title: Oxygen vacancy induced bismuth oxyiodide with remarkably increased visible-light absorption and superior photocatalytic performance.
abstract: With the increasingly serious environmental problems, photocatalysis has recently attracted a great deal of attention, with particular focus on water and air purification and disinfection. Herein, we show an electroreduction strategy to improve significantly the solar absorption and donor density of BiOI nanosheet photocatalyst by introducing oxygen vacancies. These oxygen-deficient BiOI nanosheets exhibit an unexpected red shift of about 100 nm in light absorption band and 1 order of magnitude improvement in donor density compared to the untreated BiOI nanosheets and show 10 times higher photocatalytic activity than the untreated BiOI nanosheets for methyl orange (MO) degradation under visible light irradiation. Moreover, the as-prepared oxygen-deficient BiOI nanosheets also have excellent cycling stability and superior photocatalytic performance toward other dye pollutants.
authors.affiliation: Department of Chemical Engineering, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Yongchao
authors.initials: Y
authors.lastname: Huang
authors.forename: Haibo
authors.initials: H
authors.lastname: Li
authors.forename: Muhammad-Sadeeq
authors.initials: MS
authors.lastname: Balogun
authors.forename: Wenyue
authors.initials: W
authors.lastname: Liu
authors.forename: Yexiang
authors.initials: Y
authors.lastname: Tong
authors.forename: Xihong
authors.initials: X
authors.lastname: Lu
authors.forename: Hongbing
authors.initials: H
authors.lastname: Ji
keywords: bismuth oxyhalide; oxygen vacancy; photocatalytic; visible light