A Simple Absorbent Cotton Biotemplate to Fabricate SnO2 Porous Microtubules and Their Gas-Sensing Properties for Chlorine

被引：54

作者：

Ma, Jiangwei ^{[1
]}

Fan, Huiqing ^{[1
]}

Ren, Xiaohu ^{[1
]}

Wang, Chao ^{[1
]}

Tian, Hailin ^{[1
]}

Dong, Guangzhi ^{[1
]}

Wang, Weijia ^{[1
]}

机构：

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

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2019年 / 7卷 / 01期

关键词：

Gas sensor; SnO2; Porous microtubules; Absorbent cotton; Biotemplate; Cl-2; TIN OXIDE; HIERARCHICAL SNO2; SURFACE-MODIFICATION; IN2O3; NANOPARTICLES; SENSORS; NANOSTRUCTURES; MICROSPHERES; NANOTUBES; NANOWIRES;

D O I：

10.1021/acssuschemeng.8b02235

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

SnO2 porous microtubules (PMs) were synthesized by a two-step immersion-calcination-method, and absorbent cotton is used as the biotemplate. This method is simple, eco-friendly, and cost-efficient. The absorbent cotton as a biotemplate not only supported the formation of microtubule-like structures but also provided a hypoxia atmosphere to introduce oxygen vacancies in the calcination process. The as-synthesized SnO2 PMs maintain the morphology of absorbent cotton long, curly, and twisted. The gas-sensing property of the SnO2 PMs sensor was systematically investigated for detection of chlorine (Cl-2). On the basis of such porous microtubules, the sensor exhibited excellent sensitivity and selectivity to Cl-2 at 200 degrees C. Compared with SnO2 particles, the gas response (R-gas/R-air) of the SnO2 PMs sensor to 10 ppm of Cl-2 at 200 degrees C was increased about 100 times. Finally, the enhanced gas-sensing performance was associated with the hollow morphology of SnO2 PMs and the formation of abundant oxygen vacancies because of the decomposition of absorbent cotton.

引用

页码：147 / 155

页数：17

共 57 条

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