Ni-P@g-C_(3)N_(4)复合材料的合成与可见光催化性能  

Preparation and visible-light photocatalytic properties of Ni-P@g-C_(3)N_(4)composites

作　　者：艾兵[1] 何海南 邓璇 孙立新 杨超 李德刚[1] AI Bing;HE Hai-nan;DENG Xuan;SUN Li-xin;YANG Chao;LI De-gang(School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学化学化工学院,山东淄博255049

出　　处：《化学研究与应用》2023年第7期1534-1540,共7页Chemical Research and Application

基　　金：淄博市校城融合发展计划项目(2017ZBXC206)资助。

摘　　要：以三聚氰胺为前驱体,采用两步热聚合法,制备了一系列石墨相氮化碳(g-C_(3)N_(4))基光催化复合材料。通过X-射线衍射光谱(XRD)、扫描电子显微镜(SEM)、N_(2)吸附、光致荧光光谱(PL)、傅里叶变换红外光谱(FT-IR)和电化学阻抗谱(EIS)等表征了其结构与光电特性。结果发现,Ni-P共掺杂可以有效改善g-C_(3)N_(4)的可见光吸收性能,减小其电化学阻抗,抑制光生载流子的复合。以可见光条件下降解亚甲基蓝(MB)溶液为探针反应研究了Ni-P@g-C_(3)N_(4)复合材料的光催化降解性能。结果表明,照射120分钟1.5%Ni/P-CN复合材料对MB的降解率为61.7%,速率常数为0.00785 min^(-1),是纯g-C_(3)N_(4)的两倍。反应体系的主要活性物种为超氧自由基(·O_(2)^(-))。经过简单处理催化剂可重复使用3次以上且活性保持稳定。A series of graphitic carbon nitride(g-C_(3)N_(4))based photocatalytic composites were prepared by two-step thermal polymeri-zation with melamine as precursor.Its structure and photoelectric properties were characterized by X-ray diffraction spectroscopy(XRD),scanning electron microscopy(SEM),N2 adsorption,photoluminescence spectroscopy(PL),Fourier transform infrared spectroscopy(FT-IR)and electrochemical impedance spectroscopy(EIS).The results showed that Ni-P co-doping could effectively improve the visible light absorption performance of g-C_(3)N_(4),reduce its electrochemical impedance,and inhibit the recombination of photo-generated carriers.The photocatalytic degradation performance of the Ni-P@g-C_(3)N_(4)composite materials were studied using the degradation of methylene blue(MB)solution under visible light conditions as a probe reaction.The results showed that the deg-radation rate of MB by 1.5%Ni/P-CN composite was 61.7%after 120 minutes of irradiation and the degradation rate constant was 0.00785 min-1,which was twice that of pure g-C_(3)N_(4).The main active species of the reaction system was superoxide radical(·O_(2)^(-)).After simple treatment,the catalysts could be reused for more than 3 times and the activity remained stable.

关 键 词：石墨相氮化碳 共掺杂 Ni-P@g-C_(3)N_(4) 复合材料 可见光催化 

分 类 号：O614.8[理学—无机化学]