摘要
采用硼氢化钠还原法制备了Ag负载Cd Mo O4光催化剂。运用X射线粉末衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)等测试手段对催化剂的组成和结构进行了表征;采用紫外-可见漫反射光谱(UV-Vis DRS)和X射线光电子能谱(XPS)等技术对催化剂的光响应和表面状态进行了分析,考察了不同Ag负载量对Cd Mo O4紫外光降解罗丹明B和可见光选择性氧化苯甲醇性能的影响。结果表明,与Cd Mo O4相比,Ag/Cd Mo O4具有更高的光催化活性。利用活性物种捕获实验探讨其光催化降解过程的反应机理,实验结果显示O2-·和·OH是光催化降解过程的主要活性物种。
Ag nanoparticles loaded CdMoO4 photocatalysts were prepared via a hydrothermal process followed by the sodium borohydride reduction method. The composition and structure of the catalysts were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM） and transmission electron microscopy （TEM） techniques. The photo-response and surface state of the catalysts were investigated by UV-Vis diffuse reflectance spectroscopy （UV-Vis DRS） and X-ray photoelectron spectroscopy （XPS）. The effect of the loaded amount of Ag nanoparticles on the photocatalytic activity of CdMoO4 photocatalyst for the degradation of rhodamine B （RhB） under UV light and the selective oxidation of benzyl alcohol under visible light were investigated. The results showed that the composite photoeatalysts exhibited significantly enhanced photocatalytic activity compared to pure CdMoO4. The mechanism was studied by employing chemical scavengers technology, which indicated that O2-· and · OH are the main species in the photocatalytic process.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2016年第11期1987-1994,共8页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.51672047
21303019
21407026)
福建省自然科学基金(No.2014J01047)
省部共建能源与环境光催化国家重点实验室自主课题(No.2014C03)资助项目
关键词
AG
钼酸镉
光催化
罗丹明B
苯甲醇
Ag
cadmium molybdate
photocatalysis
rhodamine B
benzyl alcohol
