水溶液法制备的前驱体对g-C_(3)N_(4)结构及其催化活性的影响  

Effect of Precursors Prepared by Aqueous Solution Method on the Structure and Catalytic Activity of g-C_(3)N_(4)

作　　者：史乃申 于清波[1] 李玉琦 潘佳 任欣欣 SHI Naishen;YU Qingbo;LI Yuqi;PAN Jia;REN Xinxin(School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001

出　　处：《青岛科技大学学报（自然科学版）》2024年第1期29-34,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：安徽省自然科学基金项目(2108085MB36).

摘　　要：通过以水溶液法制备的氯化钠改性三聚氰胺为前驱体,制备了石墨相氮化碳。研究不同氯化钠加入量对熔融盐法制备的石墨相氮化碳材料结构和性能的影响。通过以亚甲基蓝(MB)为目标污染物的光催化模拟实验,表明当氯化钠添加量为1 g时,煅烧产物GCN-1的光催化性能最佳,其一级降解速率常数为0.01112 min^(-1),约为原始氮化碳的1.53倍。这可能由于水溶液制备的氯化钠改性三聚氰胺前驱体的晶体结构的改变,引起煅烧后氮化碳结晶性的增强,进而有助于电荷的快速传输,使得光生载流子的分离效率增强,从而增强了其可见光催化性能。Graphite phase carbon nitride was prepared by using melamine modified by sodium chloride as precursor.The effect of different NaCl content on the structure and properties of graphite phase carbon nitride materials prepared by molten salt method was studied.The photocatalytic simulation experiment with methylene blue(MB)as the target pollutant showed that when the addition amount of sodium chloride was 1 g,the calcined product GCN-1 had the best photocatalytic performance,and its first-order degradation rate constant was 0.01112 min^(-1),which is about 1.53 times that of the original carbon nitride.This may be due to the change of the crystal structure of the sodium chloride-modified melamine precursor prepared from the aqueous solution,which leads to the enhancement of the crystallinity of carbon nitride after calcination,which in turn contributes to the rapid transport of charges and enhances the separation efficiency of photogenerated carriers.Thus,its visible light catalytic performance was enhanced.

关 键 词：水溶液法 石墨相氮化碳 熔融盐 光催化 

分 类 号：O656.4[理学—分析化学]