ZnO负载石墨相氮化碳光催化材料的制备及降解亚甲基蓝性能  

Preparation of ZnO-loaded graphitic phase carbon nitride photocatalytic materials and degradation performance of methylene blue

作　　者：回梁川 刘思乐 李婉婷 黄滢睿 雷婉冰 徐瑞 任宏轩 HUI Liangchuan;LIU Sile;LI Wanting;HUANG Yingrui;LEI Wanbing;XU Rui;REN Hongxuan(Department of Chemistry and Chemical Engineering,Shenyang Institute of Science and Technology,Shenyang 110167,China)

机构地区：[1]沈阳科技学院化学与化工系,辽宁沈阳110167

出　　处：《化工科技》2025年第1期35-40,共6页Science & Technology in Chemical Industry

基　　金：国家级大学生创新训练项目(202413621001)。

摘　　要：采用超声分散法制备ZnO负载石墨相氮化碳(g-C_(3)N_(4))光催化材料,通过XRD、FTIR、UV-Vis DRS、PL等手段对ZnO/g-C_(3)N_(4)光催化材料的物相、特征基团、光学性能及光电子-空穴复合率等进行表征。以亚甲基蓝(MB)为模拟染料溶液,考察ZnO/g-C_(3)N_(4)光催化材料对MB降解性能的影响并运用Langmuir-Hinshelwood方程对其动力学进行拟合,同时对ZnO/g-C_(3)N_(4)的稳定性进行研究。结果表明,在ZnO/g-C_(3)N_(4)复合光催化材料中g-C_(3)N_(4)和ZnO形成了异质结结构,提高了分离光电子-空穴的程度和光吸收效率,进而提升吸收可见光光谱范围。在光照60 min的条件时,光催化降解MB的效率为96.5%,在降解MB过程中,ZnO/g-C_(3)N_(4)循环利用5次后光催化效率仍然可以保持在94.3%,具有良好的光催化性、稳定性。超氧自由基(·O~-_2)和空穴(h~+)在所制备ZnO负载g-C_(3)N_(4)光催化材料降解MB过程中起到主要作用。The ZnO-loaded graphitic phase carbon nitride photocatalyst materials were prepared by using ultrasonic dispersion method.The physical crystalline form,characteristic groups,optical properties and photoelectron-hole complexation rate of ZnO/g-C_(3)N_(4) photocatalytic materials were characterised by XRD,FTIR,UV-Vis DRS and PL.The influence of ZnO/g-C_(3)N_(4) photocatalytic materials on the degradation performance of MB was investigated and the kinetics was fitted using Langmuir-Hinshelwood equation using methylene blue(MB)as a simulated dye solution,and the stability of ZnO/g-C_(3)N_(4) was also investigated.The results show that in the ZnO/g-C_(3)N_(4) composite photocatalytic material,it is not a normal combination between g-C_(3)N_(4) and ZnO but the formation of heterojunction structure,due to which the formation of heterojunction structure can further improve the degree of separating photoelectrons-holes and increase the efficiency of light absorption,which can further enhance the absorption of visible light spectral range.The photocatalytic degradation of MB by ZnO/g-C_(3)N_(4) reached 96.5%after 60 min of light irradiation.In the process of MB degradation,the photocatalytic efficiency of ZnO/g-C_(3)N_(4) can still reached 94.3%after 5 times of recycling,showing good photocatalytic properties and stability.The degradation of MB by ZnO/g-C_(3)N_(4) photocatalytic materials mainly relies on the action of the active groups superoxide radicals(·O-2)and holes(h+).

关 键 词：石墨相氮化碳 降解 光催化 亚甲基蓝 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]