摘要
通过简单搅拌法,成功制备了不同质量比的WO_(3)/Ag_(3)PO_(4)复合材料。用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、能谱(EDS)、透射电镜(TEM)和紫外可见漫反射光谱(UV-vis DRS)等分析方法对制备的样品进行表征。表征结果表明WO_(3)纳米晶在Ag_(3)PO_(4)纳米片的表面上均匀分布,形成了异质结结构。由UV-vis DRS分析可知,WO_(3)/Ag_(3)PO_(4)复合材料具有较好的可见光响应。在可见光下照射下,以亚甲基蓝为目标污染物进行光催化降解实验。实验表明,大部分质量比的WO_(3)/Ag_(3)PO_(4)复合材料光催化活性优于纯Ag_(3)PO_(4),其中WO_(3)/Ag_(3)PO_(4)(10 wt%)光催化剂降解活性最高,1和内降解率达到90.1%并且稳定性较好。光催化活性的增强是由于WO_(3)纳米晶体的附着,导致WO_(3)/Ag_(3)PO_(4)界面上光生载流子有效分离,提高了Ag_(3)PO_(4)材料的光吸收范围。
WO_(3)/Ag_(3)PO_(4) composites with different mass ratios were prepared by a simple stirring method.The prepared samples were characterized by analytical methods such as X-ray diffraction(XRD),X-ray photome energy spectroscopy(XPS),scanning electron microscopy(SEM),energy spectroscopy(EDS),transmission radio microscopy(TEM),and UV visible diffuse spectroscopy(UV-vis DRS).The characterization results showed that WO_(3) nanocrystals were uniformly distributed on the surface of Ag_(3)PO_(4) nanosheets,forming a heterojunction structure.According to UV-vis DRS analysis,WO_(3)/Ag_(3)PO_(4) composite material had a good response to visible light.Under visible light irradiation,the photocatalytic degradation experiment was carried out with methylene blue as the target pollutant.It was shown that the photocatalytic activity of most WO_(3)/Ag_(3)PO_(4) composites by mass ratio was better than that of pure Ag_(3)PO_(4).Among them,WO_(3)/Ag_(3)PO_(4)(10 wt%)photocatalyst had the highest degradation activity with a degradation rate of 90.1%within 1 h and good stability.The enhancement of photocatalytic activity was due to the adhesion of WO_(3) nanocrystals,which resulted in the effective separation of photogenerated carriers on WO_(3)/Ag_(3)PO_(4) interface and increased the light absorption range of the Ag_(3)PO_(4) material.
作者
张蓓蓓
张蕾
康正芳
王正军
刘超
ZHANG Bei-bei;ZHANG Lei;KANG Zheng-fang;WANG Zheng-jun;LIU Chao(School of Chemistry&Chemical Engineering,Yancheng Institute of Technology,Jiangsu Yancheng 224051;Yancheng Guohuan Ruibao Technology Co.,Ltd,Jiangsu Yancheng 224000;Lianyungang Lianxin FRP Co.,Ltd.,Jiangsu Lianyungang 222000;School of Materials Science&Engineering,Yancheng Institute of Technology,Jiangsu Yancheng 224051,China)
出处
《广州化工》
CAS
2022年第8期54-58,共5页
GuangZhou Chemical Industry
基金
国家自然科学基金青年项目(项目编号:51902282)
江苏高校“青蓝工程”。
