Abstract
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.
基金项目
Hainan Province Science and Technology Special Fund(ZDYF2022SHFZ094)
国家自然科学基金(22166016)
Hainan Provincial Key Research and Development Program(ZDYF2020222)
openended fund of Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province(AFEPER202205)
万方数据