SnS_(2)/C_(3)N_(5)光催化剂的制备及其对亚甲基蓝的光催化降解  

Preparation of SnS_(2)/C_(3)N_(5)photocatalyst and its photocatalytic degradation of Methylene Blue

作　　者：韩龙 刘思乐 张申奥 万鑫雅 回梁川 赵诗曼 HAN Long;LIU Sile;ZHANG Shen′ao;WAN Xinya;HUI Liangchuan;ZHAO Shiman(Coal Industry Taiyuan Design and Research Institute Group Co.,Ltd.,Taiyuan 030001,China;Department of Chemistry and Chemical Engineering,Shenyang Institute of Science and Technology,Shenyang 110167,China)

机构地区：[1]煤炭工业太原设计研究院集团有限公司,山西太原030001 [2]沈阳科技学院化学与化工系,辽宁沈阳110167

出　　处：《印染》2025年第1期10-14,共5页China Dyeing and Finishing

基　　金：辽宁省教育厅2022年高等学校基本科研项目(LJK⁃MZ20021989);2024年国家级大学生创新训练项目(202413621001)。

摘　　要：通过溶剂蒸发法制备了二硫化锡/富氮氮化碳(SnS_(2)/C_(3)N_(5))光催化剂,采用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、紫外-可见漫反射光谱(UV-visDRS)、荧光光谱(PL)等方法对光催化剂的物相晶型、特征基团、光谱吸收、光电子-空穴重组分离和电化学性质进行表征与分析,研究了模拟太阳光下SnS_(2)/C_(3)N_(5)光催化降解亚甲基蓝(MB)的活性和稳定性。结果表明:模拟太阳光照射60min,MB的降解率达到96.6%,SnS_(2)/C_(3)N_(5)循环使用10次后MB的降解率仍大于95.0%,SnS_(2)/C_(3)N_(5)表现出优异的光催化活性和稳定性,归因于SnS_(2)和C_(3)N_(5)之间异质结的构建使光电子-空穴得到有效的分离,电荷传质阻力降低。高活性的超氧自由基(·O_(2)^(-))和空穴(h+)通过进攻MB分子将其降解为小分子无机物。基于能带结构和电位数据提出了SnS_(2)/C_(3)N_(5)光催化降解MB的Z型机理。Tin disulfide/nitrogen rich carbon nitride(SnS_(2)/C_(3)N_(5))photocatalyst is prepared by solvent evaporation method.The phase structure,characteristic groups,spectral absorption,photoelectron-hole recombination separation and electrochemical properties of the photocatalyst are characterized by XRD,FTIR,UV-vis DRS and PL patterns.The activity and stability of SnS_(2)/C_(3)N_(5)photocatalytic degradation of Methylene Blue(MB)un der simulated sunlight are evaluated.The results show that the degradation rate of MB reaches 96.6%after 60min of simulated sunlight irradiation,and the degradation rate of MB is still greater than 95.0%after 10 cycles SnS_(2)/C_(3)N_(5)exhibits excellent photocatalytic activity and stability attributed to the construction of heterojunction between SnS_(2)and C_(3)N_(5),photoelectron-holes are effectively separated,and the charge transfer resistance is re duced.Highly active superoxide radicals(·O_(2)^-)and holes(h^(+))degrade MB molecules into small molecule inor ganics by attacking MB molecules.Based on the energy band structure and potential data,the Z scheme mech anism of photocatalytic degradation of MB by SnS_(2)/C_(3)N_(5)is proposed.

关 键 词：SnS_(2) 富氮氮化碳 光催化剂 亚甲基蓝 Z型机理 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程] O643.36[轻工技术与工程—纺织科学与工程] O644.1[理学—物理化学]