物理化学学报 >> 2005, Vol. 21 >> Issue (01): 84-88.doi: 10.3866/PKU.WHXB20050117

研究简报 上一篇    下一篇

CoO/SrTiO3的合成及光催化分解水制氢性能

王桂赟;王延吉;赵新强;宋宝俊   

  1. 河北工业大学化工学院,天津 300130
  • 收稿日期:2004-05-21 修回日期:2004-07-21 发布日期:2005-01-15
  • 通讯作者: 王延吉 E-mail:yjwang@hebut.edu.cn

Synthesis and Properties of CoO/SrTiO3 for the Photocatalytic Decomposition of Water

WANG Gui-Yun;WANG Yan-Ji;ZHAO Xin-Qiang;SONG Bao-Jun   

  1. College of Chemical Engineering, Hebei University of Technology, Tianjin 300130
  • Received:2004-05-21 Revised:2004-07-21 Published:2005-01-15
  • Contact: WANG Yan-Ji E-mail:yjwang@hebut.edu.cn

摘要: 通过添加碱金属化合物矿化剂,以Sr(NO3)2和钛酸四丁酯的水解产物TiO(OH)2为原料进行固态反应,制得结晶完整性较好的SrTiO3粉末.再由浸渍法负载CoO,制备出光催化分解水催化剂CoO/SrTiO3,在400 W高压汞灯照射下,产氢速率可达到480μmol•g cat-1•h-1. SEM、UV-Vis漫反射光谱表征结果显示,合成SrTiO3时加入KOH矿化剂可使固态反应完全,SrTiO3结晶完整性提高,进而促进其光催化活性提高.确定了适宜的KOH矿化剂用量为2.0%(w).

关键词: 光催化, 钛酸锶, 分解水, 结晶完整性

Abstract: SrTiO3 powder with high crystal perfection was synthesized by solid-state reaction of strontium nitrate with TiO(OH)2 formed by hydrolysis of tetra-butoxy titanium in the presence of alkali metal compound mineralizer. Then a photocatalyst, CoO/SrTiO3, was prepared by impregnation method. The effect of the mineralezers is decreased in the following order :KOH > NaOH > NaNO3 > KNO3.The photocatalytic activity of CoO/SrTiO3,was increased for ca.8 times when KOH mineralizer was added, with the irradiation of 400 W high-pressure mercury lamp, the hydrogen-generation rate amounts to 480 μmol•g cat-1•h-1 over the CoO/SrTiO3,catalyst.Characterization results from SEM and UV-Vis diffuse reflection spectra analysis show that the solid-state reaction for synthesizing SrTiO3 proceeds completely and the crystal perfection of SrTiO3 is improved by adding KOH mineralizer. The suitable amount of KOH is 2.0%(w).

Key words: Photocatalysis, Strontium titanate, Water decomposition, Crystal perfection