Mild Synthetic Routes to High‐Surface Zinc Oxide Nanopowders

Abstract

ZnO nanostructured powders have been prepared at low temperature and atmospheric pressure by thermal decomposition of solid precursors. Two alternative methods have been explored by using: (i) commercial zinc acetate dihydrate and (ii) a solid mixture obtained after the evaporation of a solution of zinc acetate in aqueous ammonia at 90°C. Powder X-ray diffraction characterization shows that in both cases crystalline ZnO was obtained after precursor treatment at 90°C over 150 h. According to attenuated total reflection Fourier transform infrared analysis, powders obtained by both routes retain a small percentage of adsorbed acetate. Elemental analysis proves that almost 98 wt.-% of acetate

Effect of pH and aging temperature on the phosphorus removal properties of layered hydroxide synthesized from zinc acetate

“…In this study, there was a further approximately 3% weight loss between 250°C and 400°C. This was assigned to the release of volatile materials from the zinc-bearing materials [22][23][24]. The ZHAs, including ZnO, such as the powders obtained at pH 9 aged at 90°C and 120°C, showed no or very small endothermic peaks.…”

Zinc Hydroxyacetate and Its Transformation to Nanocrystalline Zinc Oxide

“…Multipoint (five points) measurement was conducted on the sample. Cross-polarization magic-angle-spinning (CPMAS) 13 C NMR spectra were recorded using a Bruker 200 MHz NMR spectrometer operating at 50 MHz. The sample was loaded into a 4-mm zirconium oxide rotor with a Kel-F cap and spun at 5000 Hz.…”

Chemical Bath Deposition of ZnO Nanowires at Near-Neutral pH Conditions without Hexamethylenetetramine (HMTA): Understanding the Role of HMTA in ZnO Nanowire Growth

“…Diffuse reflectance infrared Fourier transform (DRIFT) spectra of the washed ZnO nanopowder (Strem) showed two minor absorbance peaks in the 1600-1300 cm -1 region, which we attributed to bound acetate ligands from the zinc acetate precursor used during the Strem nanopowder synthesis. 13 To eliminate concerns regarding the effect on adsorption of bound acetate groups, the HMTA adsorption study was also performed on ZnO nanopowders (Sigma and Alfa Aesar) that did not show any surface impurities but had lower BET values. All ZnO nanopowders used in this study displayed the same time-dependent ATR-FTIR spectra during HMTA adsorption.…”