Solar-assisted selective separation and recovery of precious group metals from deactivated air purification catalysts

Meijun Wu ¹Yao Chen ²Zhenpeng Guo ¹Xinru Wang ¹Hanyun Zhang ³Ting Zhang ¹Shuhui Guan ¹Zhenfeng Bian¹

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作者信息

1. Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials,Shanghai Normal University,Shanghai 200234,China
2. Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials,Shanghai Normal University,Shanghai 200234,China;Department of Chemistry,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Fudan University,Shanghai 200438,China
3. Shanghai YK Pao School,Shanghai 201620,China
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Abstract

The mitigation of environmental and energy crises could be advanced by reclaiming platinum group pre-cious metals(PGMs)from decommissioned air purification catalysts.However,the complexity of catalyst composition and the high chemical inertness of PGMs significantly impede this process.Consequently,recovering PGMs from used industrial catalysts is crucial and challenging.This study delves into an envi-ronmentally friendly approach to selectively recover PGMs from commercial air purifiers using photocat-alytic redox technology.Our investigation focuses on devising a comprehensive strategy for treating three-way catalysts employed in automotive exhaust treatment.By meticulously pretreating and modi-fying reaction conditions,we achieved noteworthy results,completely dissolving and separating rhodium(Rh),palladium(Pd),and platinum(Pt)within a 12-h time frame.Importantly,the solubility selectivity persists despite the remarkably similar physicochemical properties of Rh,Pd,and Pt.To bolster the envi-ronmental sustainability of our method,we harness sunlight as the energy source to activate the photo-catalysts,facilitating the complete dissolution of precious metals under natural light irradiation.This eco-friendly recovery approach demonstrated on commercial air purifiers,exhibits promise for broader appli-cation to a diverse range of deactivated air purification catalysts,potentially enabling implementation on a large scale.

Key words

Photocatalysis/Air purification catalysts/Platinum group precious metals/Selective recovery

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基金项目

National Key Research and Development Program of China(2020YFA0211004)

National Natural Science Foundation of China(22176128)

National Natural Science Foundation of China(22236005)

Innovation Program of Shanghai Municipal Education Commission(2023ZKZD50)

Program of Shanghai Academic Research Leader(21XD1422800)

Shanghai Government(22dz1 205400)

Shanghai Government(23520711100)

Chinese Education Ministry Key Laboratory and International Joint Laboratory on Resource Chemistry()

Shanghai Eastern Scholar Program()

the"111 Innovation and Talent Recruitment Base on Photochemical and Energy Materials"(D18020)

Shanghai Engineering Research Center of Green Energy Chemical Engineering(18DZ2254200)

Shanghai Frontiers Science Center of Biomimetic Catalysis()

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

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