Facile synthesis of In2O3 nanoparticles for sensing properties at lowdetection temperature
Facile synthesis of In2O3 nanoparticles for sensing properties at lowdetection temperature
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轻松合成 In2O3 纳米颗粒，用于低检测温度下的传感特性
DOI：
10.1016/j.snb.2016.05.082
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
M. Z. Zhang
中科院分区：
文献类型：
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作者：
B. X. Xiao;F. Wang;C. B. Zhai;P. Wang;C. H. Xiao;M. Z. Zhang
In2O3 纳米颗粒是通过简单的溶剂热法在相当低的温度 (100 °C) 下成功制备的，无需任何模板或表面活性剂。各种物理表征的结果表明，溶剂热前驱体是不规则形状的，所制备的 In2O3 样品是由煅烧后具有独特直径 (20–30 nm) 的均匀纳米颗粒构成的。进行随时间变化的实验以了解煅烧过程中的形态演变。 In2O3 纳米粒子作为新型气体传感器，在相当低的工作温度 (60 °C) 下表现出快速、高响应以及对 ppb 级 NO2 气体的良好选择性。初步用吸附-解吸机理和化学动力学理论解释了传感过程。
In2O3nanoparticles are successfully prepared via a facile solvothermal method without any templates or surfactants at a rather low temperature (100 °C). The results of various physical characterizations revealed that the solvothermal precursor is irregular-shaped and the as-prepared In2O3samples are constructed from uniform nanoparticles with unique diameter (20–30 nm) after calcining. Time-dependent experiment was carried out to understand morphology evolution during the calcining process. The In2O3nanoparticles as novel gas sensors exhibit fast and high response as well as good selectivity toward NO2gas at ppb level at a rather low operating temperature (60 °C). The sensing process is tentatively explained in terms of the adsorption-desorption mechanism and chemical kinetics theories.