期刊
ACS APPLIED NANO MATERIALS
卷 5, 期 10, 页码 15115-15122出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c03283
关键词
nanoporous aromatic frameworks; palladium-containing wastes; rapid palladium extraction; heterogeneous catalysis; sustainable utilization
资金
- National Natural Science Foundation of China [22075040,22131004, U21A20330]
- 111 Project [B18012]
The study demonstrated effective extraction and sustainable utilization of palladium by modifying a cyclic molecule on a nanoporous aromatic framework, showing good adsorption capacity and catalytic activity.
Effective extraction of palladium from secondary resources is a promising solution for the sustainable utilization of precious metals. A cyclic molecule containing four N atoms was modified on a nanoporous aromatic framework (PAF) to give PAF-1-N-4, which provided a meaningful route to introduce bulky molecules with multiple coordination sites into the PAF materials. Through the interaction of multiple binding sites to Pd(II), PAF-1-N-4 showed rapid and deep adsorption of Pd(II) at a low initial concentration. The maximum Pd(II) adsorption capacity of PAF-1-N-4 reached 299.4 mg g(-1), and PAF-1-N-4 reduced the concentration of Pd(II) from 5.35 ppm to 84 ppb within 5 min and finally to 42 ppb within 60 min. After the in situ reduction, the obtained Pd@PAF-1-N-4 exhibited good catalytic activity and reusability for the Suzuki-Miyaura coupling reaction in five-cycle catalytic experiments, thus realizing its sustainable utilization of palladium extracted from secondary resources.
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