| TiO2/石墨烯复合材料的合成及光催化分解水产氢活性 |
| Preparation and Photocatalytic Activity for Hydrogen Evolution of TiO2/Graphene Sheets Composite |
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| 摘要: 利用石墨粉根据Hummers氧化法制得氧化石墨，并进一步还原得到石墨烯。采用溶胶-凝胶法以钛酸四丁酯和石墨烯为起始材料制备了二氧化钛(TiO2)和石墨烯的复合光催化材料。研究了该复合材料在紫外-可见光以及可见光条件下的光催化分解水制氢活性。结果表明，紫外-可见光照射下，TiO2/石墨烯复合光催化材料的光催化分解水产氢速率为8.6 μmol·h-1，远大于同条件下商业P25的产氢速率 (4.5 μmol·h-1)，光解水产氢活性提高了近2倍；可见光下光照3 h，TiO2/石墨烯复合材料的光催化分解水产氢量约为0.2 μmol。 |
| 关键词: 石墨烯 二氧化钛 光解水 产氢 |
| 基金项目: |
| Abstract: Graphene sheets (GSs) were prepared by reduction of graphite oxide (GO), which was obtained from oxidation of graphite powder by Hummers′ method. The composite of titanium dioxide/graphene sheets (TiO2/GSs) was synthesized using tetrabutyl titanate and GSs as the starting materials by a sol-gel method. The photocatalytic activity for hydrogen evolution of TiO2 /GSs was evaluated from water photo-splitting under ultraviolet-visible (UV-Vis) and visible light illumination, respectively. The results showed that the as-prepared TiO2 /GSs composite exhibited a hydrogen evolution rate of 8.6 μmol·h-1 under UV-Vis light irradiation, nearly two times larger than that of P25 (4.5 μmol·h-1). Total hydrogen amount about 0.2 μmol was observed within 3 h under visible light illumination for the as-prepared TiO2/GSs composite. |
| Keywords: graphene TiO2 water photo-splitting hydrogen production |
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| 张晓艳,李浩鹏,崔晓莉.TiO2/石墨烯复合材料的合成及光催化分解水产氢活性[J].无机化学学报,2009,25(11):1903-1907. |
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