Functionalization of glassy carbon spheres by ball milling of aryl diazonium salts

Malingappa, Pandurangappa; Ramakrishnappa, T.; Compton, Richard G.

doi:10.1016/j.carbon.2009.03.068

Cited by 38 publications

(19 citation statements)

References 31 publications

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“…Ball milling induces the decomposition of diazonium salts under the influence of frictional forces generated by the collision between the reactant surfaces resulting in increasing internal energy temperature. Hence, Pandurangappa et al [72] showed the efficiency of surface modification of glassy carbon spheres with p-nitrobenzenediazonium tetrafluoroborate using ball mill grinding. Note, however, they emphasized that high temperature generated from the ball mill grinding may transform the diazonium salts to explosive reagents.…”

Section: Carbon Black Carbon Spheres and Carbon-coated Metallic Partmentioning

confidence: 99%

Functionalization of nanomaterials with aryldiazonium salts

Mohamed

Salmi

Dahoumane

et al. 2015

Advances in Colloid and Interface Science

159

137

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Section: Carbon Black Carbon Spheres and Carbon-coated Metallic Partmentioning

confidence: 99%

Functionalization of nanomaterials with aryldiazonium salts

Mohamed

Salmi

Dahoumane

et al. 2015

Advances in Colloid and Interface Science

159

137

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“…The spectra of native and modified MWCNTs (Fig. 1b) showed C 1s peak at 284 eV and O1s peak at 530 eV which can be attributed to the presence of carbon and oxygen atom containing functionalities on the CNTs respectively [18]. The spectra of modified CNT showed an additional peak at 400 eV which is due to the presence of nitrogen atom [19].…”

Section: Resultsmentioning

confidence: 92%

Covalently modified multiwalled carbon nanotubes as a new voltammetric interface for the determination of mercury at picomolar level

Kempegowda

Malingappa

2012

Electrochemistry Communications

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a b s t r a c t a r t i c l e i n f oCovalent bulk modification of multiwalled carbon nanotubes using Fast Violet B salt containing potential donor atoms towards mercury is described. The chemically modified CNTs were characterized by FTIR and XPS techniques. The aqueous colloidal solution of modified CNTs was used in the construction of electrochemical interface for the determination of mercury at picomolar level. The analytical utility of the proposed sensor has been validated by estimating the mercury content in real sample matrices like drinking water and industrial effluent samples.

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“…XPS study X-ray photoelectron spectroscopy is a non-destructive technique in which the electron-binding energies of the atoms have been used to analyze the elemental composition, chemical states, and also the type of bonding of the modifier molecule on the substrate surface [27]. The XPS spectra of the native and modified glassy carbon spheres are shown in Fig.…”

Section: Ftir Studymentioning

confidence: 99%

Chemically functionalized glassy carbon spheres: a new covalent bulk modified composite electrode for the simultaneous determination of lead and cadmium

Raghu

Sampath

Malingappa

2011

J Solid State Electrochem

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A new type of covalent bulk modified glassy carbon composite electrode has been fabricated and utilized in the simultaneous determination of lead and cadmium ions in aqueous medium. The covalent bulk modification was achieved by the chemical reduction of 2-hydroxybenzoic acid diazonium tetrafluroborate in the presence of hypophosphorous acid as a chemical reducing agent. The covalent attachment of the modifier molecule was examined by studying Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and the surface morphology was examined by scanning electron microscopy images. The electrochemistry of modified glassy carbon spheres was studied by its cyclic voltammetry to decipher the complexing ability of the modifier molecules towards Pb 2+ and Cd 2+ ions. The developed sensor showed a linear response in the concentration range 1-10 μM with a detection limit of 0.18 and 0.20 μM for lead and cadmium, respectively. The applicability of the proposed sensor has been checked by measuring the lead and cadmium levels quantitatively from sewage water and battery effluent samples.

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Functionalization of glassy carbon spheres by ball milling of aryl diazonium salts

Cited by 38 publications

References 31 publications

Functionalization of nanomaterials with aryldiazonium salts

Functionalization of nanomaterials with aryldiazonium salts

Covalently modified multiwalled carbon nanotubes as a new voltammetric interface for the determination of mercury at picomolar level

Chemically functionalized glassy carbon spheres: a new covalent bulk modified composite electrode for the simultaneous determination of lead and cadmium

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