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Title: Photosynthesis and characterization of Prussian blue nanocubes on surfaces of TiO{sub 2} colloids

Abstract

Prussian blue (PB) nanocubes were synthesized on the surface of titania (TiO{sub 2}) colloids using two-step process with ultraviolet light illumination. The formation of PB nanocubes starts with its nucleation under strong ultraviolet light illumination and followed by a slow growth of the nuclei under low intensity natural light illumination. This kind of PB nanocube has a very low Curie temperature.

Authors:
; ;  [1]
  1. Key Lab of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
20778667
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 88; Journal Issue: 5; Other Information: DOI: 10.1063/1.2169909; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATALYSIS; COLLOIDS; CRYSTAL GROWTH; CURIE POINT; FERROCYANIDES; ILLUMINANCE; IRON COMPOUNDS; NANOSTRUCTURES; NUCLEATION; PHOTOSYNTHESIS; SEMICONDUCTOR MATERIALS; SURFACES; TITANIUM OXIDES; ULTRAVIOLET RADIATION

Citation Formats

Song Yanyan, Zhang Ke, and Xia Xinghua. Photosynthesis and characterization of Prussian blue nanocubes on surfaces of TiO{sub 2} colloids. United States: N. p., 2006. Web. doi:10.1063/1.2169909.
Song Yanyan, Zhang Ke, & Xia Xinghua. Photosynthesis and characterization of Prussian blue nanocubes on surfaces of TiO{sub 2} colloids. United States. doi:10.1063/1.2169909.
Song Yanyan, Zhang Ke, and Xia Xinghua. Mon . "Photosynthesis and characterization of Prussian blue nanocubes on surfaces of TiO{sub 2} colloids". United States. doi:10.1063/1.2169909.
@article{osti_20778667,
title = {Photosynthesis and characterization of Prussian blue nanocubes on surfaces of TiO{sub 2} colloids},
author = {Song Yanyan and Zhang Ke and Xia Xinghua},
abstractNote = {Prussian blue (PB) nanocubes were synthesized on the surface of titania (TiO{sub 2}) colloids using two-step process with ultraviolet light illumination. The formation of PB nanocubes starts with its nucleation under strong ultraviolet light illumination and followed by a slow growth of the nuclei under low intensity natural light illumination. This kind of PB nanocube has a very low Curie temperature.},
doi = {10.1063/1.2169909},
journal = {Applied Physics Letters},
number = 5,
volume = 88,
place = {United States},
year = {Mon Jan 30 00:00:00 EST 2006},
month = {Mon Jan 30 00:00:00 EST 2006}
}
  • We demonstrate a facile procedure to efficiently prepare Prussian blue nanocubes/reduced graphene oxide (PBNCs/rGO) nanocomposite by directly mixing Fe3+ and [Fe(CN)6]3 in the presence of GO in polyethyleneimine aqueous solution, resulting in a novel acetylcholinesterase (AChE) biosensor for detection of organophosphorus pesticides (OPs). The obtained nanocomposite was characterized by X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) microanalysis. It was clearly observed that the nanosheet has been decorated with cubic PB nanoparticles and nearly all the nanoparticles are distributed uniformly only on the surface of the reduced GO. No isolated PB nanoparticles were observed, indicatingmore » the strong interaction between PB nanocubes and the reduced GO and the formation of PBNCs/rGO nanocomposite. The obtained PBNCs/rGO based AChE biosensor make the peak potential shift negatively to 220 mV. The AChE biosensor shows rapid response and high sensitivity for detection of monocrotophos. These results suggest that the PBNCs/rGO hybrids nanocomposite exhibited high electrocatalytic activity towards the oxidation of thiocholine, which lead to the sensitive detection of OP pesticides.« less
  • Exploring nonprecious metal electrocatalysts to replace the noble metal-based catalysts for full water electrocatalysis is still an ongoing challenge. In this work, porous structured ternary nickel–iron–phosphide (Ni–Fe–P) nanocubes were synthesized through one-step phosphidation of a Ni–Fe-based Prussian blue analogue. The Ni–Fe–P nanocubes exhibit a rough and loose porous structure on their surface under suitable phosphating temperature, which is favorable for the mass transfer and oxygen diffusion during the electrocatalysis process. As a result, Ni–Fe–P obtained at 350 °C with poorer crystallinity offers more unsaturated atoms as active sites to expedite the absorption of reactants. Additionally, the introduction of nickel improvedmore » the electronic structure and then reduced the charge-transfer resistance, which would result in a faster electron transport and an enhancement of the intrinsic electrocatalytic activities. Benefiting from the unique porous nanocubes and the chemical composition, the Ni–Fe–P nanocubes exhibit excellent hydrogen evolution reaction and oxygen evolution reaction activities in alkaline medium, with low overpotentials of 182 and 271 mV for delivering a current density of 10 mA cm–2, respectively. Moreover, the Ni–Fe–P nanocubes show outstanding stability for sustained water splitting in the two-electrode alkaline electrolyzer. Furthermore, this work not only provides a facile approach for designing bifunctional electrocatalysts but also further extends the application of metal–organic frameworks in overall water splitting.« less
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  • Here, magnetic data are reported for Prussian Blue Analogs (PBAs) of composition M3[M'(C,N)6]2·xH2O, where M = Mn, Co, Ni or Cu and M' = Cr, Fe or Co and x is the number of water molecules per unit cell. PBAs crystallize in cubic framework structures, which consist of alternating MIIIN6 and MIIC6 octahedra. Occupancies of the octrahedra are not perfect: they may be empty and the charges are balanced by the oxygen atoms originating from guest water molecules at the lattice site ( C or N site) or the interstitial site (between the octahedrals) of the unit cell. Large crystal-fieldmore » splittings due to the octrahedral environment results in a combination of low- or high-spin configurations of localized magnetic bivalent and trivalent 3d moments. The magnetic susceptibility of studied PBAs follows the Curie–Weiss behavior in the paramagnetic region up to room temperature. Moreover, the data provide evidence for a long-range magnetic ground state for most metal hexacyanochromates and all metal hexacyanoferrates, while hexacyanocobaltates remain paramagnetic down to the lowest temperature measured (2 K). For all compounds, the effective magnetic moments determined from experiments were found to be in reasonable agreement with predicted combinations of high- and low-spin moments.« less
  • Here, magnetic data are reported for Prussian Blue Analogs (PBAs) of composition M3[M'(C,N)6]2·xH2O, where M = Mn, Co, Ni or Cu and M' = Cr, Fe or Co and x is the number of water molecules per unit cell. PBAs crystallize in cubic framework structures, which consist of alternating MIIIN6 and MIIC6 octahedra. Occupancies of the octrahedra are not perfect: they may be empty and the charges are balanced by the oxygen atoms originating from guest water molecules at the lattice site ( C or N site) or the interstitial site (between the octahedrals) of the unit cell. Large crystal-fieldmore » splittings due to the octrahedral environment results in a combination of low- or high-spin configurations of localized magnetic bivalent and trivalent 3d moments. The magnetic susceptibility of studied PBAs follows the Curie–Weiss behavior in the paramagnetic region up to room temperature. Moreover, the data provide evidence for a long-range magnetic ground state for most metal hexacyanochromates and all metal hexacyanoferrates, while hexacyanocobaltates remain paramagnetic down to the lowest temperature measured (2 K). For all compounds, the effective magnetic moments determined from experiments were found to be in reasonable agreement with predicted combinations of high- and low-spin moments.« less