期刊
APPLIED SURFACE SCIENCE
卷 534, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147577
关键词
Hetero-composite; Semiconductors; Photodegradation; RhB; Bismuth oxyhalids
类别
资金
- thematic science and technology research agency (ATRSDT) of the general direction of scientific research and technological development (DGRSDT) within the Algerian ministry of higher education and scientific research [A16N01UN270120200005]
- TASSILI project [19MDU205]
Improvement of the photocatalytic efficiency of BiOI/BiOBr composite have been obtained by a combined effect between a structuring agent like polyvinylpyrrolidone (PVP) and glass wool (GW) introduced during their synthesis by solvothermal (STP) or hydrothermal (HTP) process. The photocatalysts were characterized by XRD, SEM, XPS, UV-Visible DRS, BET and EDX and their activity tested in the photo-degradation of Rhodamine B (RhB) under visible light. Photocatalyst prepared by STP have higher photocatalytic efficiency than those prepared by HTP, moreover, the presence of PVP and GW greatly improve this efficiency, a total discoloration of RhB solution (20 mg L-1) being obtained after 18 min. The photodegradation mechanism has been proposed by the identification of the radical species responsible for the degradation. Indeed, two radical species have been identified for the catalyst prepared without GW, most of them the hole (h(+)) and moderately super oxide anion (O-2(center dot-)). Differently, for the catalyst prepared with GW, three species have been identified, h(+) being the main species with a moderate contribution of the hydroxyl radical (HO center dot) and O-2(center dot-).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据