanyu Guo, Yingming Xu, Shan Gao, Zoltan Major, Hui Zhao, Lihua Huo
Summary: The study synthesized porous SnO2 nanotoasts with a large surface area and fabricated thick film sensors with high response to NO2 gas. The sensors exhibited excellent performance at 50 degrees C, including high response, low detection limitation, fast response time, and wide detection range.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Ao Liu, Siyuan Lv, Li Jiang, Fangmeng Liu, Lianjing Zhao, Jing Wang, Xiaolong Hu, Zijie Yang, Junming He, Chenguang Wang, Xu Yan, Peng Sun, Kengo Shimanoe, Geyu Lu
Summary: The study developed an NH3 gas sensor based on PANI composited with MoS2 nanosheet-coated SnO2 nanotubes, showing excellent response signal and low detection limit. The sensor exhibited good performance, response-recovery time, repeatability, flexibility, and selectivity at room temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Vo Thanh Duoc, Chu Manh Hung, Hugo Nguyen, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: The grafted structures between SnO2 and ZnO nanowires were achieved through a two-step growth process, showing promising sensitivity for NO2 gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Hao Zhang, Siyuan Gao, Zeyao Feng, Zhen Sun, Xianwen Yan, Zhenhua Li, Xueli Yang, Guofeng Pan, Ye Yuan, Lanlan Guo
Summary: A room temperature H2S gas sensor with low detection limit is necessary for practical application. In this work, CuO/ZnFe2O4 porous spheres were synthesized and demonstrated excellent sensing performance, including high sensitivity, good selectivity, low detection limit, good repeatability, and fast response/recovery time. The sensitization effect of CuO played a key role in the sensing mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Peng Wu, Yi Li, Song Xiao, Dachang Chen, Junyi Chen, Ju Tang, Xiaoxing Zhang
Summary: A Ti3C2Tx-SnO2 nanocomposite sensor shows superior sensitivity, high selectivity, strong anti-interference ability, and excellent long-term stability for room-temperature detection of the gas insulating medium C4F7N. The synergistic effect between SnO2 and Ti3C2Tx, along with the strong adsorption ability of SnO2 to C4F7N, enhances the sensing mechanism. This work demonstrates the feasibility of the Ti3C2Tx-SnO2 sensor for actual engineering applications, providing distribution rules with high sensing efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Xuehua Chen, Chao Qin, Zicheng Zheng, Hanwen Chi, Zhizhen Ye, Liping Zhu
Summary: Gas sensors with desirable repeatability and controllable fabrication play a crucial role in practical applications. Co-MOF-derived Co3O4 exhibits promising potential as a gas-sensing material due to its large surface area, high porosity, and abundant oxygen defects. However, traditional sensor fabrication methods have limited the advantages of Co-MOF precursor. In this study, in-situ sensors based on Co3O4 porous films with controlled nanoscale thickness were directly prepared on ceramic substrates using Co-MOF films as precursors. To enhance the conductivity, SnO2 catalytic overlayers were introduced on top of Co3O4 sensors, resulting in the construction of SnO2/Co3O4 bilayer sensors that showed promising performance in triethylamine (TEA) detection at room temperature (RT).
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Huimin Yu, Longhui Dai, Yangquan Liu, Yue Zhou, Ping Fan, Jingting Luo, Aihua Zhong
Summary: Superior NH3 sensors with high response and stability were successfully obtained by wrapping SnO2 nanoparticles on Ti3C2Tx MXene nanosheets via a facile hydrothermal method. The Ti3C2Tx MXene-SnO2 composite exhibited excellent NH3 gas detection at room temperature with a response as high as 75% for 500 ppm NH3 gas. The composite also showed fast response and recovery times of 109 and 342 s, respectively. Moreover, the Ti3C2Tx MXene-SnO2 composite demonstrated high selectivity and stability for NH3 gas sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Dipyaman Mohanta, Md Ahmaruzzaman
Summary: A novel gas sensor based on Ag nanoparticles, tin oxide, and carbon nitride nanocomposite (Ag-SnO2-beta C3N4) was successfully fabricated and showed excellent sensitivity towards room-temperature NO2 gas sensing. The ternary nanocomposite sensor exhibited superior response time and recovery time for low concentrations of NO2 gas, attributed to its higher conductivity and catalytic activity. Additionally, the sensor displayed synergistic response compared to other sensors, showcasing its potential for gas-sensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Q. N. Abdullah, A. R. Ahmed, A. M. Ali, F. K. Yam, Z. Hassan, M. Bououdina
Summary: Nanostructured beta-Ga2O3 nanobelts were successfully fabricated using a thermal evaporation method, and a sol-gel processed SnO2 layer was deposited to modify the functionality of gallium oxide. The sensing characteristics of SnO2-functionalized beta-Ga2O3 nanobelts towards analyte gas H2 were found to be greatly improved within a certain concentration range.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Weimeng Zheng, Zhongyue Zhang, Nannan Liu, Qingyu Li, Jianbo Sun
Summary: Heterolayered SnO2/SnSe nanosheet composites were synthesized and used as a highly sensitive sensor for NO2 detection at room temperature. The sensor exhibited high sensitivity and selectivity, as well as a low detection limit. The improved sensing performance was attributed to the presence of abundant heterojunctions and enhanced interface charge transfer in the material.
ACS APPLIED NANO MATERIALS
(2022)
