000			03249cam a2200349 a 4500
003			EG-GiCUC
005			20250223032718.0
008			210322s2020 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.24.05.M.Sc.2020.Ra.M
100	0		_aRana Ashraf Elsayed Essa
245	1	0	_aMicrowave-assisted synthesis of Silicon/Carbon nanocomposites as thermal and electrical capacitors / _cRana Ashraf Elsayed Essa ; Supervised Yasser Attia Attia , Shymaa Samir Mohamed Medany ,Yasser Mahmoud Ali Mohamed
246	1	5	_aتحضير متراكبات السيليكون / كربون النانوية بمساعدة الميكروويف كمكثفات حرارية وكهربائية
260			_aCairo : _bRana Ashraf Elsayed Essa , _c2020
300			_a193 P. : _bcharts , facsimiles ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - National Institute of Laser Enhanced Sciences (NILES) - Department of Laser applications in Enviromental Merology Photochemistry and Photobiology and Agriculture
520			_aIn this study, we evaluate the effectiveness of silicon/carbon nanocomposites as thermal and electrical capacitors. Silicon/RGO and Silicon/GO nanocomposites were prepared by using a simple microwave-assisted method for the hybridization of reduced graphene oxide and graphene oxide with trimethylsilyl chloride (TMSCl) and tert-butyl diphenylsilyl chloride (TDPSCl).The assynthesized silicon-functionalized reduced graphene oxide (RGO) and graphene oxide (GO) materials (TMS/RGO, TDPS/RGO, TMS/GO and TDPS/GO) were characterized using spectroscopic techniques to show the anchoring of silicon on the sheets of the reduced graphene oxide and graphene oxide.The structures of these materials comprised of nanosheet of carbon attached to hydroxyl, carboxylic and epoxy functional groups. One way of increasing the thermal conductivity of these materials is improving VI thermal stability, decreasing the surface energy, and increasing the chemical stability that offer a good hydrophobic surface due to the action of TMS and TDPS as protecting agents that will enhance the crystallinity and chain alignment and thereby facilitate the movement of heat-conducting phonons.Therefore, we sought in this study to functionalize the RGO and GO surfaces with silicon with [C-O-SiR3, C-COOSiR3, C(OSiR3)-C(OSiR3)] functional groups.TEM was used to show the morphology of the particles which were further analyzed using XRD, FTIR, and DRS. The thermal capacitance was evaluated using TGA and DSC. While GO and RGO have volumetric capacities of 2653.22 oV.s/mg and 89.7 oV.s/mg respectively, RGO/TDPS showed a capacity of 5507.85 oV.s/mg and RGO/TMS showed an even higher capacity of 7473.03 oV.s/mg.
530			_aIssued also as CD
653		4	_aGraphene oxide
653		4	_aReduced graphene oxide
653		4	_aSilicon/graphene oxide hybrids
700	0		_aShymaa Samir Mohamed Medany , _eSupervisor
700	0		_aYasser Attia Attia , _eSupervisor
700	0		_aYasser Mahmoud Ali Mohamed , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c80335 _d80335