An Aminolytic Approach toward Hierarchical β-Ni(OH)2 Nanoporous Architectures: A Bimodal Forum for Photocatalytic and Surface-Enhanced Raman Scattering Activity
- 8 September 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 49 (19), 8813-8827
- https://doi.org/10.1021/ic1015065
Abstract
A surfactantless, trouble-free, and gentle wet chemistry approach has been used to interpret the precisely controlled growth of β-Ni(OH)2 with the assistance of ammonia and nickel acetate from seedless mild hydrothermal conditions. A thorough investigation of the reaction kinetics and product morphology with varied concentration of NH3 and different reaction times suggests that a putative mechanism of dissolution, recrystallization, and oriented attachment supports the intelligent self-assembly of nanobuilding blocks. Associated characterizations (FTIR, PXRD, FESEM, EDAX, HRTEM, and Raman) have identified it to be pure β-Ni(OH)2 without any signature of contamination. The assembled units result in porous frameworks (nanoflowers and nanocolumns) and are indeed full of communally intersecting nanopetals/nanoplates with both lengths and widths on the order of micrometer to nanometer length scale. The as-synthesized material could also be used as a precursor for nanometric black NiO under calcination. The hydroxide has been found to be a potent and environmentally benign material because it warrants its photocatalytic activity through dye mineralization. Finally, Ni(OH)2 has been photochemically derivatized with dosages of silver nanoparticles bringing a competent composite authority Ag@Ni(OH)2, to give a full-proof enhanced field effect of prolific SERS activity. In a nutshell, these results are encouraging and fetch new promise for the fabrication of a low-cost and high-yielding greener synthetic protocol for a functional material with promising practicability.This publication has 100 references indexed in Scilit:
- Demonstration of Surface-Enhanced Raman Scattering by Tunable, Plasmonic Gallium NanoparticlesJournal of the American Chemical Society, 2009
- Nanoparticle Metal−Semiconductor Charge Transfer in ZnO/PATP/Ag Assemblies by Surface-Enhanced Raman SpectroscopyThe Journal of Physical Chemistry C, 2008
- Facile approach to prepare loose-packed NiO nano-flakes materials for supercapacitorsChemical Communications, 2008
- Synthesis and characterization of hierarchical NiO nanoflowers with porous structureJournal of Crystal Growth, 2007
- A Facile Route to Oriented Nickel Hydroxide Nanocolumns and Porous Nickel OxideThe Journal of Physical Chemistry C, 2007
- Surfactant effects on pH-controlled synthesis of nickel hydroxidesColloids and Surfaces A: Physicochemical and Engineering Aspects, 2006
- Hexamethylenetetramine Directed Synthesis and Properties of a New Family of α-Nickel Hydroxide Organic−Inorganic Hybrid Materials with High Chemical StabilityThe Journal of Physical Chemistry B, 2006
- Photocatalytic degradation of a cationic azo dye by TiO2/bentonite nanocompositeJournal of Photochemistry and Photobiology A: Chemistry, 2002
- Surface-Enhanced Raman Scattering Spectroscopy of Organometallics in Systems with Aqueous Silver ColloidsInorganic Chemistry, 1994
- Surface-enhanced Raman spectroscopy of adsorbates on semiconductor electrode surfaces: tris(bipyridine)ruthenium(II) adsorbed on silver-modified n-gallium arsenide(100)The Journal of Physical Chemistry, 1983