Electro-oxidation of nitrophenol by ruthenium oxide coated titanium electrode: Parametric, kinetic and mechanistic study

Kumar, Shailendra; Singh, Seema; Srivastava, Vimal Chandra

doi:10.1016/j.cej.2014.11.051

Cited by 119 publications

(32 citation statements)

References 44 publications

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“…For these reasons, nitrophenols are considered as a priority pollutant by the Environmental Protection Agency (EPA) of USA, and its concentration in natural waters is restricted to less than 10 mg/L [5,6]. Up to date, various techniques such as membrane filtration [7,8], microbial degradation [9,10], photocatalytic degradation [11,12], electro-Fenton method [13,14], electrocoagulation [15,16], adsorption [17,18], electrochemical treatment http://dx.doi.org/10.1016/j.apcatb.2016. 10.020 0926-3373/© 2016 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

Nickel nanoparticles decorated on electrospun polycaprolactone/chitosan nanofibers as flexible, highly active and reusable nanocatalyst in the reduction of nitrophenols under mild conditions

Karakaş

Çelebioğlu

Çelebı

et al. 2017

Applied Catalysis B: Environmental

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a b s t r a c tToday, the reduction of nitro aromatics stands a major challenge because of the pollutant and detrimental nature of these compounds. In the present study, we show that nickel(0) nanoparticles (Ni-NP) decorated on electrospun polymeric (polycaprolactone(PCL)/chitosan) nanofibers (Ni-NP/ENF) effectively catalyze the reduction of various nitrophenols (2-nitrophenol, 2,4-dinitrophenol, 2,4,6-trinitrophenol) under mild conditions. Ni-NP/ENF nanocatalyst was reproducibly prepared by deposition-reduction technique. The detailed characterization of these Ni-NP/ENF based nanocatalyst have been performed by using various spectroscopic tools including ICP-OES, P-XRD, XPS, SEM, BFTEM, HRTEM and BFTEM-EDX techniques. The results revealed the formation of well-dispersed nickel(0) NP (d mean = 2.71-2.93 nm) on the surface of electrospun polymeric nanofibers. The catalytic activity of the resulting Ni-NP/ENF was evaluated in the catalytic reduction of nitrophenols in aqueous solution in the presence of sodium borohydride (NaBH 4 ) as reducing agent, in which Ni-NP/ENF nanocatalyst has shown high activity (TOF = 46.2 mol 2-nitrophenol/mol Ni min; 48.2 mol 2,4-dinitrophenol/mol Ni min; 65.6 mol 2,4,6-trinitrophenol/mol Ni min). More importantly, due to the nanofibrous polymeric support, Ni-NP/ENF has shown a flexible characteristics along with reusability property. Testing the catalytic stability of Ni-NP/ENF revealed that this new catalytic material provides high reusability performance (at 3rd reuse 86% for 2-nitrophenol, 83% 2,4-dinitrophenol and 82% 2,4,6-trinitrophenol) for the reduction of nitrophenols even at room temperature and under air. The present study reported here also includes the compilation of wealthy kinetic data for Ni-NP/ENF catalyzed the reduction of nitrophenols in aqueous sodium borohydride solution depending on temperature and type of support material (Al 2 O 3 , C, SiO 2 ) to understand the effect of the support material and determine the activation parameters.

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Section: Introductionmentioning

confidence: 99%

Nickel nanoparticles decorated on electrospun polycaprolactone/chitosan nanofibers as flexible, highly active and reusable nanocatalyst in the reduction of nitrophenols under mild conditions

Karakaş

Çelebioğlu

Çelebı

et al. 2017

Applied Catalysis B: Environmental

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“…They concluded that hybrid process of EO and electrocoagulation (EC) could form the basis of a process capable of removing COD effectively from real domestic, municipal and industrial wastewaters. Kumar et al [124] investigated mechanism of electrochemical degradation of p-nitrophenol by ruthenium oxide coated titanium electrode. Various intermediates such as quinine, benzoquinone, organic acids and small mineralization products were obtained during the treatment.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Recent developments of electro-oxidation in water treatment — A review

Särkkä

Bhatnagar

Sillanpää

2015

Journal of Electroanalytical Chemistry

358

129

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“…These techniques can be also applied in treatment of wastewater containing dyes used in textile industry. TiO 2 -RuO 2 /Ti electrodes are typical dimensionally stable anodes (DSA) which are commonly applied in the oxidation of organic compounds which occurs with simultaneous evolution of oxygen [2][3][4]. DSA-type electrodes can be prepared with the application of different methods, e.g., thermal decomposition of polymeric precursors or thermal decomposition of precursor metal salts [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Corrosion Characterization of TiO2-RuO2/Ti Electrodes Modified with WO3

Kuśmierek

2019

Electrocatalysis

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DSA (dimensionally stable anodes)-type electrodes (TiO 2-RuO 2-WO 3 /Ti) were prepared by the thermal decomposition of proper metal precursor on titanium substrate. Electrochemical and corrosion characteristics of these electrodes were determined in [Fe(CN) 6 ] 3− /[Fe(CN) 6 ] 4− system and Na 2 SO 4 solution with the application of cyclic voltammetry and chronoamperometry. The electrode active surface area and the activity towards oxygen evolution were evaluated. Moreover, corrosion resistance of the tested electrodes was estimated by determination of basic corrosion parameters. The introduction of WO 3 into the oxide layer of the electrodes resulted in a decrease in electrode active surface area and in the number of active sites. The modified electrodes revealed lower activity towards OER but higher activity in organic oxidation. However, their stability was significantly higher in comparison with the non-modified electrode. Corrosion characteristics of the tested electrodes proved the highest corrosion resistance in the case of the electrode modified with 3% WO 3. The modification of TiO 2-RuO 2 /Ti with WO 3 seems to be advantageous in the application in electrochemical and photoelectrochemical degradation of organic pollutants.

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Electro-oxidation of nitrophenol by ruthenium oxide coated titanium electrode: Parametric, kinetic and mechanistic study

Cited by 119 publications

References 44 publications

Nickel nanoparticles decorated on electrospun polycaprolactone/chitosan nanofibers as flexible, highly active and reusable nanocatalyst in the reduction of nitrophenols under mild conditions

Nickel nanoparticles decorated on electrospun polycaprolactone/chitosan nanofibers as flexible, highly active and reusable nanocatalyst in the reduction of nitrophenols under mild conditions

Recent developments of electro-oxidation in water treatment — A review

Electrochemical and Corrosion Characterization of TiO2-RuO2/Ti Electrodes Modified with WO3

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