Construction of hollow NiO/ZnO p-n heterostructure for ultrahigh performance toluene gas sensor

被引：36
|
作者：
Liu, Hongyan [1 ]
Wang, Ziyan [1 ]
Cao, Guanlong [2 ]
Pan, Guofeng [1 ]
Yang, Xueli [1 ]
Qiu, Meiyan [4 ]
Sun, Caixuan [1 ]
Shao, Junkai [1 ]
Li, Zhenhua [1 ]
Zhang, Hao [3 ]
机构：
[1] Hebei Univ Technol, Sch Elect & Informat Engn, Tianjin Key Lab Elect Mat & Devices, 5340 Xiping Rd, Tianjin 300401, Peoples R China
[2] Hebei Univ Technol, Technol Transfer Ctr, Tianjin 300401, Peoples R China
[3] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
[4] Tianjin Sino German Univ Appl Sci, Tianjin 300350, Peoples R China
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2022年 / 141卷
基金：
中国国家自然科学基金;
关键词：
NiO/ZnO composites; Hollow microspheres; Toluene; p-n heterostructure; Gas sensor; SENSING PROPERTIES; HYDROTHERMAL SYNTHESIS; ELECTROSPUN NANOFIBERS; ZNO HETEROJUNCTION; NIO NANOPARTICLES; CO3O4; FABRICATION; AU; MICROFLOWERS; MICROSPHERES;
D O I：
10.1016/j.mssp.2021.106435
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this work, NiO/ZnO hollow microspheres were successfully fabricated by a simple co-precipitation method. The structural and morphological properties of NiO/ZnO composites were studied by various characterization methods. Gas sensing results revealed that the sensor of NZ-2 and the working temperature was 300 degrees C showed highest response value (S = 240) and good selectivity to 100 ppm toluene. Compared with pure ZnO hollow microspheres, the sensitivity of NiO/ZnO hollow microspheres is significantly improved by about 20 times. The response/recovery time were 2/33 s respectively at the same time, the detection limit can be reduced to ppb level. The possible mechanism for improvement of gas sensing performance is detailly analyzed, which is mainly due to the unique hierarchical microstructure and the composition of p-n heterojunction at the contact surface between p-type NiO and n-type ZnO structures as well as the catalytic effect of NiO.
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页数：10
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