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https://hdl.handle.net/2440/136882
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Type: | Journal article |
Title: | Graphene Bridge for Photocatalytic Hydrogen Evolution with Gold Nanocluster Co-Catalysts |
Author: | Mousavi, H. Small, T.D. Sharma, S.K. Golovko, V.B. Shearer, C.J. Metha, G.F. |
Citation: | Nanomaterials, 2022; 12(20):3638-1-3638-13 |
Publisher: | MDPI AG |
Issue Date: | 2022 |
ISSN: | 2079-4991 2079-4991 |
Statement of Responsibility: | Hanieh Mousavi, Thomas D. Small, Shailendra K. Sharma, Vladimir B. Golovko, Cameron J. Shearer and Gregory F. Metha |
Abstract: | Herein, the UV light photocatalytic activity of an Au101NC-AlSrTiO3-rGO nanocomposite comprising 1 wt% rGO, 0.05 wt% Au101(PPh3)21Cl5 (Au101NC), and AlSrTiO3 evaluated for H2 production. The synthesis of Au101NC-AlSrTiO3-rGO nanocomposite followed two distinct routes: (1) Au101NC was first mixed with AlSrTiO3 followed by the addition of rGO (Au101NC-AlSrTiO3:rGO) and (2) Au101NC was first mixed with rGO followed by the addition of AlSrTiO3 (Au101NC-rGO:AlSrTiO3). Both prepared samples were annealed in air at 210 °C for 15 min. Inductively coupled plasma mass spectrometry and high-resolution scanning transmission electron microscopy showed that the Au101NC adhered almost exclusively to the rGO in the nanocomposite and maintained a size less than 2 nm. Under UV light irradiation, the Au101NC-AlSrTiO3:rGO nanocomposite produced H2 at a rate 12 times greater than Au101NC-AlSrTiO3 and 64 times greater than AlSrTiO3. The enhanced photocatalytic activity is attributed to the small particle size and high loading of Au101NC, which is achieved by non-covalent binding to rGO. These results show that significant improvements can be made to AlSrTiO3-based photocatalysts that use cluster co-catalysts by the addition of rGO as an electron mediator to achieve high cluster loading and limited agglomeration of the clusters. |
Keywords: | gold nanocluster; reduced graphene oxide; SrTiO3; photocatalysis; hydrogen evolution reaction |
Description: | Published: 17 October 2022 |
Rights: | © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). |
DOI: | 10.3390/nano12203638 |
Grant ID: | http://purl.org/au-research/grants/arc/FT190100854 |
Published version: | http://dx.doi.org/10.3390/nano12203638 |
Appears in Collections: | Chemistry publications |
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hdl_136882.pdf | Published version | 5.7 MB | Adobe PDF | View/Open |
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