Synthesis of p-Co₃O₄/n-TiO₂ Nanoparticles for Overall Water Splitting under Visible Light Irradiation.
Synthesis of p-Co₃O₄/n-TiO₂ Nanoparticles for Overall Water Splitting under Visible Light Irradiation.
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可见光照射下全分解水的 p-Co3O4/n-TiO2 纳米颗粒的合成
DOI：
10.3390/nano6080138
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发表时间：
2016-07-27
期刊：
影响因子：
--
通讯作者：
Sang S
中科院分区：
文献类型：
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作者：
Zhang Q;Hai Z;Jian A;Xu H;Xue C;Sang S
本文采用碳辅助法和溶胶-凝胶法制备了纳米光催化材料p-Co3O4/n-TiO2光催化剂(~400 nm)。本文还研究了可见光照射下p-Co3O4/n-TiO2纳米复合助催化剂在整体纯水裂解制氢和制氧中的应用。另外，p-Co3O4/n-TiO2纳米复合材料的析氢速率比纯Co3O4纳米复合材料的析氢速率高25%。此外，根据表征结果，提出了可见光催化分解水的方案，纳米复合材料的Co3O4被可见光激发，Co3O4的导带和TiO2价带上存在的光生电子和空穴使H2和O2的光催化分解效率更高。H_2和O_2的最佳析出速率分别为8.16μ/h·g和4.0μ/h·g。
p-Co3O4/n-TiO2 nanoparticles (~400 nm) for photocatalysis were prepared via carbon assisted method and sol-gel method in this work. The paper also studied the application of visible light illuminated p-Co3O4/n-TiO2 nanocomposites cocatalyst to the overall pure water splitting into H2 and O2. In addition, the H2 evolution rate of the p-Co3O4/n-TiO2 nanocomposites is 25% higher than that of the pure Co3O4 nanoparticles. Besides, according to the results of the characterizations, the scheme of visible light photocatalytic water splitting is proposed, the Co3O4 of the nanocomposites is excited by visible light, and the photo-generated electrons and holes existing on the conduction band of Co3O4 and valence band of TiO2 have endowed the photocatalytic evolution of H2 and O2 with higher efficiency. The optimal evolution rate of H2 and O2 is 8.16 μmol/h·g and 4.0 μmol/h·g, respectively.