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A Novel Route to Synthesize Hypercross-linked Conjugated Polystyrene for CO₂ Sorption
Rajangam Vinodh(라자감 비노드),Aziz Abidov(아비도프 아지즈),Mei Mei Peng(펭메이메이),Cadiam Mohan Babu(칸디암 모한 바부),Muthiahpillai Palanichamy(무따이 팔라리차미),Wang Seog Cha(차왕석),Hyun-Tae Jang(장현태) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
Polystyrene is cross-linked to generate micropores for sorption applications. Herein, we report for the first time, hypercross-linking of polystyrene in the presence of Friedel-Crafts catalyst, FeCl3 without a cross-linker. For comparison, polystyrene was also hypercross-linked with a cross-linker, dimethoxy methane with the same catalyst. The cross-linking and de-hydrogenation of cross-links to quinonoid formation were confirmed by FT-IR and 13C-NMR techniques. The hyper cross-linked polymers (HCPs) were also characterized by TGA, DRS-UV, SEM, BET and CO₂ sorption techniques. All the HCPs showed a maximum of 5 weight % CO₂ sorption at 25 °C and 1 atm. The same polymers could also be applied for the sorption of other air pollutants.
Cadiam Mohan Babu(칸디암 모한 바부),Rajangam Vinodh(라자감 비노드),Aziz Abidov(아비도프 아지즈),Mei Mei Peng(팽메이메이),Muthiahpillai Palanichamy(무따이 팔라리차미),WangSeogCha(차왕석),Hyun-Tae Jang(장현태) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
Mesoporous Fe2O₃/TiO₂ was synthesized by sol-gel route using pluronic P123 the as structure directing agent. The mesoporous nature of the material was confirmed from low angle X-ray diffraction. The material was supported on reduced graphene oxide and characterized by FT-IR, Raman, XPS, N2 sorption, HR-TEM and SEM. The reduced graphene oxide supported Fe2O₃/TiO₂ nanocomposite was tested for the sorption of both As(V) and As(III) from aqueous solution. The equilibrium adsorption attained within fifteen minutes for both As(III) and As(V). The maximum adsorption capacity for As(V) and As(III) was found to be 99.5 and 77.7 mg/g at pH 6 and 7 respectively. The sorption was found to high in the pH range of 6-7.
Selective Oxidation of Ethylbenzene over Cobalt Impregnated Zeolite ZSM-5
Mei Mei Peng(펭메이메이),Mani Ganesh(마니 가니쉬),Abidov Aziz(아비도프 아지즈),Ung Jin Jeon(전웅진),Rajangam Vinodh(라자감 비노드),Muthiahpillai Palanichamy(무따이 팔라리차미),Hyun Tae Jang(장현태) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-
A zeolite supported cobalt catalyst Co-ZSM-5 was synthesized and characterized by Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption-desorption and thermogravimetric analysis (TGA). The synthesized catalyst was used for ethylbenzene oxidation reaction. The catalytic reaction was carried out in liquid phase using oxygen as oxidizing agent in solvent-free condition. The results analyzed by Gas chromatography (GC) displayed the catalyst was effective for ethyl benzene oxidation.