Facile microwave-assisted synthesis and controllable architecture of three-dimensional nickel titanate

Abstract

A rapid, facile, one-pot microwave-assisted polyol synthesis of novel hierarchical nickel titanate is first reported. The roles of medium dielectric and precursor counterion in the crystal growth and shape evolution are investigated.

Photocatalytic Performance of Titanates with Formula MTiO3 (M= Fe, Ni, and Co) Synthesized by Solvo-Combustion Method

“…These have a rhombohedral crystal structure of the R-3H space group with a hexagonal packing of the oxygen atoms occupying 2/3 of the octahedral positions, where M and Ti occupy alternating layers. The titanates of transition metals like Fe, Ni, Co-own diverse properties such as electricity, magnetism and semiconductivity [1][2][3][4] . These properties make titanates widely used in industry, for example, such as semiconductor rectifiers, electrodes of a solid oxide fuel cell, metal-air barrier, hydro-carbonate catalyzers, color mixtures for surface coating and gas sensing devices, among other applications [5][6][7][8][9][10] .…”

Facile one-pot synthesis of nickel-incorporated titanium dioxide/graphene oxide composites: Enhancement of photodegradation under visible-irradiation

“…Nonetheless, in the Raman spectra, several additional frequencies were observed only for N-40 and N-50 materials. Bands near 232, 280, 338, 386, 610, 696, and 753 cm -1 were assigned to NiTiO 3 [5,14]. Some of the missing NiTiO 3 peaks in the present study were attributed to low peak intensity [5].…”

“…The nucleation process was accelerated to form abundant crystal nuclei or crystal seeds. Owing to favorable conditions, crystal growth occurred nearly simultaneously with the nucleation process and resulted in irregularly sized particles [14]. In this work, the grain growth underwent two stages: (i) drum-shaped seeds grew isotropically until reaching 60 -70 nm in diameter and were self-assembled into prism-like particles, after which (ii) the particles grew along the c-axis.…”

“…Notwithstanding, process (ii) was more complicated. Basically, Ni species from the precursor were assumed to be deposited randomly on the surface of GO and react with Ti species, leading to the establishment of titanium-nickel-glycolate complexes after reaction under microwave conditions [14]. Continuous heat treatment in a nitrogen atmosphere might induce the formation of TiO 2 , and the remaining bare Ni atoms were further redeposited to larger particles via Ostwald ripening phenomenon [56].…”

“…Rodríguez-González et al prepared Ni-TiO 2 by a simple sol-gel method for the photo-degradation of alizarin red S dye [7]. Sharma [14][15][16][17][18][19].…”