溶胶凝胶法制备BaZrO3:Mg2+/TiO2复合物及光催化性能的研究

	溶胶凝胶法制备BaZrO3:Mg2+/TiO2复合物及光催化性能的研究
Alternative Title	Sol-gel Synthesis of BaZrO3:Mg2+/TiO2 and its photocatalytic activity
	马新龙
Thesis Advisor	李慧慧
	2013-05-20
Degree Grantor	兰州大学
Place of Conferral	兰州
Degree Name	学士
Keyword	发光蓝紫色长余辉包覆复合物光催化
Abstract	本论文报道了通过溶胶凝胶法制备BaZrO3:Mg2+/TiO2复合物，并对其光催化性能做了研究。首先通过高温固相法制备出了具有钙钛矿结构的掺镁锆酸钡，观察到很强的蓝紫色长余辉，衰减曲线显示了该样品的余辉衰减性能。另一方面，纳米尺寸的二氧化钛通过溶胶凝胶法成功制得。然后，掺镁锆酸钡与二氧化钛的复合物通过制备二氧化钛的方法，即溶胶凝胶方法制得。通过测试X射线衍射、扫描电镜、透射电镜来表征样品，发现二氧化钛被成功得包覆在掺镁锆酸钡的表面。最后，测试了制得的复合物在不同条件下的光催化降解情况，结果表明BaZrO3:Mg2+/TiO2复合物不仅在光照后在黑暗中具有一定的光催化活性，在紫外光照射下的光催化性能也有所提升。故掺镁锆酸钡可以作为一种很有潜力的光催化剂激发中心。
Other Abstract	This paper reports the synthesis of the composite BaZrO3:Mg2+/TiO2 prepared by sol-gel method and the photocatalytic activity of this composite is measured. Firstly, the novel Mg-doped BaZrO3 materials with perovskite structure are synthesized by solid state reaction. The intense violet-blue long lasting phosphorescence are observed. Decay curves depict the performance of Mg-doped BaZrO3 materials. Meanwhile, the TiO2 nanoparticles are synthesized successfully by sol-gel method and then the BaZrO3:Mg2+/TiO2 composites are synthesized by sol-gel method and characterized by X-ray diffraction pattern (XRD), transmission electron microscopy (TEM). It is found that TiO2 is successfully coated on the surfaces of BaZrO3:Mg2+ samples. The photocatalytic properties of this as-prepared composites are also measured and the results indicate that the composite BaZrO3:Mg2+/TiO2 not only shows a little photocatalytic activity in dark after irradiated by UV light but also performs better photocatalytic activity under UV light than pure TiO2. Therefore, it exhibits the possibility for BaZrO3:Mg2+ to be a promising candidate for applications in excitation source for photo-catalyst which important role the phosphor plays.
URL	查看原文
Language	中文
Document Type	学位论文
Identifier	https://ir.lzu.edu.cn/handle/262010/229453
Collection	物理科学与技术学院
Recommended Citation GB/T 7714	马新龙. 溶胶凝胶法制备BaZrO3:Mg2+/TiO2复合物及光催化性能的研究[D]. 兰州. 兰州大学,2013.

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