A study on the effect of reaction temperature on the synthesis of magnesium hydroxide nanoparticles: Comparative evaluation of microstructure parameters and optical properties

In the present work, magnesium hydroxide nanoparticles were synthesized using the coprecipitation method with the variation of the reaction temperature. The effects of variation of the reaction temperature on the morphological and optical properties were discussed in this paper. The synthesized NPs were characterized using X-ray diffraction, Scanning electron microscope with energy dispersive X-ray spectroscopy, Fourier transform infrared spectrometer, UV–visible absorption, and fluorescence techniques. The crystallite size of the NPs was estimated using various theoretical methods such as Debye-Scherrer (DS), Williamson-Hall (WH), size-strain plot (SSP), and Halder-Wagner (HW) methods and noticed that all the methods have yielded nearly same crystallite size, which ranges between 10 -12 nm for MH A and 7–8 nm for MH B NPs, respectively. The synthesized NPs have shown the shape of flakes and agglomerated particle distribution. These NPs have also shown broad absorption and narrower emission band in the visible region, which suggests that these have potential applications in the field of biological markers, sensors and light-harvesting devices.