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负载型氧化铁对高毒气体PH3的催化分解

Keywords: 氧化铁,碳纳米管,磷化物,磷化氢催化分解

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Abstract:

采用沉积-沉淀法制备了碳纳米管(CNTs)和二氧化硅(SiO2)负载的纳米Fe2O3催化剂,将其应用于高毒气体PH3分解反应。通过XRD,TEM,XPS,BET等一系列检测手段,对制备样品的相结构、形貌、组分和比表面积进行了表征。研究结果表明,在PH3催化分解反应过程,极少量的产物P迁移至Fe2O3中,形成金属磷化物FeP作为反应的活性相。与Fe2O3/SiO2相比,Fe2O3/CNTs显示了较高的催化性能。在440℃反应温度下,Fe2O3/CNTs对PH3分解率达到99.8%。CNTs作为催化剂载体的优秀性能可归因于CNTs良好的导电性能和活性组分在其上的高度分散。

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