One stone,three birds:up-conversion,photothermal and p-n heterojunction to boost BiOBr:Yb^(3+),Er^(3+)/Cu_(3)Mo_(2)O_(9) full spectrum photodegradation  

作　　者：Xintong Yao Dong Zhang Yupeng Liu Yanzhao Chen Dafeng Zhang Junchang Liu Xue-Yang Ji Hengshuai Li Peiqing Cai Xipeng Pu 

机构地区：[1]School of Materials Science and Engineering,Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology,Liaocheng University,Liaocheng 252000,China [2]School of Physics Science and Information Technology,Shandong Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng 252000,China [3]College of Optical and Electronic Technology,China Jiliang University,Hangzhou 310018,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第10期119-131,共13页化学科学与工程前沿（英文版）

基　　金：supported by Shandong Provincial Natural Science Foundation,China(Grant Nos.ZR2022ME179,ZR2021QE086);Liaocheng Key Research and Development Program(Policy Guidance Category)(Grant No.2022YDSF89);Liaocheng University Innovation and Entrepreneurship Training Program for College Students(Grant No.2020205963);the 4B9A station of the Beijing Synchrotron Radiation Facility(BSRF).

摘　　要：Broadening spectral response range to realize the full spectrum photocatalysis is crucial to develop photocatalysts with satisfactory light-energy conversion ability.A full-spectrum driven p-n heterojunction photocatalytic system was rationally designed through introducing the Er^(3+)/Yb^(3+)co-doped BiOBr with up-conversion effect as the collector of near infrared light and photocatalysts substrate.Meanwhile,Cu_(3)Mo_(2)O_(9) with the photothermal effect as a heat source to accelerate the reaction at the surface through absorbing the near infrared light.The photocatalytic activity of BiOBr:Yb^(3+),Er^(3+)/Cu3Mo2O9 composite was markedly strengthened under visible and near infrared light irradiation,and the BiOBr:Yb^(3+),Er^(3+)/Cu_(3)Mo_(2)O_(9)-5 composite displayed the optimal photodegradation activities for 0.03372 min^(-1) and 0.058 h^(-1),being 2.3-folds and 2.4-folds than that of pure BiOBr:Yb^(3+),Er^(3+)under the visible and near infrared light,respectively.The position of doped ions(Yb^(3+)and Er^(3+))in BiOBr:Yb^(3+),Er^(3+)was determined from the X-ray absorption fine structure spectra.And the reasonable mechanism of p-n heterojunction was proposed base on the results of experimental and density functional theory calculation.This work provides a rational strategy for the design and development of full-spectrum heterojunction photocatalysts with the up-conversion and photothermal effects to increase the photocatalytic performance.

关 键 词：photocatalyst full spectrum p-n heterojunction photothermal effect UP-CONVERSION 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]