HZSM-5分子筛负载SrTiO_3光催化降解活性艳红X-3B

采用溶胶-凝胶法制备HZSM-5分子筛负载SrTiO_3,对其进行XRD、FTIR和N2吸附-脱附表征,研究负载对活性艳红X-3B光催化降解过程的影响。通过分析降解液的FTIR谱图、紫外-可见光谱和总有机碳(TOC)数据,对活性艳红X-3B的光催化降解过程进行了探讨。结果表明:催化剂的主要成分为钙钛矿结构SrTiO_3,负载对SrTiO_3晶粒尺寸几乎没有影响。纯SrTiO_3没有明显的孔结构,负载后样品的比表面积和孔隙主要由HZSM-5提供。负载之后催化剂的降解活性显著提高,30%SrTiO_3/HZSM-5对活性艳红X-3B染料溶液的脱色和TOC去除速率最快。

Photocatalytic degradation of reactive brilliant red X-3B on SrTiO3 supported on HZSM-5 molecular sieve

SrTiO₃ was supported on HZSM-5 molecular sieve by sol-gel method. XRD, FTIR, and N₂ adsorption-desorption measurements were carried out to study the influences of supporting on photocatalytic degradation process of reactive brilliant red X-3B. The processes in photocatalytic degradation of reactive brilliant red X-3B were discussed after analyzing the data of FTIR spectra, ultraviolet-visible spectroscopy, and total organic carbon (TOC) data of the solutions during degradation. The results show that the photocatalysts are mainly composed of perovskite SrTiO₃. Crystallite size of SrTiO₃ has nearly no change after supporting. Pure SrTiO₃ does not have apparent porous structure, so that specific surface area and pores of the supported samples are mainly provided by HZSM-5. Photocatalytic activity of the supported catalysts is obviously improved with the fastest decoloration and TOC removal rates on 30% SrTiO₃/HZSM-5 for reactive brilliant red X-3B.