A simple route for photocatalytic degradation of phenol in aqueous zinc oxide suspension using solar energy

Pardeshi, Satish K.; Patil, Ashokrao B.

doi:10.1016/j.solener.2008.02.007

Cited by 243 publications

(126 citation statements)

References 15 publications

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“…However, a reduction in photodegradation was observed when the photocatalyst dosage went beyond the optimum concentration (0.4 g L -1 for 2,4-D and 2,4,5-T and 0.5 g L -1 for PAA and 4CA). This may be due to the opacity of the solution, reducing UV light penetration, which consequently reduces degradation of the pollutant (Pardeshi & Patil, 2008). Furthermore, the low percentage of degradation may due to the agglomeration of ZnO/γ-Fe 2 O 3 which causes a reduction in catalyst surface area available for light and pollutant adsorption and suppresses the generation of hydroxyl radicals (Daneshvar et al, 2004).…”

Section: Effect Of Photocatalyst Loadingmentioning

confidence: 99%

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Abdullah¹,

Mun²,

Zainal³

et al. 2013

IJC

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ZnO/γ-Fe 2 O 3 nanocomposite was synthesized via simple precipitation. The synthesized nanocatalysts underwent heat treatment at 450 o C for an hour. The characteristics of the nanocomposite were investigated by XRD, TEM, and BET surface area measurement. Zeta potential analysis was used to examine the surface charge properties of the nanocatalysts. The synthesized nanocomposite has an average particle size of 11 nm and a surface area of 20 m 2 g -1 . The potential of ZnO/γ-Fe 2 O 3 as a photocatalyst was evaluated by photodegrading chlorophenoxyacetic acids (PAA, 2,4-D, 2,4,5-T and 4CA). The decomposition of chlorophenoxyacetic acids by ZnO/γ-Fe 2 O 3 followed 4CA > 2,4,5-T ≈ 2,4-D > PAA. The result indicates the applicability of ZnO/γ-Fe 2 O 3 nanocomposite as a photocatalyst in removing organic pollutants in wastewater.

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Section: Effect Of Photocatalyst Loadingmentioning

confidence: 99%

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Abdullah¹,

Mun²,

Zainal³

et al. 2013

IJC

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“…Water solubility of m-cresol is above 24 g/l at 25 ℃ (Cooper, 1912). Therefore, m-cresol can be a significant threat to surface water, groundwater sources, or generally the environment (Kavitha, et al, 2005;Pardeshi, et al, 2008).The effective removal of m-cresol is currently both an environmental and economic problem (Flox, et al, 2007;Guyer, 1998). Photocatalysis is the field of current interest given its application in disinfecting drinking water and wastewater (Hoffmann, et al, 1995;Marcì, et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of m-cresol by Zinc Oxide under Visible-light Irradiation

Abdollahi¹,

Abdullah²,

Zainal³

et al. 2011

IJC

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The photodegradation of m-cresol was carried out under visible light (46% sunlight) by ZnO as photocatalyst. To measure the efficiency of photodegradation, the different variables studied included amount of photocatalyst, concentration of m-cresol and pH. The maximum amount of photocatalyst and concentration of m-cresol was 1.5 g/L and 25 ppm respectively. The photodegradation was favorable in the pH 6-9 range. The detected intermediates were 2-methyl-1,4-benzodiol, 2-methyl-para-benzoquinone, 3,5-dihydroxytoluene and 2,5-dihydroxy-benzaldehyde. TOC studies show that 78% of total organic carbon is removed from solution during irradiation time. This study indicates the great potential of ZnO to remove aqueous m-cresol under visible-light irradiation which is part of sunlight.

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“…During the photolysis of phenol under UV-C irradiation the appearance of light brown color and increase of the optical density of analyzed solution are observed, which can be explained by the formation of colored intermediates: benzoquinone, hydroquinone, and catechol [6]. Incomplete oxidation of phenol confirmed its low mineralization (22%, Figure 4), and indicates necessity of catalytic method usage.…”

Section: Photodegradation Of Phenolmentioning

confidence: 95%

“…The use of nanosized SO presents a great interest due to their outstanding optical, magnetic, catalytic, and sensing properties [4,5]. The phenolic compounds contained in the wastewater of chemical, petrochemical, and pharmaceutical industries are hazardous carcinogenic and mutagenic pollutants [6,7]. Furthermore, the oxidation of these substances in water bodies leads to decrease in dissolved oxygen required for normal functioning of animals and plants.…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesized Semiconductor Oxides in Photocatalytic Degradation of Phenol

Cherepivska

Prihod’ko

2014

ISRN Physical Chemistry

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Effectiveness of photocatalytic degradation of phenol in aqueous solution using semiconductor oxides (SO) prepared by a sol-gel method was examined. The physical and chemical properties of synthesized catalysts were investigated by X-ray diffraction (XRD), diffuse reflectance UV-Vis spectroscopy (DRS), and N 2 -adsorption measurements. The optimal conditions of the photocatalytic degradation of phenol using prepared titanium dioxide sample were defined.

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A simple route for photocatalytic degradation of phenol in aqueous zinc oxide suspension using solar energy

Cited by 243 publications

References 15 publications

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Photodegradation of m-cresol by Zinc Oxide under Visible-light Irradiation

Sol-Gel Synthesized Semiconductor Oxides in Photocatalytic Degradation of Phenol

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