Aluminum phosphate dispersed on a cellulose acetate fiber surface

Lazarin, Angélica M.; Borgo, Claudemir Adriano; Gushikem, Yoshitaka; Kholin, Yu. V.

doi:10.1016/s0003-2670(02)01420-4

Cited by 21 publications

(11 citation statements)

References 25 publications

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“…In a previous work the procedure to obtain aluminum phosphate homogeneously dispersed on a cellulose fiber surface was reported. 23 The main feature of this material was its high ion-exchange capacity with high affinity towards Na + and K + while Li + did not show any affinity and practically was not exchanged on this matrix surface. Following a similar procedure, zirconium phosphate immobilized on a cellulose acetate fiber surface was prepared and the ion exchange process towards Li + , Na + and K + as well as the equilibrium constants were studied.…”

Section: Introductionmentioning

confidence: 93%

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The ion exchange properties and equilibrium constants of Li+, Na+ and K+ on zirconium phosphate highly dispersed on a cellulose acetate fibers surface

Borgo¹,

Lazarin²,

Kholin

et al. 2004

J. Braz. Chem. Soc.

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Fosfato de zircônio altamente disperso foi preparado reagindo acetato de celulose/ZrO 2 (ZrO 2 = 11 wt%, 1,0 mmol g -1 de átomo de zircônio por grama de material) com ácido fosfórico. Highly dispersed zirconium phosphate was prepared by reacting celullose acetate/ZrO 2 (ZrO 2 = 11 wt%, 1.0 mmol g -1 of zirconium atom per gram of the material) with phosphoric acid. High power decoupling magic angle spinning (HPDEC-MAS) 31 P NMR and X-ray photoelectron spectroscopy data indicated that HPO 4 2-is the species present on the membrane surface. The specific concentration of acidic centers, determined by ammonia gas adsorption, is 0.60 mmol g The high values of the separation factors S Na + /Li + and S K + /Li + (up to several hundreds) support the application of this material for the quantitative separation of Na + and K + from Li + from a mixture containing these three ions.

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Section: Introductionmentioning

confidence: 93%

“…26,27 Both the reasons to prefer this model and the criteria of model adequacy are discussed in detail elsewhere. 28 In this model, the surface of the sorbent is considered as the assemblage of the polydentate exchange centers, for instance:…”

Section: Equilibrium Constantsmentioning

confidence: 99%

The ion exchange properties and equilibrium constants of Li+, Na+ and K+ on zirconium phosphate highly dispersed on a cellulose acetate fibers surface

Borgo¹,

Lazarin²,

Kholin

et al. 2004

J. Braz. Chem. Soc.

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“…These modified materials are normally made by mixing the cellulose acetate and metal alkoxide solutions followed by a phase inversion process. [9][10][11][12] Numerous chemical modifications in cellulosic matrices with highly dispersed metal oxides have been reported in recent years. 8,[13][14][15][16][17][18][19][20][21][22][23] The preparation of chemically modified electrodes with films or fibers of polymers and metal oxides has attracted considerable interest for immobilization of electroactives species due to their excellent electron transfer properties.…”

Section: Introductionmentioning

confidence: 99%

Methylene blue immobilized on cellulose acetate with titanium dioxide: an application as sensor for ascorbic acid

