Synthesis and characterization of ZnO nanoparticles

Abstract

Zinc oxide (ZnO) nanoparticles (NPs) has been synthesized by precipitation method using ammonia as precipitating agent and ZnCl 2 . 4 H 2 O as starting material. Syntsesised nanoparticles (NPs) have been characterized by using XRD (X-ray diffraction), TGA/DTA (Thermo Gravimetric Analysis), IR (Infrared Spectroscopy), magnetic measurement, surface area measurement, SEM(Scanning electron microscopy) and TEM (Transmission electron microscopy). XRD studies show that zinc oxide was formed as ZnO and it has hexagonal structure. Magnetic measurements showed diamagnetic nature of synthesized zinc oxide NPs. Surface area of NPs zinc oxide was 4.3737 m 2 /g. The particle size of the synthesized zinc oxide was determined by TEM. TEM images show that the size of particles of ZnO varied from 27nm to 82nm with average crystallite size 50 nm.

Metal oxide QD based ultrasensitive microsphere fluorescent sensor for copper, chromium and iron ions in water

“…The water-soluble uorescent ZnO-QDs capped by APTES were prepared following the protocol of Dibakar et al 36,37 Initially, 1% (w/v) carboxymethyl cellulose solution was prepared by dissolving carboxymethyl cellulose powder in double distilled water under stirring at 1500 rpm for 12 h. The uorescent zinc oxide quantum dot capped with APTES (0.5 mg dry weight) were solubilised in 500 mL of double distilled water by ultrasonication for 30 min and added into 5 mL of carboxymethyl cellulose solution followed by incubation under stirring (1500 rpm) for 5 h at 30 C. Now uorescent zinc oxide quantum dotcarboxymethyl cellulose microsphere (ZCM) was prepared by water-in oil emulsion method. The ZCM solution was then added dropwise ($1 mL min À1 ) into 25 mL of light liquid paraffin containing 100 mL of Tween-80 under stirring at 1800 rpm to form water-in-oil emulsion.…”

Influence of pH Variation on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles Synthesized by Auto Combustion Method

“…Soft ferrite powder have attracted the researchers and investigators of different fields due to their numerous applications like memory system, medical science instrument etc [2][3][4][5][6][7] .…”

Effect of Sn Doping on Structural Properties of Cobalt Oxide Nanoparticles Synthesized by Sol Gel Method.

“…Nanostructures can contributes to stronger ,lighter and smarter surfaces systems [1,2].Cobalt oxide (Co3O4)is a well known ptype semiconducting metal of its application in various fields of research.Co3O4 nanoparticles were synthesized by various method like sol gel method, surfactantmediated synthesis ,thermal decomposition, polymer matrix assisted synthesis and spray pyrolysis [3,4].in recent days ,the fine nanoparticles of cobalt oxide nanoparticles and their application in the fields such as pigments ,magnetic materials ,gas sensor ,Li-batteries , high temperature solar selective absorber, catalysis and electrochemical and optical depending upon the size, structure, shape and phase homogeneity and with surface morphologies [5,6,7,8,9]. Metal oxide gas sensor have been widely used in the portable gas detection system because of their advantages such as low cost, compact size and simple measuring electronics [10].such sensor is significantly influenced by the morphology and structure of sensing materials.…”