Mechanism insight into the enhanced photocatalytic purification of antibiotic through encapsulated architectures coupling of crystalline Cu_(2)O/amorphous TiFe layer double hydroxide  

作　　者：Lin Ye Shaodong Sun Xiaoli Yang Xiaoxi Chen Bian Yang Daqin Yun Xiaojing Yu Man Yang Qing Yang Shuhua Liang Jie Cui 

机构地区：[1]Engineering Research Center of Conducting Materials and Composite Technology,Ministry of Education,Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology,Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology,School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China [2]College of Energy,Xiamen University,Xiamen 361005,China

出　　处：《Journal of Materials Science & Technology》2023年第36期161-170,共10页材料科学技术（英文版）

摘　　要：Amorphous materials are one of the important candidates for improving heterogeneous photocata-lysts because of their unique electronic structures and abundant catalytic sites originating from dis-order atomic arrangements.However,there is still much room for the development of new crys-talline/amorphous heterogeneous composites for photocatalytic application.Hence efficient synthetic strategies for preparing new crystalline/amorphous heterojunctions are highly desired.Herein,we have realized the deep optimization of photocatalytic activity by fabricating crystalline/amorphous Cu_(2)O/Ti-Fe layer double hydroxide(LDH)heterojunctions.Thanks to the typical Z-scheme mechanism originating from the crystalline/amorphous interfaces,the photocharge separation and catalytic active sites obviously enhance compared to single Cu_(2)O and LDH counterparts.As expected,the photocatalytic removal of tetra-cycline(TC)of the as-prepared Cu_(2)O/Ti-Fe LDH was over 5.2 and 2.2 times those of the pristine Cu_(2)O nanospheres and Ti-Fe LDH nanosheets.This work illustrates the origin of crystalline Cu_(2)O nanospheres encapsulated in amorphous Ti-Fe layer double hydroxide nanosheets for enhanced photocatalytic activity driven by visible light,and provide a general Cu_(2)O-templated solution-phase synthetic method for the synthesis of novel double-metal layer double hydroxide amorphous nanostructures.

关 键 词：Crystalline Cu_(2)O Amorphous Ti-Fe LDH Z-scheme mechanism Charge separation PHOTODEGRADATION 

分 类 号：TG174.4[金属学及工艺—金属表面处理]