MoS2/ZnO异质结纳米材料降解亚甲基蓝的光催化性能研究
Photocatalytic properties of MoS2/ZnO heterojunction nanomaterials for degradation of methylene blue
王进美 1蒋守杰 2王春霞 3王丽丽 3高大伟3
作者信息
- 1. 西安工程大学 纺织与材料学院,陕西 西安 710048
- 2. 西安工程大学 纺织与材料学院,陕西 西安 710048;盐城工学院 纺织服装学院,江苏 盐城 224051
- 3. 盐城工学院 纺织服装学院,江苏 盐城 224051
- 折叠
摘要
为了提高ZnO的光转换效率,选用带隙较低的MoS2 形成异质结提高ZnO的光催化性能.通过水热法制备ZnO纳米棒,并进一步制备 MoS2/ZnO异质结构的纳米复合材料.通过扫描电镜(SEM)、X射线粉末衍射仪(XRD)、固体紫外可见漫反射测试仪(UV-Vis)和紫外可见分光光度计(UV-245)等分析方法对样品的形貌、结构及光学性能等进行表征.结果表明,MoS2/ZnO异质结复合材料呈棒状结构,并由于内建电场存在可有效增强光生载流子的分离效率,进而提高了可见光区的吸收,提高了光催化性能.在模拟太阳光(包含紫外波段)下,60 min时MoS2-15/ZnO纳米复合材料对亚甲基蓝的降解率可达99%,比纯ZnO的降解率提高了10%.
Abstract
In order to improve the ZnO light conversion efficiency,the heterojunction of MoS2 with low band gap was selected to improve the photocatalytic performance.ZnO nanorods were prepared by hydrothermal method,and MoS2/ZnO heterostructure nanocomposites were further prepared.The morphology,structure,and optical properties of the samples are characterized by scanning electron microscopy(SEM),X-ray powder diffracmeter(XRD),UV-Visible solid dif-fuse reflection tester(UV-Vis),and ultraviolet-visible spectrophotometer(UV-245).The re-sults show that the MoS2/ZnO heterostructure nanocomposite exhibited a rod-like structure,and the presence of a built-in electric field can effectively enhance the separation efficiency of photoge-nerated charge carriers,increase absorption in the visible light region,and thus improve the pho-tocatalytic performance.Under simulated sunlight(including UV band),the degradation rate of methylene blue by MoS2-15/ZnO nanocomposites reached 99%,which is 10%higher than that of pure ZnO after 60 min.
关键词
MoS2/ZnO/光催化/异质结/亚甲基蓝/纳米复合材料Key words
MoS2/ZnO/photocatalyst/heterojunction/methylene blue/nanocomposites引用本文复制引用
基金项目
江苏省产学研合作项目(BY2022509)
盐城工学院研究基金(xjr2020009)
出版年
2024
国家科技期刊平台
NSTL
万方数据