Experimental and DFT insights of the Zn-doping effects on the visible-light photocatalytic water splitting and dye decomposition over Zn-doped BiOBr photocatalysts
學年 107
學期 2
出版（發表）日期 2019-04-15
作品名稱 Experimental and DFT insights of the Zn-doping effects on the visible-light photocatalytic water splitting and dye decomposition over Zn-doped BiOBr photocatalysts
作品名稱（其他語言）
著者 Junqiu Guo; Xin Liao; Ming-Hsien Lee; Geoff Hyett; Chung-Che Huang; Daniel W. Hewak; Sakellaris Mailis; Wei Zhou; Zheng Jiang
單位
出版者
著錄名稱、卷期、頁數 Applied Catalysis B: Environmental 243, p.502-512
摘要 Synergetic experimental and DFT insights of energy band structures and photogenerated rate-limiting reactive species are indispensable to design impurity-doped photocatalysts for photocatalytic environment remediation and solar fuels. Herein, despite the larger bandgap (Eg) of the Zn-doped BiOBr samples, they exhibited superior activity to BiOBr in the photocatalytic water splitting but impaired the photodegradation of Rhodamine B under visible-light illumination. Based on the spectral and electrochemical impedance characterisations and DFT simulations, the wider bandgaps of Zn-doped BiOBr samples were explicitly assigned to the more positive valence band maxima (VBM) and more negative conduction band minima (CBM). The enhanced photocatalytic water splitting on the Zn-doped BiOBr was arisen from the higher redox chemical potentials of charge carriers on respective CBM and VBM, suppressed back reactions and depressed recombination of photogenerated charge carriers. However, the reduced e−-h+ recombination on the Zn-doped BiOBr cannot cancel the detrimental influences from the weaker light absorption and dye-sensitisation effects, leading to slower RhB photodegradation.
關鍵字 Photocatalysis;Zn-doped BiOBr;Photoelectrochemistry;Band structure;DFT
語言 en
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117077 )