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Updated: May 22, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

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Published on: August 7, 2018

A red metallic oxide photocatalyst.

Xiaoxiang Xu¹, Chamnan Randorn, Paraskevi Efstathiou

¹School of Chemistry, EaSTChem, University of St Andrews, St Andrews, Fife KY16 9ST, UK.

Nature Materials

|May 1, 2012

Summary

This study shows red metallic oxide, strontium niobium oxide (Sr(1-x)NbO3), effectively acts as a photocatalyst. It drives visible-light-driven methylene blue oxidation and water splitting, opening new avenues for light harvesting applications.

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Published on: February 11, 2016

Area of Science:

Materials Science
Photocatalysis
Solid-State Chemistry

Background:

Semiconductors utilize bandgap light absorption for applications like photovoltaics and photocatalysis.
Metals, lacking a bandgap, can still exhibit light absorption and coloration, raising questions about their potential in light harvesting.
High conductivity in metals can hinder photocarrier separation, but high carrier mobility might aid kinetic separation.

Purpose of the Study:

To investigate the potential of colored metallic oxides as photocatalysts.
To demonstrate the photocatalytic activity of strontium niobium oxide (Sr(1-x)NbO3) under visible light.
To explore its application in degrading organic pollutants and splitting water.

Main Methods:

Synthesis and characterization of the red metallic oxide Sr(1-x)NbO3.
Photocatalytic degradation of methylene blue under visible light irradiation.
Visible-light-driven water oxidation and reduction using Sr(1-x)NbO3 with sacrificial agents.

Main Results:

Sr(1-x)NbO3 demonstrated effective photocatalytic activity under visible light.
The material successfully catalyzed the oxidation of methylene blue.
Photocatalytic oxidation and reduction of water were achieved with Sr(1-x)NbO3.

Conclusions:

Colored metallic oxides, specifically Sr(1-x)NbO3, can function as effective photocatalysts.
This finding expands the scope of materials for light harvesting and photocatalytic applications.
Sr(1-x)NbO3 shows promise for visible-light-driven environmental remediation and energy conversion.