Selective and Light-Enhanced Au(III) Recovery by a Porphyrin-Based Metal-Organic Framework: Performance and Underlying Mechanisms

Shu, Yufei; Chen, Yuchao; Han, Qi; Liu, Xun; Liu, Bei; Wang, Zhongying

2023-06-01

10.1021/acsestengg.3c00082

ACS ES&T ENGINEERING   影响因子和分区

2690-0645

Recovering gold from unconventionalsources, such as electronicwaste, offers significant environmental and economic benefits. Exploitingmaterials and methods with high efficiency and selectivity is demanding.Herein, we reported a novel light-enhanced Au(III) recovery processusing a porphyrin-based metal-organic framework (PCN-224).Our results showed that PCN-224 exhibited a remarkable Au(III) recoverycapacity of up to 2613 mg/g when exposed to visible light irradiation,which was 3 times higher than that in the dark. Furthermore, lightirradiation also improved the Au selectivity of PCN-224 against coexistingions, including Zn2+, Mg2+, Cd2+,Ni2+, Hg2+, Cu2+, Pb2+, Al3+, and Fe3+. Based on characterizationand kinetic analysis, an adsorption-reduction mechanism wasproposed for the light-enhanced Au recovery, and porphyrin linkersplayed an essential role as active sites for both adsorption and reduction.To further protect the porphyrin linkers in PCN-224, acetic acid wasintroduced as a representative electron donor molecule in electronicwaste, which could further enhance the Au(III) recovery capacity to4946 mg/g. In addition, we demonstrated that PCN-224 and its light-enhancedfeature also performed effectively in the actual leaching solutionof waste electrical and electronic equipment, and the framework wassuccessfully reused for at least six cycles. Overall, our discoveriescould inspire the design of more outstanding materials and the artfuluse of clean energy to recover precious metals while minimizing theenvironmental impact.

Au recovery visible light porphyrin metal-organic frameworks

ESCI

英语

第一 ; 通讯

National Natural Science Foundation of China[22076075] ; Stable Support Plan Program of Shenzhen Natural Science Fund[20200925155303001]

Engineering

Engineering, Environmental

WOS:001016687800001

AMER CHEMICAL SOC

Web of Science

Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China

Shu, Yufei,Chen, Yuchao,Han, Qi,et al. Selective and Light-Enhanced Au(III) Recovery by a Porphyrin-Based Metal-Organic Framework: Performance and Underlying Mechanisms[J]. ACS ES&T ENGINEERING,2023,3(7).

Shu, Yufei,Chen, Yuchao,Han, Qi,Liu, Xun,Liu, Bei,&Wang, Zhongying.(2023).Selective and Light-Enhanced Au(III) Recovery by a Porphyrin-Based Metal-Organic Framework: Performance and Underlying Mechanisms.ACS ES&T ENGINEERING,3(7).

Shu, Yufei,et al."Selective and Light-Enhanced Au(III) Recovery by a Porphyrin-Based Metal-Organic Framework: Performance and Underlying Mechanisms".ACS ES&T ENGINEERING 3.7(2023).