氧化锌/辉沸石复合光催化材料的制备及其性能

以七水硫酸锌为前驱体,天然辉沸石为载体,以直接沉积法制备了纳米氧化锌/辉沸石复合材料。结合XRD、BET和SEM等表征手段对样品的物相组成、孔结构特性及微观形貌做了检测分析,并且探究了不同氧化锌负载量及煅烧温度对纳米氧化锌/辉沸石复合材料降解亚甲基蓝性能的影响规律。结果表明：复合材料实现了六方铅锌矿相氧化锌与辉沸石的紧密复合与有效分散,且该复合结构能够有效抑制光生载流子的复合,改善材料的吸附性能,进而提高材料的光催化效率;当复合材料中氧化锌负载量为30%（氧化锌与沸石的质量比）、煅烧温度为300 ℃时,材料对亚甲基蓝的光催化性能最优。

Preparation and photocatalytic performance of ZnO/stellerite composite materials

Using ZnSO4·7H2O as precursor and stellerite as carrier,ZnO/stellerite photocatalytic composites were prepared by direct deposition.The phase compositions,aperture character and micromorphology of the as-prepared composites were characterized by XRD,BET and SEM,respectively.In addition,the effects of ZnO loading amounts and calcination temperatures on the degradation properties of methylene blue of nano-ZnO/stellerite photocatalytic composites were investigated.The results showed that the composite material realized the close combination and effective dispersion of hexagonal lead zinc oxide and pyroxene,and the composites′structure effectively inhibited the recombination of photogenerated-carrier,improved the adsorption performance and photocatalytic efficiency of the material.With 30%(mass ratio of ZnO to stellerite)ZnO loaded and calcination temperature of 300℃,the composite exhibited the best photocatalytic performance.