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载体对负载型TiO_2光催化性能的影响
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摘要
本文选择了经过提纯加工的非金属硅质多孔矿物白炭黑、硅藻土助滤剂、蛋白土为载体,制备了Ti02/多孔矿物复合光催化材料。通过正交试验和单因素试验,获得了制备Ti02/白炭黑、Ti02/硅藻士助滤剂、Ti02/蛋白土三种复合光催化材料的优化工艺条件。从相同负载量、煅烧温度和最优工艺条件及对罗丹明B的降解过程等方面,比较了载体对Ti02硅质载体复合材料的光催化性能的影响。应用XRD、SEM、TEM、AFM、FT-IR、XPS及LC-MS等多种现代分析表征手段,揭示了载体在催化剂制备过程中影响复合光催化材料性能的规律;初步明晰了载体晶型、结构、表面化学等影响复合光催化材料性能的“构效”关系。
The non-metallic porous amorphous silic minerals including porous amorphous silicon, diatomite filter aid and opal as supporter were prepared the photocatalytic composite materials of TiO2/minerals. Through orthogonal experiments and one-factor experiments, the optimization conditions for preparation of Ti02/porous amorphous silicon, TiO2/diatomite filter aid and Ti02/opal were obtained. Under conditions of same amount of supporter, calcination temperature and the degradation of rhodamine B, the influences of supporter types on the photocatalytic capability of TiO2/minerals material were analyzed by examinations and tests in many aspects. The compound of the the degradation mixture of rhodamine B, minerals composition and component, structure, topography, surface functional group and surface elements were analyzed by LC-MS, XRD, SEM, TEM, AFM, FT-IR and XPS, besides, the difference properties and the effect mechanism on the photocatalytic capability of these three photocatalytic composite materials were compared and investigated.
引文
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