Synthesis and Enhanced Photocatalytic Activity of Rare Earth Ion (Ce 3+ , Nd 3+ , Pr 3+ or Sm 3+ ) Doped Bi 2 WO 6 Microspheres for Rhodamine B Degradation

Bismuth tungstate Bi2WO6: a review on structural, photophysical and photocatalytic properties

This review paper provides a comprehensive overview of the recent trends in bismuth tungstate (Bi₂WO₆) research, covering its structural, electrical, photoluminescent, and photocatalytic properties. The structural characteristics of bismuth tungstate are explored in detail, including its different allotropic crystal structures with respect to its isotypic materials. The electrical properties of bismuth tungstate, such as its conductivity and electron mobility, are also discussed, along with its photoluminescent properties. The photocatalytic activity of bismuth tungstate is a particular focus, with recent advances in doping and co-doping strategies with metals, rare earth and other elements summarized. The limitations and challenges of using bismuth tungstate as a photocatalyst are also examined, such as its low quantum efficiency and susceptibility to photodegradation. Finally, recommendations for future research directions are provided, including the need for further studies on the underlying mechanisms of photocatalytic activity, the development of more efficient and stable bismuth tungstate-based photocatalysts, and the exploration of new applications in fields such as water treatment and energy conversion.

Synthesis of efficient Y-Bi2WO6/G visible light photocatalysts with high stability for pollutant degradation

For effective photocatalytic pollutant degradation on bismuth tungstate (Bi2WO6), it is vital to enhance the photogenerated charge separation and the photochemical stability. Herein, we successfully fabricated yttrium (Y)-Bi2WO6/graphene (G) nanocomposites with a significantly enhanced visible light-driven photocatalytic ability to degrade Rhodamine B compared with the bare Bi2WO6. This is attributed to the remarkably improved visible light absorption capability and photogenerated charge separation after doping yttrium and subsequent coupling with graphene, as revealed by photoluminescence and electrochemical impedance spectroscopies. Moreover, trapping experiments were carried out to clarify that photogenerated ·O2- and holes were the dominant oxidative species in the photocatalytic reaction. In addition, it was confirmed that the resulting composites maintained good photostability and chemical stability during recycling tests. Graphical abstract.