Synthesis, structural characterization of nano ZnTiO₃ ceramic: An effective azo dye adsorbent and antibacterial agent

Abstract

Nanocrystalline meta-zinc titanate (ZnTiO 3 ) ceramic was prepared using a self-propagating solution combustion synthesis (SCS) for the first time using urea as fuel. The product was calcined at 800 • C for 2 h to improve the crystallinity. Powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), high resolution transmission electron microscopy (HR-TEM) and UV-vis absorption spectroscopy were used to characterize the final product. PXRD results show that the ilmenite type rhombohedral structure was formed when the sample was calcined at 800 • C for 2 h. Adsorption experiments were performed with cationic malachite green (MG) dye. ∼96% dye was adsorbed onto nanocrystalline ZnTiO 3 ceramic at pH 9 for 30 min of the contact time. The optimum adsorbent dose was found to be 0.45 g/L of dye. Langmuir-Hinshelwood model was used to study adsorption kinetics and first order kinetic model best describes the MG adsorption on ZnTiO 3 . Antibacterial activity was investigated against gram negative Klebsiella aerogenes, Pseudomonas desmolyticum, Escherichia coli, and gram positive Staphylococcus aureus bacteria by agar well diffusion method. Nanocrystalline ZnTiO 3 ceramic showed significant effect on all the four bacterial strains at the concentration of 1000 and 1500 g per well.

Synthesis, characterizations, antibacterial and photoluminescence studies of solution combustion-derived α-Al2O3nanoparticles

“…To synthesize ␣-Al 2 O 3 nanoparticles solution combustion synthesis method was used [27,28]. Fuel type and fuel/aluminium nitrate molar ratio proved to be of great importance during the preparation of ␣-Al 2 O 3 powders [29,30].…”

Synthesis of ZnTiO3@TiO2 Heterostructure Nanomaterial as a Visible light Photocatalyst

“…Among these, ZnTiO 3 has great potential in photocatalysis because of high reduction potential and low oxidation potential and also it suppresses recombination rate of photogenerated electrons and holes similar to other photocatalysts. However, the perovskite ZnTiO 3 is a type of ABO 3 and it has BO 6 octahedra with A 2+ cations inserted in the structure . Until, Various methods are used to synthesize ZnTiO 3 powder such as solid state method, hydrothermal method, sol‐gel method and magnetron sputtering methods .…”

Synergistic Mechanism of ZnFe2O4/ZnO Nanopowder in Photocatalytic Degradation of Acid Orange 7

“…The methods used for the removal of these dyes include adsorption, reverse osmosis, membrane filtration, electrocoagulation, ion exchange, electroflocculation, etc. [19]. These methods have various drawbacks such as long retention time, requirement of high dissolved oxygen concentration, high electricity consumption, short half-life, specificity only to certain dyes, etc.…”