Photocatalytic Degradation of Rhodamine B with H 3 PW 12 O 40 /SiO 2 Sensitized by H 2 O 2. (14th October 2012)

• Record Type: Journal Article
• Authors: Yang, Shuijin; Huang, Yongkui; Wang, Yunzhi; Yang, Yun; Xu, Mingbo; Wang, Guohong
• Other Names: Yu Huogen Academic Editor.
• Is Part Of: International journal of photoenergy. Volume 2012(2012)
• Publication Date: 2012-10-14
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2012/927132
• Languages: English
• ISSNs: 1110-662X

Abstract

Abstract : In order to remove aquatic organic dye contaminants by utilizing the inexpensive and inexhaustible solar energy, the Keggin-type H3 PW12 O40 was loaded on the surface of SiO2 with the sol-gel method and sensitized by H2 O2 solution. The photocatalytic degradation of rhodamine B (RhB) by H3 PW12 O40 /SiO2 (x) under simulated natural light irradiation was investigated. The effects of the initial RhB concentration, the solution pH, and catalyst dosage on the photocatalytic degradation rate of RhB were also studied. The results demonstrated that at optimal condition (initial concentration of methyl orange is 10 mg/L, catalyst dosage is 0.8 g, and the pH is 2.5) the degradation rate of RhB is as high as 97.7% after 2 h under simulated natural light irradiation. The reaction of photocatalysis for RhB can be expressed as a first-order kinetic model.