双金属CuNi修饰g-C_(3)N_(4)光催化剂制备及降解水中四环素性能研究  

Preparation and degradation of tetracycline in water by bimetallic Cu-Ni modified g-C_(3)N_(4)photocatalyst

作　　者：马征 赵立双 魏立国 杨懿 MA Zheng;ZHAO Li-shuang;WEI Li-guo;YANG Yi(Heilongjiang University of Science and Technology,College of Environmental and Chemical Engineering,Harbin 150022,China)

机构地区：[1]黑龙江科技大学环境与化工学院,哈尔滨150022

出　　处：《炭素》2024年第4期11-16,共6页Carbon

基　　金：黑龙江省大学生创新训练项目(项目编号S202410219023)

摘　　要：石墨相氮化碳(g-C_(3)N_(4),CN)作为光催化剂具有光生电子-空穴分离效率低、电子传输差等难题,为解决这些难题,本研究中,采用一步水热法制备了双金属Cu-Ni修饰的Cu-Ni@CN系列催化剂。通过XRD、FTIR、XPS等手段进行结构表征,表明成功制备双金属Cu-Ni修饰的g-C_(3)N_(4)复合结构。以四环素为模拟污染物,考察了Cu/Ni摩尔配比和复合质量配比,确定性能最优异的摩尔配比为1:1,复合质量比为5%-Cu-Ni-11@CN催化剂,且降解率高达89.8%;自由基捕获测试确定其最主要活性物种为空穴(h^(+));通过固体荧光、光电流密度和电化学阻抗测试,揭示了复合材料的催化降解四环素机制。Graphitic carbon nitride(g-C_(3)N_(4),CN)exhibits limitations such as inadequate photoelectron-hole separation efficiency and suboptimal electron transport.To address these challenges,this study developed a series of bimetallic Cu-Ni modified catalysts(Cu-Ni@CN)via a one-step hydrothermal method.The successful preparation of the bimetallic Cu-Ni modified g-C_(3)N_(4)composite structure was confirmed using XRD,FTIR,and XPS analyses.Tetracycline was employed as a model pollutant to investigate the effects of varying Cu/Ni molar ratios and composite mass ratios.The optimal molar ratio was determined to be 1:1,with the most effective composite mass ratio being 5%-Cu-Ni-11@CN,achieving a degradation rate of up to 89.8%.Free radical capture tests identified holes(h^(+))as the most active species.Solid fluorescence,photocurrent density,and electrochemical impedance measurements elucidated the catalytic degradation mechanism of tetracycline.

关 键 词：四环素 光催化 g-C_(3)N_(4) 双金属Cu-Ni 光催化性能 

分 类 号：TH133.31[机械工程—机械制造及自动化]