Photocatalytic degradation of Acid Red dye stuff in the presence of activated carbon-TiO2 composite and its kinetic enumeration

Singh, Pardeep; Vishnu, M.C.; Sharma, Karan Kumar; Borthakur, Anwesha; Srivastava, Pratap; Pal, Dan Bahadur; Tiwary, Dhanesh; Mishra, Pradeep Kumar

doi:10.1016/j.jwpe.2016.04.007

Cited by 62 publications

(12 citation statements)

References 59 publications

(61 reference statements)

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“…As one of the most significant traditional construction materials (steel and cement), the cement is facing enormous concerns due to its activity has been considered as one of the primary causes of air pollution [1]. To mitigate the environment impact of cement production, varieties of physical, chemical and biological methods such as adsorption, precipitation, and bioremediation have been proposed by scientists [2]. Among the above methods, the photocatalysis technology has been considered as one of the most efficient solutions to address air pollutants owing to its superior photocatalytic activity, low cost, and complete degradation [3].…”

Section: Introductionmentioning

confidence: 99%

“…XRD pattern of nano-TiO 2 conduction band (CB), and the corresponding holes (h + ) are generated in the valence band (VB), thus developing an "electron-hole" pair, as shown in equation(2). On the one hand, under the irradiation condition, electrons (e − ) in the conduction band (CB) can further react with the absorbed oxygen (O 2 ) and produce the superoxide ions(O •−2 ), as plotted in equation(3).…”

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confidence: 99%

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Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO₂ concrete

Guo

Huang

Chen

2020

Nanotechnology Reviews

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AbstractThe photocatalytic mixed crystal nano-TiO2 particles were incorporated with concrete by means of the internal doping method (IDM) and spraying method (SPM) in this paper. To evaluate the photocatalytic degradation efficiency of mixed crystal nano-TiO2 concrete, the methyl orange (MO) was chosen to simulate pollutants. The physicochemical characteristics and photocatalytic performance of mixed crystal nano-TiO2 concrete prepared by above two different methods were experimentally investigated under UV irradiation and solar irradiation. Furthermore, the effects of two key influential factors including pollutant concentration and irradiation condition were also analyzed and discussed. Experimental results indicate that the nano-TiO2 concrete prepared by the spraying method (SPM) exhibits maximum photocatalytic degradation efficiency of 73.82% when the sprayed nano-TiO2 slurry concentration is 10mg/L. The photocatalytic degradation efficiency of unpolished nano-TiO2 concrete is much higher than that of polished nano-TiO2 concrete under the same exposure time of UV irradiation. Moreover, the photocatalytic degradation efficiency of nano-TiO2 concrete decreases with the increase of pollutant concentration. The irradiation condition has an obvious influence on the photocatalytic degradation efficiency of nano-TiO2 concrete. In the aspect of applications, the practical recommendations for the nano-TiO2 concrete with self-cleaning capacity were presented according to the experimental results.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO₂ concrete

Guo

Huang

Chen

2020

Nanotechnology Reviews

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“…The nonmetal (especially N, S) doping can efficiently narrow the band gap of TiO2 films and enhance absorption of visible light [6][7][8][9] . Therefore, N and S doping is recognized as one of the most promising research.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a sunlight-driven TiO₂ film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner

Li¹,

Liu²,

Zhang³

et al. 2019

Preprint

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A hybrid structure of (NOx)i/S6+-TiO2 (x=0,1) film with high visible-light activity was prepared via facile one-step anodizing in (NH4)2S2O8 electrolyte. The film was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and ultraviolet-visible-infrared absorption spectroscopy, respectively. Transient photocurrent response and linear sweep voltammetry were also detected. The results showed that the (NOx)i/S6+-TiO2 film was composed of “flower-like” and porous structure. And N and S were successfully doped in the film. Meanwhile, the film also displayed broad and strong optical absorption at around 544 nm and 1500 nm. The photocurrent density reached 0.71 mA/cm2. The decoloration rate was close to 100% and TOC removal reached 59.44% in 20 min under sunlight in photoelectrocatalytic (PEC) degradation methyl orange. The film also exhibited good stability after reuse ten times. A possible mechanism of PEC was suggested in methyl orange degradation by using (NOx)i/S6+-TiO2 film.

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“…Currently, research on the photocatalytic degradation of organic pollutants are commonly based on a monocomponent solution focusing on optimizing its effectiveness, including catalyst loadings, calcination temperature, morphology, solution pH, initial concentration, etc. [14][15][16][17][18]. However, the practical dye wastewater usually contains multiple dyes with different structures and physiochemical properties [19,20].…”

Section: Introductionmentioning

confidence: 99%

Simulated Study on the Degradation of Monoand Bi-Component Dye Wastewater by TiO2/H3PW12O40 Film Excited under Solar-Like Radiation

Lü¹,

Yq²,

Luo³

et al. 2019

Pol. J. Environ. Stud.

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The objective of this work was to develop an effective technique for removing multiple component dye wastewater. Saturation Keggin-type phosphotungstic acid (H 3 PW 12 O 40) was introduced to prepare TiO 2 /H 3 PW 12 O 40 film for photocatalytic degradation of four monocomponent dye wastewater as rhodamine B (RhB), methyl orange (MO), malachite green (MG), and alizarin red (ARS), as well as bicomponent dye wastewater of RhB-MG with different volume ratio. The results indicated that the photocatalytic efficiency of TiO 2 /H 3 PW 12 O 40 film toward cation dyes (98.5% RhB and 95.2% MG) was higher than that of anion dyes (89.8% ARS and 48.8% MO) after 240 min solar-like irradiation, during which the adsorption acted as the controlling process, whereas in the bicomponent dye solution of RhB-MG, the degradation RhB was restrained due to the competition for the active sites of catalyst surface with MG. This work could provide necessary information for the treatment of multiple component dye wastewater in practical applications.

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Photocatalytic degradation of Acid Red dye stuff in the presence of activated carbon-TiO2 composite and its kinetic enumeration

Cited by 62 publications

References 59 publications

Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO₂ concrete

Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO₂ concrete

Preparation of a sunlight-driven TiO₂ film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner

Simulated Study on the Degradation of Monoand Bi-Component Dye Wastewater by TiO2/H3PW12O40 Film Excited under Solar-Like Radiation

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Photocatalytic degradation of Acid Red dye stuff in the presence of activated carbon-TiO2 composite and its kinetic enumeration

Cited by 62 publications

References 59 publications

Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO2 concrete

Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO2 concrete

Preparation of a sunlight-driven TiO2 film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner

Simulated Study on the Degradation of Monoand Bi-Component Dye Wastewater by TiO2/H3PW12O40 Film Excited under Solar-Like Radiation

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Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO₂ concrete

Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO₂ concrete

Preparation of a sunlight-driven TiO₂ film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner