以天然沸石粉末作为基本原料,利用泡沫塑料浸渍法制得了宏观孔隙在毫米级尺度的网状多孔陶瓷基体.通过控制浆料涂覆过程和烧结条件,可以获得体密度<1 g/cm3而漂浮于水面的轻质陶瓷制品.采用溶胶-凝胶法在该多孔陶瓷表面负载TiO2薄膜,将TiO2薄膜的光催化性能与轻质多孔陶瓷的低密度、高比表面积等优势结合起来以提高体系的整体催化效果.对甲基橙溶液的光催化降解研究表明,负载过程中TiO2溶胶膜层从室温以1.5 ℃/min的速度升温至400 ℃保温30 min而得到的复合体具有优良的光催化性能.将本制品用于浓度为20 mg/L的甲基橙溶液的紫外照射处理,降解率可以达到99%以上.%The natural zeolite powder was used as the main raw material to produce a reticular porous ceramic with millimeter-sized pores by the polymer foam impregnation method.Controlling the slurry coating on the polymer foam and the sintering conditions could obtain the lightweight ceramic product with the bulk density below 1 g/cm3 to float on the water.A thin TiO2 film on the porous ceramic surface was prepared by sol-gel method, so the photocatalytic property of the TiO2 film could be combined with the low density and high specific surface area of this porous ceramic to improve the catalytic performance of the system.Study on the photocatalytic degradation of methyl orange solution showed that the composite, of which the titanium dioxide sol film was heated at 1.5℃/min to 400℃ and then kept the temperature for 30 min in the process of loading, has a quite excellent photocatalytic performance.This product was used for ultraviolet irradiation treatment of the 20 mg/L methyl orange solution, resulting in a degradation rate more than 99%.
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