| 多壁碳纳米管修饰的CdS/TiO2复合光催化材料的制备及其光解水制氢特性 |
| Preparation and Photocatalytic Hydrogen Evolution Performance of MWCNTs Modified CdS/TiO2 Composites |
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| 摘要: 以P25 TiO2(德国Degussa化学公司)粉末为原料采用溶胶-凝胶法制备了含有不同CdS质量分数的复合光催化剂，利用多壁碳纳米管(MWCNTs)对CdS/TiO2进行修饰，制备了一系列不同CdS含量的MWCNTs/CdS/TiO2光催化材料。对所得的光催化剂进行了扫描电镜、低温氮吸附-脱附及光解水制氢活性的表征。研究了MWCNTs对CdS/TiO2催化剂体系光解水制氢活性的影响。结果表明，MWCNTs的引入均使得光解水产氢量(14.0 μmol)增加，与未加入MWCNTs的复合光化剂产氢量(11.6 μmol)相比，平均产氢率增加了18%，最高可达21%。 |
| 关键词: 溶胶-凝胶 TiO2 光催化 产氢 CdS MWCNTs |
| 基金项目: |
| Abstract: The CdS/TiO2 photocatalytic composites containing different amounts of CdS were fabricated using sol-gel method with P25 TiO2 as the raw material. The obtained CdS/TiO2 was further modified by multi-wall carbon nanotubes(MWCNTs). The as-synthesized MWCNTs/CdS/TiO2 photocatalytic composites were characterized by scanning electron microscopy, low temperature nitrogen adsorption-desorption(BET surface area) and hydrogen evolution from water photo-splitting. The influence of MWCNTs on the photocatalytic hydrogen evolution performance for CdS/TiO2 catalysts was investigated using Na2S-Na2SO3 as a sacrificial electron donor under UV-Vis light irradiation. It is found that hydrogen production(14.0 μmol) from water photo-splitting can be enhanced by introducing MWCNTs into CdS/TiO2 composites, in comparison to CdS/TiO2 photocatalysts(11.6 μmol). The average hydrogen production rate can be improved by 18% and the highest rate improvement can be up to 21%. |
| Keywords: sol-gel TiO2 photocatalyst hydrogen evolution CdS MWCNTs |
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| 摘要点击次数: 2033 |
| 全文下载次数: 1970 |
| 李浩鹏,张晓艳,崔晓莉.多壁碳纳米管修饰的CdS/TiO2复合光催化材料的制备及其光解水制氢特性[J].无机化学学报,2009,25(11):1935-1938. |
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