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RISS 인기검색어
- 검색키워드
- 저자 : Prabakaran Eswaran (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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One Pot Synthesis and Characterization of Alginate Stabilized Semiconductor Nanoparticles
Sundarrajan, Parani,Eswaran, Prabakaran,Marimuthu, Alexander,Subhadra, Lakshmi Baddireddi,Kannaiyan, Pandian Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.10
Uniform and well dispersed metal sulfide semiconductor nanoparticles incorporated into matrices of alginate biopolymer are prepared by using a facile in situ method. The reaction was accomplished by impregnation of alginate with divalent metal ions followed by reaction with thioacetamide. XRD analysis showed that the nanoparticles incorporated in the polymer matrix were of cubic structure with the average particle diameter of 1.8 to 4.8 nm. Field emission scanning electron microscopy and high resolution transmission electron microscopy images indicated that the particles were well dispersed and distributed uniformly in the matrices of alginate polymer. FT-IR spectra confirmed the presence of alginate in the nanocomposite. The crystalline nature and thermal stability of the alginate polymer was found to be influenced by the nature of the divalent metal ions used for the synthesis. The proposed method is considered to be a simple and greener approach for large scale synthesis of uniform sized nanoparticles.
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One Pot Synthesis and Characterization of Alginate Stabilized Semiconductor Nanoparticles
Parani Sundarrajan,Prabakaran Eswaran,Alexander Marimuthu,Lakshmi Baddireddi Subhadra,Pandian Kannaiyan 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.10
Uniform and well dispersed metal sulfide semiconductor nanoparticles incorporated into matrices of alginate biopolymer are prepared by using a facile in situ method. The reaction was accomplished by impregnation of alginate with divalent metal ions followed by reaction with thioacetamide. XRD analysis showed that the nanoparticles incorporated in the polymer matrix were of cubic structure with the average particle diameter of 1.8 to 4.8 nm. Field emission scanning electron microscopy and high resolution transmission electron microscopy images indicated that the particles were well dispersed and distributed uniformly in the matrices of alginate polymer. FT-IR spectra confirmed the presence of alginate in the nanocomposite. The crystalline nature and thermal stability of the alginate polymer was found to be influenced by the nature of the divalent metal ions used for the synthesis. The proposed method is considered to be a simple and greener approach for large scale synthesis of uniform sized nanoparticles.
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Bienvenu Gael Fouda-Mbanga,Eswaran Prabakaran,Kriveshini Pillay 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.4
This work highlights a novel method for the synthesis of carbon nanosheets coated on zirconium oxide nanoplate (CNS/ZrO2NPs) nanocomposite that is used as an adsorbent for Zn2+ ions removal from water. CNS/ZrO2NPs nanocomposite was prepared using CNS and ZrO2NPs by a hydrothermal method. This nanocomposite proved to be a good adsorbent for Zn2+ ion uptake at maximum pH of 8 and dosage of 20 mg. The Temkin isotherm model represented the adsorption process followed by the Langmuir isotherm with a maximum adsorption capacity of 606.06 mg g−1, above other adsorbents that have been reported for the removal of zinc ions. The adsorption kinetic process was best described by the pseudo-second-order kinetics, and it was found that the adsorption followed a chemisorption process. The thermodynamic parameters, such as enthalpy (ΔH), Gibbs free energy (ΔG), and entropy (ΔS), revealed that the adsorption was exothermic, spontaneous, and not random during the process. This metal-loaded adsorbent Zn2+-CNS/ZrO2NPs nanocomposite furthermore was reused in latent fingerprint detection and did demonstrate good selectivity and sensitivity on different surfaces by two donors. Therefore, Zn2+-CNS/ZrO2NPs nanocomposite may be reutilized as a good fingerprint marking agent in latent fingerprint (LFP) identification to circumvent secondary environmental pollution by the release of a spent adsorbent.
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