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Hydrogen production over Au-loaded mesoporous-assembled SrTiO_3 nanocrystal photocatalyst: Effects of molecular structure and chemical properties of hole scavengers

机译:载金的中孔组装SrTiO_3纳米晶体光催化剂上的产氢:空穴清除剂的分子结构和化学性质的影响

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摘要

The hydrogen production via the photocatalytic water splitting under UV irradiation using different compounds as hole scavengers (including methanol, formic acid, acetic acid, propanoic acid, hydrochloric acid, and sulfuric acid) under a low concentration range (<8 vol.%) was investigated over the 1 wt.% Au-loaded mesoporous-assembled SrTiO_3 nanocrystal photocatalyst. The results indicated that the hydrogen production efficiency greatly depended on the molecular structure, chemical properties, and concentration of the hole scavengers. Formic acid, which is the smallest and completely-dissociated water-soluble carboxylic acid, exhibited the highest hydrogen production enhancement ability. The 2.5 vol.% aqueous formic acid solution system provided the highest photocatalytic hydrogen production rate.
机译:在低浓度范围(<8%(体积))下,使用不同的化合物作为空穴清除剂(包括甲醇,甲酸,乙酸,丙酸,盐酸和硫酸),在紫外线辐射下通过光催化水分解产生的氢气为研究了负载1%(重量)的Au介孔组装的SrTiO_3纳米晶体光催化剂。结果表明,制氢效率很大程度上取决于分子结构,化学性质和空穴清除剂的浓度。甲酸是最小的且完全解离的水溶性羧酸,具有最高的产氢能力。 2.5%(体积)的甲酸水溶液系统提供了最高的光催化制氢速率。

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  • 来源
    《Energy Conversion & Management》 |2011年第5期|p.2256-2261|共6页
  • 作者单位

    The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok 10330, Thailand;

    The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok 10330, Thailand,Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok 10330, Thailand;

    The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok 10330, Thailand,Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok 10330, Thailand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    stronfium titanate; cold loading; sol-gel method; mesoporous assembly; photocatalytic hydrogen production;

    机译:钛酸锶;冷负荷;溶胶-凝胶法;中等组装;光催化制氢;

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