Wang Jun, Li Jia, Liu Bin, Xie Yingpeng, Han Guangxi, Li Ying, Zhang Liqun, Zhang Xiangdong
Department of Chemistry, Liaoning University, Shenyang 110036, China.
Water Sci Technol. 2009;60(4):917-26. doi: 10.2166/wst.2009.425.
In this work, an upconversion luminescence agent, crystallized Er(3 + ):YAlO(3), was synthesized and then coated by the nano-sized TiO(2) film through sol-gel technique. A novel TiO(2) photocatalyst, Er(3 + ):YAlO(3)/TiO(2), with high activity in visible light was subsequently prepared. The Er(3 + ):YAlO(3) and Er(3 + ):YAlO(3)/TiO(2) were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). The photocatalytic activity of Er(3 + ):YAlO(3)/TiO(2) photocatalyst was tested by the degradation of acid red B in aqueous solution as the primary model compound under visible light irradiation. The experimental results proved that the prepared TiO(2)-coated crystallized Er(3 + ):YAlO(3) was able to decompose the acid red B efficiently, and it is promising to use the idea to develop new TiO(2) photocatalyst with high activity for photocatalytic degradation under visible light.
在这项工作中，合成了一种晶态的上转换发光剂Er(3 + ):YAlO(3)，然后通过溶胶 - 凝胶技术用纳米尺寸的TiO(2)薄膜对其进行包覆。随后制备了一种新型的在可见光下具有高活性的TiO(2)光催化剂Er(3 + ):YAlO(3)/TiO(2)。通过X射线衍射(XRD)和透射电子显微镜(TEM)对Er(3 + ):YAlO(3)和Er(3 + ):YAlO(3)/TiO(2)进行了表征。以水溶液中的酸性红B作为主要模型化合物，在可见光照射下测试了Er(3 + ):YAlO(3)/TiO(2)光催化剂的光催化活性。实验结果证明，所制备的包覆TiO(2)的晶态Er(3 + ):YAlO(3)能够有效地分解酸性红B，利用该理念开发用于可见光下光催化降解的高活性新型TiO(2)光催化剂具有广阔前景。
