期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 11, 页码 10499-10508出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b02508
关键词
BiOBr; Monolayered nanosheets; Liquid-phase exfoliation; Photodegradation; CO2 reduction
资金
- National Natural Science Foundations of China [51672258, 51572246]
- Fundamental Research Funds for the Central Universities [2652015296]
Monolayered photocatalytic materials have attracted huge research interests in terms of their large specific surface area and ample active sites. Sillen-structured layered BiOX (X = Cl, Br, I) casts great prospects owing to their strong photo-oxidation ability and high stability. Fabrication of monolayered BiOX by a facile, low-cost, and scalable approach is highly challenging and anticipated. Herein, we describe the large-scale preparation of monolayered BiOBr nanosheets with a thickness of similar to 0.85 nm via a readily achievable liquid-phase exfoliation strategy with assistance of formamide at ambient conditions. The as-obtained monolayered BiOBr nanosheets are allowed diverse superiorities, such as enhanced specific surface area, promoted band structure, and strengthened charge separation. Profiting from these benefits, the advanced BiOBr monolayers not only show excellent adsorption and photodegradation performance for treating contaminants, but also demonstrate a greatly promoted photocatalytic activity for CO, reduction into CO and CH4. Additionally, monolayered BiOI nanosheets have also been obtained by the same synthetic approach. Our work offers a mild and general approach for preparation of monolayered BiOX, and may have huge potential to be extended to the synthesis of other single-layer two-dimensional materials.
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