Photocatalytic properties of upconversion composite film Pr3+: Y2SiO5/TiO2

被引：0
作者：
Xia, Guangzhi [1 ]
Mao, Ping [1 ]
Li, Yan [2 ]
Yang, Yi [1 ]
机构：
[1] School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
[2] School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
来源：
Huagong Xuebao/CIESC Journal | 2015年 / 66卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Composites; Degradation; Membranes; Photocatalytic; Sol-gel method; Upconversion material;
D O I：
10.11949/j.issn.0438-1157.20141606
中图分类号：
学科分类号：
摘要：
To address the disadvantage of suspended phase TiO2 powder which is difficult to separate and recycle in the treatment of liquid pollutants and to further improve utilization of solar energy by TiO2, Pr3+:Y2SiO5 powder, TiO2 membrane and Pr3+:Y2SiO5/TiO2 composite membranes were prepared via the sol-gel method. XRD and SEM were used to characterize the properties of the samples. The relationship between efficiency of photocatalytic degradation of methylene blue by Pr3+:Y2SiO5/TiO2 composite membrane and number of coating layers was investigated. Degradation rate could be as high as 96.43% with five coating layers of Pr3+:Y2SiO5/TiO2 composite membrane, and the second and third degradation rates were 82.46% and 74.94%, respectively. With increasing area of Pr3+:Y2SiO5/TiO2 composite membranes, degradation rate increased for a period of time then decreased finally. Degradation rate could be as high as 96.43% with eight coating layers of the membrane. Degradation rate would increase to 96.18% when illumination intensity reached 100 W. However, degradation rate decreased evidently with the increase of initial concentration of pollutions. ©, 2015, Chemical Industry Press. All right reserved.
引用
收藏
页码：1607 / 1614
页数：7
相关论文
共 27 条
  • [1] Tong H., Ouyang S., Bi Y., Umezawa N., Oshikiri M., Ye J.H., Nano-photocatalytic materials: Possibilities and challenges, Advanced Materials, 24, pp. 229-251, (2012)
  • [2] Kumar S.G., Devi L.G., Review on modified TiO<sub>2</sub> photocatalysis under UV/visible light: Selected results and related mechanisms on interfacial charge carrier transfer dynamics, Journal of Physical Chemistry A, 115, pp. 13211-13241, (2011)
  • [3] Yang Y., Xia G., Liu C., Zhang J., Wang L., Effect of Li(I) and TiO<sub>2</sub> on the upconversion luminance of Pr<sup>3+</sup>: Y<sub>2</sub>SiO<sub>5</sub> and its photo degradation on nitrobenzene wastewater, Journal of Chemistry, (2015)
  • [4] Froschl T., Hormann U., Kubiak P., Kucerova G., Pfanzelt M., Weiss C.K., Behm R.J., Husing N., Kaiser U., Landfester K., High surface area crystalline titanium dioxide: Potential and limits in electrochemical energy storage and catalysis, Chem. Soc. Rev., 41, pp. 5313-5360, (2012)
  • [5] Hagfeld A., Gratzel M., Light-induced redox reactions in nanocrystal line systems, Chem. Rev., 95, 1, pp. 49-68, (1995)
  • [6] Gao L., Zheng S., Zhang Q., The Photocatalytic Materials and Applications of Nano Titanium Oxide, pp. 187-196, (2006)
  • [7] Yamashita H., Harada M., Misaka J., Ikeue Takeuchi M., Anpo K.M., Degradation of propanol diluted in water under visible light irradiation using metal ion-implanted titanium dioxide photocatalysts, Photochem. Photobiol. A, 148, pp. 257-261, (2002)
  • [8] Kudo A., Niishiro R., Iwase A., Kato H., Effects of doping of metal cations on morphology, activity, and visible light response of photocatalysts, Chem. Phys., 339, pp. 104-110, (2007)
  • [9] Miyauchi M., Takashio M., Tobimatsu H., Photocatalytic activity of SrTiO<sub>3</sub> codoped with nitrogen and lanthanum under visible light illumination, Langmuir, 20, pp. 232-236, (2004)
  • [10] Mrowetz M., Balcerski W., Colussi A.J., Hoffmann M.R., Oxidative power of nitrogen-doped TiO<sub>2</sub> photocatalysts under visible illumination, Phys. Chem. B, 108, pp. 17269-17273, (2004)
123