Improvement of visible light photocatalytic acetaldehyde decomposition of bismuth vanadate/silica nanocomposites by cocatalyst loading

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• 作者：Naoya Murakami ; Naohiro Takebe ; Toshiki Tsubota ; Teruhisa Ohno ; ^{tohno@che.kyutech.ac.jp}
• 关键词：Visible-light responsive photocatalyst ; Bismuth vanadate ; Silica ; Reduction cocatalyst
• 刊名：Journal of Hazardous Materials
• 出版年：2012
• 出版时间：15 April, 2012
• 年：2012
• 卷：211-212
• 期：Complete
• 页码：83-87
• 全文大小：694 K

文摘

Photocatalytic activity of bismuth vanadate (BiVO₄) for acetaldehyde decomposition under visible light irradiation was improved by inclusion of a nanocomposition of silica as an adsorbent material and loading of platinum (Pt) or trivalent iron ion (Fe³⁺) as reduction cocatalysts. Addition of silica enhanced photocatalytic activity due to improvement of adsorption ability, but total decomposition of acetaldehyde was not observed within 24 h of visible light irradiation. For further improvement of photocatalytic activity, BiVO₄ with an optimized amount of silica composition were modified with Pt or Fe³⁺. Photodeposition of Pt greatly increased photocatalytic activity, and acetaldehyde was totally decomposed within 24 h of visible light irradiation.