Bismuth vanadate particles and method for producing bismuth vanadate particles

By calcining raw materials to control the particle size of bismuth vanadate particles to 5 μm or less, the method enhances photocatalytic activity, addressing the limitations of conventional bismuth vanadate particles and enabling effective photocatalytic applications.

WO2026138845A1PCT designated stage Publication Date: 2026-07-02DIC CORP +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
DIC CORP
Filing Date
2025-12-24
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Conventional bismuth vanadate particles containing molybdenum exhibit insufficient photocatalytic activity due to challenges in controlling particle size during production, limiting their effectiveness in photocatalytic processes.

Method used

A method involving calcination of raw materials including a molybdenum compound, a vanadium compound, and a bismuth compound to produce bismuth vanadate particles with a controlled average particle size of 5 μm or less, enhancing photocatalytic activity by ensuring a large surface area and specific molybdenum distribution.

Benefits of technology

The produced bismuth vanadate particles demonstrate high photocatalytic activity with a controlled particle size, providing a large surface area and efficient photocatalytic performance in applications such as water treatment and solar energy utilization.

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Abstract

Provided are bismuth vanadate particles containing molybdenum and having an average particle size of 5 μm or less. In the bismuth vanadate particles, it is preferable that the content of molybdenum (M1) in terms of molybdenum trioxide relative to 100 mass% of the bismuth vanadate particles, which is determined by XRF analysis of the bismuth vanadate particles, is 0.001 mass% to 10 mass%. In the bismuth vanadate particles, it is preferable that the content of molybdenum in terms of molybdenum trioxide relative to 100 mass% of the surface layer of the bismuth vanadate particles, which is determined by XPS surface analysis of the bismuth vanadate particles, is 0.1 mass% to 30 mass%.
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