Cu single atoms embedded on hollow g-C3N4 nanospheres with enhanced charge transfer and separation for efficient photocatalysis

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外文摘要：Establishing an effective charge transfer mechanism in carbon nitride(g-C3N4)to enhance its photocat-alytic activity remains a limiting nuisance.Herein,the combination design of a single Cu atom with hol-low g-C3N4 nanospheres(Cu-N3 structure)has been proven to offer significant opportunities for this cru-cial challenge.Moreover,this structure endows two pathways for charge transfer in the reaction,namely,the N atoms in the three-dimensional planar structure are only bonded with a single Cu atom,and charge transfer occurs between the plane and the layered structure due to the bending of the interlayered g-C3N4 hollow nanospheres.Notably,Cu-N3 and hollow nanosphere structures have been certified to greatly en-hance the efficiency of photogenerated carrier separation and transfer between the layers and planes by ultrafast spectral analysis.As a result,this catalyst possesses unparalleled photocatalytic efficiency.Specifically,the hydrogen production rate up to 2040 μmol h-1 g-1,which is 51 times that of pure C3N4 under visible light conditions.The photocatalytic degradation performance of tetracycline and oxidation performance of benzene is also expressed,with a degradation rate of 100％,a conversion of 97.3％and a selectivity of 99.9％.This work focuses on the structure-activity relationship to provide the possibilities for the development of potential photocatalytic materials.

外文关键词：

g-C3N4Cu single atomHollow nanospheresCharge transfer pathwaysPhotocatalytic hydrogen production

作者：

Linlin Zhang、Jianjun Liao、Yakun Li、Wei Sun、Chengjun Ge

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作者单位：

Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province,School of Ecology and Environment,Hainan University,Haikou 570228,China

Shandong Ocean Chemical Industry Scientific Research Institute,Weifang 262737,China

基金：

Hainan Province Science and Technology Special Fund国家自然科学基金Hainan Provincial Key Research and Development Programopenended fund of Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province

项目编号：

ZDYF2022SHFZ09422166016ZDYF2020222AFEPER202205

出版年：

2024

DOI：

10.1016/j.cclet.2023.108568

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(2)

参考文献量45