Chitosan as template for the synthesis of ceria nanoparticles

Sifontes, Ángela B.; González, Gema; Ochoa, José Luís; Tovar, Leidy M.; Zoltan, Tamara; Cañizales, Edgar

doi:10.1016/j.materresbull.2011.07.049

Cited by 56 publications

(38 citation statements)

References 23 publications

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“…The synthesis of Sr-Fe-O system was carried out using chitosan as template and as metal precursor salts iron (III) citrate hydrate (98%, Aldrich) and strontium nitrate (99%, Aldrich) following procedures already reported [29][30]. Briefly, chitosan was mixed with 80 mL of CH 3 COOH (3%, v/v).…”

Section: Synthesismentioning

confidence: 99%

“…Furthermore, due to its cationic character, it can form polyelectrolyte complexes with metals and anionic biomolecules [24][25][26][27]. The use of chitosan as template provides a non-surfactant route that is proposed as an inexpensive and environmentally friendly alternative method for synthesis of metal oxide nanoparticles [28][29][30][31]. In this context, we report herein for the first time, the use of chitosan as template for the synthesis of a nanocrystalline system based on strontium ortho/hexagonal ferrites.…”

Section: Introductionmentioning

confidence: 99%

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Chitosan templated synthesis of strontium–iron–oxygen nanocrystalline system

Sifontes

Toro

Ávila

et al. 2015

Ceramics International

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Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chitosan templated synthesis of strontium–iron–oxygen nanocrystalline system

Sifontes

Toro

Ávila

et al. 2015

Ceramics International

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“…The literature reports various methods for preparation of catalytic supports, such as conventional sol-gel [22,23], polymeric precursor [21,24], hybrid spheres [25,26], and coprecipitation [27,28]. Many of the existing techniques have a considerable cost and take significant time and typically use precursors from nonrenewable sources compared to the proteic sol-gel route proposed here, which uses gelatin from porcine skin as organic precursor (renewable source) and aluminum nitrate and/or tetraorthosilicate (TEOS) as inorganic precursors.…”

Section: Introductionmentioning

confidence: 99%

Gelatin Template Synthesis of Aluminum Oxide and/or Silicon Oxide Containing Micro/Mesopores Using the Proteic Sol-Gel Method

Oliveira

Paulista

Alencar

et al. 2017

Journal of Nanomaterials

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Aluminum oxide and/or silicon oxide-based supports were synthesized by proteic sol-gel method. The characterization was performed through the analysis of TG, XRD, FTIR, SEM, and N 2 physisorption. The XRD diffractograms showed an amorphous material profile. TG results indicate the total liberation of the organic and inorganic material in the calcination temperature used, occurring in different mass loss range. This piece of information was reaffirmed by the FTIR spectra, which presented characteristic bands of gelatin structure before calcinations which disappear in the spectrum of the solid after calcinations, indicating the loss of organic matter from gelatin after heat treatment. The spectra exhibited M-O stretching vibration at low wavenumbers after calcinations related to metal oxides. The acquired images by SEM suggest the obtaining of a highly porous material with very different characteristics depending on the composition of the support. The N 2 isotherms indicate the presence of a micro/mesoporous oxide with interesting textural properties, particularly for the supports containing aluminum and silicon oxide. The ethanol dehydration results showed greater selectivity to diethyl ether compared to ethylene. From the reaction data, the following order of acid strength was obtained: 2Si-Al > Si-2Al > Si-Al > Al, which is related to the Si-Al ratio.

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“…Despite the importance of emphasizing on the geometry, size and chemical homogeneity, the overall feasibility and simplicity of the ZnO synthesis processes are also greatly considered to improve the efficiency of the fabrication process. Most of these synthesizing techniques are usually associated with energy consuming and multi-step time methods which are not environmentally friendly [7]. Extrusion dripping is a novel technique which mainly comprises of the extruding of desired solution through a narrow passageway and dripping it into a gelation bath.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

Keong

Vivek

Salamatinia

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. In this study, zinc oxide (ZnO) was prepared via extrusion-dripping method through an ion exchange mediated process using sodium alginate. The samples were synthesized at 500 ˚C and 600 ˚C to study the effect of calcination temperature. The morphology, microstructure and optical activity of the calcined ZnO nanoparticles were analyzed by TGA, FESEM and XRD. It was found that ZnO nanoparticles synthesized at 600 ˚C was of higher purity with high crystallinity. To enhance the photocatalytic efficiency of zinc oxide, ZnO/NCC films were synthesized at varying ZnO loading fractions of 10 wt%, 15 wt%, 20 wt% and 25 wt% and were evaluated by photodegradation of Methylene blue dye and the highest dye percentage removal is found to be 96% which is obtained at ZnO loadings of 25 wt%. The usage of ionexchange process has shown promising results in producing ZnO of desirable characteristics.

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Chitosan as template for the synthesis of ceria nanoparticles

Cited by 56 publications

References 23 publications

Chitosan templated synthesis of strontium–iron–oxygen nanocrystalline system

Chitosan templated synthesis of strontium–iron–oxygen nanocrystalline system

Gelatin Template Synthesis of Aluminum Oxide and/or Silicon Oxide Containing Micro/Mesopores Using the Proteic Sol-Gel Method

Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

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