Abstract

Nanosized materials based on tin dioxide with platinum additives were synthesized to create gas sensitive layers of semiconductor hydrogen sensors. Synthesis of the nanomaterials was carried out by a sol–gel method using ethylene glycol as a solvent. Influence of platinum additives on sensitivities of the obtained sensors to H₂ and catalytic properties of the corresponding Pt-containing sensor nanomaterials in a reaction of H₂ oxidation were studied. It was shown that the sensor properties depended on catalytic processes of H₂ oxidation on the sensor surfaces. The most sensitive hydrogen sensor was obtained by impregnation of SnO₂ with solution of 15.3 × 10⁻²mol×L⁻¹ H₂PtCl₆ and demonstrated a fast response time (8 s) and quick recovery time (10 s) at the optimal sensor temperature 260 ^oC.

摘要

合成了基于二氧化锡和铂添加剂的纳米材料，以创建半导体氢传感器的气敏层。纳米材料的合成采用溶胶-凝胶法，以乙二醇为溶剂。研究了铂添加剂对所得传感器对H _{2 的}敏感性和相应含Pt 传感器纳米材料在H ₂氧化反应中的催化性能的影响。结果表明，传感器特性取决于传感器表面上H ₂氧化的催化过程。通过用15.3 × 10 ^-2 mol × L ^-1 H溶液浸渍 SnO ₂获得最灵敏的氢传感器₂ PtCl ₆并在最佳传感器温度 260 ^o C下展示了快速响应时间 (8 s) 和快速恢复时间 (10 s) 。