Research on photocatalytic H2 production from acetic acid solution by Pt/TiO2 nanoparticles under UV irradiation
Research on photocatalytic H2 production from acetic acid solution by Pt/TiO2 nanoparticles under UV irradiation
复制标题
DOI：
10.1016/j.ijhydene.2009.09.019
复制
发表时间：
2009-11
影响因子：
7.2
通讯作者：
Xian-Jun Zheng;Li-Fang Wei;Zhihong Zhang;Qiaoya Jiang;Yongan Wei;Bing Xie;Ming-Bao Wei
中科院分区：
文献类型：
--
作者：
Xian-Jun Zheng;Li-Fang Wei;Zhihong Zhang;Qiaoya Jiang;Yongan Wei;Bing Xie;Ming-Bao Wei
通过在tio2表面光沉积Pt制备了Pt/ tio2粒子，并用x射线衍射对其进行了表征。研究了Pt/ tio2水溶液中醋酸（HAc）在室温下紫外辐射下的光催化制氢反应。系统地研究了Pt负载、光催化剂浓度、HAc浓度和溶液pH等操作变量的影响。Pt/ tio2在HAc中产h22的最佳工艺条件为Pt负载1.0wt。%， Pt/ tio2浓度0.22g/L， HAc浓度6.52g/L, pH 1.0。在长时间辐照下，h2产率为0.27mol-H2/mol-HAc。实验结果表明，在tio2表面沉积适量的Pt可显著提高光催化产氢活性。基于我们的研究结果，可以通过将发酵制氢和光催化制氢耦合来实现生物质制氢的新工艺。该工艺还提供了一种降解有机污染物同时产氢的方法。提出了在Pt/ tio2上光催化分解HAc的可能机理。
The Pt/TiO2particles have been prepared by the photodeposition of Pt on TiO2surface and characterized by X-ray diffraction. Photocatalytic H2production from acetic acid (HAc) over Pt/TiO2in aqueous solution has been studied at ambient temperature under UV irradiation. The effects of operational variables such as Pt loading, photocatalyst concentration, HAc concentration, and solution pH, have been systematically investigated. The optimum conditions for H2production from HAc by Pt/TiO2were Pt loading 1.0wt.%, Pt/TiO2concentration 0.22g/L, HAc concentration 6.52g/L and pH 1.0. The H2yield is 0.27mol-H2/mol-HAc obtained under prolonged time irradiation. Experimental results showed that the photocatalytic H2production activity could be enhanced remarkably by depositing a suitable amount Pt on TiO2surface. Based on our results, a new process for H2production from biomass can be achieved by coupling fermentative H2production with photocatalytic H2production. The process also provides a method for degradation of organic pollutants with simultaneous H2production. A possible mechanism for photocatalytic decomposition of HAc over Pt/TiO2was also proposed.