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Zn2SnO4-ZnO微米线的优化制备与氢气气敏特性
发表时间：2018-09-30 浏览量：1329 下载量：276
| 全部作者： | 朱丽佳，卢瑞，郦瀚森，沈岩柏 |
| 作者单位： | 东北大学资源与土木工程学院 |
| 摘 要： | 以SnO2、ZnO及活性炭的混合物为原料，镀金Si片为基板，采用碳热还原蒸发法优化制备Zn2SnO4-ZnO复合气敏材料。结构表征结果表明，反应温度为1 000℃、反应时间为1 h、原料物质的量配比为SnO2:ZnO:C=2:1:4、O2/Ar气体体积配比为3%，是获得结晶好、长径比高、产量大的Zn2SnO4-ZnO复合材料的最佳制备条件。气敏特性结果表明，Zn2SnO4-ZnO复合材料对H2表现出优良的气体响应-恢复特性，且响应和恢复时间较短；在工作温度为300℃时可获得对H2的最大灵敏度；随着H2浓度的增加，Zn2SnO4-ZnO复合材料对其灵敏度呈线性上升趋势。 |
| 关 键 词： | 无机非金属材料；气体传感器；热蒸发；Zn2SnO4-ZnO；H2 |
| Title： | Optimal synthesis and H2 sensing property of Zn2SnO4-ZnO microwires |
| Author： | ZHU Lijia, LU Rui, LI Hansen, SHEN Yanbai |
| Organization： | School of Resources and Civil Engineering, Northeastern University |
| Abstract： | Zn2SnO4-ZnO gas-sensing composites were synthesized by carbon thermal reduction evaporation method, where the mixture of SnO2, ZnO and active carbon powders were used as the source material, and Au-coated Si chips were used as the substrates. Microstructural characterization results showed that Zn2SnO4-ZnO composites with good crystallinity, large length-to-diameter ratio, and high yield were obtained under the optimal conditions of reaction temperature of 1 000℃, reaction time of 1 h, SnO2, ZnO and C with the molar ratio of 2:1:4, and O2/Ar with volume ratio of 3%. Gas-sensing properties demonstrated that Zn2SnO4-ZnO composites showed significant H2 sensing properties with short response and recovery times. The highest response of Zn2SnO4-ZnO composites to H2 was found at an operating temperature of 300℃. The response of Zn2SnO4-ZnO composites to H2 increased linearly with increasing H2 concentrations. |
| Key words： | inorganic nonmetallic materials; gas sensor; thermal evaporation; Zn2SnO4-ZnO; H2 |
| 发表期数： | 2018年9月第18期 |
| 引用格式： | 朱丽佳，卢瑞，郦瀚森，等. Zn2SnO4-ZnO微米线的优化制备与氢气气敏特性[J]. 中国科技论文在线精品论文，2018，11（18）：1814-1822. |
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