Facile one-step hydrothermal synthesis of noble-metal-free hetero-structural ternary composites and their application in photocatalytic water purification. Issue 80 (1st November 2017)

• Record Type: Journal Article
• Authors: Zhang, Yuanyuan; Ma, Yongchao; Wang, Lili; Sun, Qinxing; Zhang, Fan; Shi, Jinsheng
• Is Part Of: RSC advances. Volume 7:Issue 80(2017)
• Page Start: 50701
• Page End: 50712
• Publication Date: 2017-11-01
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra10732c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The development of heterostructured and metal decorated photocatalysts using a relatively simple, efficient and economical one-step strategy is crucial for commercial applications. Abstract : The development of heterostructured and metal decorated photocatalysts using a relatively simple, efficient and economical one-step strategy is crucial for commercial applications. However, these materials are usually synthesized through two- or multi-step approach. Herein, a facile one-step hydrothermal method was used to fabricate a noble-metal-free heterostructural BiOCl/Bi2 MoO6 /Bi ternary composite from BiOCl for the first time. First, BiOCl was dispersed in ethylene glycol (EG), H2 O and glycerol (GLY) and the BiOCl/Bi2 MoO6 /Bi ternary composite was formed after Na2 MoO4 was introduced into BiOCl in EG. However, only binary BiOCl/Bi2 MoO6 and BiOCl/Bi photocatalysts were obtained from BiOCl in H2 O and GLY, respectively. Using the same synthetic route, BiOCl/Bi2 WO6, BiOCl/Bi2 WO6 /Bi and BiOCl/Bi were also synthesized in H2 O, EG and GLY, respectively. The photocatalytic activities of as-prepared three samples were investigated by applying them for the photocatalytic disinfection of bacteria and organic pollutant degradation. Under visible-light irradiation, the BiOCl/Bi2 MoO6 /Bi ternary composite presented the highest photocatalytic activity in comparison with the other two binary samples; the water disinfection with 100% inactivation of bacteria was realized within 4 h. The intermediates of RhB photodegradation were qualitatively identified by liquid chromatography tandem mass spectrometry (LC-MS/MS) and a possible mechanism and detailed degradation pathway were proposed.