Photocatalytic reduction of Cr(Ⅵ) by magnetic nanomaterial Fe3O4@TiO2 under visible light

WANG Zishuai; WANG Yaoqiang; XIAO Gang; SU Haijia

doi:10.11949/0438-1157.20190773

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Photocatalytic reduction of Cr(Ⅵ) by magnetic nanomaterial Fe₃O₄@TiO₂ under visible light

Material science and engineering\, nanotechnology | 更新时间：2026-07-24

- Photocatalytic reduction of Cr(Ⅵ) by magnetic nanomaterial Fe₃O₄@TiO₂ under visible light
- CIESC Journal Vol. 70, Issue 10, Pages: 4062-4071(2019)
- 作者机构：
  
  北京化工大学，北京市生物加工过程重点实验室，北京 100029
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190773
  CLC： X 52
- Received：08 July 2019，
  
  Revised：2019-09-16，
  
  Online First：24 July 2026，
  
  Published：05 October 2019
- 稿件说明：
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王子帅, 王耀强, 肖刚, 苏海佳. 磁性纳米Fe₃O₄@TiO₂可见光下光催化还原Cr(Ⅵ)[J]. 化工学报, 2019, 70(10): 4062-4071 DOI: 10.11949/0438-1157.20190773.

WANG Zishuai, WANG Yaoqiang, XIAO Gang, SU Haijia. Photocatalytic reduction of Cr(Ⅵ) by magnetic nanomaterial Fe₃O₄@TiO₂ under visible light[J]. CIESC Journal, 2019, 70(10): 4062-4071 DOI: 10.11949/0438-1157.20190773.
王子帅, 王耀强, 肖刚, 苏海佳. 磁性纳米Fe₃O₄@TiO₂可见光下光催化还原Cr(Ⅵ)[J]. 化工学报, 2019, 70(10): 4062-4071 DOI: 10.11949/0438-1157.20190773. DOI：

WANG Zishuai, WANG Yaoqiang, XIAO Gang, SU Haijia. Photocatalytic reduction of Cr(Ⅵ) by magnetic nanomaterial Fe₃O₄@TiO₂ under visible light[J]. CIESC Journal, 2019, 70(10): 4062-4071 DOI: 10.11949/0438-1157.20190773. DOI：

摘要

通过溶胶-凝胶法、水热法和煅烧法，成功制备出具有光催化活性的Fe

@TiO

磁性纳米复合材料，将超顺磁性的Fe

与TiO

复合，实现材料的快速回收与可见光响应能力的结合。进一步将Fe

@TiO

磁性纳米复合材料应用于Cr(Ⅵ)的去除，实验结果表明，在可见光照射下Fe

@TiO

对Cr(Ⅵ)的去除能力是P25的1.96倍。并深入探究了Fe

@TiO

中TiO

含量、Cr(Ⅵ)溶液的pH以及空穴去除剂对Fe

@TiO

可见光下光催化还原Cr(Ⅵ)能力的影响，实验表明当Fe

@TiO

中TiO

含量为1.0 g/g，添加甲酸作为空穴去除剂并且溶液pH=2时Fe

@TiO

对Cr(Ⅵ)的去除能力最佳，此条件下Cr(Ⅵ)的去除率达到99.85%，重复使用4次，催化能力依然保持较高水平。此外，Fe

@TiO

对5~500 mg/L浓度范围内的Cr(Ⅵ)都具有良好的去除能力。Fe

@TiO

磁性纳米复合材料对Cr(Ⅵ)具备优异的去除能力，具有良好的应用前景。

Abstract

@TiO

magnetic nanocomposites with photocatalytic activity were successfully prepared by sol-gel

hydrothermal methods and calcination method. Combine superparamagnetism Fe

and TiO

which can not only realize the rapid recovery of materials but also made the materials have visible light response capability. The Fe

@TiO

magnetic nanocomposites were further applied to the removal of Cr(Ⅵ). The results show that when Fe

@TiO

has a TiO

content of 1.0 g/g and the addition of formic acid as a hole remover and the solution pH=2

@TiO

has the best removal ability of Cr(Ⅵ). Under this condition

Cr(Ⅵ) removal rate reached 99.85%

and the catalytic performance remained high even used 4 times. In addition

@TiO

has good removal ability for Cr(Ⅵ) in the range of 5—500 mg/L. Fe

@TiO

has excellent removal ability for Cr(Ⅵ) magnetic nanocomposites and has a good application prospect.

关键词

Keywords

references

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