rGO modified nanoplate-assembled ZnO/CdO junction for detection of NO2

被引：72

作者：

Bai, Shouli ^{[1
]}

Sun, Xi ^{[1
]}

Han, Ning ^{[2
]}

Shu, Xin ^{[1
]}

Pan, Junli ^{[3
]}

Guo, Haipeng ^{[4
]}

Liu, Shuanghe ^{[4
]}

Feng, Yongjun ^{[1
]}

Luo, Ruixian ^{[1
]}

Li, Dianqing ^{[1
]}

Chen, Aifan ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing Key Lab Environmentally Harmful Chem Anal, Beijing 100029, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

[3] Jiangsu Univ Technol, Sch Chem & Environm Engn, Changzhou 213001, Peoples R China

[4] Fengfan Co Ltd, 8 Fuchang Rd, Baoding City 071057, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2020年 / 394卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Gas sensor; ZnO/CdO; Graphene; rGO; NO2; ZNO NANOPARTICLES; FACILE SYNTHESIS; GAS; MICROSPHERES; PERFORMANCE;

D O I：

10.1016/j.jhazmat.2019.121832

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The triadic composite of ZnO/CdO heterojunction decorated with reduced graphene oxide (rGO) was prepared using a one-step hydrothermal method. The characterizations of morphology, structure and composition to the composite were undertaken by XRD, Raman, SEM, TEM, XPS, UV-vis spectra. The sensing experimental data indicate that the highest response of the ZnO/CdO/rGO (1.0 wt%) composite to ppm-level NO2 is 8 times and 2 times higher than pure ZnO and ZnO/CdO junction, respectively. The composite not only exhibits fast response time and recovery time, high response, but also reveals outstanding stability and repeatability at an operating temperature of 125 degrees C. The sensing mechanism also has been discussed in detail in the work. The enhancement in gas sensing properties is credited to the development of ZnO/CdO heterojunction and the decoration of rGO with high conductivity. The logarithm of sensitivity in the range of 0.4-2.4 ppm NO2 shows good linear dependence, indicating that the composite based sensor can be used to quantificationally detect low concentration of NO2.

引用

页数：9

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