Enhanced photocatalytic activity of chromium(VI) reduction and EDTA oxidization by photoelectrocatalysis combining cationic exchange membrane processes

Hsu, Hung-Te; Chen, Shiao-Shing; Tang, Yifang; Hsi, Hsing‐Cheng

doi:10.1016/j.jhazmat.2012.12.058

Cited by 41 publications

(13 citation statements)

References 41 publications

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“…Radical scavenging experiments were conducted to identify the rate-limiting reactive species. Because ethylenediaminetetraacetic acid (EDTA), isopropanol (IPA) and p-benzoquinone (p-BQ) are effective scavengers with respective to h + at VBM, hydroxyl radical (OH) and superoxygen radical due to eat CBM, they were mixed into RhB solution respectively to acquire corresponding photodegradation activities for comparing and assessing the contributions of photogenerated e - [38] and h + [39] at band edges into photodegradation.…”

Section: Photocatalytic Degradation Of Rhb and Water Splittingmentioning

confidence: 99%

Experimental and DFT insights of the Zn-doping effects on the visible-light photocatalytic water splitting and dye decomposition over Zn-doped BiOBr photocatalysts

Guo

Liao

Lee

et al. 2019

Applied Catalysis B: Environmental

178

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Synergetic experimental and DFT insights of energy band structures and photogenerated reactive intermediates are indispensable to design impurity-doped photocatalysts for photocatalytic environment remediation and solar fuels. Herein, despite the larger bandgap (Eg), Zn-doped BiOBr samples exhibited superior activity to BiOBr in the photocatalytic water splitting but adverse in photodegradation of Rhodamine B under visible-light illumination. Based on the spectral and electrochemical impedance characterisations and DFT simulations, the broader bandgap of Zn-doped BiOBr was explicitly assigned to more positive valence band maximum (VBM) and more negative conduction band minimum (CBM). The enhanced photocatalytic water splitting on Zn-doped BiOBr was assigned to the higher redox chemical potentials of charge carriers on respective CBM and VBM, suppressed back reaction and reduced recombination of photogenerated charge carriers. However, the reduced e-h + recombination on Zn-doped BiOBr cannot cancel the adverse influences of its weaker light absorption and dye-sensitisation effects, leading to slower RhB photodegradation.

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Section: Photocatalytic Degradation Of Rhb and Water Splittingmentioning

confidence: 99%

Experimental and DFT insights of the Zn-doping effects on the visible-light photocatalytic water splitting and dye decomposition over Zn-doped BiOBr photocatalysts

Guo

Liao

Lee

et al. 2019

Applied Catalysis B: Environmental

178

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“…The World Health Organization (WHO) has stipulated that Cr(VI) concentration in drinking water should be below 0.05 ppm (Chen et al 2011 ). Precipitation (Gheju and Balcu 2011 ), adsorption (Sun et al 2014a , b ), ion exchange (Edebali and Pehlivan 2010 ) and membrane separation (Hsu et al 2013 ) as conventional techniques are commonly used to eliminate Cr(VI) from wastewater. Precipitation and adsorption processes are economic and effective, but only efficient when the Cr(VI) concentration is relatively high (Abyaneh and Fazaelipoor 2016 ; Hokkanen et al 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal derived nitrogen doped SrTiO3 for efficient visible light driven photocatalytic reduction of chromium(VI)

et al. 2016

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In this work, we report on the synthesis of nitrogen doped SrTiO3 nanoparticles with efficient visible light driven photocatalytic activity toward Cr(VI) by the solvothermal method. The samples are carefully characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–Vis diffuse reflectance spectroscopy and photocatalytic test. It is found that nitrogen doping in SrTiO3 lattice led to an apparent lattice expansion, particle size reduction as well as subsequent increase of Brunner–Emmet–Teller surface area. The visible light absorption edge and intensity can be modulated by nitrogen doping content, which absorption edge extends to about 600 nm. Moreover, nitrogen doping can not only modulate the visible light absorption feature, but also have consequence on the enhancement of charge separation efficiency, which can promote the photocatalytic activity. With well controlled particle size, Brunner–Emmet–Teller surface area, and electronic structure via nitrogen doping, the photocatalytic performance toward Cr(VI) reduction of nitrogen doped SrTiO3 was optimized at initial hexamethylenetetramine content of 2.Electronic supplementary materialThe online version of this article (doi:10.1186/s40064-016-2804-2) contains supplementary material, which is available to authorized users.

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“…Photocatalysis technique is considered to be one of the most effective methods to resolve aforementioned problems [7][8][9]. In recent years, the exploitation of novel photocatalyst with superior visible-light response is a very hot research area [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetically separable Fe3O4@PANI/TiO2 photocatalyst with fast charge migration for photodegradation of EDTA under visible-light irradiation

Tian

Zhao

et al. 2016

Chemical Engineering Journal

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Enhanced photocatalytic activity of chromium(VI) reduction and EDTA oxidization by photoelectrocatalysis combining cationic exchange membrane processes

Cited by 41 publications

References 41 publications

Experimental and DFT insights of the Zn-doping effects on the visible-light photocatalytic water splitting and dye decomposition over Zn-doped BiOBr photocatalysts

Experimental and DFT insights of the Zn-doping effects on the visible-light photocatalytic water splitting and dye decomposition over Zn-doped BiOBr photocatalysts

Hydrothermal derived nitrogen doped SrTiO3 for efficient visible light driven photocatalytic reduction of chromium(VI)

Synthesis of magnetically separable Fe3O4@PANI/TiO2 photocatalyst with fast charge migration for photodegradation of EDTA under visible-light irradiation

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