硫掺杂TiO2/Ti光电极制备及其可见光光电催化性能

为了提高TiO2/Ti光电极在可见光下的光电催化活性,采用阳极氧化法制备了一种新型的硫掺杂TiO2/Ti光电极.采用扫描电子显微镜、X射线衍射、X射线荧光光谱等技术对光电极进行了表面形貌、结晶形态、晶粒尺寸、硫的掺杂量和价态以及吸光性能表征.研究表明:硫掺杂TiO2/Ti光电极的最佳制备条件为:成膜电压160V、电流密度100mA/cm2、Na2SO3质量浓度750mg/L;所制备的光电极具有良好的光电催化氧化降解邻苯二甲酸二甲酯活性,并能有效地矿化其中间产物;与TiO2/Ti电极相比,硫的掺杂可以显著提高其在可见光下的光电催化性能.     

扎龙湿地生态需水量研究

在分析湿地生态需水量计算方法的基础上,结合扎龙湿地的实际情况,计算扎龙湿地的生态需水量。计算所得扎龙湿地最小、适宜、理想生态需水量标准分别为2.08×10^8m^3、5.55×10^8m^3、7.00×10^8m^3。     

Kinetics of photoelectrocatalytic degradation of endocrine disrupting chemicals using sulfur-doped TiO2 /Ti photoelectrodes

In this study,sulfur-doped TiO2 /Ti photoelectrodes were prepared by anodization. The morphology, crystalline structure,composition of sulfur-doped TiO2 /Ti film and light absorption property were examined by SEM,XRD,XRF,XPS and UV/VIS respectively. Dimethyl phthalate( DMP) ,one kind of environmental disrupting chemicals( EDCs) ,was degraded by the optimized photoelectrodes. Power of xenon light,initial concentration of DMP,photoelectrocatalytic( PEC) area of photoelectrode and bias were investigated in the study on kinetics of PEC degradation of DMP. Hence,this study concluded that the optimum conditions were power of xenon light 150 W,initial concentration of DMP 1 mg/L,PEC area of sulfur-doped TiO2 /Ti photoelectrode 10 cm2,bias 1. 3 V in the PEC reaction system.