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

XIA Guangzhi; MAO Ping; LI Yan; YANG Yi

doi:10.11949/j.issn.0438-1157.20141606

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

更新时间：2025-12-10

- Photocatalytic properties of upconversion composite film Pr³⁺: Y₂SiO₅/TiO₂
- CIESC Journal Issue 4, Pages: 1607-1614(2015)
- 作者机构：
  
  1. 南京理工大学环境与生物工程学院,江苏,南京,210094
  2. 南京理工大学化工学院,江苏,南京,210094
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141606
  CLC： 788
- Online First：05 April 2015，
  
  Published：05 April 2015
- 稿件说明：
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XIA Guangzhi, MAO Ping, LI Yan, et al. Photocatalytic properties of upconversion composite film Pr³⁺: Y₂SiO₅/TiO₂[J]. CIESC Journal, 2015, (4): 1607-1614. DOI: 10.11949/j.issn.0438-1157.20141606.
DOI：

XIA Guangzhi, MAO Ping, LI Yan, et al. Photocatalytic properties of upconversion composite film Pr³⁺: Y₂SiO₅/TiO₂[J]. CIESC Journal, 2015, (4): 1607-1614. DOI: 10.11949/j.issn.0438-1157.20141606. DOI：

摘要

为解决悬浮相TiO2粉体处理水中污染物后难以分离和回收利用的缺点并进一步提高纳米TiO2对太阳光的利用率

采用溶胶-凝胶法制备了Pr3+:Y2SiO5粉体、TiO2薄膜以及Pr3+:Y2SiO5/TiO2复合膜。利用XRD、SEM等表征方法对样品进行表征。重点考察了Pr3+:Y2SiO5/TiO2复合材料薄膜对亚甲基蓝的光催化降解效率与镀膜层数等因素的关系。结果发现涂覆5层Pr3+:Y2SiO5/TiO2复合膜时

降解率可高达95.7%

其对应的第2次和第3次降解率分别为82.46%和74.94%;随着Pr3+:Y2SiO5/TiO2复合膜薄膜面积的增加降解率先增加后降低

使用8张薄膜时降解率最高达96.43%;增加光照强度有利于提高降解率

但当光照强度增加到100 W时

降解率达到稳定值96.18%;随着初始浓度的增加

降解率逐渐降低。

Abstract

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/TiO2composite 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.

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