石油化工高等学校学报990103
石油化工高等学校学报
JOURNAL OF PETROCHEMICAL
UNIVERSITIES
1999年 第12卷 第1期 Vol.12 No.1 1999
Keggin结构杂多酸盐作光敏剂
光解水制氢的比较研究*
于大伟
摘 要 杂多酸盐作光敏剂光解水制取氢气，不需外加电子中继物，节省了一个中间环节，对提高量子效率有利，杂多酸盐是一种较好的光解水光敏剂。但是不同的杂多酸盐作光敏剂，产氢效率差异很大，研究造成这种差异的原因，对开发合成产氢效率高的杂多酸盐具有指导意义。在水-甲醇体系中，选用胶体铂作催化剂，300～400nm紫外光照射，研究了15种Keggin结构杂多酸盐作光敏剂光解水制氢，结果表明，杂多酸盐的半波电位是决定其产氢效率高低的主要因素，半波电位介于-0.15～-0.35V之间的杂多酸盐产氢效率较高。
关键词 光解水； 杂多酸盐； 制氢； 光敏剂； 杂多酸； 半波电位
中图分类号 O644.19
Compare Study on Preparing Hydrogen
by Using Heteropolyates with
Keggin Structure as Photosensitizer
Photodecomposition Water
Yu Dawei
(Liaoyang Branch of Fushun Petroleum Institute,
Liaoning Liaoyang 111 003)
Abstract It was unnecessary to add electron relaying material by using heteropolyate as p hotosensitizer to photodecompose water for preparing hydrogen, it saves a middle step and benefits to raise the efficiency of quantum. Heteropolyates is a good kind of photosensitizer for splitting water, but The hydrogen producing efficien cy varies in a large range with different heteropolyates as photosensitizers. Th e research on what makes the difference can direct the work of developing and sy thesizing heteropolyate with high hydrogen producing efficiency. In water-methan ol system, using couoid platinum as catalysist and 300～400 nm ultraviolet rays f ifteen kinds of heteropolyates with Keggin structure have been studied in photod ecomposition water for preparing hydrogen. The results show that self-wave poten tial of heteropolyate is the main factor to determine its hydrogen producing ef ficiency. The hydrogen producing efficiency is higher with the heteropolyates of self-wave potential between -0.15～-0.35 V.
Keywords Photodecomposition water; Heteropolyate； Prep aring hydrogen; Photosensitizer; Heteropoly acid; Self-wave potential
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