期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 533, 期 -, 页码 9-12出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.08.049
关键词
Ti-based MOFs; Enhancing the stability in water; Metal cations with empty or partially-filled; d orbitals
资金
- National Natural Science Foundation of China [21333006, 21573135, 11374190, 51321091, 51602179]
- Taishan Scholar Foundation of Shandong Province, China
- Young Scholars Program [2016WLJH16]
Though titanium-based metal-organic frameworks (MOFs) are declared to be relatively water stable, their framework gradually collapses in water within days due to the attack of OH- to O-Ti-O bond. For practical applications of titanium-based MOFs, it is crucial to solve their instability problem in water. We searched for a simple and efficient method to enhance the stability of titanium-based MOFs in water by using Ti-ATA (ATA = 2-aminoterephthallate ion) as a representative titanium-based MOF. Here, we show that the stability of Ti-ATA in water is greatly improved nearly without affecting its porosity and photocatalytic activity by treating it with aqueous solutions containing metal ions of empty d orbitals (Y3(+), La3+, Ce3+, Nd3+ and Tm3+) or partially-filled d orbitals (Cr3(+)). (C) 2018 Published by Elsevier Inc.
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