http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Dipali P. Upare,S. Park,M.S. Kim,Y.-P. Jeon,J. Kim,D. Lee,J. Lee,H. Chang,S. Choi,W. Choi,Y.-K. Park,이철위 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
Cobalt promoted Mo/b (Beta zeolite) catalysts were prepared with different metallic loadings (0.5–1.5)by a co-impregnation method. The catalytic activities of the synthesized catalysts were investigated forthe selective hydrocracking of tetralin and pyrolysis fuel oil (PFO) into mono-aromatic hydrocarbons(MAH) such as benzene, toluene and xylene (BTX) in afixed-bed reactor system. Prior to using theCoMo/b catalyst for crude PFO hydrocracking, different reaction parameters (including metallic loading,temperature, H2 pressure, and LHSV) were investigated for the hydrocracking of a model feed, tetralin, todetermine the best conditions for maximum BTX yield. The CoMo(0.5)/b catalyst with a Co/Mo ratio of0.5 produced the highest MAH yield of 62.6% at 99.5% conversion of tetralin, continuously for 140 h ofreaction time without any deactivation. Furthermore, the CoMo(0.5)/b catalyst was found to be superioramong the tested CoMo/b catalysts for hydrocracking real feed PFO, and it produced a maximum MAHyield of 54.8% at 99.1% conversion of PFO. The synthesized catalysts were characterized using differentcharacterization techniques, including BET, NH3-TPD, SEM-EDS and ICP, to evaluate their physiochemicalproperties and determine the active sites present in the catalysts.
Silver decorated PEDOT:PSS wrapped MnO2 nanowires for electrochemical supercapacitor applications
Dipali S. Patil,Sachin A. Pawar,신재철 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-
This paper reports the facile preparation of silver (Ag)-decorated, PEDOT:PSS-wrapped MnO2 nanowire ternary electrode materials for supercapacitor applications. Surface morphology of Ag–PEDOT:PSS–MnO2 material revealed the presence of Ag nanoparticles onto PEDOT:PSS wrapped MnO2 nanowires. This reduces the charge transfer resistance and improves charge transportation between the current collector and active material. The Ag–PEDOT:PSS–MnO2 electrode exhibited enhanced specific capacitance (838 Fg−1), energy density (0.486 kWh kg−1), and capacitance retention (86.8%). In addition, Ag–PEDOT:PSS–MnO2-based symmetric supercapacitor device exhibited ideal capacitive behavior. This study revealed a facile way to improve the electrochemical activity of MnO2 that can also be adopted for other metal oxides.
Dipali P. Upare,박영선,M. S. Kim,J. Kim,D. Lee,J. Lee,H. Chang,W. Choi,S. Choi,Y.-P. Jeon,Y.-K. Park,이철위 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-
The Mo/b (beta zeolite) catalyst was prepared by wet-impregnation and modified with cobalt promoter. The catalytic activity of monometallic Mo/b catalyst in selective hydrocracking of tetralin intomonocyclic aromatic hydrocarbons (MAH) such as benzene, toluene and xylene (BTX) was investigatedin fixed bed reactor and compared its activity with bimetallic CoMo/b catalyst. The catalytic resultsindicates that, incorporation of promoter (Co) not only improved their catalytic activity in hydrocrackingreactions but also showed long term stability as compared with Mo/b. Effect of different SiO2/Al2O3 ratio(25, 75, 150) in beta zeolite was investigated on catalytic activity of CoMo/b. CoMo/b with SiO2/Al2O3 of25, gave highest 62.6% of desired MAH yield at 99.5% conversion of tetralin for more than 140 h ofreaction time. Likely, CoMo/b catalyst was also found to be effective for the conversion of pyrolysis fueloil (PFO) into MAH. Crude PFO was distilled out at 170 8C and total amount of 55 wt.% PFO was receivedafter distillation. In the PFO hydrocracking, it produced 43.3% of MAH product yield at 70% conversion ofPFO, which is significantly higher than the conversion (48%) and MAH yield (34.2%) obtained frommonometallic Mo/b catalysts. CoMo/b catalyst was found to be more stable as well as active for longerreaction time (140 h).
MnO2-Graphene Oxide-PEDOT:PSS Nanocomposite for an Electrochemical Supercapacitor
Dipali S. Patil,Sachin A. Pawar,신재철,김효진 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.8
A ternary nanocomposite with poly (3,4 ethylene dioxythiophene:poly(styrene sulfonate) (PEDOT:PSS)-MnO2 nanowires-graphene oxide (PMn-GO) was synthesized by using simple chemical route. The formation of the nanocomposite was analyzed by using X-ray diffraction and X-ray photoelectron spectroscopy. Field-emission scanning microscopy (FESEM) revealed the formation of MnO2 nanowires and graphene oxide nanosheets. The highest specific capacitance (areal capacitance) of 841 Fg −1 (177 mFcm −2) at 10 mVs −1 and energy density of 0.593 kWhkg −1 at 0.5 mA were observed for PMn-GO, indicating a constructive synergistic effect of PEDOT:PSS, MnO2 nanowires and graphene oxide. The achieved promising electrochemical characteristics showed that this ternary nanocomposite is a good alternative as an electrode material for supercapacitor.
Dipali S. Patil,Aviraj M. Teli,최원준,Sachin A. Pawar,신재철,김효진 한국물리학회 2020 Current Applied Physics Vol.20 No.12
Recently, spinel-type binary metal oxides have attracted enormous interest in energy storage devices. In supercapacitors improving energy density is still challenging task and the composite nanostructures are found to address this issue in some extent. Herein, a composite nanostructure based on ZnCo2O4/CdS was synthesized on nickel foam using hydrothermal and successive ionic layer adsorption and reaction (SILAR) methods. A hydrothermally synthesized ZnCo2O4 nanoflowers were coated by CdS nanoparticles by varying SILAR cycles and studied its electrochemical performance. The ZnCo2O4/CdS nanostructured electrode with optimized four SILAR cycles of CdS coating exhibited a high areal capacity, energy density and power density of 2658 mCcm 2, 517 μWhcm 2 and 17.5 mWcm 2 at 25 mA, which is higher than pristine ZnCo2O4. This work show ZnCo2O4/CdS nanostructure is a favorable electrode for supercapacitors.
Nano-structured porous carbon materials for catalysis and energy storage
Dipali Prvine Upare,이철위,Songhun Yoon 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.3
Porous carbon materials are of interest in many applications because of their high surface area and physicochemical properties. For particular application, the surface of porous carbon material usually needs to be modified or functionalized according to a specific requirement. In this review, methods of synthesis of porous carbon material core shell structure, methods of functionalizing porous carbon material through direct incorporation of heteroatom in carbon synthesis, halogenation, sulfonation, surface oxidation, grafting are examined. The method of characterizing the functionalized carbon material (bulk, surface, internal and external) and its application in the field of catalysis and energy storage (Li-ion batteries, capacitors/supercapacitors), are also subjects of focus.