Synthesis of Nanocrystalline MgO Particles by Combustion Followed by Annealing Method Using Hexamine as a Fuel

Abstract

In this work, nanocrystalline MgO particles were prepared through combustion method using magnesium nitrate as oxidizer and hexamine as a fuel. The materials obtained by combustion method were subsequently annealed at 800 ∘ C for 3 h to improve the crystallinity and phase purity. The obtained MgO nanomaterials were characterized by powder X-ray diffraction analysis (XRD), infrared (IR) spectroscopy, photoluminescence (PL), near-infrared (NIR) spectroscopy, and scanning electron microscopy (SEM). The cubic crystal structure with lattice parameter, a = 0.4210(4) nm with average crystalline size of 22 nm, is obtained for the nano-MgO particles. The PL emission spectrum of nanocrystalline MgO materials exhibits three emission peaks at 432, 465, and 495 nm which are due to various structural defects. The SEM results expose the fact that the MgO nanomaterials are seemingly porous and highly agglomerated with fine particles. Owing to the higher reflectance of prepared nanocrystalline MgO, it can be used as NIR reflective pigments. The present results prove that the combustion technique using hexamine can produce the materials with high crystallinity. To the best of our knowledge, this is the first report on the synthesis of nanocrystalline MgO materials by combustion method using hexamine as a fuel.

Utilization of bare MgO, CeO2, and ZnO nanoparticles for nitrate removal from aqueous solution

“…From Figure 2, it can be observed that the Bragg reflections such as (111), (002), (202), (113), and (222) are seen in the 2h range between 108 and 908. This present value is in good accordance with the literature reports about MgO NPs [27]. The All reflections are sharp with slight broadening.…”

“…The bands at 674 cm −1 was assigned to Mg‐O vibration in the MgO, Ce‐O, and Zn‐O vibrations were observed at 456 cm −1 , and 547 cm −1 in the spectra, respectively. The FT‐IR absorption peak seen at the wavenumber 1468 cm −1 is assigned to the asymmetric stretching of the carbonate ion, species .The BET of NPs were determined using the Brunauer–Emmett–Teller (BET) method which listed in Table .…”

Magnesium Oxide in Nanodimension: Model for MRI and Multimodal Therapy

“…The observed peaks were [40][41][42][43][44]. The peaks at 482 cm −1 and 533 cm −1 are associated to longitudinal optical phonon bands in MgO lattice [40,45].…”

Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite

“…The spectrum clearly shows sub peaks at 432, 465, and 495nm. 43 Note that luminescence given in Figure 8 is excitation wavelength-dependent. Figure 8b is generated by excitation at 395 nm, whereas 8a is generated by excitation at 290 nm.…”