Facile hydrothermal and novel preparation of nanostructured Ho2O3 for photodegradation of eriochrome black T dye as water pollutant

Abstract

Ho(OH) 3 nanostructures were synthesized via a new facile hydrothermal reaction between Ho(NO 3) 3 .6H 2 O and tetraethylenepentamine (tepa) as novel precipitator in presence of bis-(2-hydroxy-1-naphthaldehyde)-ophenylenediamine Schiff base compound as new capping agent. Pure Ho 2 O 3 nanostructures were prepared by thermal conversion of Ho(OH) 3 nanostructures in air at 600 °C for 4h. The as-obtained nanostructured samples were characterized by field emission scanning electron microscopy (FESEM), energy dispersive X-ray microanalysis (EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. Effects of reaction temperature, reaction duration and Schiff base compound as new capping agent on the shape and particle size of the final samples were studied. It was found that the particle size and shape of the samples could be controlled by setting these factors. The photocatalytic behavior of as-obtained Ho 2 O 3 nanostructures was also examined by photodegradation of eriochrome black T dye as water pollutant.

Effect of zirconia on improving NOx reduction efficiency of Nd2Zr2O7 nanostructure fabricated by a new, facile and green sonochemical approach

“…Nowadays, the usage of nanoscale compounds in diverse fields is very significant [1] , [2] , [3] , [4] . Among the nanoscale compounds, rare earth zirconium oxides (Re 2 Zr 2 O 7 ) have been examined by the scholars because of their extraordinary attributes.…”

Investigation of microstructure and selected properties of Al2O3-Cu and Al2O3-Cu-Mo composites

“…Its low density, high hardness, and thermal and chemical stability combined with the ductility of the metal particles result in the composite material with promising properties [8,9]. Moreover, the literature data shows that the application of ceramic nanostructures in composites is an important factor for environmental remediation [10][11][12][13]. Nowadays, it is important to pay attention to the selection of components on the ecological aspects.…”

Evaluation of free water removal from different sludge by solar energy utilization

“…The production of Dy 2 Sn 2 O 7 and Dy 2 Ce 2 O 7 by the juice of Punica granatum as nanostructural photocatalyst was used for removal and destruction of organic pollutants and methylene blue contaminants [26,27]. In another study green tea extract (GrTeEx), Ln 2 Zr 2 O 7 ceramic nanostructures, and Pure Ho 2 O 3 photocatalysts were used for pollutant reduction [28,29], also Neodymium oxide and pure neodymium zirconate nanostructures were offered for the degradation of rhodamine under the UV light and eosin contaminant [30,31].…”