Selenium is a trace and essential micronutrient for the health of human, animals, and microorganisms. Recently, selenium nanoparticles (SeNPs) attracted many researchers’ interest due to their biocompatibility, bioavailability, and low...

Here we report synthesis and characterization of chemically synthesized calcium hydroxide (Ca(OH)2) with and without deliberate presence of NaNO3 as an impurity. Calcium nitrate tetrahydrate (Ca(NO3)2.4H2O) is used as precursor and alkaline NaOH solution is used as precipitant to synthesize the Ca(OH)2 samples. The samples were characterized by XRD, FESEM, FTIR spectroscopy, DTA, TGA and UV-Vis spectroscopy techniques. From the UV-Vis spectroscopy results, it is found that the Ca(OH)2 with NaNO3 impurity has higher bandgap than the sample without NaNO3. The weight loss in TGA is also more for the Ca(OH)2 with impurity than the one for without impurity. The results are discussed in terms of composition formed during synthesis process.

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With increasing interests in transition metal dichalcogenides (TMDs), immense literature has come into existence covering broad range of preparation methods as well as applications in diverse fields. Often dichalcogenides include...