Effect of Molar Ratio on Structural and Size of ZnO/C Nanocomposite Synthesized Using a Colloidal Method at Low Temperature

Siham Lhimr (Department of Chemistry, Mohammed V University, 4 Avenue Ibn Battouta, BP 1014 RP, Rabat 10000, Morocco)
Saidati Bouhlassa (Department of Chemistry, Mohammed V University, 4 Avenue Ibn Battouta, BP 1014 RP, Rabat 10000, Morocco)
Bouchaib Ammary (Department of Chemistry, Mohammed V University, 4 Avenue Ibn Battouta, BP 1014 RP, Rabat 10000, Morocco)

Indonesian Journal of Chemistry
Vol 19, No 2 (2019)

In this paper we study the effects of different molar ratio R of Zn2+ to OH– (R= nOH–/nZn(II) of the precursor was investigated by varying the amount of NaOH. Samples have been synthesized by the colloidal method at room temperature using (ZnCl2), citric acid (C6H8O9·H2O) and sodium hydroxide (NaOH). The formation of ZnO/C composite was characterized by The X-ray diffraction patterns indicated a high crystallinity and nanocrystalline size of ZnO with hexagonal wurtzite structure. The morphologies of the particles have been studied with a scanning electronic microscopy (SEM). The existence of carbon into the composite was detected by FTIR and EDS. The optical band gap of various ZnO/C composite was calculated from UV-Visible absorption measurement varied in the range 3.301 to 3.282 eV according to R values.