Synthesis, characterisation and application of an exfoliated graphite–diamond composite electrode in the electrochemical degradation of trichloroethylene

Ntsendwana, Bulelwa; Mamba, Bhekie B.; Sampath, S. R.; Arotiba, Omotayo A.

doi:10.1039/c3ra44977g

Cited by 21 publications

(7 citation statements)

References 44 publications

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“…Exfoliated graphite (EG) material was synthesized using the methods reported in literature . Briefly, natural graphite flakes (NGF) of particle size 300–400 µm were first intercalated by immersing the particles in a mixture of concentrated H 2 SO 4 /HNO 3 in a ratio of 3 : 1 (v/v) for 24 h at ambient conditions.…”

Section: Methodsmentioning

confidence: 99%

An Exfoliated Graphite Based Electrochemical Sensor for As(III) in Water

2016

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In this work, we present the application of an exfoliated graphite electrode modified with gold nanoparticles (AuNPs) for the detection of As(III) in acidic media. Gold nanoparticles were deposited on the surface of an exfoliated graphite electrode by electrodeposition at a potential window of −0.2 V to 1.2 V. This was followed by activation in 0.5 M H2SO4 with 10 cycles from 0.6 V to 1.4 V. The modification of exfoliated graphite (EG) showed an increased electroactive surface area of the electrode and improved peak current output in a Fe(CN)63−/4− redox probe. EG‐AuNPs electrode was used to detect As(III) in 1.0 M HNO3 using square wave anodic stripping voltammetry (SWASV) technique at optimum conditions of pH 3, deposition potential of −0.8 V, deposition time of 180 s, frequency of 5 Hz and pulse amplitude of 50 mV. The EG‐AuNPs electrode detected As(III) in solution to a limit of 0.58 ppb with regression of 0.9993. The method reported is simple, cheap and possesses good reproducibility. The developed electrochemical sensor was applied in the detection of As (III) in an industrial real water sample. The results of the real water sample analysis from the developed method are comparable with the inductively coupled plasma – optical emission spectroscopy (ICP‐OES) results.

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Section: Methodsmentioning

confidence: 99%

An Exfoliated Graphite Based Electrochemical Sensor for As(III) in Water

2016

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“…Electrochemical (EC) oxidation processes of wastewater are attractive due to their simplicity, low energy consumption and environmental friendliness. [1][2][3] The desired electrode material must fulll four requirements, including long lifetime, high catalytic activity, low cost and no secondary pollution. [4][5][6][7][8] Dimensionally stable anodes (DSAs) have received much attention due to the advantages of high electric catalytic activity, low cost, and simple preparation methods, among others.…”

Section: Introductionmentioning

confidence: 99%

An improved stable Ti/Sb–SnO2 electrode with high performance in electrochemical oxidation processes

Shao

et al. 2014

RSC Adv.

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“…The expanded graphite was prepared by employing our previous technique. 35,36 Sied akes of natural graphite (300 mm) were immersed in a 1 : 3 (vol/vol) mixture of concentrated nitric and sulphuric acids for 48 h at ambient conditions for the intercalation of the graphite material. The intercalated graphitic material was washed properly to achieve a pH value close to 7, and dried in the air.…”

Section: Synthesis Of Expanded Graphite (Eg)mentioning

confidence: 99%