Facile metal-organic frameworks-templated fabrication of hollow indium oxide microstructures for chlorine detection at low temperature

被引：76

作者：

Ma, Jiangwei ^{[1
]}

Fan, Huiqing ^{[1
,2
,3
]}

Zheng, Xiaokun ^{[1
]}

Wang, Hao ^{[1
]}

Zhao, Nan ^{[1
]}

Zhang, Mingchang ^{[1
]}

Yadav, Arun Kumar ^{[1
]}

Wang, Weijia ^{[1
]}

Dong, Wenqiang ^{[2
]}

Wang, Shuren ^{[3
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, 127 Youyixi Rd, Xian 710072, Peoples R China

[2] Northwestern Polytech Univ, Inst Culture & Heritage, Xian 710072, Peoples R China

[3] Henan Polytech Univ, Int Joint Res Lab Henan Prov Underground Space De, Jiaozuo 454003, Henan, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2020年 / 387卷

关键词：

In2O3; MIL-68 (In); Rods; Gas-sensing; Cl-2; STRUCTURES HYDROTHERMAL SYNTHESIS; SOLID-STATE SYNTHESIS; HARD-TEMPLATE; GAS; MICROSPHERES; SURFACE; NANOPARTICLES; NANOSHEETS; YEAST;

D O I：

10.1016/j.jhazmat.2020.122017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Metal oxides with the hollow microstructure by the facile synthetic strategy are hopeful in applications for photocatalysis, supercapacitor, and gas sensor owing to their large surface areas, porosity ratio and rich active sites. In this work, indium oxide porous hollow rods (In2O3 PHRs) are successfully prepared using metal-organic frameworks (MOFs) as the template. The morphology of In2O3 PHRs is hexagonal hollow micro-rods with a porous structure. The investigation on the gas-sensing performance reveals that the In2O3 PHRs sensor displays outstanding sensitivity and selectivity toward 10 ppm chlorine gas (Cl-2) at low operational temperature (160 degrees C). Furthermore, the In2O3 PHRs sensor displays a low detection limit (3.2 ppb) and short response and recovery time (38/13 s). The unique morphology and abundant oxygen vacancies are conduced to the excellent gas-sensing activities, which is benefited from the utilization and decomposition of In-MOFs precursor. In addition, the gas sensing mechanism of reducing gases and oxidizing gases is deduced in detail for the In2O3 PHRs sensor.

引用

页数：9

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[1] Investigation on ozone-sensitive In2O3 thin films [J].