Electrochemical reduction of nitrobenzene at carbon nanotube electrode

Li, Yuping; Cao, Hongbin; Liu, Chen-Ming; Zhang, Yi

doi:10.1016/j.jhazmat.2007.02.021

Cited by 192 publications

(104 citation statements)

References 18 publications

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“…Nitrobenzene and 4-nitrophenol are pollutants often present in wastewater originated from industrial plants for production of paper, pharmaceuticals, dyes, and others [1,2].…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of catalytic reduction of 4-nitrophenol with NaBH4 by means of Au nanoparticles dispersed in a conducting polymer matrix

Fedorczyk

Ratajczak

Kuzmych

et al. 2015

J Solid State Electrochem

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In this work, we present a method of obtaining of effective catalytic system composed of conducting polymer, poly(1,8-diaminocarbazole) (PDACz), with Au nanoparticles (AuNPs) of diameter 2 nm uniformly dispersed in the polymer matrix. Reduction of 4-nitrophenol (4-NPh) by NaBH 4 with the use of this catalyst was studied by means of UV-Vis spectroscopy. It was shown that the catalytic reaction obeys either pseudo-zero-order or first-order kinetics, depending on the concentration of 4-NPh in the solution at excessive amount of borohydride. The catalytic activity of PDACz/AuNP system is discussed in terms of amount of deposited nanoparticles and the number of consecutive catalytic cycles. The kinetic data are correlated with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images of the system before and after catalytic process.

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“…Nitrobenzene and 4-nitrophenol are pollutants often present in wastewater originated from industrial plants for production of paper, pharmaceuticals, dyes, and others [1,2].…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of catalytic reduction of 4-nitrophenol with NaBH4 by means of Au nanoparticles dispersed in a conducting polymer matrix

Fedorczyk

Ratajczak

Kuzmych

et al. 2015

J Solid State Electrochem

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“…20 A similar enhancement in the adsorption and photocatalytic activity of TiO 2 has been reported by loading a small amount of Pt nanoparticles (NPs) as cocatalyst, demonstrating the high effectiveness of loading metal NPs for enhancing TiO 2 photocatalysis, 21 which is beneficial from a stronger coupling between adsorbate and TiO 2 to accelerate the photogenerated electron transfer. 22 Although previous studies have shown the high catalytic ability of metal NPs−TiO 2 composite toward the photodegradation of various organic pollutants and identified the decomposition pathways, 15,23 the molecule-level mechanism of metal NPs−TiO 2 composite catalyst remains unclear. Specifically, the molecular configurations of the adsorbed pollutants and intermediates on the catalyst surface, which significantly affect the catalyst−pollutant interactions, are not identified yet.…”

Section: ■ Introductionmentioning

confidence: 99%

Roles of Crystal Surface in Pt-Loaded Titania for Photocatalytic Conversion of Organic Pollutants: A First-Principle Theoretical Calculation

Chen

Wang

et al. 2015

ACS Appl. Mater. Interfaces

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Titania modified with nanosized metallic clusters is found to substantially enhance its photocatalytic capacity for renewable energy generation and environmental purification, but the underlying mechanism, especially the roles of crystal surface in noble-metal-loaded TiO2, remain unclear. In this work, such roles in the Pt-loaded anatase TiO2 for the photocatalytic conversion of nitrobenzene (NB), a model pollutant, are explored by first-principle calculations. The theoretical calculations reveal that the Pt-TiO2 complex has a higher catalytic activity toward NB conversion than pure Pt clusters, and the (001) facets of TiO2 in this complex tend to accumulate more positively charged holes and thus have a higher photocatalytic activity than the (101) facets. Furthermore, the thermodynamic and kinetic results also show that the Pt cluster loaded on the (001) surface of anatase TiO2 is favored for NB conversion in the photooxidation pathway. This work deepens our fundamental understanding on the evolution of molecule-photocatalyst interface and provides implications for designing and preparing photocatalysts.

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“…The reduction peak for nitrobenzene was observed at À607 mV in the reductive scan with higher peak current and the corresponding oxidation peak was observed at À18 mV in the oxidative scan. The observed reduction peak is ascribed to the reduction of nitrobenzene (Ar-NO 2 ) to phenylhydroxylamine (Ar-NHOH) through single step four electrons transfer process [8,35]. The observation of oxidation peak at À18 mV reveals the oxidation of phenylhydroxylamine (Ar-NHOH) to nitrosobenzene (Ar-NO) via a two-electron transfer process [8,35].…”

Section: Electrocatalysis Of Nitrobenzene and Nitrite Ionsmentioning

confidence: 99%

Electroanalysis of nitrobenzene derivatives and nitrite ions using silver nanoparticles deposited silica spheres modified electrode

Rameshkumar

Ramaraj

2014

Journal of Electroanalytical Chemistry

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Electrochemical reduction of nitrobenzene at carbon nanotube electrode

Cited by 192 publications

References 18 publications

Kinetic studies of catalytic reduction of 4-nitrophenol with NaBH4 by means of Au nanoparticles dispersed in a conducting polymer matrix

Kinetic studies of catalytic reduction of 4-nitrophenol with NaBH4 by means of Au nanoparticles dispersed in a conducting polymer matrix

Roles of Crystal Surface in Pt-Loaded Titania for Photocatalytic Conversion of Organic Pollutants: A First-Principle Theoretical Calculation

Electroanalysis of nitrobenzene derivatives and nitrite ions using silver nanoparticles deposited silica spheres modified electrode

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