Photocatalytic degradation of 4-nitroaniline using solar and artificial UV radiation

Gautam, Satyen; Kamble, Sanjay P.; Sawant, S.B.; Pangarkar, Vishwas G.

doi:10.1016/j.cej.2005.03.021

Cited by 80 publications

(32 citation statements)

References 20 publications

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“…Many disposal processes including biodegradation, chemical oxidation, and adsorption are developed [2][3][4][5][6], and among which adsorption is shown to be effective [7][8][9]. In comparison with the classical adsorbents such as activated carbons and silica gels, macroporous polymeric adsorbents are more attractive alternatives due to their favorable structural diversity and feasible regeneration [10,11].…”

Section: Introductionmentioning

confidence: 99%

Surface modification on a hyper-cross-linked polymeric adsorbent by multiple phenolic hydroxyl groups to be used as a specific adsorbent for adsorptive removal of p-nitroaniline from aqueous solution

Huang

2010

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Surface modification on a hyper-cross-linked polymeric adsorbent by multiple phenolic hydroxyl groups to be used as a specific adsorbent for adsorptive removal of p-nitroaniline from aqueous solution

Huang

2010

Journal of Colloid and Interface Science

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“…Similar results have been presented for the photocatalytic oxidation of other organic compounds. [15][16][17] According to Ishiki et al 18 this decrease may be due to the fixed active site number at the TiO 2 /H 2 O interface. Therefore, at low styrene concentrations, a larger number of water molecules will be adsorbed onto the available TiO 2 particles, producing hydroxyl radicals and leading to a rapid oxidation process.…”

Section: Effect Of Initial Styrene Concentrationmentioning

confidence: 99%

Styrene photocatalytic degradation reaction kinetics

Taffarel

Lansarin

Moro

et al. 2011

J. Braz. Chem. Soc.

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A reação de degradação fotocatalítica do estireno foi estudada utilizando-se TiO 2 P-25 (Degussa) como catalisador. Os experimentos foram realizados em um reator "slurry" em bateladas, com controle de temperatura, empregando-se uma lâmpada UV. Foram estudados os efeitos do pH, da concentração inicial de estireno, da concentração do catalisador e da adição de H 2 O 2 sobre a velocidade da reação. Os resultados mostraram que, em 90 min, cerca de 95% da quantidade inicial da molécula foi consumida por fotocatálise. Verificou-se também que a reação segue uma cinética de primeira ordem para concentrações iniciais de estireno, entre 15,27 e 57,25 ppm, a 30 °C. A análise cromatográfica das amostras coletadas durante os experimentos de fotodegradação identificou o benzaldeído como um dos intermediários dessa reação. Além disso, a adição de H 2 O 2 aumentou a velocidade de degradação.The aqueous styrene photocatalytic degradation reaction was evaluated using TiO 2 P-25 (Degussa) as a catalyst. These experiments were accomplished in a batch slurry reactor with temperature control and a UV lamp. The effects of the initial styrene concentration, the catalyst concentration, the hydrogen peroxide addition and the initial pH of the solution on the reaction were evaluated. The experimental results showed that in 90 min, 95% of the initial styrene was degraded by photocatalysis. It was verified that the styrene degradation rate fits a pseudo-first-order kinetics for initial styrene concentrations between 15.27 and 57.25 ppm, at 30 °C. The chromatographic analysis of the samples collected during the photocatalytic degradation revealed benzaldehyde as one of the intermediates. The addition of H 2 O 2 accelerated the degradation reaction until the system reached a certain optimum peroxide concentration in the reactor. Further H 2 O 2 additions resulted in a reaction rate reduction.

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“…The chemical is dangerous to aquatic organisms and may cause long-term damage to the environment. 6 1,4-diaminobenzene is known as an important component in the industrial chemicals, such as rubber antioxidants, precursor to aramid textile fibers, thermoplastics and elastomers. 9-11 Preparation of 1,4-diaminobenzene is obtained by the catalytic hydrogenation of 4-nitroaniline.…”

Section: 25mentioning

confidence: 99%

“…Kinetic study on the reductive reaction of 4-nitroaniline catalyzed by nanosized gold particles Figure 4 shows the kinetic profile of the reduction of 4-nitroaniline. 6 Kinetic analysis indicated that the reduction of 4-nitroaniline can be approximated as pseudo-first-order kinetics, according to the Langmuir-Hinshelwood (L-H) equation, which also takes into account the adsorption properties of the catalyst surface for the substrate:…”

mentioning

confidence: 99%

Preparation of Nanosized Gold Particles by Microwave Irradiation and Kinetics Study for Reduction of 4-Nitroaniline under Various Conditions

Kim¹,

Ko²

2015

Elastomers and Composites

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Nanosized gold particles were synthesized by microwave irradiation in a mixture composed of potassium tetrachloroaurate(III) n-hydrate, sodium citrate dihydrate and Tween 20. The synthesized gold particles were characterized by UV-vis spectrophotometer, scanning electron microscopy, and X-ray diffraction techniques. Using UV-vis spectroscopy, it was confirmed that gold nanoparticles act as a catalyst in the reduction of 4-nitroaniline with sodium borohydride to form 1,4-diaminobenzene. Additionally, we studied the kinetics of this reductive reaction in the presence of these gold nanoparticles under various conditions.

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Photocatalytic degradation of 4-nitroaniline using solar and artificial UV radiation

Cited by 80 publications

References 20 publications

Surface modification on a hyper-cross-linked polymeric adsorbent by multiple phenolic hydroxyl groups to be used as a specific adsorbent for adsorptive removal of p-nitroaniline from aqueous solution

Surface modification on a hyper-cross-linked polymeric adsorbent by multiple phenolic hydroxyl groups to be used as a specific adsorbent for adsorptive removal of p-nitroaniline from aqueous solution

Styrene photocatalytic degradation reaction kinetics

Preparation of Nanosized Gold Particles by Microwave Irradiation and Kinetics Study for Reduction of 4-Nitroaniline under Various Conditions

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