Photocatalytic Applications of Bismuth Tungstate Nanostructures

Bismuth tungstate (Bi₂WO₆) nanostructures have emerged as a versatile class of visible-light-driven photocatalysts, combining favourable band gaps, layered Aurivillius frameworks and robust chemical stability. A variety of synthesis methods—hydrothermal, solvothermal and bottom-up routes—have yielded morphologies such as hierarchical microspheres, ultrathin nanosheets and nanoplates, each optimised for high surface area and light harvesting. Key strategies to enhance performance centre on promoting charge separation and extending the photoresponse: introduction of oxygen vacancies, transition-metal doping, construction of heterojunctions with co-catalysts (for example MoS₂ or graphene) and surface state engineering via controlled reduction. These modifications suppress electron-hole recombination and accelerate redox reactions at active sites, enabling applications in environmental remediation, water splitting and fine-chemical synthesis. Insights into charge-migration pathways within the layered lattice now guide the rational design of next-generation Bi₂WO₆ catalysts that merge high activity with operational stability under solar irradiation.

Research from Nature Portfolio

Recent studies have reported the bottom-up fabrication of monolayer Bi₂WO₆ nanosheets that form intrinsic heterojunction interfaces across the sandwich-type [BiO]⁺–[WO₄]²⁻–[BiO]⁺ substructure. This monolayer architecture affords coordinatively unsaturated bismuth sites and ultrafast spatial separation of photogenerated holes and electrons, yielding markedly improved solar-energy conversion performance. Another foundational advance has introduced surface oxygen vacancies into Bi₂WO₆ nanoplates by controllable hydrogen-reduction, extending the visible-light response beyond 600 nm and doubling photocatalytic activity relative to pristine material. Together, these studies establish defect engineering and atomic-scale heterojunction design as cornerstones for maximising charge-carrier mobility and catalytic turnover in bismuth tungstate systems.

Photocatalytic Applications of Bismuth Tungstate Nanostructures publication trend

The graph below shows the total number of articles in photocatalytic applications of bismuth tungstate nanostructures across all publications each year (not limited to Nature Index journals).

Technical terms

Photocatalysis: Activation of a material by light to drive chemical transformations via photogenerated charge carriers.

Band gap: Energy difference between the valence and conduction bands determining the wavelengths of light absorbed.

Heterojunction: Interface between two semiconductors with differing band structures that promotes spatial separation of electrons and holes.

Oxygen vacancy: Defect in an oxide lattice where an oxygen atom is missing, creating electronic states that modify optical absorption and carrier dynamics.

Photogenerated carriers: Electrons and holes produced when photons excite electrons across the band gap, initiating redox reactions.

References

1. Recent progress in Bi2WO6‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives. Nano Select (2020).
2. Monolayered Bi2WO6 nanosheets mimicking heterojunction interface with open surfaces for photocatalysis. Nature Communications (2015).
3. Fabrication of Wide–Range–Visible Photocatalyst Bi2WO6−x nanoplates via Surface Oxygen Vacancies. Scientific Reports (2016).
4. Tungsten/bismuth – based catalysts for the degradation of 5-fluorouracil cytostatic drug in water by solar-LED photocatalysis. Environmental Technology & Innovation (2025).
5. Degradation of norfloxacin by copper-doped Bi 2 WO 6 -induced sulfate radical-based visible light-Fenton reaction. RSC Advances (2020).
6. Bismuth-based nanostructured photocatalysts for the remediation of antibiotics and organic dyes. Beilstein Journal of Nanotechnology (2023).
7. Improving Photocatalytic Performance from Bi2WO6@MoS2/graphene Hybrids via Gradual Charge Transferred Pathway. Scientific Reports (2017).