Enhancing performances of a resistivity-type hydrogen sensor based on Pd/SnO2/RGO nanocomposites
Enhancing performances of a resistivity-type hydrogen sensor based on Pd/SnO2/RGO nanocomposites
复制标题
增强基于 Pd/SnO2/RGO 纳米复合材料的电阻率型氢传感器的性能
DOI：
10.1088/1361-6528/aa6a96
复制
发表时间：
2017
期刊：
影响因子：
3.5
通讯作者：
Li Cong
中科院分区：
文献类型：
--
作者：
Peng Yitian;Zheng Lulu;Zou Kun;Li Cong
采用两步还原法制备了Pd/SnO 2/还原氧化石墨烯（RGO）纳米复合材料。将Pd/SnO 2/RGO纳米复合材料置于一对金电极上，制备了一种新型的Pd/SnO 2/RGO纳米复合材料氢气传感器。Pd/SnO 2/RGO纳米复合材料传感器对H2的响应比Pd/RGO高，这是因为SnO 2纳米颗粒的引入增强了H2的吸附，并与RGO形成了P-N结。由于Pd和SnO 2纳米粒子的组合效应，该传感器具有55%~ 10 000 ppm H2的高响应、低检测限、快速响应、良好的选择性和重复性。该研究为石墨烯基气体传感器的巨大应用提供了一种新的策略。
Palladium/tin oxide/reduced graphene oxide (Pd/SnO2/RGO) nanocomposites with Pd and SnO2 crystalline nanoparticles of high density and uniformity coated on RGO have been synthesized by a two-step reduction process. A novel hydrogen (H2) sensor based on Pd/SnO2/RGO nanocomposites was fabricated by placing Pd/SnO2/RGO nanocomposites onto a pair of gold electrodes. The Pd/SnO2/RGO nanocomposite-based sensor exhibited higher responses than Pd/RGO to H2 because the introduction of SnO2 nanoparticles enhances H2 adsorption and forms a P–N junction with RGO. The sensor shows a high response of 55% to 10 000 ppm H2, and a low detection limit, fast response, good selectivity and repeatability due to a combination effect of the Pd and SnO2 nanoparticles. The studies provide a novel strategy for great potential applications of graphene-based gas sensors.