Sn_(3)O_(4)/g-C_(3)N_(4)复合材料的合成及光催化降解甲基橙性能研究  

Synthesis of Sn_(3)O_(4)/g-C_(3)N_(4) composites and the photocatalytic degradation of methyl orange

作　　者：张霞 张灏昱 黄姝姝 ZHANG Xia;ZHANG Haoyu;HUANG Shushu(School of Light Industry and Textiles,Inner Mongolia University of Technology,Hohhot 010080,China)

机构地区：[1]内蒙古工业大学轻工与纺织学院,呼和浩特010080

出　　处：《内蒙古工业大学学报（自然科学版）》2024年第4期373-378,共6页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自治区自然科学基金项目(2021BSO2004);内蒙古工业大学科学研究项目(BS2020035,ZZ202011)。

摘　　要：针对Sn_(3)O_(4)在可见光下催化性能差的问题,合成了一系列Sn_(3)O_(4)/g-C_(3)N_(4)纳米复合材料。通过X-射线粉末衍射、扫描电镜、固体紫外等分析结果表明,Sn_(3)O_(4)/g-C_(3)N_(4)复合光催化剂的成功制备和g-C_(3)N_(4)的加入有效提高了Sn_(3)O_(4)光催化剂的可见光响应能力。光催化去除甲基橙MO染料废水性能结果显示,Sn_(3)O_(4)/5%g-C_(3)N_(4)表现出最优异的降解效率,光照120 min后去除率可达到90.21%,分别是纯Sn_(3)O_(4)(22%)和g-C_(3)N_(4)(44.4%)的4.65倍和2.03倍。同时,通过自由基捕获实验证实了羟基自由基(^(.)OH)、空穴(h^(+))和超氧自由基(^(.)O_(2)^(-))为Sn_(3)O_(4)/g-C_(3)N_(4)光催化去除甲基橙过程中的主要活性物质。To address the issue of poor catalytic performance of Sn_(3)O_(4) under visible light,a series of Sn_(3)O_(4)/g-C_(3)N_(4) heterojunction photocatalysts were synthesized.The results of X-ray powder diffraction,scanning electron microscopy and solid ultraviolet analysis show that the preparation of Sn_(3)O_(4)/g-C_(3)N_(4) composite photocatalyst and the addition of g-C_(3)N_(4) can effectively improve the visible light response of Sn_(3)O_(4) photocatalyst.The results of photocatalytic removal of methyl orange dye wastewater showed that Sn_(3)O_(4)/5%g-C_(3)N_(4) showed the best degradation efficiency,and the removal rate reached 90.21%after 120 min illumination,which were 4.1 and 2.1 times of pure phase Sn_(3)O_(4)(22%)and g-C_(3)N_(4)(44.4%),respectively.At the same time,it was confirmed that photogenerated electron(e^(-)),hole(h^(+))and superoxide radical(^(.)O_(2)^(-))were the main active substances in Sn_(3)O_(4)/g-C_(3)N_(4) photocatalytic removal of methyl orange by free radical trapping experiments.

关 键 词：复合光催化材料 光催化 甲基橙 活性物质 

分 类 号：O643.32[理学—物理化学]