【摘要】 通过两步法合成了一种新颖的NiO/SrTiO_3-x异质结光催化剂,首先,通过高温固相法合成不同Ti³⁺自掺杂的SrTiO_3-x,再利用浸渍法合成NiO/SrTiO_3-x异质结。X射线衍射（XRD）、扫描电镜（SEM）、X射线光电子能谱（XPS）和紫外可见漫反射（UV-vis-DRS）等仪器被系统的用来表征SrTiO_3-x和NiO/SrTiO_3-x异质结,并对它们的物理化学性质进行分析。在可见光条件下用罗丹明B来考察样品的光催化活性,研究表明NiO/SrTiO_3-x具有优异的光催化性能,远远优于Ti³⁺自掺杂的SrTiO_3-x。而且,NiO/SrTiO_3-x异质结的循环实验结果表明该材料不仅具有高效的光催化剂性能,而且还拥有良好的稳定性。更多还原

【Abstract】 A novel heterogeneous photocatalysts NiO/SrTiO_3-x heterostructure was fabricated by two steps. First, a series of Ti³⁺ self-doped SrTiO_3-x were prepared by high temperature solid state reaction. Second, NiO/SrTiO_3-x heterostructure was hybridized by impregnation method. X-ray diffraction（XRD）, Scanning electron microscopy（SEM）, X-ray photoelectron spectroscopy（XPS） and UV-vis diffuse reflection spectroscopy（UV-vis） were systematically used to confirm the successful fabrication of the Ti³⁺ self-doped SrTiO_3-x and NiO/self-doped SrTiO_3-x, as well as analysis of their physicochemical properties. The investigation of photocatalytic ability proved that the self-doped NiO/SrTiO_3-x heterostructure composites showed excellent photocatalytic activities for the decomposition of RB solution under visible light irradiation, being superior to that of SrTiO_3-x. Besides, the recycling experiment of self-doped NiO/SrTiO_3-x heterostructure had been done, demonstrating that it has high efficiency and stability.更多还原