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Sayyid Mahdi Rafigh

Bio: Sayyid Mahdi Rafigh is an academic researcher from Islamic Azad University. The author has contributed to research in topics: Curdlan & Adsorption. The author has an hindex of 4, co-authored 7 publications receiving 139 citations.

Papers
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TL;DR: In this paper, mesoporous chitosan-SiO2 nanoparticles (NPs) were successfully synthesized using TEM, FTIR, XRD, TGA, EDX, and (CHN) elemental analysis.
Abstract: Mesoporous chitosan–SiO2 nanoparticles (NPs) were successfully synthesized. The prepared nanoparticles were characterized using TEM, FTIR, XRD, TGA, EDX, and (CHN) elemental analysis. From TEM micrograph, chitosan–SiO2 NPs were sphere-like, pretty uniformly distributed with coarse surface. The average size of chitosan–SiO2 NPs was determined as 211 nm with DLS, which was confirmed by TEM. The mesoporous structure of chitosan–SiO2 NPs was characterized with N2 adsorption/desorption measurements. BET surface area was 621 m2 g–1 and the total pore volume was 0.71 m3 g–1. CO2 adsorption was evaluated by a volumetric method. Chitosan–SiO2 NPs showed a maximum CO2 adsorption capacity of 4.39 mmol g–1 at 25 °C and a high selective separation capacity for CO2 over N2 (SCO2/N2 = 15.46). The influence of amines on carbon dioxide adsorption was discussed. Stable CO2 adsorption/desorption was confirmed after six cycles of experiments. Therefore, chitosan–SiO2 NPs exhibit great potential for CO2 capture.

89 citations

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TL;DR: Paenibacillus polymyxa ATCC 21830 was used for the production of curdlan gum for first time and the results showed that the ANN model is much more accurate in prediction as compared to the RSM.

69 citations

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TL;DR: Novel carboxymethyl-curdlan microspheres, a water soluble curdlan derivative, synthesized in an aqueous alkaline medium using monochloroacetic acid, can be regenerated and re-used and fitted the pseudo-second-order model for adsorption.

16 citations

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TL;DR: In this article, the synthesis of nanocomposites with silver nanoparticles (Ag NPs) on the surface of reduced graphene oxide (RGO) nanosheets using microfluidization by celery seeds extract as a green reducing agent.

16 citations

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TL;DR: In this paper, graphene oxide nanosheets (GONs) were successfully synthesized to remove melanoid in the molasses-based distillation effluents, which is a dark brown recalcitrant pollutant.
Abstract: Melanoidins are dark brown recalcitrant pollutants found in the molasses-based distillery effluents. In this study, graphene oxide nanosheets (GONs) were successfully synthesized to remove melanoid...

13 citations


Cited by
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TL;DR: In this article, a novel and versatile EDTA functionalized magnetic chitosan composite adsorbent (Fe3O4-CS/EDTA) was fabricated for simultaneous removal of methyl blue (MB) and heavy metal (Pb(II) and Cu(II)) from complex wastewater.

248 citations

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TL;DR: It is demonstrated that the surface of SiO2 particles can be successfully functionalized with cationic PAPTCl and is expected to be promising for fabrication of many other functional polymer nanocomposites for environmental applications due to the universality of mussel inspired chemistry and well designability and good monomer adaptability of SI-ATRP.

233 citations

01 Jan 1978
TL;DR: For instance, this paper reported that dextran, curdlan, pullulau, and Xanthan gum were used to extract the dextrin from the hair of rodents.
Abstract: 자연에서 얻어지는 고무질로서는 여러 가지 종류의 것이 많으나 한천, 알긴산염, 카라기난(Carrageenan), 퍼셀라란(furcellaran)등은 해조로부터 추출되며 Pectin, arabic gum, karaya gum, tragacanth gum, ghatti gum, guargum, 메뚜기콩고무(Locust been gum), 사이리엄고무(psyllium seed gum)등은 식물로부터 추출된다. 특히 이외에도 미생물에서 분비되는 고무질인 다당(多糖)으로는 dextran, curdlan, pullulau, 잔산고무(Xanthan gum)등도 최근에 알려진 고무질이다. 여기에서는 미생물이 생산하는 고무질인 다당(多糖)인 Xanthan gum이 새로히 식품첨가물로 지정되었기에 Xanthan gum의 발견내역, 성질, 생산과 응용면을 소개한다.

156 citations

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TL;DR: A deep understanding of β-glucans with triple-helix chain conformation is essential for the successful applications of the natural medicines and biologics for a sustainable world.

99 citations

Journal ArticleDOI
TL;DR: EPS exhibit antitumor, anti-HIV, emulsion stabilization capacity, shear-thinning activity, suspension ability, high viscosities, excellent biocompatibility, high biodegradability and immunomodulatory properties.

97 citations