Preparation and Characterization of Magnetic Nanosized TiO2/Al2O3/Fe3O4 Photocatalyst

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Preparation and Characterization of Magnetic Nanosized TiO₂/Al₂O₃/Fe₃O₄ Photocatalyst

更新时间：2025-07-09

- Preparation and Characterization of Magnetic Nanosized TiO₂/Al₂O₃/Fe₃O₄ Photocatalyst
- Vol. 43, Issue 3, Pages: 78-81+100(2009)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC： O643
- Online First：10 March 2009，
  
  Published：2009
- 稿件说明：
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Preparation and Characterization of Magnetic Nanosized TiO₂/Al₂O₃/Fe₃O₄ Photocatalyst[J]. 2009, 43(3): 78-81+100.
DOI：

Preparation and Characterization of Magnetic Nanosized TiO₂/Al₂O₃/Fe₃O₄ Photocatalyst[J]. 2009, 43(3): 78-81+100. DOI：

摘要

以化学共沉淀法制备的纳米铁氧体Fe

为磁载体

采用溶胶-凝胶法制备了易于固液分离回收的新型磁性纳米TiO

/Al

/Fe

光催化剂

并讨论了制备条件对催化剂晶体形态及磁性能的影响.采用XRD、SEM、TEM、FT-IR及VSM等对催化剂进行了表征

以酸性大红3R为目标降解物

对催化剂的光催化性能进行了研究. 结果表明:磁性纳米TiO

/Al

/Fe

光催化剂呈现顺磁性

具有较强的光催化活性和较高的回收率.在n(TiO

):n(Al

):n(Fe

)为12:2:1、煅烧时间为2.5 h、煅烧温度为400～450 ℃的条件下

制备的催化剂在酸性大红3R溶液初始浓度为100 mg/L、光催化反应降解时间为120 min、光催化剂用量为1.0 g/L时

酸怀大红3R的降解率可达到99.8%

在3次循环使用后酸性大红3R降解率仍保持在85%以上. 在外加磁场的作用下

催化剂可与液相迅速分离

回收率高达83%.

Abstract

Nano magnetite matrix Fe

prepared by chemical coprecipitation was used as the magnetic core

and a novel magnetic nanosized TiO

/Al

/Fe

photocatalyst was prepared by sol-gel procedure. The effects of calcination conditions on crystal shape and magnetism of the catalyst were stud

ied. The composite particle was characterized with XRD

TEM

SEM

FT-IR and VSM. The photocatalytic activity of TiO

/Al

/Fe

was investigated by the degradation of acid scarlet 3R. The results indicate that TiO

/Al

/Fe

shows good super paramagnetism

higher photocatalytic activity and recyclability. The photodegradation rate of acid scarlet 3R can reach 99.8% and still 85% after three cycles under the conditions of catalyst preparation and reaction in our study. In addition

the catalyst can be separated from liquid rapidly by the external magnetic field and the recycle rate of the catalyst can be up to 83%.

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references

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