Jung, Youngkyun Seok, Shi-Hyun Jung, Kyung-Won Park, Jaeeun Kwon, Soon-Yong Choi, Jae-Woo 2024-01-19T08:31:01Z 2024-01-19T08:31:01Z 2023-08-17 2023-11 1613-6810 https://pubs.kist.re.kr/handle/201004/113157 The development of efficient adsorbents for the practical recovery of precious metals from electronic waste is vital to advanced energy/environment industries. Ti3C2Tx MXene-based materials are promising adsorbents for aqueous environments; however, the highly defective and super hydrophilic nature of the MXene surface hinders its practical applications. Here, we report that nitrogen-doped MXene (N-MXene) nanosheet stacks, prepared via high-energy planetary ball milling under N-2 purging, exhibited a long-term stable and excellent recovery capability for Au and Ag ions via the nitrogenation of defective vacancies. Notably, these microscale nanosheets could facilitate the sustainable production of Au and Ag from secondary sources, exhibiting a high recovery rate and capability (1198 mg g(-1) for Au and 1528 mg g(-1) for Ag), long-term stable storability (21 d), and high selectivity (K-d of 1.67 x 10(6) for Au and 2.07 x 10(7) for Ag). Furthermore, the reversible redox chemistry of N-MXene facilitated its repeated use in adsorption/desorption cycles. English Wiley - V C H Verlag GmbbH & Co. Nitrogen-Doped Titanium Carbide (Ti3C2Tx) MXene Nanosheet Stack For Long-Term Stability and Efficacy in Au and Ag Recovery Article 10.1002/smll.202305247 1 Small, v.19, no.48 Small 19 48 Y scie scopus 001039339700001 2-s2.0-85166218693 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article GOLD ADSORPTION METALS MECHANISM REMOVAL SURFACE highly selective recovery long-term oxidation stability nanosheet stack nitrogen-doped MXene precious metals reversible redox interaction