Photocatalytic and photoelectrochemical properties of in situ carbon hybridized BiPO4 films
Photocatalytic and photoelectrochemical properties of in situ carbon hybridized BiPO4 films
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原位碳杂化BiPO4薄膜的光催化和光电化学性能
DOI：
10.1016/j.apcata.2012.05.043
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发表时间：
2012-09-05
影响因子：
5.5
通讯作者：
Zhu, Yongfa
中科院分区：
文献类型：
--
作者：
Lu, Bin;Ma, Xinguo;Zhu, Yongfa
通过在不同温度下在钛衬底上焙烧非晶态复合前驱体薄膜，实现了碳与BiPO4薄膜的原位杂化。在钛衬底表面原位生长出BiPO4微晶，形成BiPO4颗粒。形成的BiPO4颗粒与前驱体焙烧后的残碳原位杂化形成碳杂化的BiPO4薄膜。杂化程度取决于焙烧温度。通过光催化降解亚甲基蓝，考察了不同焙烧温度下碳杂化BiPO4薄膜的光催化活性。结果表明，在400℃下制备的薄膜具有最高的光催化活性，约为550℃时的1.5倍，这可能是由于薄膜中碳的杂化程度较高，薄膜中碳与BiPO4纳米晶之间的光致电子转移效率较高，以及相应的光致电子与空穴的分离效率所致。通过光电化学测量，系统地研究了电子相互作用。(C)2012爱思唯尔B.V.保留所有权利。
In situ hybridization of carbon with BiPO4 films were performed through calcination of amorphous complex precursor films on the Ti substrate under various temperatures. The BiPO4 crystallites were in situ grown into BiPO4 particles on the surface of the Ti substrate. The formed BiPO4 particles in situ hybridized with the residual carbon from precursor calcination to form carbon hybridized BiPO4 films. The extent of hybridization depended on the calcination temperatures. The photocatalytic activities of carbon hybridized BiPO4 films under different calcination temperatures were estimated through photocatalytic degradation of methylene blue. The results indicated that the film prepared at 400 degrees C presented the highest photocatalytic activity, which was about 1.5 times than that of the film at 550 degrees C. This phenomenon could be attributed to the higher carbon hybridization extent, higher transfer efficiency of photo-induced electrons between carbon and BiPO4 crystalline nanoparticles in films, and corresponding separation efficiency of photo-induced electrons and holes. The electronic interaction was also systematically investigated by the photoelectrochemical measurements. (c) 2012 Elsevier B.V. All rights reserved.