A new sensitive organic/inorganic hybrid material based on titanium oxide for the potentiometric detection of iron(III)

Bécuwe, Matthieu; Rouge, Pascal; Gervais, Christel; Courty, Matthieu; Dassonville‐Klimpt, Alexandra; Sonnet, Pascal; Baudrin, Emmanuel

doi:10.1016/j.jcis.2012.08.029

Cited by 14 publications

(9 citation statements)

References 50 publications

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“…From literature data it is known that upon heating of anatase, between room temperature and 200 1C, a mass loss occurs mainly through two phenomena: first, the desorption of water followed by the second one which is the condensation/elimination of surface OH groups. 67 Hence, the endothermic process as well as the total weight loss in the case of bare TiO 2 can be explained in such a way. The exothermic processes, according to MS signals, correspond to the decomposition of bound catechol and its incomplete (He) or complete (air) mineralization to H 2 O and CO 2 , thus explaining the difference in weight loss.…”

Section: Thermal Analysismentioning

confidence: 97%

The effect of substituents on the surface modification of anatase nanoparticles with catecholate-type ligands: a combined DFT and experimental study

Savić

Čomor

Nedeljković

et al. 2014

Phys. Chem. Chem. Phys.

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The surface modification of nanocrystalline TiO2 particles (45 Å) with catecholate-type ligands having different electron donating/electron withdrawing substituent groups, specifically 3-methylcatechol, 4-methylcatechol, 3-methoxycatechol, 3,4-dihydroxybenzaldehyde and 4-nitrocatechol, was found to alter the optical properties of nanoparticles in a similar way to catechol. The formation of the inner-sphere charge-transfer (CT) complexes results in a red shift of the semiconductor absorption compared to unmodified nanocrystallites and a reduction of the effective band gap, being slightly less pronounced in the case of electron withdrawing substituents. The investigated ligands have the optimal geometry for binding to surface Ti atoms, resulting in ring coordination complexes of the catecholate type (binuclear bidentate binding-bridging) thus restoring six-coordinated octahedral geometry of surface Ti atoms. From the absorption measurements (Benesi-Hildebrand plot), the stability constants in methanol/water = 90/10 solutions at pH 2 in the order of 10(3) M(-1) have been determined. The binding structures were investigated by using FTIR spectroscopy. Thermal stability of CT-complexes was investigated by using TG/DSC/MS analysis. Quantum chemical calculations on model systems using density functional theory (DFT) were performed to obtain the vibrational frequencies of charge transfer complexes, and the calculated values were compared with the experimental data.

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Section: Thermal Analysismentioning

confidence: 97%

The effect of substituents on the surface modification of anatase nanoparticles with catecholate-type ligands: a combined DFT and experimental study

Savić

Čomor

Nedeljković

et al. 2014

Phys. Chem. Chem. Phys.

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show abstract

“…It is quite evident that the mass profiles of CO 2 follow the profile of heat flow curves, while those of H 2 O show that water is liberated nearly in the whole temperature range. From literature data it is known that upon heating of anatase, between room temperature and 200°C, a mass loss occurs mainly through two phenomena: first, the desorption of water followed by the second one which is the condensation/ elimination of surface OH groups [86]. Hence, the endothermic process as well as the total weight loss in the case of bare TiO 2 can be explained in such a way.…”

Section: Thermal Analysismentioning

confidence: 99%

Anatase nanoparticles surface modified with fused ring salicylate-type ligands (1-hydroxy-2-naphthoic acids): A combined DFT and experimental study

Savić

Čomor

Abazović

et al. 2015

Journal of Alloys and Compounds

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“…The phosphonate functional group not only makes L water soluble, but allows for the formation of robust self-assembled monolayers on a variety of surfaces. Thus, phosphonates have been utilized for the surface modification of a wide range of oxide substrates [47] such as titania [48,49], alumina [50], iron oxides [51], hafnium oxide [52], indium-tin oxide (ITO) [53], and silica [54]. Phosphonate-anchored SAMs are easily prepared in air, and form well-ordered strongly bound films on oxide surfaces with molecular densities close to those found in single crystals [55].…”

Section: Resultsmentioning

confidence: 99%

Rational design of a material for rapid colorimetric Fe2+ detection

et al. 2016

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Wereport on the rational design of a novel TiO2 based screen-printed material suitable for sensitive and selective\ud detection of iron ions in water. This includes the synthesis and characterization of large mesoporous TiO2 nanostructures,\ud screen-printing of thick titania films on glass surfaces and their functionalization with 2,2′:6′,2″-\ud terpyridin-4′-ylphosphonic acid (terpy). The ultra-high affinity between iron ions and the TiO2-anchored terpy\ud receptor makes this system potentially applicable to the analysis of iron in environmental, food, biological, and\ud biomedical systems by a readily quantifiable colour change. Rapid (b30 s) colour change of the material from\ud white to magenta permits easy detection of as low as 0.3 ppm of Fe2+ by the naked eye. The intensity of the colour\ud change depends on the nature of the nanoparticles, the overall TiO2 film thickness, and the Fe2+ concentration.\ud The material was characterized using profilometry, diffuse reflectance UV–vis spectroscopy, and X-ray\ud photoelectron spectroscopy (XPS) before and after treatment with aqueous solutions of Fe2+. The designed material\ud shows colour reversibility upon treatment with EDTA solutions, which allows for multiple reuses of the\ud same film with no effect on sensitivity

show abstract

A new sensitive organic/inorganic hybrid material based on titanium oxide for the potentiometric detection of iron(III)

Cited by 14 publications

References 50 publications

The effect of substituents on the surface modification of anatase nanoparticles with catecholate-type ligands: a combined DFT and experimental study

The effect of substituents on the surface modification of anatase nanoparticles with catecholate-type ligands: a combined DFT and experimental study

Anatase nanoparticles surface modified with fused ring salicylate-type ligands (1-hydroxy-2-naphthoic acids): A combined DFT and experimental study

Rational design of a material for rapid colorimetric Fe2+ detection

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