Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Generalized Synthesis of Highly-Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Journal Article · · Small Methods
 [1];  [1];  [2];  [1]
  1. Temple Univ., Philadelphia, PA (United States)
  2. Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Robust synthesis of ultrafine metal nanoparticles (ufMNPs) below 5 nm with clean surfaces and strong optical absorption in the visible spectral range is challenging due to their instability originating from large surface-to-volume ratios. Here, this work reports a general strategy involving two sequential steps: i) loading metal precursor ions onto the surface of silica nanospheres (SiOx NSs) by forming a uniform coating of metal oxyhydroxide [MOy(OH)z] through preferred surface acid–base reactions and ii) thermally reducing MOy(OH)z in forming gas at elevated temperatures to form ufMNPs evenly dispersed on the surface of SiOx NSs. The capability of this synthesis strategy is verified by loading ufMNPs of various transition metals and bimetallic combinations onto the SiOx NSs. The ufMNPs exhibit strong optical absorption enhanced by the optical scattering resonances in the SiOx NSs, which generate intense electric fields near the surface of the SiOx NSs. The SiOx NSs also support stabilizing the ufMNPs, which do not need additional organic capping reagents. The successful synthesis of SiOx-NS-supported ufMNPs with clean surfaces and enhanced optical absorption is promising for exploring the photocatalytic properties of ufMNPs.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); Temple University
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2566116
Alternate ID(s):
OSTI ID: 2341663
Journal Information:
Small Methods, Journal Name: Small Methods Journal Issue: 2 Vol. 9; ISSN 2366-9608
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (34)

Quantum-Sized Metal Catalysts for Hot-Electron-Driven Chemical Transformation journal August 2018
Selective Transfer Coupling of Nitrobenzene to Azoxybenzene on Rh Nanoparticle Catalyst Promoted by Photoexcited Hot Electrons journal May 2019
Cu x Ni1−x alloy nanoparticles embedded SiO2 films: synthesis and structure journal July 2010
Encapsulation of supported Pt nanoparticles with mesoporous silica for increased catalyst stability journal November 2010
Highly Dispersed RuOOH Nanoparticles on Silica Spheres: An Efficient Photothermal Catalyst for Selective Aerobic Oxidation of Benzyl Alcohol journal January 2020
Controlled growth of monodisperse silica spheres in the micron size range journal January 1968
TiO nanotube-supported ruthenium(III) hydrated oxide: A highly active catalyst for selective oxidation of alcohols by oxygen journal October 2005
On-line tracking of the coating of nanoscaled silica with titania nanoparticles via zeta-potential measurements journal January 2006
Detection of gold nanoparticles with different sizes using absorption and fluorescence based method journal May 2016
Biogenic and Synthetic MnO 2 Nanoparticles: Size and Growth Probed with Absorption and Raman Spectroscopies and Dynamic Light Scattering journal March 2019
Deciphering the Optical Absorption Spectra of Ultrafine Metal Nanoparticles Dispersed on Submicron Silica Spheres journal October 2022
Amplified Generation of Hot Electrons and Quantum Surface Effects in Nanoparticle Dimers with Plasmonic Hot Spots journal August 2016
What’s so Hot about Electrons in Metal Nanoparticles? journal June 2017
Plasmonic Photocatalysis with Chemically and Spatially Specific Antenna–Dual Reactor Complexes journal October 2022
Reducing the Energy Band Gap of Cobalt Hydroxide Nanosheets with Silver Atoms and Enhancing Their Electrical Conductivity with Silver Nanoparticles journal August 2021
Semiconductor Photocatalysis of Bicarbonate to Solar Fuels: Formate Production from Copper(I) Oxide journal December 2017
Surfactant Removal for Colloidal Nanoparticles from Solution Synthesis: The Effect on Catalytic Performance journal June 2012
All Positive Ions Give Acid Solutions in Water journal June 1996
The Solubility of Amorphous Silica in Water journal June 1954
Synthesis and Characterization of Colloidal-Supported Metal Nanoparticles as Potential Intermediate Nanocatalysts journal March 2010
Plasmon-induced hot carrier science and technology journal January 2015
Near-field dielectric scattering promotes optical absorption by platinum nanoparticles journal May 2016
Mesoporous titanium dioxide coating on gold modified silica nanotubes: a tube-in-tube titanium nanostructure for visible-light photocatalysts journal January 2015
Selective direct hydroxylation of benzene to phenol with hydrogen peroxide by iron and vanadyl based homogeneous and heterogeneous catalysts journal January 2016
Surface chemistry of quantum-sized metal nanoparticles under light illumination journal January 2021
Mechanism of photocatalytic CO2 methanation on ultrafine Rh nanoparticles journal January 2024
Rational synthesis of Pt spheres with hollow interior and nanosponge shell using silica particles as template journal January 2011
Photoassisted synthesis of manganese oxide nanostructures using visible light at room temperature journal January 2013
Promoting reactivity of photoexcited hot electrons in small-sized plasmonic metal nanoparticles that are supported on dielectric nanospheres journal February 2020
Heterometallic antenna−reactor complexes for photocatalysis journal July 2016
One stone, two birds: silica nanospheres significantly increase photocatalytic activity and colloidal stability of photocatalysts journal February 2018
Earth-abundant photocatalyst for H 2 generation from NH 3 with light-emitting diode illumination journal November 2022
Photocatalytic hot-carrier chemistry journal January 2020
Solubility and Dissolution Rate of Amorphous Silica in Distilled and Sea Water at 20°C journal January 1968