Article
Nanoscience & Nanotechnology
Xiaoyan Song, Fangzheng Zhao, Zhipeng Wang, Runbin Ge, Jinfeng Xing
Summary: In this study, ZnO@SnO2-Pt core-shell nanofibers with a hollow structure were successfully prepared and exhibited superior gas-sensing performance, achieving higher response speed and sensitivity on the basis of reduced operating temperature. Additionally, the gas-sensing mechanism of the nanofibers was discussed in detail.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Dong Jae Yu, Wansik Oum, Ali Mirzaei, Ka Yoon Shin, Eun Bi Kim, Hyeong Min Kim, Sang Sub Kim, Hyoun Woo Kim
Summary: We synthesized pristine SnO2 nanoparticles and Au@SnO2 core-shell nanocomposites for xylene gas sensing. The Au@SnO2 core-shell nanocomposites showed better response and selectivity compared to the pristine SnO2 nanoparticles, demonstrating the promising effects of the Au@SnO2 core-shell structure for xylene sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Yan Gong, Xiaofeng Wu, Xiaofei Li, Anqi Wang, Min Zhang, Yunfa Chen
Summary: Core-shell Pt@Al-doped ZnO nanoparticles were synthesized and assembled into a sensor, showing excellent sensitivity and low detection limit towards acetone. The synergistic effect between Al doping and metal-ZnO hetero-interfaces significantly improves the acetone sensing properties of the sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Shichao Wang, Xiaohu Wang, Gaoqun Qiao, Xiaoyan Chen, Xinzhen Wang, Hongzhi Cui
Summary: Core-double shell-structured ZnO@In2O3@ZnO microspheres were successfully synthesized by decorating In2O3 and ZnO on the surface of ZnO hollow microspheres, exhibiting excellent gas sensing properties with high response to gases like ethanol, especially at low concentrations. This superior gas sensing performance was attributed to its high specific surface area, abundant surface defects, and radial electronic modulation mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Lifang He, Jingjie Hu, Qiming Yuan, Zhangcheng Xia, Ling Jin, Hongliang Gao, Liyuan Fan, Xiangfeng Chu, Fanli Meng
Summary: Constructing porous and heterojunction structures within the semiconductor oxide composites is an ideal strategy for developing gas sensing materials, but it is difficult due to grain boundaries. In this study, ZnFe2O4/SnO2 (ZFO/SNO) composite with porous core-shell spheres structure was successfully synthesized by combining pre-synthesized SnO2 nanospheres with ZnFe2O4. The porous ZFO/SNO composite with a Zn to Sn ratio of 1:0.7 showed excellent acetone sensing performance, attributed to its rich heterojunctions, porous structure, and small nanoparticle size.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Environmental Sciences
Mengmeng Zhan, Chuanxin Ge, Shahid Hussain, Ali S. Alkorbi, Raiedhah Alsaiari, Nabil A. Alhemiary, Guanjun Qiao, Guiwu Liu
Summary: Timely detection of harmful, poisonous, and air pollutant gases is crucial for protecting humans from exposure to severe gas levels. Gas-sensing devices based on sphere-like porous SnO2/ZIF-8 nanocomposites provide high surface area, porosity, and active sites for excellent responses in metal oxide gas sensors. The engineered gas sensors show excellent sensing sensitivity, rapid response and recovery times, and favorable selectivity for NO2 gases. Therefore, NO2 gas sensors based on core-shell SnO2/ZIF-8 nanospheres have promising applications in industrial settings.
Article
Chemistry, Physical
Lin -Xi Shan, Yan Li, Ren-Cong Wang, Xiao-Xue Lian
Summary: Developing a TEA sensor is increasingly important for industrial production and life safety due to the poisonous and flammable characteristics of triethylamine. A novel ZnS@ZnO core-shell nanostructure with enhanced gas sensitivity and anti-humidity ability was prepared and showed promising application prospect in TEA detection.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Jae-Hun Kim, Ali Mirzaei, Jae Hoon Bang, Hyoun Woo Kim, Sang Sub Kim
Summary: The study investigated the effects of SnO2 shell thickness and operating voltage on the sensing behavior of WS2 nanosheets, finding that a 15 nm thick shell at 3.4 V was optimal for CO sensing, while a 30 nm thick shell was optimal for NO2 sensing. The engineering design principles can be used to selectively detect reducing gases like CO.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xue-Yan Wu, Li-Yuan Zhu, Jie Sun, Kai-Yue Zhu, Xiao-Yong Miao, Meng-Yang Liu, Xue-Feng Zhao, Hong-Liang Lu
Summary: Pt nanoparticle-modified SnO2-ZnO core-shell nanosheets have been synthesized via atomic layer deposition, hydrothermal method, and magnetron sputtering. These high-performance gas sensors exhibit high sensitivity, excellent selectivity, and low power consumption.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Ming Zhang, Ning Sui, Rui Wang, Tong Zhang
Summary: The gas-sensitive performance of Cr2O3-TiO2 core-shell fibers was enhanced by optimizing the thickness of TiO2 shell. The response of the fibers to acetone transitioned from p-type to n-type with increasing TiO2 shell thickness. The formation of Cr2O3-TiO2 heterojunction enabled the gas sensors to have short response and recovery time to the target gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
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
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
Materials Science, Multidisciplinary
Julakanti Shruthi, Nagabandi Jayababu, M. V. Ramana Reddy
Summary: Ag:Y2O3-SnO2 core-shell nanocomposites were fabricated for high-efficiency gas sensing applications, showing superior sensing performance and good stability towards low concentrations of ammonia. The sensor exhibited rapid response and recovery time, as well as increased sensitivity towards ammonia at room temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yuehao Fu, Hong Wang, Xiaohua Liu, Di Liu, Jiawei Wan, Shuaijun Hao, Qiang Zhang, Xingkuan Chen, Zhipeng Zen, Hong Xin
Summary: In this study, urchin-like core-shell In2O3/ZnO nanocomposites with mesoporous structure and high specific surface area were prepared via a facile solvothermal method. The sensor based on these nanocomposites showed excellent gas-sensing performance to triethylamine (TEA), attributed to the special urchin-like structure with mesoporous and high specific surface area, plentiful oxygen vacancies, and the formation of n-n heterojunction.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yunlong Xu, Lixin Que, Lei Lu, Jun Cao, Jingjing Wang, Yingying Zheng, Lei Shi, Chaorong Li, Jiaqi Pan
Summary: The CuI/SnO2/ZnO core-shell orderly nanoarrays transparent pn junction fabricated via hydrothermal-sputtering-iodize method exhibits high transmittance and photovoltaic conversion enhancement. This is mainly attributed to the SnO2 shell transition layer with appropriate Fermi level and wide band gap, as well as the carrier pathway provided by the SnO2/ZnO core-shell orderly nanoarrays.
MATERIALS TODAY COMMUNICATIONS
(2022)
