An easily sedimentable and effective TiO2 photocatalyst for removal of dyes in water

Jiang, Ping; Ren, Dazhong; He, Daiping; Fu, Wensheng; Wang, Jian; Gu, Mingxia

doi:10.1016/j.seppur.2013.10.048

Cited by 32 publications

(13 citation statements)

References 29 publications

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“…Currently, a number of techniques and processes including physical, chemical, and biological methods have been studied to treat the dyes from wastewater [6][7][8][9][10]. For instance, adsorption and photocatalysis have been considered as effective approaches for dye removal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of TiO₂/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Xing

Shi

Zhang

et al. 2016

Journal of Nanomaterials

118

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Photocatalysts comprising nanosized TiO2particles on activated carbon (AC) were prepared by a sol-gel method. The TiO2/AC composites were characterized by X-ray diffraction (XRD), thermogravimetric (TG) analysis, nitrogen adsorption, scanning electron microscope (SEM), transmission electron microscope (TEM), and energy dispersive X-ray (EDX). Their photocatalytic activities were studied through the degradation of Rhodamine B (RhB) in photocatalytic reactor at room temperature under ultraviolet (UV) light irradiation and the effect of loading cycles of TiO2on the structural properties and photocatalytic activity of TiO2/AC composites was also investigated. The results indicate that the anatase TiO2particles with a crystal size of 10–20 nm can be deposited homogeneously on the AC surface under calcination at 500°C. The loading cycle plays an important role in controlling the loading amount of TiO2and morphological structure and photocatalytic activity of TiO2/AC composites. The porosity parameters of these composite photocatalysts such as specific surface area and total pore volume decrease whereas the loading amount of TiO2increases. The TiO2/AC composite synthesized at 2 loading cycles exhibits a high photocatalytic activity in terms of the loading amount of TiO2and as high as 93.2% removal rate for RhB from the 400 mL solution at initial concentration of 2 × 10−5 mol/L under UV light irradiation.

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Section: Introductionmentioning

confidence: 99%

Preparation of TiO₂/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Xing

Shi

Zhang

et al. 2016

Journal of Nanomaterials

118

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“…One solution could be the multiple usage of the photocatalyst dispersion [8], even if the photo-catalytic activity decreases gradually [9,10], due to the presence of adsorbed contaminants on its surface [11], or to the nanoparticles’ agglomeration. Although many studies have been dedicated to the recovery or separation of TiO 2 used for the treatment of contaminated waters [12,13,14] or to the regeneration of TiO 2 immobilized on supports in the form of films [15], none of them were focused on the re-use of the TiO 2 -1% Fe-N dispersion resulting from the textiles’ treatment.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic, Antimicrobial and Biocompatibility Features of Cotton Knit Coated with Fe-N-Doped Titanium Dioxide Nanoparticles

et al. 2016

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Our research was focused on the evaluation of the photocatalytic and antimicrobial properties, as well as biocompatibility of cotton fabrics coated with fresh and reused dispersions of nanoscaled TiO2-1% Fe-N particles prepared by the hydrothermal method and post-annealed at 400 °C. The powders were characterized by X-ray diffraction (XRD), Mössbauer spectroscopy and X-ray photoelectron spectroscopy. The textiles coated with doped TiO2 were characterized by scanning electron microscopy and energy dispersive X-ray analyses, and their photocatalytic effect by trichromatic coordinates of the materials stained with methylene blue and coffee and exposed to UV, visible and solar light. The resulting doped TiO2 consists of a mixture of prevailing anatase phase and a small amount (~15%–20%) of brookite, containing Fe3+ and nitrogen. By reusing dispersions of TiO2-1% Fe-N, high amounts of photocatalysts were deposited on the fabrics, and the photocatalytic activity was improved, especially under visible light. The treated fabrics exhibited specific antimicrobial features, which were dependent on their composition, microbial strain and incubation time. The in vitro biocompatibility evaluation on CCD-1070Sk dermal fibroblasts confirmed the absence of cytotoxicity after short-term exposure. These results highlight the potential of TiO2-1% Fe-N nanoparticles for further use in the development of innovative self-cleaning and antimicrobial photocatalytic cotton textiles. However, further studies are required in order to assess the long-term skin exposure effects and the possible particle release due to wearing.

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“…Titanium dioxide, or titania (TiO2), an n-type transition metal oxide semiconductor, has been widely utilised as a photocatalyst to initiate the degradation of organic pollutants. It has been applied to photocatalytic oxidation of several industrial and pharmaceutical effluents, such as 4-methoxybenzyl alcohol [3], ciprofloxacin [4], reactive dyes [5,6], nitrobenzene [7,8] and benzylparaben [9]. When a higher photon energy than the band gap of TiO2 (anatase 3.20 eV and rutile 3.02 eV) is absorbed, electrons will be excited from the filled valence band (VB) to the empty conduction band (CB), leaving negative electrons in the CB and positive holes in the VB.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, TiO2 nanoparticles are widely investigated as a well-known, effective and stable photocatalyst. As a photocatalyst in a slurry system, TiO2 nanoparticles need to be reclaimed to minimise the negative environmental influence [5]. The release of TiO2 nanoparticles to the environment will have a long-term toxicity and ecological impact on the aquatic organisms [12], even though TiO2 is considered to be biocompatible and FDA approved as a colour additive for human use [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Rapid thermally processed hierarchical titania-based hollow fibres with tunable physicochemical and photocatalytic properties

Zhang

Elma

Xie

et al. 2018

Separation and Purification Technology

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An easily sedimentable and effective TiO2 photocatalyst for removal of dyes in water

Cited by 32 publications

References 29 publications

Preparation of TiO₂/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Preparation of TiO₂/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Photocatalytic, Antimicrobial and Biocompatibility Features of Cotton Knit Coated with Fe-N-Doped Titanium Dioxide Nanoparticles

Rapid thermally processed hierarchical titania-based hollow fibres with tunable physicochemical and photocatalytic properties

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An easily sedimentable and effective TiO2 photocatalyst for removal of dyes in water

Cited by 32 publications

References 29 publications

Preparation of TiO2/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Preparation of TiO2/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Photocatalytic, Antimicrobial and Biocompatibility Features of Cotton Knit Coated with Fe-N-Doped Titanium Dioxide Nanoparticles

Rapid thermally processed hierarchical titania-based hollow fibres with tunable physicochemical and photocatalytic properties

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Product

Resources

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Preparation of TiO₂/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation

Preparation of TiO₂/Activated Carbon Composites for Photocatalytic Degradation of RhB under UV Light Irradiation