Chromate enhanced visible light driven TiO2 photocatalytic mechanism on Acid Orange 7 photodegradation

Wang, Yeoung-Sheng; Shen, Jyun-Hong; Horng, Jao‐Jia

doi:10.1016/j.jhazmat.2014.04.042

Cited by 24 publications

(7 citation statements)

References 39 publications

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“…Heterogeneous photocatalysis is considered an emerging destructive technology that leads to the total mineralization of diverse organic contaminants [9][10][11], in which the degradation of the contaminating compound dissolved in water occurs by the action of semiconductor materials irradiated by light, mainly ultraviolet. Some of the most used photocatalyst metallic semiconductor materials are TiO2, ZnO, SnO2, ZrO2, V2O5, WO3, CeO2, and g-C3N4, as well as several mixtures of these have been studied [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Photoelectrocatalytic Degradation of Congo Red Dye with Activated Hydrotalcites and Copper Anode

et al. 2021

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Photoelectrocatalysis is a novel technique that combines heterogeneous photocatalysis with the application of an electric field to the system through electrodes for the degradation of organic contaminants in aqueous systems, mainly of toxic dyes. The efficiency of these combined processes depends on the semiconductor properties of the catalysts, as well as on the anodic capacity of the electrode. In this study, we propose the use of active hydrotalcites in the degradation of Congo red dye through processes assisted by ultraviolet (UV) irradiation and electric current. Our research focused on evaluating the degradation capacity of Congo red by means of photolysis, catalysis, photocatalysis, electrocatalysis, and photoelectrocatalysis, as well as identifying the effect of the properties of the active hydrotalcites in these processes. The results show that a maximum degradation was reached with the photoelectrocatalysis process with active hydrotalcites and a copper anode at 6 h with 95% in a half-life of 0.36 h. The degradation is favored by the attack of the OH• radicals under double bonds in the diazo groups where the electrode produces Cu2+ ions, and with the photogenerated electrons, the recombination speed of the electron–hole in the hydrotalcite catalyst is reduced until the complete degradation.

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Section: Introductionmentioning

confidence: 99%

Photoelectrocatalytic Degradation of Congo Red Dye with Activated Hydrotalcites and Copper Anode

et al. 2021

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“…Therefore, its utilization efficiency for sunlight is very low. To address this issue, TiO 2 was modified by different strategies such as doping with metal ion/nonmetal ions, codoping with two or more foreign ions, surface sensitization by organic dyes or metal complexes, surface fluorination, noble metal deposition, graphene modification, and black hydrogenation [10][11][12][13]. In addition, conductive polymers such as polyaniline and polypyrrole (PPy) were also used as stable photosensitizers to modify TiO 2 since they were efficient electron donors and good hole transporters under visible light excitation [14].…”

Section: Introductionmentioning

confidence: 99%

Rapid degradation of Congo red by molecularly imprinted polypyrrole-coated magnetic TiO2 nanoparticles in dark at ambient conditions

Wei

Liu

et al. 2015

Journal of Hazardous Materials

103

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“…TiO 2 as semiconductor photocatalyst has been widely applied in many fields due to its nontoxicity, high photocatalytic activity, and stability [5][6][7]. Photocatalytic property of TiO 2 can be attributed to the holes produced in the valance band under light irradiation, the valence band (h vb + ) potential is positive enough to generate the hydroxyl radicals, and the resulting hydroxyl radicals are a very strong oxidizing agent which can oxidize the organic pollutants into H 2 O, CO 2 , and other small molecules [8,9]. In addition, the other metal oxides (e.g., Al 2 O 3 , Fe 2 O 3 , and SiO 2 ) in red mud are good for the enhancement of photocatalytic activity of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization, and Photocatalytic Properties of Modified Red Mud

Wang

Yang

et al. 2015

Advances in Materials Science and Engineering

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Solid waste red mud was modified by HCl leaching. The structure property and composition of modified red mud were investigated by X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM), and Brunauer-EmmettTeller (BET). Under UV irradiation, methyl orange (MO) aqueous solution was photodegraded by modified red mud. The obtained results showed that the specific surface area of modified red mud was 317.14 m 2 /g, which was about 40 times higher than that of the normal red mud. After UV irradiation for 50 min, the removal percentage of MO reached 94.2%. The study provided a novel way for the application of red mud to the photocatalytic degradation of organic wastes.

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Chromate enhanced visible light driven TiO2 photocatalytic mechanism on Acid Orange 7 photodegradation

Cited by 24 publications

References 39 publications

Photoelectrocatalytic Degradation of Congo Red Dye with Activated Hydrotalcites and Copper Anode

Photoelectrocatalytic Degradation of Congo Red Dye with Activated Hydrotalcites and Copper Anode

Rapid degradation of Congo red by molecularly imprinted polypyrrole-coated magnetic TiO2 nanoparticles in dark at ambient conditions

Preparation, Characterization, and Photocatalytic Properties of Modified Red Mud

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