Activated carbon supported TiO2-photocatalysis doped with Fe ions fo continuous treatment of dye wastewater in a dynamic reactor

Li, Youji; Chen, Jun; Liu, Jianben; Ma, Mingyuan; Chen, Wei; Li, Leiyong

doi:10.1016/s1001-0742(09)60252-7

Cited by 54 publications

(18 citation statements)

References 21 publications

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“…Figure B depicted an XPS spectrum of the main elements of Al, Si, Fe, Ti, and O. The peaks for Fe2p, Ti2p, and Al2p core level of CBO were at 710.37, 458.15, and 74.9 eV, respectively, in agreement with previous reports . The atom molar ratios of Si/Al, Fe/Al, and Ti/Al in CBO by XPS (XRF) were 0.722 (0.015), 0.056 (0.068), and 0.031 (0.011), respectively, indicating the surface enrichment of Si and Ti in CBO.…”

Section: Resultssupporting

confidence: 87%

p‐Nitrophenol Removal by Bauxite Ore Assisted Ozonation and its Catalytic Potential

Chen

et al. 2015

CLEAN Soil Air Water

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The catalytic ozonation process (COP) has attracted wide attention in the treatment of recalcitrant organic contaminants because of its high efficiency and easy operation. In this study, the bauxite ore (BO) was used as a heterogeneous catalyst to catalyze ozonation of p-nitrophenol in water. Calcined BO (CBO) assisted COP (CBO-COP) exhibited a higher degradation and mineralization performance for p-nitrophenol in comparison with raw BO assisted COP and single ozonation process (SOP). The CBO-COP was dominated by hydroxyl radical mediated oxidation on the CBO surface, following a pseudo-first order kinetics with a reaction rate constant of 0.1944 min À 1 at 298.15 K and an activation energy of 6.476 kJ mol À 1. The reaction rate constants increased by about 76% at 298.15 K and 45% at 308.15 K and activation energy decreased by approximately 70% in CBO-COP compared to those in SOP. p-Nitrophenol in CBO-COP was first transformed into 4-nitrocatechol, pyrocatechol, hydroquinone, phenol pbenzoquinone, and o-benzoquinone, and then into benzoquinone, maleic acid, fumaric acid, acetic anhydride, acetic acid, formic acid, or directly mineralized to carbon dioxide and water. The results demonstrated the catalytic potential of BO for ozonation of recalcitrant organic contaminants considering low cost and earth-abundant reserves.

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Section: Resultssupporting

confidence: 87%

p‐Nitrophenol Removal by Bauxite Ore Assisted Ozonation and its Catalytic Potential

Chen

et al. 2015

CLEAN Soil Air Water

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“…However, TiO2 has an important disadvantage because it is in powder form and, therefore, a post-treatment separation stage is needed for its use as photocatalytic material in wastewater decontamination by photocatalytic treatment [18,19]. This is the main reason why it is very useful to test the possibility of supporting the TiO2 active phase on several materials-e.g., activated carbon, silica, glass and polymers-in order for it to be used as photocatalysts in photocatalytic reactors for wastewater decontamination [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration

et al. 2015

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Water pollution from emerging contaminants (ECs) or emerging pollutants is an important environmental problem. Heterogeneous photocatalytic treatment, as advanced oxidation treatment of wastewater effluents, has been proposed to solve this problem. In this paper, a heterogeneous photocatalytic process was studied for emergent contaminants removal using paracetamol as a model contaminant molecule. TiO2 photocatalytic activity was evaluated using two photocatalytic reactor configurations: Photocatalyst solid suspension in wastewater in a stirred photoreactor and TiO2 supported on glass spheres (TGS) configuring a packed bed photoreactor. The surface morphology and texture of the TGS were monitored by scanning electron microscope (SEM). The influence of photocatalyst amount and wastewater pH were evaluated in the stirred photoreactor and the influence of wastewater flowrate was tested in the packed bed photoreactor, in order to obtain the optimal operation conditions. Moreover, results obtained were compared with those obtained from photolysis and adsorption studies, using the optimal operation conditions. Good photocatalytic activities have been observed and leads to the conclusion that the heterogeneous photocatalytic system in a packed bed is an effective method for removal of emerging pollutants. OPEN ACCESSCatalysts 2015, 5 78

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“…erefore, modification of catalyst is crucial to enhance its photocatalytic activity. To present, catalytic efficiency of TiO 2 was significantly improved by being doped with metals such as V, Cr, W, and Fe or with metal oxides like ZnO, CuO, and so on for expanding the absorption edge to the visible region [3][4][5][6]. Among these metals, TiO 2 doped with Fe is in progress because Fe can replace the positions of Ti 4+ in the crystalline, reducing the band gap energy, which is conducive to the activation in the visible light [3,4,7].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Rhodamine B Using C/Fe Co-Doped Titanium Dioxide Coated on Activated Carbon

Thuy

Thi

Tran

et al. 2019

Journal of Chemistry

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Carbon and iron co-doped titanium dioxide catalyst coated on activated carbon (Fe-C-TiO2/AC) was successfully synthesized using the sol-gel method, followed by hydrothermal treatment. Commercial activated carbon was treated by HNO3 prior to being coated by the as-synthesized catalyst. The composite was characterized by XPS, XRD, UV-Vis spectrophotometry, IR, TEM, HR-TEM, and BET. The performance of the supported catalysts was evaluated in the degradation of rhodamine B (RhB) in the solution under visible-light irradiation. The results showed that, with the appropriate amount of activated carbon, prepared Fe-C-TiO2/AC catalysts exhibited higher catalytic activities and Fe-C-TiO2/AC system showed the best performance. The photocatalytic degradation efficiency of Fe-C-TiO2/AC was enhanced due to the synergistic effect between AC (adsorption effect) and Fe-C-TiO2 (photocatalysis effect). This facilitated the photocatalytic degradation of RhB by Fe-C-TiO2.

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Activated carbon supported TiO2-photocatalysis doped with Fe ions fo continuous treatment of dye wastewater in a dynamic reactor

Cited by 54 publications

References 21 publications

p‐Nitrophenol Removal by Bauxite Ore Assisted Ozonation and its Catalytic Potential

p‐Nitrophenol Removal by Bauxite Ore Assisted Ozonation and its Catalytic Potential

Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration

Enhanced Photocatalytic Degradation of Rhodamine B Using C/Fe Co-Doped Titanium Dioxide Coated on Activated Carbon

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