以凹凸棒为载体,采用共沉淀法和热解法制备了新型凹凸棒负载碳-铁复合材料。通过X射线衍射仪、傅里叶变换红外光谱仪、冷场发射扫描电子显微镜、X射线光电子能谱仪、热重分析仪对复合材料进行表征,用亚甲基蓝水溶液模拟有机染料废水,考察复合材料在光暗体系下非均相Fenton催化降解亚甲基蓝的性能。结果表明,光照和暗环境下,最佳pH分别为4.0、3.5,反应120min时脱色率分别可达99.6%和96.3%。复合材料在光照环境下具有更好的催化活性,循环5次后,亚甲基蓝的脱色率仍可达99%,总有机碳去除率为42.2%,表现出良好的重复使用性。
A novel carbon-iron loaded on attapulgite composite was prepared by co-precipitation method and pyrolysis method using attapulgite as a carrier.The material was characterized by XRD,FT-IR,cold field emission SEM,XPS and TG.The methylene blue aqueous solution was used to simulate organic dye wastewater to investigate the catalytic degradation performance of methylene blue by heterogeneous Fenton in light and dark systems.The results showed that the optimal reaction pH values were 4.0 and 3.5 under visible light and dark conditions,respectively,with decolorization rates of 99.6% and 96.3% after 120min of reaction.The composite material had better catalytic activity in visible light environment.After 5 cycles,the decolorization rate of methylene blue could still reach 99% and the TOC removal rate was 42.2%,showing good reusability.
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基金资助
国家自然科学基金地区项目(32060549)
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