The latest research progress of ultrathin bismuth-based materials in the field of photocatalysis in recent years is reviewed,including pollutant degradation,photocatalytic hydrogen evolution,and reduction of carbon dioxide.As an innovative kind of semiconductor photocatalytic material,bismuth-based material is a kind of photocatalyst with moderate band gap,low cost,non-toxic and harmless.Its band gap adjust-ability and morphology adjustability provide the basic conditions for achieving good photocatalytic per-formance under ultrathin structure.The development of visible-light-responsive photocatalysts with two-dimensional layered structures has attracted extensive interest from scholars.Then,various bismuth-based photocatalytic materials that have been extensively studied are briefly introduced.The synthesis and modi-fication methods of ultrathin bismuth-based photocatalysts are summarized,including sonication-assisted liquid exfoliation,ion intercalation-assisted liquid exfoliation,hydro/solvothermal synthesis,atomic layer deposition,etc.The problems existing in the preparation of ultrathin bismuth-based photocatalysts and the potential application value and development trend in the future are prospected.
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