[01] Rasha Adam Shommein, Department of Appropriate Technology and Urban Development, Institute of Engineering Research & Materials Technology, National Centre for Research, Khartoum, Sudan. [02] Suhair Kamaleldin Shomeina, Department of Chemicals and Cellulose, Institute of Engineering Research & Materials Technology, National Centre for Research, Khartoum, Sudan. [03] Omer Nur, Department of Physics and Technology, Linköping University, Linköping, Sweden. [04] Mustafa Abbas Mustafa, Materials and Nanotechnology Research Centre, University of Khartoum, Khartoum, Sudan.

Nanotechnology is one of the new methods technologies, which can use bottom- up approach with low temperature chemical growth to synthesize nanomaterial particle. There are diverse aspects of the preparation and characterization of nanoscopic ZnO, and composite ZnO/TiO₂ materials. In this study, ZnO NPs were prepared by hydrothermal method, using 1: 1.5 ratio of Zinc acetate diyhdrate to Sodium hydroxide. Then prepared ZnO NPs were used with commercial rutile TiO₂ NPs a mean diameter about 40 nm, to prepare composite ZnO/TiO₂ NPs with ratio 1: 3, which were successfully synthesized by modified hydrothermal method. Different techniques used to investigate the crystal structure, morphology, the chemical composition, UV-visible, and energy band gap of NPs. The XRD confirms that the formation of rutile TiO₂ and zincite ZnO NPs phases in the composite structure; the observation shows according to SEM images, ZnO NPs have hexagonal shapes; TiO₂ NPs have a tetragonal shape, and ZnO/TiO₂ composite present as cubic NPs shape. Also the (EDS) observation shows availability of ZnO, TiO₂ and composite ZnO/TiO₂ NPs in the sample; and UV-visible light confirms the wavelength range and band gap energy of ZnO, TiO₂ and composite ZnO/TiO₂ NPs.

Nanoparticles (NPs), Titanium Oxide (TiO₂), Zinc Oxide (ZnO), Composite (ZnO/TiO₂), X-Rays Diffraction (XRD), Characterization

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