Study on photocatalytic hydrogen production in simulated organic pollutants over cadmium sulfide composite photocatalyst
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摘要: 太阳能光催化分解水制氢是太阳能制氢的最佳途径之一。选择CdS为敏化剂，制备了可见光响应的CdS复合钛酸纳米管光催化剂。以所制备的光催化剂在不同模拟有机污染物中的光催化产氢活性进行研究，对有机物浓度、pH值等反应参数进行了考察，并对其产氢机理进行了分析。研究发现各类有机物中，甲酸溶液中产氢量活性最高。分别考察了10%、20%、30%、40%、50%体积分数的甲酸，其中20%体积分数的甲酸作牺牲剂时产氢活性最高。Abstract: Solar photocatalytic water splitting is one of the best ways for solar hydrogen production. In this paper, CdS is chosen as sensitizer to construct a CdS/titanate nanotube composite semiconductor. Both the concentrations and pH conditions of photocatalytic hydrogen production in different organic agents were investigated. The hydrogen production mechanism was analyzed. It was found that formic acid showed highest activity among various organic agents. Various concentrations with 10%, 20%, 30%, 40% and 50% were investigated and the 20% of formic acid showed best activity.
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Key words:
- organism /
- photocatalysis /
- oxide semiconductor /
- hydrogen
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