可见光响应型HCa_2TaNb_2O_(10)/(Pb_(1-x)Zn_xS)的微波法制备及其光催化性能研究

Preparation of Visible-light-driven HCa_2TaNb_2O_(10)/(Pb_(1-x)Zn_xS)via a Microwave Method and Its Photocatalytic Properties

通过微波辅助法和传统制备方法分别合成了可见光响应的光催化剂HCa2TaNb2O10/(Pb1-x ZnxS)。采用扫描电子显微镜(SEM)、X射线衍射(XRD)、紫外-可见光漫反射光谱(UV-Vis DRS)等方法对样品进行了表征,考察了样品在300W氙灯下的光催化制氢活性。研究结果表明微波辅助法所制备的样品产氢量为384μmol/(g·h),高于传统方法制备的样品,而且微波辅助法制备复合催化剂大大简化了制备步骤,缩短了时间。

A visible-light-driven heterogeneous photocatalyst HCa2TaNb2O10/（Pb1-xZnxS） was fabricated by conventional preparation method and microwave-assisted method,respectively.The physicochemical properties of the photocatalysts were analyzed by scanning electron microscope （SEM）,X-ray diffraction （XRD）,and ultraviolet-visible diffuse reflection spectra （UV-Vis DRS）.The photocatalytic activity of the as-prepared samples were evaluated by photocatalytic H2 production in an aqueous solution containing SO3 2-and S2-as a sacrificial agent under 300 W xenon lamp irradiation.The hydrogen evolution of HCa2TaNb2O10 / （Pb1-xZnx S） prepared via microwave-assisted method was up to 384 μmol/（g · h）,which was higher than that of as-prepared sample prepared via conventional way.Furthermore,the complex preparation process and lengthy time was simplified and shortened greatly.