اﺛﺮ ﺷﺮاﯾﻂ ﺳﺎﺧﺖ ﺑﺮ ﺳﺎﺧﺘﺎر ﺑﻠﻮري و ﻣﻮرﻓﻮﻟﻮژي ﻧﺎﻧﻮﺳﺎﺧﺘﺎرﻫﺎي ﻫﯿﺒﺮﯾﺪي ﻧﺎﻧﻮﻟﻮﻟﻪ ﮐﺮﺑﻨﯽ- اﮐﺴﯿﺪ روي

The Effect of Synthesis Parameters on Crystal Structure and Morphology of CNT-ZnO Hybrid Nanostructures

در اﯾﻦ ﭘﮋوﻫﺶ ﻧﺎﻧﻮﻣﻮاد ﻫﯿﺒﺮﯾﺪي ﻧﺎﻧﻮﻟﻮﻟﻪ ﮐﺮﺑﻨﯽ ﭼﻨﺪدﯾﻮاره - اﮐﺴﯿﺪ روي (MWCNT-ZnO) ﺑﻪ روش ﺳﻞژل ﭘﻠﯽﯾﻮﻟﯽ ﺑﺎ اﺳﺘﻔﺎده از اﺳﺘﺎت روي دوآﺑﻪ (Zn(CH3COO)2,2H2O) و ﻧﺎﻧﻮﻟﻮﻟﻪ ﮐﺮﺑﻨﯽ ﻋﺎﻣﻠﺪار ﺑﺎ ﮔﺮوه ﮐﺮﺑﻮﮐﺴﯿﻞ (COOH) و دو ﻧﻮع ﺣﻼل دي اﺗﯿﻠﻦ ﮔﻠﯿﮑﻮل و ﮔﻠﯿﺴﯿﺮﯾﻦ ﺳﺎﺧﺘﻪ و ﺗﺎﺛﯿﺮ ﺳﻪ ﭘﺎراﻣﺘﺮ ﻧﻮع ﺣﻼل، pH ﻣﺤﯿﻂ و ﻣﯿﺰان آب اﻓﺰودﻧﯽ ﺑﺮ ﺳﺎﺧﺘﺎر ﺑﻠﻮري و ﻣﻮرﻓﻮﻟﻮژي ﻣﺤﺼﻮل ﻧﻬﺎﯾﯽ ﺑﺮرﺳﯽ ﺷﺪ. ﺗﻤﺎﻣﯽ ﻧﺎﻧﻮ ﻣﻮاد ﺗﻬﯿﻪ ﺷﺪه ﺑﻪوﺳﯿﻠﻪ آﻧﺎﻟﯿﺰﻫﺎي ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ روﺑﺸﯽ ﮔﺴﯿﻞ ﻣﯿﺪاﻧﯽ (FESEM)، ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ ﻋﺒﻮري (TEM)، ﻃﯿﻒﺳﻨﺠﯽ ﺗﺒﺪﯾﻞ ﻓﻮرﯾﻪ ﻓﺮوﺳﺮخ (FTIR)، ﻃﯿﻒﺳﻨﺠﯽ ﭘﺎﺷﻨﺪﮔﯽ ﭘﺮﺗﻮ اﯾﮑﺲ (EDX) و ﭘﺮاش ﭘﺮﺗﻮ اﯾﮑﺲ (XRD) ﻣﺸﺨﺼﻪﯾﺎﺑﯽ ﺷﺪﻧﺪ. در ﺳﺎﺧﺖ MWCNT-ZnO ﺑﺎ اﺳﺘﻔﺎده از ﺣﻼل دي اﺗﯿﻠﻦ ﮔﻠﯿﮑﻮل ﻣﺸﺎﻫﺪه ﺷﺪ ﮐﻪ ﺑﺎ اﻓﺰاﯾﺶ pH ﻣﺤﻠﻮل، اﻧﺪازه ﻧﺎﻧﻮذرات اﮐﺴﯿﺪ روي ﭘﻮﺷﺶ داده ﺷﺪه روي ﺳﻄﺢ ﻧﺎﻧﻮﻟﻮﻟﻪ ﮐﺮﺑﻨﯽ در ﺳﺎﺧﺘﺎرﻫﺎي ﻫﯿﺒﺮﯾﺪي ﺑﺸﺪت ﮐﺎﻫﺶ و ﺗﻌﺪاد آنﻫﺎ اﻓﺰاﯾﺶ ﻣﯽﯾﺎﺑﺪ و ﭘﻮﺷﺶ ﯾﮑﻨﻮاﺧﺖﺗﺮي اﯾﺠﺎد ﻣﯽﺷﻮد. ﺑﺎ ﺗﻐﯿﯿﺮ ﺣﻼل و اﺳﺘﻔﺎده از ﮔﻠﯿﺴﯿﺮﯾﻦ در ﺳﺎﺧﺖ ﻫﯿﺒﺮﯾﺪ، ﻣﻮرﻓﻮﻟﻮژي ﺟﺪﯾﺪي ﺷﮑﻞ ﮔﺮﻓﺘﻪ و اﮐﺴﯿﺪ روي ﺑﺼﻮرت ﻧﺎﻧﻮﺑﻠﻮرﻫﺎي ﺗﺎﺣﺪودي ﺷﺶﺿﻠﻌﯽ ﺑﻪ ﺑﺪﻧﻪ ﻧﺎﻧﻮﻟﻮﻟﻪﻫﺎي ﮐﺮﺑﻨﯽ ﻣﺘﺼﻞ ﻣﯽﺷﻮد. ﺑﺎ اﻓﺰاﯾﺶ ﻣﯿﺰان آب دﯾﻮﻧﯿﺰه ﺣﺎﺿﺮ در واﮐﻨﺶ، ﻓﺮآﯾﻨﺪ ﻫﯿﺪروﻟﯿﺰ اﻓﺰاﯾﺶ ﯾﺎﻓﺘﻪ و اﮐﺴﯿﺪ روي ﺑﯿﺸﺘﺮي روي ﻧﺎﻧﻮﻟﻮﻟﻪﻫﺎ ﻧﺸﺴﺖ ﻣﯽﮐﻨﺪ

In this research, Multiwall Carbon nanotubes -Zinc oxide(MWCNT-ZnO) hybrid nanomaterial was prepared by a polyol sol-gel method using zinc acetate (Zn(CH3COO)2.2H2O), functionalized CNT with carboxyl (COOH) group and two kind of solvent; diethylene glycol (DEG) and glycerol (GLY) and the effect of three synthesis parameter: kind of solvent, pH of solution and amount of additive water on morphology and crystal structure of end-product hybrid was investigated. The synthesized nanomaterials were characterized by field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), energy dispersive X ray spectroscopy (EDX) and X ray diffraction (XRD). In synthesis of hybrid structures using diethylene glycol, it was found that by increasing the pH of solution, the average size of ZnO nanoparticles deposited on CNT surfaces dramatically decreases and the number of them increases. Furthermore by increasing the pH of solution the uniformity of ZnO deposition was considerably improved. By changing the solvent and using glycerol a new morphology of hybrid structure was obtained and zinc oxide in form of hexagonal nanocrystal segments attached to the body of CNTs. By increasing the amount of deionized water, hydrolysis reaction and thus deposition of ZnO on CNTs’ body increases.