期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 316, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121675
关键词
Photocatalysis; Sustainable chemistry; Peroxides; Nanostructures; Bismuth phosphate
资金
- Natural Science Foundation of Jiangsu Province [BK20201345]
- National Natural Science Foundation of China [22172065, 21908079, 21676123, 21902009, 21707052, U21A20326]
- National Key R&D Program of China [2021YFB3501900]
- Startup Funding at Jiangnan University [1045210322190170, 1045281602190010, 1042050205204100, 1045219039200010, 1045219032210020]
- State Key Laboratory of Fine Chemicals, Dalian University of Technology [KF2005]
- Fundamental Research Funds for the Central Universities [JUSRP52004B, JUSRP12033]
- Jiangsu Agriculture Science and Technology Innovation Fund [CX (20) 3108]
- [1046010241211400]
This study reports an efficient photocatalyst, BiPO4, for the production of H2O2 from non-sacrificial systems. The photocatalyst exhibits high activity and stability, and has a core-shell structure with a monoclinic BiPO4 core and a hexagonal BiPO4 shell. The core provides the necessary driving force for H2O2 production, while the shell prevents overreaction by adsorbing water and oxygen instead of H2O2.
Photocatalytic H2O2 production from H2O and O-2 is a sustainable alternative to the present anthraquinone process, but most available systems need sacrificial reagents to maintain continuous activity. In this work, BiPO4 photocatalyst is reported to produce H2O2 efficiently from non-sacrificial systems. The photocatalyst exhibits H2O2 production activity as high as 12.0 mM/h/g and negligible decay for 40 cycles (ca. 200 h) with only H2O and O-2. The photocatalyst is demonstrated to show a core-shell structure. The monoclinic BiPO4 core exhibits a wide bandgap of 3.85 eV, supplying sufficient driven force for photogenerated e(-) and h(+) to produce H2O2. More importantly, instinct hydrate voids in coated hexagonal BiPO(4 )cause strong adsorption with H2O and O-2 rather than H2O2 via the steric hindrance effect, which facilitates the diffusion of H2O2 away from the active photo -catalyst surface, avoiding its overreaction. The findings may help to design more efficient and stable photo -catalysts for H2O2 production in the future.
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