Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Improved performance of immobilized TiO2 under visible light for the commercial surfactant degradation: Role of carbon doped TiO2 and anatase/rutile ratio

Tue Oct 4 00:56:46 2022

(2020) Improved performance of immobilized TiO2 under visible light for the commercial surfactant degradation: Role of carbon doped TiO2 and anatase/rutile ratio. Catalysis Today. pp. 277-289. ISSN 0920-5861

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Abstract

Nanoparticles of TiO2 with different ratios of anatase (A)/rutile (R) phases were successfully synthesized via solgel method. Carbon-doped TiO2 (CDT) was supported on the surfaces of granular activated carbon (GAC) for photocatalytic degradation and mineralization of the commercial nonylphenol (NP) surfactant under visible light irradiation. The physicochemical characteristics of the synthesized composites (TiO2, CDT, and CDT/GAC) were determined in detail by X-ray diffraction, scanning electron microscopy, elemental mapping, Brunauer-Emmett-Teller, UV-Vis absorption and PL spectra. The results indicated that the band gap decreased from 3.17 eV to 2.72 eV after C doping, and to 2.66 eV by changing the calcination temperature from 475 degrees C to 600 degrees C; the visible light absorption also increased. This study demonstrates that the CDT/GAC photocatalyst with an A (53.06)/R (46.94) ratio exhibited high degradation efficiency. COD and TOC removal of 99 and 89, respectively, and 80 NP decrease within 60 min. The NP degradation increases with increasing temperature and light intensity. The Langmuir-Hinshelwood kinetic model fitted with the experimental data. In addition, it is reported that the synthesized photocatalyst became stable and highly active, even after five cycles. The results also showed that the values of the carbon oxidation state (COS) and the average oxidation state (AOS) were highly increased after the decomposition of NP by the Xenon/CDT (A/R)/GAC process over 3.37 and 3.87, respectively.

Item Type: Article
Creators:
CreatorsEmail
Noorimotlagh, Z.UNSPECIFIED
Kazeminezhad, I.UNSPECIFIED
Jaafarzadeh, N.UNSPECIFIED
Ahmadi, M.UNSPECIFIED
Ramezani, Z.UNSPECIFIED
Keywords: Nonylphenol TiO2 Light intensity Temperature Anatase/Rutile Biodegradability tio2-coated activated carbon heterogeneous photocatalytic degradation advanced oxidation aqueous-solutions bisphenol-a calcination temperature tio2/activated carbon rhodamine-b textile dye nonylphenol Chemistry Engineering
Divisions:
Page Range: pp. 277-289
Journal or Publication Title: Catalysis Today
Journal Index: ISI
Volume: 348
Identification Number: https://doi.org/10.1016/j.cattod.2019.08.051
ISSN: 0920-5861
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/2570

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