Chemical Physics ( IF 2.3 ) Pub Date : 2018-09-22 , DOI: 10.1016/j.chemphys.2018.09.031 Hongxia Fan , Hualei Zhou , Hongda Li , Xintong Liu , Chaojun Ren , Fangzhi Wang , Wenjun Li
In this study, Ag2CrO4/Bi2O2CO3 composites were synthesized through a simple chemical precipitation process. XRD, SEM, TEM and XPS characterization suggested that the close heterojunction successfully formed between Ag2CrO4 and Bi2O2CO3. Diffuse Reflectance Spectra (DRS) experiments suggested that Ag2CrO4/Bi2O2CO3 composites had a wide light absorption band throughout the whole visible light region. The photoluminescence spectra (PL) implied that the formation of the heterojunction notably suppressed the recombination of photo-generated electron-hole. The excellent photocatalytic activity of Ag2CrO4/Bi2O2CO3 heterojunction for the degradation of RhB, MO and MB should be ascribed to both the wide visible-light absorption and the efficient separation of photo-generated electron-hole. In addition, the possible mechanism for the enhanced photocatalytic activity was also proposed.
中文翻译:
新型Ag 2 CrO 4 / Bi 2 O 2 CO 3异质结:制备简单,可见光吸收带宽,具有出色的光催化活性
在这项研究中,通过简单的化学沉淀法合成了Ag 2 CrO 4 / Bi 2 O 2 CO 3复合材料。XRD,SEM,TEM和XPS表征表明,Ag 2 CrO 4与Bi 2 O 2 CO 3之间成功形成了紧密的异质结。漫反射光谱(DRS)实验表明,Ag 2 CrO 4 / Bi 2 O 2 CO 3复合材料在整个可见光区域具有较宽的光吸收带。光致发光光谱(PL)暗示异质结的形成显着抑制了光生电子空穴的复合。Ag 2 CrO 4 / Bi 2 O 2 CO 3异质结对RhB,MO和MB的降解具有优异的光催化活性,这应归因于可见光的广泛吸收和光生电子空穴的有效分离。此外,还提出了增强光催化活性的可能机理。