Selective Removal of Photocatalytically Active Anatase TiO_(2)Phase from Mixed-Phase TiO_(2)-ZnO Nanocomposites:Impact on Physicochemical Properties and Photocatalytic Activity

作     者：Nambath Gayathri Menon Sankara Sarma V.Tatiparti Suparna Mukherji Nambath Gayathri Menon;Sankara Sarma V.Tatiparti;Suparna Mukherji

作者机构：Centre for Research in Nanotechnology and ScienceIndian Institute of Technology BombayMumbai Maharashtra 400076India Department of Energy Science and EngineeringIndian Institute of Technology BombayMumbai Maharashtra 400076India Environmental Science and Engineering DepartmentIndian Institute of Technology BombayMumbai Maharashtra 400076India 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2020年第3卷第4期

页      面：548-559页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：provided by Department of Science and Technology New Delhi India under the Water Technology Initiative(WTI)scheme(Project code:DST/TM/WTI/2K15/101(G)) 

主　　题：anatase TiO_(2) TiO_(2)–ZnO nanocomposites Visible light photocatalysis 

摘      要：TiO_(2)-ZnO nanocomposites were synthesized by varying Ti:Zn molar ratio from 1:0.1(TZ-1:0.1)to 1:1(TZ-1:1).With increase in Zn content,from TZ-1:0.1 to TZ-1:0.2,anatase transformed to rutile ***-1:0.3,which contained a blend of phases,including rutile and anatase TiO_(2),ZnO,and zinc titanates,exhibited the narrowest bandgap(2.5±0.1 e V),and showed the highest photocatalytic ***-1:1 was predominated by zinc *** the nanocomposites exhibited narrower bandgaps compared to pure TiO_(2)nanoparticles,facilitating visible light *** study was designed to explore whether a method targeting the removal of a specific crystalline phase(anatase)influenced the properties and photocatalytic activity of the *** dissolution not only removed anatase phase,but also led to significant loss of crystallinity,widened the bandgap,and adversely affected photocatalytic performance,in nanocomposites that contained80%anatase phase(TZ-1:0.1 and TZ-1:0.2).However,in nanocomposites that contained less of anatase phase(TZ-1:0.3and TZ-1:1),the morphology,bandgap,crystallinity,and the extent of photocatalytic activity at the end of 240 min remained largely *** activity in TZ-1:0.3 and TZ-1:1 originated from a blend of phases comprising of less photocatalytically active phases,such as rutile TiO_(2),Zn TiO3,and Zn2TiO4,rather than from the anatase *** Ti:Zn molar ratio controlled the phases present in TiO_(2)-ZnO nanocomposites,which,in turn,controlled the physicochemical properties and visible light ***,in nanocomposites that contained a mix of several phases,the properties and photocatalytic activity were not dependent on anatase phase.