Facile synthesis of N-MgSb2O6 trirutile antimonate and its enhanced photocatalytic performance. Issue 19 (30th December 2022)

• Record Type: Journal Article
• Authors: Nagarajan, Arunkumar; Naraginti, Saraschandra
• Is Part Of: International journal of environmental analytical chemistry. Volume 102:Issue 19(2022)
• Page Start: 7938
• Page End: 7952
• Publication Date: 2022-12-30
• Subjects: Metal oxide -- optical properties -- Raman spectroscopy -- degradation -- p-bromophenol; Ecology -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental chemistry -- Periodicals; Pollution -- Periodicals; 577.14
• DOI: 10.1080/03067319.2020.1842389
• Languages: English
• ISSNs: 0306-7319

Abstract

ABSTRACT: In this study, nanocrystallinetrirutile N-doped MgSb2 O6 was prepared by a facile solution combustion method and its photocatalytic activity was reported for the first time. Products obtained with different oxidant to fuel ratios (O/F) were in crystalline single phasic N-doped MgSb2 O6 confirmed by X-ray diffraction. The prepared powders were well characterised by using scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy. Raman spectra showed all the characteristic peaks of trirutile structure with significant shift and broadening in the nanocrystalline product compared to that of microcrystalline product. UV-visible DRS analysis confirmed the decrease in band gap with an increase in O/F which is in the range of 4.05 eV–3.30 eV. Nearly 96% of p -bromophenol degradation ( p -BP, 10 mg/L) was achieved over nanocrystalline N-doped MgSb2 O6 after 60 min of irradiation at a rate of 0.069 min −1 . Furthermore, radical quantification experiments and electron spin resonance (ESR) analysis revealed that OH and O2 − were the main ROS responsible for photodegradation of p -BP. Hence, this study presented the enhanced photocatalytic activity of combustion synthesised nanocrystalline N-doped MgSb2 O6 for the first time and its activity was found to be correlated with N-doping, cation ordering, particle size, and crystallinity.