SOLIDSTATE RELAY INRUSH CURRENT LIMITER WITH OVER VOLTAGE AND UNDER VOLTAGE PROTECTION FOR SMALL LOADS

Author (s) : Dr.M.SHANMUGAM and Mrs.K.JAYANTH

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Abstract :
Hexagonal phase zinc oxide (ZnO) nanostructures were synthesized via hydrothermal method and annealed at different temperatures viz., 200, 400, 600, 800 and 1000 C. The prepared nanostructures were characterized by XRD, FTIR, FESEM, HR-TEM, UV-DRS and XPS techniques. The crystallite sizes of the prepared nano materails were calculated by Williamson-Hall plots method. The ZnO annealed at 200 C showed a crystallite size of 18.7 nm while the ZnO annealed at C showed a 46.2 nm. It is observed that when increasing the annealing temperature the crystallite sizes were increased due to induced growth of crystallites during annealing process. Moreover, the band gaps of the ZnO annealed at different temperatures showed a decreasing trend with increasing annealing temperatures. The photocatalytic performances were studied by analyzing the degradation of methylene blue in an aqueous solution. ZnO annealed at 1000 C exhibited better photocatalytic activity (94%) due to enhanced crystallinity, comparatively lower bandgap and high oxygen vacancy.

Keywords : XRD, FTIR, FESEM, HR-TEM, UV-DRS

Conference Date : 17/09/2021

Pages : 137

Paper ID : IESMDT135