Exploring novel synthesis techniques, optical characteristics, and laser constraints of double metal phosphates MNiPO4 (M = Mn, Cu) based on structural analysis

Abstract

Recently, double metal phosphate compounds have become a research hotspot to explore new materials that could be utilized in different fields of applications. In our paper, two novel materials MNiPO₄ (M = Mn, Cu) have been fabricated by microwave-assisted method. The structural and morphology features have been investigated using FTIR, XRD, HRTEM, and BET techniques. FTIR results showed different peaks in the spectra that are attributed to the vibrational modes of the phosphate groups, metal–oxygen bonds, and hydroxyl groups. The pore size distribution analysis shows that MnNiPO₄ and CuNiPO₄ have a narrow pore size distribution with a mean pore diameter of around 2.22 and 22.5 nm, respectively. The absorbance spectra of MnNiPO₄ and CuNiPO₄ exhibit a peak at around 500 nm, indicating maximum absorption at this wavelength. Similarly, the optical laser limiting measurement shows that MnNiPO₄ is a more effective candidate for applications requiring high laser limiting performance, particularly where higher-power lasers are involved. The present results support the use of MnNiPO₄, exploiting certain inexpensive bimetal phosphates as operational components in advanced optoelectronic applications.