Tổng hợp, đặc trưng cấu trúc vật liệu xCu-30Ti-SBA-15 và ứng dụng làm xúc tác phân hủy phenol trong môi trường nước

Abstract

The ordered mesoporous catalytic materials xCu-30Ti-SBA-15 synthesized by sol-gel method, using Cu(NO₃)₂, tetra isopropyl orthotitanate (TIOT) as precursors of Cu and Ti. In the preparing materials process, Cu(NO₃)₂ and TIOT were calculated theoretically to obtain some photocatalysts of xCu-30Ti-SBA-15 (x and 30 as weight percent of CuO and TiO₂ in materials, respectively). The pH changing on the gel forming in neutral media (pH = 7.0) was made benefit conditions for doping Cu²⁺ in the matrix of TiO₂/SBA-15, therefor decreasing strongly band-gap energy of TiO₂, in the results of transforming excitation light for synthesis materials. A set of xCu-30Ti-SBA-15 catalysts prepared was characterized by some physical techniques such as adsorption/desorption isotherm nitrogen (BET), XRD, UV-Vis DRS. Their photocatalytic activities were exhibited by percentages of transformation for phenolic in water under different  excitation light sources (UV, halogenium).

Keywords. Photocatalyst, synthesis, doping, degradation, characterization.