Enhanced NO2 Sensing Performance of ZnO-SnO2 Heterojunction Derived from Metal-Organic Frameworks

被引：19

作者：

Ren, Xiaowei ^{[1
]}

Xu, Ze ^{[1
]}

Zhang, Zhongtai ^{[1
]}

Tang, Zilong ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

NANOMATERIALS | 2022年 / 12卷 / 21期

基金：

中国国家自然科学基金;

关键词：

NO2 gas sensor; ZnO; SnO2; heterojunction; MOFs derivatives; GAS; ZNO; SENSOR; NANOSTRUCTURES; ARRAYS;

D O I：

10.3390/nano12213726

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nitrogen dioxide (NO2) is the major reason for acid rain and respiratory illness in humans. Therefore, rapid, portable, and effective detection of NO2 is essential. Herein, a novel and simple method to construct a ZnO-SnO2 heterojunction is fabricated by pyrolysis of bimetallic metal organic frameworks. The sensitivity of ZnO-SnO2 heterojunction towards 0.2 ppm NO2 under 180 degrees C is 37, which is 3 times that of pure ZnO and SnO2. The construction of heterojunction speeds up the response-recovery process, and this kind of material exhibits lower detection limit. The construction of heterojunction can significantly improve the NO2 sensitivity. The selectivity, stability, and moisture resistance of ZnO-SnO2 heterojunction are carried out. This could enable the realization of highly selective and sensitive portable detection of NO2.

引用

页数：12

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