硫化镉-二氧化钛/分子筛复合光催化材料制备及性能研究

摘要/Abstract

摘要：

将水热法制备的二氧化钛负载在分子筛上,再与硫化镉复合,制备了硫化镉-二氧化钛/分子筛复合材料。对复合材料的相组成、微观结构、形貌和光谱性质进行了表征。在可见光照射下,以光催化降解亚甲基蓝为探针反应,研究了复合材料的光催化活性。结果表明：与纯二氧化钛相比,二氧化钛/分子筛具有更快的吸附降解效率;与二氧化钛/分子筛、硫化镉/分子筛相比,硫化镉-二氧化钛/分子筛复合材料的光催化性能最为优越。硫化镉-二氧化钛/分子筛优化制备条件：硫化镉溶液质量浓度为2.0 g/L、反应温度为80 ℃,反应时间为4 h。

关键词: 硫化镉-二氧化钛/分子筛复合材料, 催化剂, 光催化活性

Abstract:

The TiO₂ prepared by hydrothermal synthesis was loaded on the molecular sieve and compounded with CdS to prepare the CdS-TiO₂/zeolite composite.The phase composition,microstructure,morphology and spectral properties of the composites were characterized.The photocatalytic activity of the composite material was evaluated by photo-catalytic degradation of methylene blue as the probe reaction under visible light irradiation.The results showed that the TiO₂/zeolite composite catalysts had faster photo-catalytic activity than that of pure TiO₂ powders.Compared with the TiO₂/zeolite and CdS/zeolite, the CdS-TiO₂/zeolite composite catalysts had the best photo-catalytic activity.The optimal conditions of producing CdS-TiO₂/zeolitewere as follows: the mass concentration of CdS was 2.0 g/L,the water bath temperature was 80 ℃ and the reaction time was 4 h.

Key words: CdS-TiO₂-zeolite composite, catalyst, photo-catalytic activity

中图分类号:

TQ134.11

徐元盛,李建伟,马炎,李国旺,张茂亮,单雪强. 硫化镉-二氧化钛/分子筛复合光催化材料制备及性能研究[J]. 无机盐工业, 2019, 51(6): 83-87.

Xu Yuansheng,Li Jianwei,Ma Yan,Li Guowang,Zhang Maoliang,Shan Xueqiang. Study on preparation and property of CdS-TiO₂/zeolite composite catalysts[J]. Inorganic Chemicals Industry, 2019, 51(6): 83-87.

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样品	比表面积/ （m²·g^-1）	表观常数/ min^-1	晶粒大小/ nm
TiO₂	91.34	0.009 4	19.58
TiO₂/分子筛	122.73	0.015 2	15.42
CdS/分子筛	127.65	0.014 8	15.11
CdS-TiO₂/分子筛	137.45	0.016 6	16.93

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