High-Energy Faceted SnO2-Coated TiO2 Nanobelt Heterostructure for Near-Ambient Temperature-Responsive Ethanol Sensor

被引：72

作者：

Chen, Guohui ^{[1
]}

Ji, Shaozheng ^{[1
]}

Li, Haidong ^{[1
]}

Kang, Xueliang ^{[1
]}

Chang, Sujie ^{[1
]}

Wang, Yana ^{[1
]}

Yu, Guangwei ^{[1
]}

Lu, Jianren ^{[3
]}

Claverie, Jerome ^{[4
]}

Sang, Yuanhua ^{[1
]}

Liu, Hong ^{[1
,2
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China

[2] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100864, Peoples R China

[3] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Shandong, Peoples R China

[4] Univ Quebec, Dept Chem, NanoQAM Res Ctr, Montreal, PQ H3C 3P8, Canada

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 44期

基金：

中国国家自然科学基金;

关键词：

high energy facet; SnO2; nanoplates; room temperature sensor; ethanol; TiO2; nanobelts; heterostructure; GAS-SENSING PROPERTIES; CHEMICAL-VAPOR-DEPOSITION; VISIBLE-LIGHT; SNO2; NANOPARTICLES; GROWTH; SN3O4; NO2; CO; NANOSTRUCTURES; PHOTOCATALYST;

D O I：

10.1021/acsami.5b08630

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A SnO2 gas sensor was prepared by a two-step oxidation process whereby a Sn(II) precursor was partially oxidized by a hydrothermal process and the resulting Sn3O4 nanoplates were thermally oxidized to yield SnO2 nanoplates. The SnO2 sensor was selective and responsive toward ethanol at a temperature as low as 43 degrees C. This low sensing temperature stems from the rapid charge transport within SnO2 and from the presence of high-energy (001) facets available for oxygen chemisorption. SnO2/TiO2 nanobelt heterostructures were fabricated by a similar two-step process in which TiO2 nanobelts acted as support for the epitaxial growth of intermediate Sn3O4. At temperatures ranging from 43 to 276 degrees C, the response of these branched nanobelts is more than double the response of SnO2 for ethanol detection. Our observations demonstrate the potential of low-cost SnO2-based sensors with controlled morphology and reactive facets for detecting gases around room temperature.

引用

页码：24950 / 24956

页数：7

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