基于Er3+:YAlO3/TiO2的可见光催化降解室内甲醛

周娴; 董山山; 董双石; 刘耀辉; 万立东

doi:10.3788/fgxb20153607.0769

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基于Er³⁺:YAlO₃/TiO₂的可见光催化降解室内甲醛

材料合成及性能 | 更新时间：2020-08-12

- 基于Er³⁺:YAlO₃/TiO₂的可见光催化降解室内甲醛
- Photocatalytic Degradation of Indoor Formaldehyde by Er³⁺:YAlO₃/TiO₂ Photocatalyst Under Visible Light Irradiation
- 发光学报 2015年36卷第7期页码：769-774
- 作者机构：
  
  吉林大学地下水资源与环境教育部重点实验室,吉林长春,130021
- 作者简介：
- 基金信息：
  
  国家自然科学基金(50908096)();吉林省科技发展计划(20140101159JC)资助项目()
- DOI：10.3788/fgxb20153607.0769
  中图分类号： O654;O482.31
- 纸质出版日期：2015-7-3，
  
  收稿日期：2015-4-9，
  
  修回日期：2015-5-6，
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周娴, 董山山, 董双石等. 基于Er3+:YAlO3/TiO2的可见光催化降解室内甲醛[J]. 发光学报, 2015,36(7): 769-774

ZHOU Xian, DONG Shan-shan, DONG Shuang-shi etc. Photocatalytic Degradation of Indoor Formaldehyde by Er3+:YAlO3/TiO2 Photocatalyst Under Visible Light Irradiation[J]. Chinese Journal of Luminescence, 2015,36(7): 769-774
周娴, 董山山, 董双石等. 基于Er3+:YAlO3/TiO2的可见光催化降解室内甲醛[J]. 发光学报, 2015,36(7): 769-774 DOI： 10.3788/fgxb20153607.0769.

ZHOU Xian, DONG Shan-shan, DONG Shuang-shi etc. Photocatalytic Degradation of Indoor Formaldehyde by Er3+:YAlO3/TiO2 Photocatalyst Under Visible Light Irradiation[J]. Chinese Journal of Luminescence, 2015,36(7): 769-774 DOI： 10.3788/fgxb20153607.0769.

摘要

为使TiO

能够在可见光下发挥其于紫外激发的高光催化活性降解室内甲醛

采用水热处理法将TiO

与掺杂稀土离子Er

的上转换发光剂Er

:YAlO

结合

制备具有可见光响应的Er

:YAlO

/TiO

光催化剂

并对其进行了表征分析。结果表明

TiO

以锐钛矿为主

且Er

:YAlO

可有效地将可见光上转换至可激发TiO

的紫外光。在箱式反应器中进行光催化降解气态甲醛

研究了甲醛初始浓度与催化剂用量对甲醛降解效率的影响。结果表明

该光催化反应的假一级反应速率常数(

app

)与甲醛初始浓度成正相关

而随催化剂用量的增加先升高后降低。当甲醛初始浓度为0.058 mg/m

、催化剂用量为0.122 4 g/L时

app

最大为3.6510

-3

min

-1

。该反应符合Langmuir-Hinshelwood模型

反应速率常数为510

-8

mg/(Lmin)。

Abstract

In order to develop the photocatalytic activity of TiO

under visible light as that under ultraviolet light to degrade indoor ormaldehyde pollution

a visible light response photocatalyst consisting of TiO

and upconversion luminescence agent Er

:YAlO

was prepared using hydrothermal treatment method. The photocatalyst was characterized by X-ray diffractometer (XRD)

UV-Vis diffuse reflectance spectrophotometer (DRS) and fluorescence spectrometer (FS).The prepared TiO

is anatase-dominant. Er

:YAlO

can convert visible light to ultraviolet (UV) light to expand the absorption range of TiO

. The upconverted UV light can excite TiO

effectively to produce active materials with strong oxidation ability. The photocatalyst was applied to degrade gaseous formaldehyde in the sealed reactor

and the effect of initial formaldehyde concentration and photocatalyst dosage on the degradation efficiency of formaldehyde were investigated. The results show that the prepared photocatalyst can efficiently degrade the formaldehyde. The apparent first order reaction rate constant for gaseous formaldehyde degradation is positively correlated with the initial formaldehyde concentration

but increases first then decreases with the increasing of photocatalyst dosage from 0.061 2 g/L to 0.234 8 g/L. When the formaldehyde concentration is 0.058 mg/m

and the photocatalyst dosage is 0.122 4 g/L

the apparent first order reaction rate constant is the biggest of 3.6510

-3

min

-1

. The degradation follows Langmuir-Hinshelwood model

and the reaction rate constant is 510

-8

mg/(Lmin).

关键词

上转换发光剂TiO2可见光催化甲醛

Keywords

upconversion luminescence agentTiO2visible light driven photocatalyticformaldehyde

references

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