Enhanced formaldehyde sensing properties of SnO2 nanorods coupled with Zn2SnO4
Enhanced formaldehyde sensing properties of SnO2 nanorods coupled with Zn2SnO4
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SnO2 纳米棒与 Zn2SnO4 结合增强甲醛传感性能
DOI：
10.1039/c5ra01887k
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发表时间：
2015-05
期刊：
影响因子：
3.9
通讯作者：
Yude Wang
中科院分区：
文献类型：
--
作者：
Bingqian Han;Dongyang Deng;Xiaoyan Cai;Yude Wang
采用一步水热合成法将三元氧化物Zn 2SnO 4引入棒状纳米结构SnO 2气敏元件中，制备了用于甲醛检测的SnO 2气敏元件。研究了Zn 2SnO 4添加剂对SnO 2结构、形貌及气敏性能的影响。据证实，在前体溶液中的Zn量的控制是有效的，在实现良好发展的一维和二维共存结构的SnO 2-Zn 2SnO 4（SnZn）纳米复合材料。测试了SnZn复合材料对甲醛气体的气敏性能。结果表明，SnO 2粉体中Zn 2SnO 4物种的存在可以有效地提高传感器的电导率，降低传感器的最佳工作温度，改善传感器的气体响应。在相对较低的操作温度162 °C下，在35at%Zn2SnO4纳米片与SnO 2纳米棒（SnZn 35）的分级支化结构偶联的情况下，复合物表现出对HCHO的最高响应。SnZn 35复合材料的良好气敏性能可以归因于较小的颗粒尺寸，较大的表面积和更多的吸附Ox−物种，这些都有利于气体扩散和传感反应。本工作为二元-三元氧化物复合材料气敏元件的制备提供了很大的潜力，可进一步应用于室内污染检测。
Ternary oxide Zn2SnO4 was introduced to a rod-like nanostructured SnO2 gas sensor for formaldehyde detection by a facile one-step hydrothermal synthesis. The effects of the Zn2SnO4 additive on the structure, morphology and gas-sensing property of SnO2 were investigated in this study. It was confirmed that control of the Zn amounts in the precursor solution was effective in realizing well-developed one- and two-dimensional coexisting structured SnO2–Zn2SnO4 (SnZn) nanocomposites. The gas sensing properties of the resulting SnZn composites to HCHO vapor were tested. The results showed that the presence of Zn2SnO4 species in SnO2 powders could effectively enhance electrical conductivity, reduce optimal operating temperature and improve the gas response of the sensors. The composite exhibited the highest response towards HCHO in the case of 35 at% Zn2SnO4 nanoplates coupling with hierarchical branched structures of SnO2 nanorods (SnZn35) at a relatively lower operating temperature of 162 °C. The good gas-sensing performance of the SnZn35 composite can be ascribed to the smaller particle size, the larger surface area and the more absorbed Ox− species, which all are favorable for gas diffusion and sensing reactions. This work renders great potential in the fabrication of gas sensors using a binary–ternary oxide composite, which can be further applied in indoor pollution detection.
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影响因子：
4.6
作者：
Zhou-guang Lu;You-gen Tang
通讯作者：
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影响因子：
8.6
作者：
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影响因子：
8.4
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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