Synergistic Cu single-atoms and clusters on tubular carbon nitride for efficient photocatalytic performances  

作　　者：Yu-Xiao Feng Hui-Jun Yu Tian-Guang Lu Zi-Ye Zheng Shuang Tian Li Xiang Shan Zhao Shu-Guang Wang Zuo-Li He 

机构地区：[1]Shandong Key Laboratory of Water Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Shandong University,Qingdao 266237,China [2]Weihai Research Institute of Industrial Technology of Shandong University,Shandong University,Weihai 264209,China [3]School of Electrical Engineering,Shandong University,Jinan 250061,China [4]CEDAR,Knight Cancer Institute,School of Medicine,Oregon Health and Science University,Portland 97201,USA

出　　处：《Rare Metals》2024年第11期5891-5904,共14页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.U22B20102);Shandong Provincial Natural Science Foundation(No.ZR2023QE218);the Young Taishan Scholars Program of Shandong Province(No.tsqn201909026);Taishan Scholars Project of Shandong Province(No.tstp20230604);the Future Young Scholars Program of Shandong University(No.61440089964189);the Key Laboratory of Organic Compound Pollution Control Engineering(MOE)Foundation(No.20190202)。

摘　　要：Metal clusters or even single-atoms dispersed and anchored on the photocatalysts'surface can enhance photocatalytic performances on organic pollutant oxidation.Here,a simple photoreduction method was used to create atomically dispersed metal single-atoms/clusters(MSCs,M=Cu,Pd,Au and Ag)on P-modulated tubular carbon nitride(TCN).The obtained MSCs@TCN demonstrated excellent photocatalytic performances for the degradation of sulfamethazine(SMZ).In particular,the photocatalyst with 2 wt%Cu loading showed ultrahigh SMZ oxidation efficiency(k=0.06110 min^(-1)),almost three times that of TCN(k=0.02066 min^(-1)).It also shows excellent stability in the 5th-cycle measurements.The improved photocatalytic activity of the CuSCs@TCN is ascribed to the synergistic promotion of photogenerated charge separation by Cu single-atoms/clusters as active sites,accelerated charge transfer from bulk TCN to Cu sites through Cu-N_(x)interaction.Meanwhile,the active sites of Cu single-atoms/clusters could promote the production of·O_(2)^(-),which participates in organic oxidation with strong oxidizing holes(h^(+)).This strategy paves a new avenue for designing high-performance photocatalysts decorated with metal single-atoms and clusters.

关 键 词：Carbon nitride PHOTOCATALYSIS Cu single-atom SULFAMETHAZINE Degradation 

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]