Fe_(2)O_(3)/C复合材料的制备及其光催化降解性能研究

Preparation of Fe_(2)O_(3)/C Composites and Their Photocatalytic Degradation Performance

水污染给环境造成极大的负担,如何构建合适的催化剂降解有机污染物成为研究的热点。本文主要围绕氧化铁/碳纳米复合材料的可控合成、表征及其在催化降解有机污染物应用方面展开研究。通过盐模版法合成了氧化铁/碳复合材料,并对材料进行了TEM、XRD、XPS和BET等表征。合成的纳米复合材料用作催化剂分解有机染料罗丹明B(RhB),UV-vis测试染料浓度变化来研究材料的光催化活性。结果表明,Fe_(2)O_(3)/C(50g salt)的催化活性是最佳的。羟基自由基(HO•)是主要的反应物种,增强的催化活性可归因于稳定的微观结构和优选的结晶相。结果表明氧化铁/碳复合材料在光催化领域具有一定的应用潜力。

Water pollution is a significant burden to the environment,and the construction of suitable catalysts for the degradation of organic pollutants has become a hot research topic.This thesis focuses on the controlled synthesis and characterization of iron oxide/carbon nanocomposites and their application in the catalytic degradation of organic pollutants.The iron oxide/carbon composites were synthesized by the salt stencil method and characterized by TEM,XRD,XPS and BET.The nanocomposites were used as catalysts to decompose the organic dye Rhodamine B(RhB).The photocatalytic activity of the materials was investigated by UV-vis testing for changes in dye concentration.The results showed that the catalytic activity was optimal for Fe_(2)O_(3)/C(50g salt).Hydroxyl radicals(HO·)were the main reactive species,and the enhanced catalytic activity could be attributed to the stable microstructure and the preferred crystalline phase.The results indicate the potential of iron oxide/carbon composites for applications in photocatalysis.