Fabrication and characterization of SiO2@TiO2@silicalite-1 catalyst and its application for degradation of rhodamine B. Issue 107 (7th November 2016)

• Record Type: Journal Article
• Authors: Yang, Xiaobing; Gan, Chuanhai; Xiong, Huaping; Huang, Liuqing; Luo, Xuetao
• Is Part Of: RSC advances. Volume 6:Issue 107(2016)
• Page Start: 105737
• Page End: 105743
• Publication Date: 2016-11-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra23883a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : SiO2 @TiO2 @silicalite-1 catalyst, with TiO2 (Degussa P25) nanoparticles encapsulated by SiO2 and adhered on the surface of silicalite-1 zeolite, was successfully fabricated by combining pressing, sintering and infiltration methods. Abstract : SiO2 @TiO2 @silicalite-1 catalyst, with TiO2 (Degussa P25) nanoparticles encapsulated by SiO2 and adhered on the surface of silicalite-1 zeolite, was successfully fabricated by combining pressing, sintering and infiltration methods. The samples were characterized by XRD, SEM, FT-IR, TEM, nitrogen sorption, and UV-vis diffuse reflectance spectra. The photocatalytic properties were investigated by degradation of rhodamine B (RhB) aqueous solution under UV light. The results show that TiO2 nanoparticles are coated with a SiO2 shell and bonded together. The core/shell structure of TiO2 @SiO2 is attached to the surface of silicalite-1 particles. The photocatalytic efficiency of TiO2 @silicalite-1 is 97.4%. When the catalyst is coated with SiO2, its photocatalytic efficiency is significantly improved to 99.7%. Furthermore, the rate of degradation using SiO2 @TiO2 @silicalite-1 is 1.54 times faster than that using TiO2 @silicalite-1.