A molybdenum sulfo-oxide/cobalt oxysulfide Z-scheme heterojunction catalyst for efficient photocatalytic hydrogen production and pollutant reduction. Issue 10 (14th February 2022)

• Record Type: Journal Article
• Authors: Wu, Qinhan; Abdeta, Adugna Boke; Kuo, Dong-Hau; Zhang, Hanya; Lu, Qingxin; Zhang, Jubin; Zelekew, Osman Ahmed; Mosisa, Mengistu Tadesse; Lin, Jinguo; Chen, Xiaoyun
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 10(2022)
• Page Start: 5328
• Page End: 5349
• Publication Date: 2022-02-14
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta09053d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Sulfur-doped oxide (oxysulfide)/oxygen-doped sulfide (sulfo-oxide) with a Z-scheme heterogeneous interface improves the efficiency of photocatalytic hydrogen production. Abstract : The existence of a heterojunction in the catalyst structure improves the efficiency of photocatalytic hydrogen production. The two phases of the heterojunction can be adjusted simultaneously by doping sulfur and oxygen to achieve a suitable energy band structure. Herein, we demonstrated a Mo(S, O)/Co(O, S) Z-scheme heterojunction catalyst system (abbreviated as MoCoOS) with different Co(O, S) doping amounts by a simple one-step method. Doping of different atoms in the crystal changes the energy band structure which tunes the optical, electrical, and electrochemical properties of MoCoOS. MoCoOS-2 prepared at a Co precursor content of 20 mmol performed the best at a rate of 153.4 μmol h −1 in photocatalytic hydrogen evolution, and it also showed excellent catalytic activities and good stability in reducing MO, MB, RhB, 4-NP and Cr 6+ . This efficient MoCoOS-2 catalyst can have practical applications in photocatalytic hydrogen production and catalytic reduction of chemical pollutants.