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Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation

Khaled Alshammari, Yubiao Niu, Richard Palmer Orcid Logo, Nikolaos Dimitratos

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Volume: 378, Issue: 2176, Start page: 20200057

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1098/rsta.2020.0057

Abstract

A sol-immobilization method is used to synthesize a series of highly active and stable AuxPd1−x/TiO2 catalysts (where x = 0, 0.13, 0.25, 0.5, 0.75, 0.87 and 1) for wastewater remediation. The catalytic performance of the materials was evaluated for the catalytic reduction of 4-nitrophenol, a model w...

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Published in: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
ISSN: 1364-503X 1471-2962
Published: The Royal Society 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54694
first_indexed 2020-07-13T08:39:27Z
last_indexed 2020-08-22T03:19:12Z
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spelling 2020-08-21T17:53:05.0391785 v2 54694 2020-07-13 Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2020-07-13 ACEM A sol-immobilization method is used to synthesize a series of highly active and stable AuxPd1−x/TiO2 catalysts (where x = 0, 0.13, 0.25, 0.5, 0.75, 0.87 and 1) for wastewater remediation. The catalytic performance of the materials was evaluated for the catalytic reduction of 4-nitrophenol, a model wastewater contaminant, using NaBH4 as the reducing agent under mild reaction conditions. Reaction parameters such as substrate/metal and substrate/reducing agent molar ratios, reaction temperature and stirring rate were investigated. Structure-activity correlations were studied using a number of complementary techniques including X-ray powder diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. The sol-immobilization route provides very small Au–Pd alloyed nanoparticles, with the highest catalytic performance shown by the Au0.5Pd0.5/TiO2 catalyst.This article is part of a discussion meeting issue ‘Science to enable the circular economy’. Journal Article Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378 2176 20200057 The Royal Society 1364-503X 1471-2962 24 7 2020 2020-07-24 10.1098/rsta.2020.0057 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2020-08-21T17:53:05.0391785 2020-07-13T09:37:14.8418597 Khaled Alshammari 1 Yubiao Niu 2 Richard Palmer 0000-0001-8728-8083 3 Nikolaos Dimitratos 4 54694__17703__e8b7b1170b2e494fbc6dd7f96237019a.pdf 54694.pdf 2020-07-14T10:17:47.3561677 Output 1538880 application/pdf Accepted Manuscript true true eng
title Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
spellingShingle Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
Richard Palmer
title_short Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
title_full Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
title_fullStr Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
title_full_unstemmed Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
title_sort Optimization of sol-immobilized bimetallic Au–Pd/TiO2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Khaled Alshammari
Yubiao Niu
Richard Palmer
Nikolaos Dimitratos
format Journal article
container_title Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
container_volume 378
container_issue 2176
container_start_page 20200057
publishDate 2020
institution Swansea University
issn 1364-503X
1471-2962
doi_str_mv 10.1098/rsta.2020.0057
publisher The Royal Society
document_store_str 1
active_str 0
description A sol-immobilization method is used to synthesize a series of highly active and stable AuxPd1−x/TiO2 catalysts (where x = 0, 0.13, 0.25, 0.5, 0.75, 0.87 and 1) for wastewater remediation. The catalytic performance of the materials was evaluated for the catalytic reduction of 4-nitrophenol, a model wastewater contaminant, using NaBH4 as the reducing agent under mild reaction conditions. Reaction parameters such as substrate/metal and substrate/reducing agent molar ratios, reaction temperature and stirring rate were investigated. Structure-activity correlations were studied using a number of complementary techniques including X-ray powder diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. The sol-immobilization route provides very small Au–Pd alloyed nanoparticles, with the highest catalytic performance shown by the Au0.5Pd0.5/TiO2 catalyst.This article is part of a discussion meeting issue ‘Science to enable the circular economy’.
published_date 2020-07-24T20:07:37Z
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score 11.048302

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