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Pseudocapacitive Characteristics of Mg Doped ZnO Nanospheres Prepared by Coprecipitation

Arul S., Senthilnathan T., Jeevanantham V., Satheesh Kumar K. V.

Archives of Metallurgy and Materials

2021

Vol. 66, iss. 4

1141--1148

A n-type semiconductor ZnO has high transmittance features, excellent chemical stability and electrical properties. It is also commonly used in a range of fields, such as gas sensors, photocatalysts, optoelectronics, and solar photocell. Magnesium-doped zinc oxide (Mg-ZnO) nano powders were effectively produced using a basic chemical precipitation process at 45°C. Calcined Mg-ZnO nano powders have been characterized by FTIR, XrD, SEM-EDX and Pl studies. XRD measurements from Mg-ZnO revealed development of a crystalline structure with an average particle size of 85 nm and SEM analysis confirmed the spherical morphology. Electrochemical property of produced Mg-ZnO nanoparticles was analyzed and the specific capacitance value of 729 F g-1 at 0.5 A g-1 current density was recorded and retained a specific capacitance ~100 percent at 2 A g-1 current density.

Preparation and photocatalytic activity of multi-walled carbon nanotubes/Mg-doped ZnO nanohybrids

Chen C. S., Xie X. D., Cao S. Y., Liu T. G., Lin L. W., Chen X. H., Liu Q. C., Kuang J. C., Xiao Y.

Materials Science Poland

2015

Vol. 33, No. 3

460--469

Multi-walled carbon nanotubes/Mg-doped ZnO (MWNTs/Zn1-xMgxO) nanohybrids were prepared by co-precipitation method, and their photocatalytic activity for methyl orange (MO) was studied. Experimental results showed that Mg-doped ZnO nanoparticles were successfully deposited on the surface of MWNTs under annealing at 450 degrees C and 550 degrees C. The resultant MWNTs/Zn0.9Mg0.1O nanohybrids had better photocatalytic activity for degradation of methyl orange than pure ZnO: the rates of MO photodegradation were 100 % and 30 % for 1 h, respectively. The enhancement in the photocatalytic activity was attributed to the excellent electronic properties of MWNTs and Mg-doping.