Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensuicho, Tobata, Kitakyushu 804-8550, Japan.
J Hazard Mater. 2012 Apr 15;211-212:83-7. doi: 10.1016/j.jhazmat.2011.12.038. Epub 2011 Dec 19.
Photocatalytic activity of bismuth vanadate (BiVO(4)) 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 (Fe(3+)) as reduction cocatalysts. Addition of silica enhanced photocatalytic activity due to improvement of adsorption ability, but total decomposition of acetaldehyde was not observed within 24h of visible light irradiation. For further improvement of photocatalytic activity, BiVO(4) with an optimized amount of silica composition were modified with Pt or Fe(3+). Photodeposition of Pt greatly increased photocatalytic activity, and acetaldehyde was totally decomposed within 24h of visible light irradiation.
通过将硅纳米复合材料作为吸附材料和负载铂（Pt）或三价铁离子（Fe(3+)）作为还原共催化剂，提高了钒酸铋（BiVO(4)）在可见光照射下分解乙醛的光催化活性。添加硅可提高吸附能力，从而提高光催化活性，但在可见光照射 24 小时内并未观察到乙醛的完全分解。为了进一步提高光催化活性，用优化量的硅组成修饰 BiVO(4)并用 Pt 或 Fe(3+)进行改性。Pt 的光沉积大大提高了光催化活性，在可见光照射 24 小时内，乙醛完全分解。
