Diazonium-induced anchoring process: an application to improve the monovalent selectivity of cation exchange membranes

Le, Xuan Tuan; Viel, Pascal; Jégou, Pascale; Garcia, Alexandre; Berthelot, Thomas; Bui, Tien D.; Palacin, Serge

doi:10.1039/b918915g

Cited by 68 publications

(64 citation statements)

References 38 publications

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“…And, on a closer inspection at the changes in anion exchange capacity from the weak base groups, it can be concluded that the modified layer should be very thin. In addition, for M1, a relatively low cation exchange capacity resulting from the grafting carboxyl groups also indicated that the modified layer formed by the chemical reduction of aryl diazonium salts should be very thin, which agreed well with the experimental results reported in literatures [24]. On the other hand, it can be seen clearly from Fig.…”

Section: Current-voltage (I-v) Curvessupporting

confidence: 88%

Surface Modification of Anion Exchange Membrane by Covalent Grafting for Imparting Permselectivity between Specific Anions

Wang

Jia

et al. 2015

Electrochimica Acta

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Section: Current-voltage (I-v) Curvessupporting

confidence: 88%

Surface Modification of Anion Exchange Membrane by Covalent Grafting for Imparting Permselectivity between Specific Anions

Wang

Jia

et al. 2015

Electrochimica Acta

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“…19,20 The mechanism to graft a polyaminophenyl layer on the titanium nitride surface involved diazotisation of the p-phenylenediamine in acidic solution ( Fig. 7-1).…”

Section: Modification Of Tin Surfaces With Aminophenyl Groups In the mentioning

confidence: 99%

“…The copolymer is then functionalized by the introduction of a sulfonate ion exchange group. 20 Thanks to the ion exchange property, the membrane is also a conducting material but unlike titanium nitride, it does not behave metallically. Figure 8 shows XPS survey spectra of the membrane surface before and after modification.…”

Section: Modification Of Tin Surfaces With Aminophenyl Groups In the mentioning

confidence: 99%

“…electrochemical power supply, ultraviolet light source, heating or sonicating systems) and works by simply immersing the substrate into the diazonium salt solutions with or without the presence of a reducing agent. [19][20][21] Consequently, chemical grafting will be taken into consideration in this work. First, we will perform spontaneous grafting of TiN with the diazonium salt of 1,4phenylenediamine.…”

Section: Introductionmentioning

confidence: 99%

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On the chemical grafting of titanium nitride by diazonium chemistry

et al. 2015

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Current research directions with the aim of extending the applications of titanium nitride (TiN) in areas of microelectronics, electrocatalysis, biosensors etc. require identifying new and efficient methods to modify this durable material with desired organic functionalities. We have clearly demonstrated in this work that diazonium chemistry can be considered for surface modification of titanium nitride. Indeed, a near-monolayer of aminophenylene has been reported to be spontaneously grafted onto the TiN surface by simple immersion of the substrates into an acidic solution of the corresponding diazonium cations. X-ray photoelectron spectroscopy measurements strongly suggested a covalent coating of aminophenyl groups on titanium nitride. Surface functionalization with aminophenylene layers was also investigated in presence of hypophosphorous acid and iron powder. Effect of these homogeneous and heterogeneous reducing agents with respect to the formation of aryl layers at different thicknesses was discussed in detail on the basis of conventional hemolytic dediazoniation mechanism in combination with the XPS results.The reduction of diazonium cations can be achieved by different ways such as electrochemical reduction, ultrasonication, photochemistry, microwave heating etc.

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“…Moreover, it often causes a decrease in ion exchange capacity. Thereupon, Le et al proposed a more effective method that a diazonium-induced anchoring process could graft covalently a thin polyaniline-like layer on the surface of commercial CEM [6]. The experimental results showed that the modified layer could slightly reduce the adsorption nickel ions and increase the selectivity.…”

Section: Introductionmentioning

confidence: 93%

Preparation of proton selective membranes through constructing H+ transfer channels by acid–base pairs

Liu

Wang

et al. 2015

Journal of Membrane Science

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Diazonium-induced anchoring process: an application to improve the monovalent selectivity of cation exchange membranes

Cited by 68 publications

References 38 publications

Surface Modification of Anion Exchange Membrane by Covalent Grafting for Imparting Permselectivity between Specific Anions

Surface Modification of Anion Exchange Membrane by Covalent Grafting for Imparting Permselectivity between Specific Anions

On the chemical grafting of titanium nitride by diazonium chemistry

Preparation of proton selective membranes through constructing H+ transfer channels by acid–base pairs

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