Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Abstract

In this work, germanium dioxide nanostructures were prepared by a facile co-precipitation method. In this synthesis approach was used from acetyl acetone as capping agent to get the smallest nanoparticles. Some of effective parameters were optimized to achieve the best morphology of product, such as mole ratio of acetyl acetone, temperature and time. Small germania nanostructures with a size about 70 nm sizes were achieved in this method. Nanostructures were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared techniques X-ray energy dispersive spectroscopy and ultraviolet spectroscopy (UV-Vis). Various properties such as photoluminescence, photocatalytic and photovoltaic property were studied for as-prepared nanostructures. Results of germania nanostructures show that product revealed a PL band that caused from recombination of electron and hole in nanostructure. On the other hand, these nanostructures show a good photocatalytic behavior for degradation of methyl orange in presence of UV light. Therefore germania nanoparticles applied in photovoltaic measurement.

Germanium Dioxide Nanoparticles Mitigate Biochemical and Molecular Changes Characterizing Alzheimer’s Disease in Rats

“…The results for GeO 2 NPs are shown in ( Figure 2 e). The well-reported GeO 2 characteristic bands [ 26 , 28 ] were observed. The first was the triplet band at 580, 550, and 510 cm −1 , which corresponded to symmetric Ge-OH stretching, and the second was at 870 cm −1 , which corresponded to GeO–Ge antisymmetric stretching.…”

“…Unlike other methods, co-precipitation can be easily optimized. Adjusting the temperature, reaction time, and the ratio between acetylacetone and germanium tetrachloride could alter the size of the produced GeO 2 NPs [ 28 ].…”

“…GeO 2 NPs were quasi-spherical in shape with a diameter of 20 nm. In contrast to the previous study of Nejaty-Moghadam and his colleagues [ 28 ], we changed the reaction duration from 30 min to 4 h, and the reaction temperature was raised to 150 °C instead of 50 °C while maintaining a 4:1 ratio between acetylacetone and germanium tetrachloride. In the case of CeO 2 NPs, the produced nanoparticles were 12–15 nm in diameter, as reported earlier [ 47 ] with a spherical shape.…”

“…GeO 2 NPs were synthesized as previously described [ 28 ] with some modifications. In brief, acetylacetone (10 mL) and ethylene glycol (10 mL) were properly mixed.…”

Ce Doped Germanium Dioxide Nanowires and Solar Light Photocatalytic Performance

“…Using ZnO immobilised in alginate gel beads as the photocatalyst, GV could be degraded under 125 W medium pressure mercury lamp [7]. Germanium dioxide was used for the photocatalytic degradation of methyl orange and acid violet [8]. However, germanium dioxide, TiO 2 and ZnO can only absorb UV light owing to large band gap limiting the wide application.…”