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作 者:Shuaitao Li Haodi Liu Xun Hu Yanfen Fang Xiaofeng Cao Qifeng Chen
机构地区:[1]School of Materials Science&Engineering,University of Jinan,Jinan 250022,China [2]College of Biological and Pharmaceutical Sciences,China Three Gorges University,Yichang 443002,China [3]Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China
出 处:《Journal of Environmental Sciences》2025年第5期594-607,共14页环境科学学报(英文版)
基 金:supported by the National Natural Science Foundation of China(NSFC)(Nos.22076063,22076098,and 21477047);the Natural Science Foundation of Shandong Province(No.ZR2020MB033);the Key Laboratory of Photochemical Conversion and Optoelectronic Materials,TIPC,CAS(No.PCOM202106);the program for Taishan Scholars of Shandong Province,and the Science and Technology Programof the University of Jinan(No.XKY2111).
摘 要:Volatile Organic Compounds(VOCs)are highly harmful to human beings and other organisms,and thus the elimination of VOCs is extremely urgent.Here,La-Si co-doped TiO_(2)microsphere photocatalysts,which were prepared by a hydrothermal method,exhibited high photocatalytic activity in the decomposition of formaldehyde compared with TiO_(2).The improved activity can be attributed to the promoted separation efficiency and density of the charge carriers,as verified by the electrochemical results in combination with density functional theory calculations.In addition,the Si dopant changed the microstructure and surface acidity,while the addition of La promoted the separation efficiency of charge carriers.More interestingly,it was found that singlet oxygen was the key species in the activation of molecular dioxygen,and it played a pivotal role in the photocatalytic decomposition of formaldehyde.This work provides a novel strategy for the selective activation of dioxygen for use in the decomposition of formaldehyde.
关 键 词:Dioxygen molecular activation La-Si co-doped TiO_(2)microspheres Formaldehyde degradation Photocatalysis
分 类 号:X703[环境科学与工程—环境工程]
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