Abstract
Pure ZnO and Cr-doped ZnO nanoparticles have been synthesized via a facile chemical co-precipitation route and their structural, thermal characteristics were discussed systematically. In the experimental producer, the doping concentration has varied the range, 0.05–0.1 M, while calcined at 600 °C. The influence of Cr-doping on the physical characteristics of ZnO nanoparticles was investigated and addressed. As-prepared samples were analyzed via XRD, FTIR, TGA/DTA, BET, and ICP-MS. XRD analysis shows that ZnO and Cr doped ZnO nanoparticles with average particle sizes between 23 and 39 nm were successfully developed with hexagonal wurtzite structure. The FTIR spectroscopy analysis confirms the existence of chromium in the doped ZnO nanoparticles and the formation of ZnO. The TGA/DTA analysis shows that Cr–ZnO nanoparticles are more thermally stable than ZnO nanoparticles. Moreover, the dopant concentration has been analyzed via ICP-MS and showed a good agreement with the expected chromium concentration. The BET surface area measurement shows that 176.25 m2/g and 287.17 m2/g for un-doped ZnO, and 0.1 M Cr-doped ZnO nanoparticles, respectively. Hence, doping of Cr enhances the surface area and thermal stability. Thus, Cr–ZnO nanoparticles show good thermal stability, and high surface area, which is an excellent characteristices of nanomaterials.Graphic abstract
Highlights
Nanoscale materials have revealed advanced occasions for several technological utilization [1,2,3]
For synthesis of Cr-doped ZnO NPs, 2.5 g of zinc nitrate hexahydrate was dissolved in 80 ml deionized water and (0.05, 0.075, and 0.1 M) amount chromium acetate tetrahydrate dissolved in 100 ml was added to the above solution. 20 mL of 2 M NaOH solution was slowly added into the starting materials under vigorous stirring until pH of the solution become 12
ZnO and chromium doped zinc oxide (Cr–ZnO) nanoparticles were developed via a simple chemical co-precipitation route by changing the doping concentration in the range 0.05–0.1 M, which is further calcined at 600 °C
Summary
Nanoscale materials have revealed advanced occasions for several technological utilization [1,2,3] Because of their unique, optical, catalytic, electrical, and magnetic characteristics and enhanced physical characteristics such as thermal, or chemical and mechanical, metal oxide nanoparticles are widely employed for many applications like magnetic materials, cosmetics, batteries, pharmaceuticals, catalysts, optical devices, protective coatings structured materials, and biomaterials [4,5,6,7]. ZnO can be obtained in different crystallized forms such as rock salt, zincblende, and wurtzite with a corresponding cubic, cubic, and hexagonal structure, respectively. In terms of metal doping with different concentrations, the structure, morphology, and optical properties of ZnO nanocrystals were studied.
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