A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater

A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater

A mild in situ method was developed to construct an iron doped rutile TiO<sub>2</sub> photocatalyst like cauliflower for degradation synthetic textile dye-methyl orange. The synthesized photocatalysts presented distinguished photocatalytic activity. At the optimal Fe concentration (0.5%)...

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Main Authors: Xiangcheng Shi, Yanbin Zhang, Xiaoyu Liu, Huihui Jin, Haiyang Lv, Shujiao He, Haigang Hao, Changyan Li
Format: Article
Language:English
Published: MDPI AG 2019-05-01
Series:Catalysts
Subjects:
photocatalysts
TiO<sub>2</sub>
wastewater
degradation
organic dye
Online Access:https://www.mdpi.com/2073-4344/9/5/426
id doaj-ace24606edb042b5b29e1570e99375bb
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spelling doaj-ace24606edb042b5b29e1570e99375bb2020-11-25T01:13:40ZengMDPI AGCatalysts2073-43442019-05-019542610.3390/catal9050426catal9050426A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in WastewaterXiangcheng Shi0Yanbin Zhang1Xiaoyu Liu2Huihui Jin3Haiyang Lv4Shujiao He5Haigang Hao6Changyan Li7College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaA mild in situ method was developed to construct an iron doped rutile TiO<sub>2</sub> photocatalyst like cauliflower for degradation synthetic textile dye-methyl orange. The synthesized photocatalysts presented distinguished photocatalytic activity. At the optimal Fe concentration (0.5%), the decomposition rate of methyl orange (MO) was about 90% under 40 min of ultraviolet (UV) light irradiation. Whereas, to our knowledge, only 70% of the decomposition rate of MO was achieved by commercial photocatalyst P25 under the similar reaction condition. Additionally, the rutile preparation temperature did not exceed 100 &#176;C, which was much lower than the traditional preparation calcination temperature (e.g., 600 &#176;C). The specific surface area of Fe doped catalysts was bigger than that of the control sample and the catalyst characterization indicated that the doped iron was incorporated into the rutile TiO<sub>2</sub> lattice and resulted in the lattice disorder. The lattice disorder would have generated surface defects in the crystal structure, which was in favor of the photocatalytic reaction. The UV-Vis diffuse refection characterization and Density Functional Theory (DFT) calculation suggested that doping a small amount of Fe into the lattice of rutile would lead to a narrower band gap and the formation of a doping energy level between conduction and valence bands of TiO<sub>2</sub>. This further increased the degradation efficiency of synthetic textile dyes in wastewaters. Our study has provided a relatively easy operation for synthesis Fe doped rutile TiO<sub>2</sub>, which is a benefit to decrease the cost in wastewater treatment process.https://www.mdpi.com/2073-4344/9/5/426photocatalystsTiO<sub>2</sub>wastewaterdegradationorganic dye
collection DOAJ
language English
format Article
sources DOAJ
author Xiangcheng Shi
Yanbin Zhang
Xiaoyu Liu
Huihui Jin
Haiyang Lv
Shujiao He
Haigang Hao
Changyan Li
spellingShingle Xiangcheng Shi
Yanbin Zhang
Xiaoyu Liu
Huihui Jin
Haiyang Lv
Shujiao He
Haigang Hao
Changyan Li
A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater
Catalysts
photocatalysts
TiO<sub>2</sub>
wastewater
degradation
organic dye
author_facet Xiangcheng Shi
Yanbin Zhang
Xiaoyu Liu
Huihui Jin
Haiyang Lv
Shujiao He
Haigang Hao
Changyan Li
author_sort Xiangcheng Shi
title A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater
title_short A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater
title_full A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater
title_fullStr A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater
title_full_unstemmed A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO<sub>2</sub> Photocatalysts for Degradation of Organic Dye in Wastewater
title_sort mild in-situ method to construct fe-doped cauliflower-like rutile tio<sub>2</sub> photocatalysts for degradation of organic dye in wastewater
publisher MDPI AG
series Catalysts
issn 2073-4344
publishDate 2019-05-01
description A mild in situ method was developed to construct an iron doped rutile TiO<sub>2</sub> photocatalyst like cauliflower for degradation synthetic textile dye-methyl orange. The synthesized photocatalysts presented distinguished photocatalytic activity. At the optimal Fe concentration (0.5%), the decomposition rate of methyl orange (MO) was about 90% under 40 min of ultraviolet (UV) light irradiation. Whereas, to our knowledge, only 70% of the decomposition rate of MO was achieved by commercial photocatalyst P25 under the similar reaction condition. Additionally, the rutile preparation temperature did not exceed 100 &#176;C, which was much lower than the traditional preparation calcination temperature (e.g., 600 &#176;C). The specific surface area of Fe doped catalysts was bigger than that of the control sample and the catalyst characterization indicated that the doped iron was incorporated into the rutile TiO<sub>2</sub> lattice and resulted in the lattice disorder. The lattice disorder would have generated surface defects in the crystal structure, which was in favor of the photocatalytic reaction. The UV-Vis diffuse refection characterization and Density Functional Theory (DFT) calculation suggested that doping a small amount of Fe into the lattice of rutile would lead to a narrower band gap and the formation of a doping energy level between conduction and valence bands of TiO<sub>2</sub>. This further increased the degradation efficiency of synthetic textile dyes in wastewaters. Our study has provided a relatively easy operation for synthesis Fe doped rutile TiO<sub>2</sub>, which is a benefit to decrease the cost in wastewater treatment process.
topic photocatalysts
TiO<sub>2</sub>
wastewater
degradation
organic dye
url https://www.mdpi.com/2073-4344/9/5/426
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