Sonochemical synthesis of porous NiTiO3 nanorods for photocatalytic degradation of ceftiofur sodium

Abstract

Porous NiTiO nanorods were synthesized through the sonochemical route followed by calcination at various temperature conditions. Surface morphology of the samples was tuned by varying the heat treatment temperature from 100 to 600°C. The synthesized NiTiO nanorods were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, diffused reflectance spectroscopy, photoluminescence spectroscopy and Brunauer-Emmett-Teller (BET) analyses. The characterization studies revealed that the NiTiO nanomaterial was tuned to porous and perfectly rod shaped structure during the heat treatment at 600°C. The porous NiTiO nanorods showed visible optical response and thus can be utilized in the photocatalytic degradation of ceftiofur sodium (CFS) under direct sunlight. The photoluminescence intensity of the porous NiTiO nanorods formed while heating at 600°C was lower than that of the as-synthesized NiTiO sample owing to the photogenerated electrons delocalization along the one dimensional nanorods and this delocalization resulted in the reduction of the electron-hole recombination rate. The photocatalytic degradation of ceftiofur sodium (CFS) was carried out using NiTiO nanorods under the direct sunlight irradiation and their intermediate products were analysed through HPLC to deduce the possible degradation mechanism. The porous NiTiO nanorods exhibited an excellent photocatalytic activity towards the CFS degradation and further, the photocatalytic activity was increased by the addition of peroxomonosulfate owing to the simultaneous generation of both OH and SO.

Photocatalytic activity of MnTiO3 perovskite nanodiscs for the removal of organic pollutants

“…Perovskite oxides delivered excellent structural stability and flexibility to accommodate a wide range of cations with different oxidation states, which guided them for excellent catalytic activity and consequently for applications in photocatalysis [ 17 , 18 , 19 , 20 , 21 ]. Various research groups have explored the photocatalytic dye degradation activities of the perovskite materials such as ZnTiO 3 , SrTiO 3 , BaTiO 3 , NiTiO 3 , CoTiO 3 , and MnTiO 3 , respectively [ 20 , 22 , 23 , 24 , 25 , 26 ]. Ali et al.…”

Metal Titanate (ATiO3, A: Ni, Co, Mg, Zn) Nanorods for Toluene Photooxidation under LED Illumination

“…Two emission peaks centered at 418 and 480 nm are observed also in the PL spectrum of NiTiO3 and the emission peak at 480 nm is the main peak in the PL spectrum of CoTiO3 [74,75]. This might be due to the increase in the crystallites with aspect ratio of the perovskite nanorods [76]. However, the strong emission peak focused at about 418 nm may be also due to radiative recombination process and self-trapped excitations [12].…”

Fabrication and electromagnetic performance of talc/NiTiO 3 composite

“…With a narrow band gap of −2.18 eV, NiTiO 3 possesses significant photocatalytic property and unique photo response in the range of visible light [ 31 ], which was usually fabricated as a photocatalyst, not EM wave absorber: Zeng et al synthesized it for photocatalytic water splitting by harvesting solar energy; the rate of hydrogen generation was about threefold that of pure g-C 3 N 4 [ 32 ]. Pugazhenthiran et al [ 30 ] prepared it for photocatalytic degradation of ceftiofur sodium (CFS); nearly 97% CFS was mineralized under direct sunlight irradiation. These studies broadened the NiTiO 3 applications in water treatment for its enhanced photocatalytic ability.…”

“…In recent years, considerable attention has been paid to super-paramagnetic materials such as Ni, along with titanate (Ti) with enhanced high surface area [25][26][27][28][29][30]. With a narrow band gap of −2.18 eV, NiTiO 3 possesses significant photocatalytic property and unique photo response in the range of visible light [31], which was usually fabricated as a photocatalyst, not EM wave absorber: Zeng et al synthesized it for photocatalytic water splitting by harvesting solar energy; the rate of hydrogen generation was about threefold that of pure g-C 3 N 4 [32].…”