Hoffmann¹,

Dias²,

Rodrigues³

et al. 2008

J. Braz. Chem. Soc.

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Neste trabalho, o corante azul de metileno foi imobilizado na superfície do acetato de celulose modificado com dióxido de titânio produzindo um material híbrido sólido denominado de CA-TiO 2 MB. O experimento produziu uma quantidade de 1,8 mmol g -1 de TiO 2 incorporado no acetato de celulose e uma quantidade de 0,170 0,005 mmol g -1 de azul de metileno adsorvido na superfície do CA-TiO 2 . Um eletrodo de pasta de carbono desse material foi usado para estudar a oxidação eletrocatalítica do ácido ascórbico pelas técnicas de voltametria cíclica e cronoamperometria. O pH da solução não afetou o potencial de pico de anódico nem a corrente de pico anódico ao variar de 3,0 a 7,0. A oxidação do analito ocorreu em 75 mV versus ECS em solução de KCl 1,0 mol L -1 e pH 7,0. A intensidade da corrente de pico anódico variou com a concentração de ácido ascórbico na faixa de 5,0 10 -4 mol L -1 to 4,5 10 -3 mol L . A resposta do eletrodo foi muito rápida, com um tempo decorrido de 1,0 s, mostrando potencial para ser utilizado como um sensor eletroquímico para a determinação de ácido ascórbico em produtos comerciais.In this work, methylene blue dye was immobilized on the surface of cellulose acetate modified with titanium dioxide, producing a solid hybrid material designated as CA-TiO 2 MB. The experiment yielded an amount of 1.8 mmol g -1 of TiO 2 incorporated in the cellulose acetate and an amount of 0.170 0.005 mmol g -1 of methylene blue adsorbed onto CA-TiO 2 surface. A carbon paste electrode of this material was used to study the electrocatalytic oxidation of ascorbic acid by cyclic voltammetric and chronoamperometric techniques. The pH of the solution had no effect on the anodic peak potential and anodic peak current when ranging from 3.0 to 7.0. The oxidation of the analyte occurred at 75 mV versus SCE in 1.0 mol L -1 KCl solution and pH 7.0. The intensity of the anodic peak current varied with the concentration of ascorbic acid from 5.0 10 -4 mol L -1 to 4.5 10 -3 mol L -1 and a linear correlation was observed, with a detection limit of 15 µmol L -1 , quantification limit of 50 µmol L -1 and a sensitivity of 7.1 µA L mol -1. The electrode response was very fast, with an elapsed time of about 1.0 s, showing the potentiality to be utilized as an electrochemical sensor for determination of ascorbic acid in commercial samples.Keywords: methylene blue, modified cellulose acetate, titanium dioxide, carbon paste electrode, ascorbic acid IntroductionThe development of sensors that allow the measurements of some analyte, which presents analytical or environmental interest, has continued to be of major concern during the past two decades. They use as electrochemical mediator species makes possible the attempt to exert more control over the chemical nature of an electrode and to attain the selectivity of electrochemical measurements. This development has helped the measurement of important analytes in medicine, pharmacy, manufactured food and other areas. The most common material that is usually employed as an inert support for th...

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“…They were used, in particular, to get keener insight into sorption and ion exchange equilibria on surfaces of such hybrids as cellulose acetate fibers (CAF) coated with Al 2 O 3 and modified with nitrogen-containing ligands [17], sol-gel derived SiO 2 /TiO 2 /Sb 2 O 5 mixed oxide [18], CAF coated with highly dispersed aluminum [19,20] and zirconium [21] phosphates, silica gel coated with 3-n-propyl(4-methylpyridinium) silsesquioxane chloride polymer [22,23], CAF coated with n-propyl-1,4-diazabicyclo(2.2.2)octane chloride [24], SiO 2 /Nb 2 O 5 prepared by the sol-gel method and modified with phosphoric acid [25], xerogels containing aniline [26] and xylenol orange groups [27], and others. This paper discusses the simulation of sorption equilibria of metal chlorides on the surface of 3-n-propylpyridinium silsesquioxane chloride polymer from ethanol media.…”

Section: Introductionmentioning

confidence: 99%

Simulation of adsorption equilibria on hybrid materials: Binding of metal chlorides with 3-n-propylpyridinium silsesquioxane chloride ion exchanger

Lucho

Panteleimonov

Kholin

et al. 2007

Journal of Colloid and Interface Science

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Aluminum phosphate dispersed on a cellulose acetate fiber surface

Cited by 21 publications

References 25 publications

The ion exchange properties and equilibrium constants of Li+, Na+ and K+ on zirconium phosphate highly dispersed on a cellulose acetate fibers surface

The ion exchange properties and equilibrium constants of Li+, Na+ and K+ on zirconium phosphate highly dispersed on a cellulose acetate fibers surface

Methylene blue immobilized on cellulose acetate with titanium dioxide: an application as sensor for ascorbic acid

Simulation of adsorption equilibria on hybrid materials: Binding of metal chlorides with 3-n-propylpyridinium silsesquioxane chloride ion exchanger

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