The effect of polymers onto the size of zinc layered hydroxide salt and its calcined product

Abstract

Zinchydroxide nitrate, a brucite-like layered material was synthesized using pH control method. Poly(vinyl alcohol) and poly(ethylene glycol) were used at various percentages as size decreasing agents during the synthesis of zinchydroxide nitrate. SEM and PXRD showed the decrease of size and thickness of the resultant zinchydroxide nitrates. TG and surface area data confirmed the decrease of the particle sizes, too. When zinchydroxide nitrates were heat treated at 500 °C, the physical properties of nano zinc oxides obtained depended on the parent material, zinchydroxide nitrate.

Synthesis and characterization of nano-sized ɛ-Zn(OH)2 and its decomposed product, nano-zinc oxide

“…The weak peak at around 1638 cm −1 can be attributed to carboxylate group stretching vibrations of the adsorbed DG. This very small band reveals that the DG does not adsorb strongly onto the particles surfaces during the synthesis and is washed out predominantly in the washing step [4]. The broad band at around 3237-3410 cm −1 is due to the O-H stretching of the hydroxyl groups of -Zn(OH) 2 and/or physically adsorbed water molecules [4,17,18].…”

“…Wulfingite, -Zn(OH) 2 (Card 1960) is one of the structures of zinc hydroxide with orthorhombic structure. This material has been rarely studied based on the open literature [3][4][5][6]. Moreover, the material has always been produced accompanied by second phase, but not in pure phase [3][4][5][6].…”

Zinc-stearate-layered hydroxide nanohybrid material as a precursor to produce carbon nanoparticles

“…This is due to their ability to intercalate various functional anions between their layers and other important physicochemical properties for technological applications as food additive [10] and controlled release [11] formulations, biosensor [12], ion scavenger [13][14][15], electrochemical performance [16], etc. Furthermore, they have frequently been used as precursors and templates to produce various metal oxides [17], catalysts [18], carbon [19], porous materials [20], etc.…”

“…Zinc layered hydroxide nitrate (ZLH) is an anionic synthetic layered material whose layers are constructed by hydroxide groups and water molecules [17]. Octahedral holes within the layers are occupied by only one type cation, zinc ions.…”

“…This is against the other anionic layered materials, layered double hydroxides (LDHs) with at least two types of cations within the layers [11]. The nitrate groups are positioned between the layers freely and are not directly coordinated with the zinc ions in the ZLH [17]. The intercalation or ion-exchange process of the interlayer nitrates with other inorganic or organic anions can improve properties rather than their counterparts or it can produce new properties for the obtained nanohybrid materials [21].…”