Ala-CQDs/g-C_(3)N_(4)复合光催化剂的制备及其光催化性能研究  

Study on the Modification of Ala-CQDs/g-C_(3)N_(4) and Its Photocatalytic Properties

作　　者：靳爱玲 孙苏婉 时凯歌 杨明铭 Jin Ailing;Sun Suwan;Shi Kaige;Yang Mingming(College of Chemistry and Chemical Engineering,Zhengzhou Normal University,Zhengzhou 450044,China)

机构地区：[1]郑州师范学院化学化工学院,河南郑州450044

出　　处：《云南化工》2024年第11期30-34,共5页Yunnan Chemical Technology

基　　金：郑州师范学院本科教学改革研究一般项目(JXGGYB-232296,JXGGYB-232315);郑州师范学院大学生创新性实验计划项目(DCY2023019)。

摘　　要：以尿素为前驱体,以葡萄糖、柠檬酸为碳源,L-丙氨酸为氮源,通过水热法制备出不同质量比的AC/CN复合光催化剂。通过XRD、UV-Vis、FT-IR和荧光对复合光催化剂的晶相结构、光吸收特性、结构组成及光学性质进行了表征,并研究了其在可见光下对亚甲基蓝的降解活性。实验表明:AC/CN复合光催化剂相较于纯相CN提高了对可见光的利用率,并且有效地抑制了载流子空穴复合效率,提高了催化活性,当AC和CN的质量比为1∶3时表现为最佳光催化性能——可见光照射120 min后,AC/CN复合光催化剂对亚甲基蓝的总降解率达到43%,是纯相石墨相氮化碳光降解率的1.96倍。AC/CN composite photocatalysts with different mass ratios were prepared by hydrothermal method using urea as precursor,glucose and citric acid as carbon source and L-alanine as nitrogen source.XRD,UV-Vis,FT-IR and fluorescence were used to characterize the crystal structure,light absorption properties,structure composition and optical properties of the composite photocatalyst,and the degradation rate of methylene blue was investigated under visible light.The experimental results show that the AC/CN composite photocatalyst has higher utilization rate of visible light and can effectively inhibit the carrier hole recombination efficiency compared with pure CN thus improving the photocatalytic activity.When the mass ratio of AC and g-C_(3)N_(4) is 1∶3,the photocatalyst performance is the best.After visible light irradiation for 120 min,the total degradation rate of methylene blue by AC/CN composite photocatalyst reached 43%which was 1.96 times that of pure graphite carbon nitride photocatalytic effect.

关 键 词：石墨相氮化碳/碳量子点 可见光催化 有机污染物降解 

分 类 号：TQ426[化学工程]