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- 저자 : Zahra Shariatinia (검색결과 3 건)
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Zahra Shariatinia 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
Ten butterfly-shaped compounds based on fluorene–dithiophene (FDT) core containing para-substitutedN,N-phenylamine moieties were designed as hole transporting materials (HTMs) for perovskite solar cells(PSCs). Among different HTMs, only HOMO level of NO2 containing molecule was placed lower than thethat of CH3NH3PbI3 (MAPbI3) perovskite which confirmed all materials but the NO2 substituted compoundcould efficiently inject holes from the MAPbI3 towards the Au cathode electrode. Also, theLUMO levels of all HTMs indicated higher energies compared to that of MAPbI3 verifying inhibited electronbackward transport to the Au cathode electrode. The HTM with NMe2 substituent showed maximumhole mobility of 1.033 103 cm2V1s1 which was greater than those of the reference FDT-OMe HTMand Spiro-OMeTAD. The FDT-H illustrated the biggest open-circuit voltage (VOC), fill factor (FF) and powerconversion efficiency (PCE) of 1.149 V, 0.895 and 23.342%, respectively, establishing it could be the bestHTM candidate for high performance MAPbI3-based PSCs. The photovoltaic parameters of PSCs containingformamidinium lead iodide (FAPbI3) and FDT-core or Spiro-OMeTAD HTMs were superior to those ofthe MAPbI3-based solar cells.
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Elham Geravand,Zahra Shariatinia,Fereydoon Yaripour,Saeed Sahebdelfar 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.12
Two types of copper-based dehydrogenation nanocatalysts (Cu/ZnO/Al2O3 and Cu/SiO2) were prepared from various precursors by impregnation (IM), sol-gel (SG) and co precipitation (COPRE) methods. The structures of samples were characterized by N2 adsorption-desorption, XRD, XRF, TPR, N2O-Titration, FT-IR, FE-SEM and TEM techniques. The catalytic performance tests in vapor-phase dehydrogenation of 2-butanol to methyl ethyl ketone (MEK) were carried out in a fixed-bed reactor at a temperature of 260 oC under atmospheric pressure and LHSV of 4mL/(h·g cat). The experimental results indicated that (i) the copper oxide over the COPRE nanocatalyst was reduced at a lower temperature (222 oC) in comparison with the CuO reduced on the SG and IM samples (243 and 327 oC, respectively). Also, the percentage of reduction of CuO species on COPRE catalyst was the highest (98.8%) in comparison with the two other samples, (ii) the COPRE nanocatalyst exhibited the highest activity for the dehydrogenation of 2-butanol to MEK, and (iii) co-precipitation method was selected as an optimum method for preparation of nanocatalyst. The central composite experimental design method was applied for investigation of the effects of four critical preparation factors on the MEK selectivity of Cu/ZnO/Al2O3 nanocatalyst. The results showed that Cu/Zn molar ratio and precipitation pH are the most effective factors on the response and the optimum conditions for synthesis of Cu/ZnO/Al2O3 nanocatalyst with maximum selectivity of MEK were T(pre)=67.5 oC, T(aging)=68.8 oC, pH(pre)=7.27 and Cu/Zn molar ratio=1.38. The performance of the prepared nanocatalyst at the optimum conditions was comparable to the commercially available nanocatalyst.
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Fatemeh Emami,Shahla Shekarriz,Zahra Shariatinia,Zahra Moridi Mahdieh 한국섬유공학회 2018 Fibers and polymers Vol.19 No.5
Nylon 6 fabric with self-cleaning properties was prepared by corona discharge pre-treatment and coating with TiO2 nanoparticles (NPs) using pad-dry-cure technique. The self-cleaning property was studied by discoloration of methylene blue (MB), ketchup, tea and coffee stains from the corona+TiO2 treated nylon-6 fabric. Color difference (ΔΕ*), reflectance (R) and K/S of MB stain were investigated by diffuse reflectance spectrophotometry. The MB stain was almost completely removed from the corona+TiO2 treated nylon surface after 24 h under UV light/daylight irradiation. Both of these phenomena (corona and TiO2) led to an increase in the discoloration of stains under UV and daylight irradiations. The EDS analysis showed an increase in the concentration of deposited TiO2 NPs coating after corona treatment. The FE-SEM images revealed that the surface of nylon 6 was coarser after the corona treatment. Also, the FE-SEM micrographs exhibited that a uniform layer of TiO2 NPs was formed on the corona treated nylon fabric. The corona+TiO2 treated nylon illustrated antibacterial activity against E. coli and B. subtillis microorganisms. The EDS and FE-SEM analysis confirmed that after 5 washing cycles, the amount of TiO2 NPs was higher on the surface of corona+TiO2 treated nylon than that of the fabric only treated with TiO2 without corona pretreatment. This result justifies that the corona+TiO2 treated nylon fabric with appropriate self-cleaning property can be applied cost-effectively in the textile industry.
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