Journal article
10×-Enhanced Heterogeneous Nanocatalysis on a Nanoporous Gold Disk Array with High-Density Hot Spots
ACS applied materials & interfaces, Vol.11(14), pp.13499-13506
03/26/2019
DOI: 10.1021/acsami.8b19914
PMID: 30873828
Abstract
Certain noble metal nanostructures as heterogeneous photocatalysts have drawn significant attention in the recent past because of their unique optical properties which lead to the excitation of localized surface plasmon resonance (LSPR). The LSPR concentrates electromagnetic fields to the surfaces and its relaxation processes can convert photon energy to energetic charge carriers or heat, which can be subsequently harvested to enhance surface catalysis. Here, we report the catalytic performance of a novel plasmonic nanostructure, disk-shaped nanoporous gold (NPG) nanoparticles or simply NPG disks, using a well-tested reduction pathway of resazurin to resorufin. We show that the catalytic reaction rate of NPG disks is enhanced by 10-fold upon external light illumination because of the excitation of LSPR. The plasmon-enhanced catalytic reaction follows a linear-to-superlinear transition in the rate dependence on the input light power. In addition, the light input results in a room temperature reaction rate equivalent to that of an ambient temperature of 70 °C. Together, the results support that hot charge carriers play the dominant role in the enhancement.
Details
- Title: Subtitle
- 10×-Enhanced Heterogeneous Nanocatalysis on a Nanoporous Gold Disk Array with High-Density Hot Spots
- Creators
- Md Masud Parvez ArnobCamille ArturIbrahim MisbahSyed Mubeen - University of IowaWei-Chuan Shih
- Resource Type
- Journal article
- Publication Details
- ACS applied materials & interfaces, Vol.11(14), pp.13499-13506
- DOI
- 10.1021/acsami.8b19914
- PMID
- 30873828
- ISSN
- 1944-8244
- eISSN
- 1944-8252
- Grant note
- DOI: 10.13039/100000146, name: Division of Chemical, Bioengineering, Environmental, and Transport Systems, award: CBET-1605683, CBET-1643391, CBET-1151154
- Language
- English
- Date published
- 03/26/2019
- Academic Unit
- Civil and Environmental Engineering; Chemical and Biochemical Engineering
- Record Identifier
- 9984197334502771
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