Cited by 23TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesAdvanced oxidation water treatment

A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO2 Photocatalysts for Degradation of Organic Dye in Wastewater

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Shi, Xiangcheng, Zhang, Yanbin, Liu, Xiaoyu, Jin, Huihui, Lv, Haiyang, He, Shujiao, Hao, Haigang, Li, Changyan·2019·Catalysts

Abstract

A mild in situ method was developed to construct an iron doped rutile TiO2 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 °C, which was much lower than the traditional preparation calcination temperature (e.g., 600 °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 TiO2 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 TiO2. 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 TiO2, which is a benefit to decrease the cost in wastewater treatment process.

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  • A low-cost and easy procedure has been established to synthesize an iron-doped titania, a cauliflower-like photocatalyst for degradation of azodyes in water.

    “a low-cost and easy procedure was established to synthesize an iron-doped titania, a cauliflower-like photocatalyst for the degradation of azodyes in water.”

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  1. Jafari, A.J.; Kakavandi, B.; Kalantary, R.R.; Gharibi, H.; Asadi, A.; Azari, A.; Babaei, A.A.; Takdastan, A. Korean Application of mesoporous magnetic carbon composite for reactive dyes removal: Process optimization using response surface methodology. J. Chem. Eng. 2016, 33, 2878-2890.

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Authors
Shi, X., Zhang, Y., Liu, X., Jin, H., Lv, H., He, S., Hao, H., & Li, C.
Affiliations
  • Hong Kong University of Science and Technology (HK)
  • Inner Mongolia University (CN)
Corresponding author
  • Hao, Haigang
  • Li, Changyan
Venue
Catalysts
Publisher
MDPI AG
Published
2019-05-08
Volume
9
Issue
5
Pages
426
ISSN
2073-4344 (ISSN-L)
OpenAlex
W2946720114
Cited by
23
References
76
Citations by year
2025: 1 · 2024: 4 · 2023: 3 · 2022: 1 · 2021: 6 · 2020: 5 · 2019: 3
FWCI
0.80
Type
journal article
Language
en
Open access
Locations
  • Catalysts (publishedVersion, cc-by)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Program of Higher-level Talents of IMU (21300-5185109)
  • Inner Mongolia Education Department Key Project (NJZZ16015)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
Keywords
photocatalysts, methyl orange degradation, dyeing wastewater, cauliflower-like morphology, in situ synthesis, lattice disorder, surface defects, band gap narrowing, UV photocatalysis, low-temperature synthesis

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