【摘要】 为了研究ZSM-5分子筛中硅铝物质的量比变化对TiO₂/ZSM-5光催化性能的影响，通过水热合成法制备了5种不同硅铝比的ZSM-5分子筛，并以此为载体通过浸渍-煅烧法制备了TiO₂/ZSM-5复合材料。对制备材料的物化性能以及光电学性能进行了分析，并对光催化实验中的活性组分进行了研究。结果表明：当ZSM-5分子筛中硅铝物质的量比为120时，制备的TiO₂/ZSM-5复合材料吸附性较好，负载TiO₂后光响应程度最高，光生电子（e^-）和空穴（h⁺）复合率低且电阻最小，紫外光照100 min时罗丹明B（Rh-B）的降解率为99.6%,TOC去除率为60.4%。同时，实验发现羟基自由基（·O₂^-）是光催化反应过程中的主要活性组分。更多还原

【Abstract】 Variation of silicon-aluminum ratios in ZSM-5 will affect ZSM-5 zeolite properties.In order to study silicon-aluminum ratio effects of ZSM-5 zeolites on photocatalytic performance of TiO₂/ZSM-5,five ZSM-5 zeolites with different silicon-aluminum ratios were prepared by a hydrothermal synthesis method,and TiO₂/ZSM-5 composite materials were prepared via impregnation-calcination.The physical,chemical and photoelectric properties of the prepared materials were analyzed and active components in photocatalytic reactions were studied.The results show that the TiO₂/ZSM-5 composite has better absorbability,highest photo response and lower recombination rate of photo-generated e^- and h⁺,when the silicon-aluminum ratio is 120.The degradation rate of Rhodamine B （Rh-B） was 99.6% and the TOC degradation rate was 60.4% when exposed to ultraviolet light for 100 min.Meanwhile,·O₂^- was found as the main active component in the photocatalytic reaction.更多还原