Preparation, characterization, and enhanced photocatalytic hydrogen evolution activity of Y 2 Cu 2 O 5 -based compounds under simulated sunlight irradiation
Preparation, characterization, and enhanced photocatalytic hydrogen evolution activity of Y 2 Cu 2 O 5 -based compounds under simulated sunlight irradiation
复制标题
DOI：
10.1155/2013/852139
复制
发表时间：
2013
影响因子：
--
通讯作者：
Li Zhang;Jian-hui Yan;Minjie Zhou;Younian Liu
中科院分区：
文献类型：
--
作者：
Li Zhang;Jian-hui Yan;Minjie Zhou;Younian Liu
通过固相反应成功制备了Y2Cu2O5光催化剂，并分别通过溶胶-凝胶法和固相法与TiO2结合。为了比较，我们用氢还原法制备了Pt- y2cu2o5。采用热重和差热分析（TG/DTA）、x射线衍射（XRD）、紫外-可见漫反射光谱（UV-visDRS）和扫描电镜（SEM）对样品进行了表征。在模拟阳光照射下，在草酸水溶液中评价了所得样品的光催化析氢活性。考察了光催化剂浓度、TiO2含量和复合方式对制备的光催化剂析氢活性的影响。结果表明，当光催化剂浓度为0.8 g L-1时，溶胶-凝胶法制备的TiO2- y2cu2o5复合光催化剂表现出最佳的光催化活性，当TiO2含量为30 wt.%时，H2产率为4.35mmol h-1g-1。
Y2Cu2O5 photocatalyst was successfully prepared via solid state reaction and further combined with TiO2 by a sol-gel method and a solid phase method, respectively. For comparison, Pt particles were loaded to prepare Pt-Y2Cu2O5 via a hydrogen reduction method. All the samples were characterized by thermogravimetry and differential thermal analysis (TG/DTA), X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (UV-visDRS), and scanning electron microscopy (SEM) techniques. Photocatalytic H2 evolution activities of the as-obtained samples were evaluated from aqueous oxalic acid solution under simulated sunlight irradiation. The effects of photocatalyst concentration, TiO2 content, and composite method on the H2 evolution activities of the as-obtained photocatalysts were investigated. The results show that, when the concentration of photocatalyst is 0.8 g L-1, the TiO2-Y2Cu2O5 composite photocatalyst prepared by a sol-gel method exhibits the optimized photocatalytic activity, and the H2 production rate is 4.35mmol h-1g-1 with 30 wt.% content of TiO2.