醇类在Pt-TiO2纳米管上的光催化制氢

doi:10.3969/j.issn.0438-1157.2013.09.021

化工学报 ›› 2013, Vol. 64 ›› Issue (9): 3228-3234.DOI: 10.3969/j.issn.0438-1157.2013.09.021

• 催化、动力学与反应器 • 上一篇下一篇

醇类在Pt-TiO₂纳米管上的光催化制氢

涂盛辉, 巫辉, 梁海营, 万金保, 杜军

南昌大学环境与化学工程学院, 江西南昌 330031

收稿日期:2013-01-11 修回日期:2013-06-20 出版日期:2013-09-05 发布日期:2013-09-05
通讯作者: 涂盛辉(1964- ),男,副教授
作者简介:涂盛辉(1964- ),男,副教授。
基金资助:
国家自然科学基金项目(51162022)。

Hydrogen production by alcohols photocatalysis on Pt-TiO₂/nanotubes

TU Shenghui, WU Hui, LIANG Haiying, WAN Jinbao, DU Jun

College of Environment and Chemistry Engineering, Nanchang University, Nanchang 330031, Jiangxi, China

Received:2013-01-11 Revised:2013-06-20 Online:2013-09-05 Published:2013-09-05
Supported by:
supported by the National Natural Science Foundation of China(51162022).

摘要/Abstract

摘要： 采用溶胶-凝胶法(sol-gel)、水热法和光沉积法制备了铂(Pt)负载量为0.5%的二氧化钛纳米管催化剂(TNT),并利用甲醇等醇类制氢。结果表明,所制备的催化剂具有良好的管状形貌;甲醇(CH₃OH)和水在同等数量级上共同吸附在催化剂表面9 h后制氢效率最高,核磁共振氢谱(¹H NMR)分析表明甲醇裂解制氢过程在催化剂表面进行,因氢键束缚产生的过渡产物无法脱附直至形成CO₂;醇类碳链长度、支链数目、羟基数目以及苯环基团等都对醇类制氢有着不同的影响,制氢过程中醇分子与催化剂的吸附作用强弱和醇分子被羟基植入的难易程度是制氢效果差异的主要原因。

关键词: 二氧化钛纳米管, 光催化, 醇, 制氢

Abstract: Sol-gel,hydrothermal and photoassisted platinum deposition methods were used to prepare Pt(0.5%)-TiO₂/nanotube catalysts.The results show that catalysts are of ideal tubular morphology and large specific surface area.The highest efficiency of hydrogen production appears when the co-adsorption of methanol and water on the catalyst is at the same order of magnitude after 9 h.The results obtained by ¹H NMR reveal that methanol molecules are cracked on the catalyst surface,and the transitional products can not be desorbed because of the shackles of hydrogen bonds until CO₂ formation.The length of carbon chain,number of branched chains,number of —OH and benzene ring groups on alcohol molecules are of different effects on hydrogen production.The strong or weak adsorption of alcohols on catalysts,and easy or difficult hydroxyl implantation into alcohol molecules can be used to explain these differences.

Key words: titanium dioxide nanotube, photocatalytic, alcohols, hydrogen production

中图分类号:

TQ032

涂盛辉, 巫辉, 梁海营, 万金保, 杜军. 醇类在Pt-TiO₂纳米管上的光催化制氢[J]. 化工学报, 2013, 64(9): 3228-3234.

TU Shenghui, WU Hui, LIANG Haiying, WAN Jinbao, DU Jun. Hydrogen production by alcohols photocatalysis on Pt-TiO₂/nanotubes[J]. CIESC Journal, 2013, 64(9): 3228-3234.

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醇类在Pt-TiO₂纳米管上的光催化制氢

Hydrogen production by alcohols photocatalysis on Pt-TiO₂/nanotubes

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