From Layered Basic Zinc Acetate Nanobelts to Hierarchical Zinc Oxide Nanostructures and Porous Zinc Oxide Nanobelts

Abstract

Novel hierarchical ZnO nanostructures, porous ZnO nanobelts, and nanoparticle chains are prepared from a precursor of synthetic bilayered basic zinc acetate (BLBZA) nanobelts. BLBZA nanobelts are obtained by a simple synthetic route under mild conditions. X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, and thermal analysis are used to characterize the BLBZA nanobelts and ZnO nanostructures. The obtained BLBZA precursor consists of a lamellar structure with two interlayer distances of 1.33 and 2.03 nm, exhibits a beltlike morphology, and has widths of 200 to 600 nm, thicknesses of 10 to 50 nm, and lengths of up to 50 μm. Refluxing an aqueous dispersion of BLBZA nanobelts at 120 °C for 12 h leads to the formation of well‐defined hierarchical ZnO nanostructures. The time‐dependent shape‐evolution process suggests that spindlelike ZnO particles form first, and then the ringlike nanosheets grow heterogeneously on the backbone of these spindles. In addition, calcination in air can remove ligand molecules and intercalated water molecules from BLBZA nanobelts, resulting in the formation of porous ZnO nanobelts and nanoparticle chains. The BLBZA nanobelts serve as templates during the transformation to form ZnO beltlike nanoparticle chains without morphological deformation. Photoluminescence results show that both the as‐synthesized hierarchical ZnO nanostructures and porous ZnO nanobelts show a narrow and sharp UV emission at 390 nm and a broad blue–green emission at above 466 nm when excited by UV light.

Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

“…The most commonly used approach is that involving SDAs ranging from simple molecules, such as amines [13][14][15][16] and anionic species, [17][18][19][20][21] to polymers (DBCP, [22][23][24][25][26][27][28][29] PVP, [30][31][32][33][34][35][36][37][38][39][40][41][42] PAM, 29 and PAH 43 ) and biomolecules. [44][45][46][47][48][49][50][51][52] The SDAs have been shown to affect the morphology of ZnO by imposition of effects on nucleation and/or growth of the crystals.…”

“…40,97 Since both G-12 and GT-16 have no acidic amino acid residues, the bound COO À most probably arose from the C-terminus of these peptides.…”

One-dimensional ZnO nanostructures: Solution growth and functional properties

“…(c) SEM image of ZnO nanobelt arrays grown on a metallic Zn substrate [168]. (d) SEM image of porous polycrystalline ZnO nanobelts and nanoparticle chains formed by the thermal decomposition of synthetic bilayered basic zinc acetate nanobelts [169]. Reproduced with permission…”

“…During calcination in air, organic ligands and intercalated water molecules were removed from the synthetic bilayered basic zinc acetate nanobelts, leaving behind the inorganic porous ZnO nanobelts and nanoparticle chains. In essence, the synthetic bilayered basic zinc acetate nanobelts serve as templates [169]. [73].…”

ZnO nano-rectangular framework-like structure from zinc hydroxide acetate plates

“…This phenomenon causes the formation of the framework-like structure. In other studies on the pyrolysis reaction of bilayered basic zinc acetate nanobelts 25) consisting of a lamellar structure with two interlayer distances, long nanoparticle chains were formed. Therefore, it is considered that the framework-like structure is characteristic of these LHZA.…”