Fabrication of 2D Metal–Organic Framework Nanosheets with Highly Colloidal Stability and High Yield through Coordination Modulation

• Published in: ACS applied materials & interfaces Vol. 13; no. 33; pp. 39755 - 39762
• Main Authors: Zhou, Huazhang, Zhang, Liying, Wang, Guizhou, Zhang, Yichi, Wang, Xuanhe, Li, Mengchu, Fan, Fuqiang, Li, Yunong, Wang, Tieqiang, Zhang, Xuemin, Fu, Yu
• Format: Journal Article
• Language: English
• Published: American Chemical Society 25.08.2021
• Subjects: ambient temperature; anisotropy; carbon dioxide; coordination polymers; crystal structure; cycloaddition reactions; Functional Nanostructured Materials (including low-D carbon); nanosheets; porosity; colloidal suspension; high yield; coordination modulation; metal−organic frameworks; 2D materials
• ISSN: 1944-8244; 1944-8252; 1944-8252
• DOI: 10.1021/acsami.1c11373

2D metal–organic frameworks (MOFs) are promising 2D materials with a wide range of applications due to their unique physical and chemical properties. However, 2D MOFs are prone to stacking due to their ultrathin thickness, and the high-yield preparation method of 2D MOFs is highly demanded. In this work, a rapid and scalable method is novelistically presented to prepare 2D MOFs with highly colloidal stability and high yield through coordination modulation at room temperature. A well-ordered CuBDC-MBA nanosheet (BDC, 1,4-benzenedicarboxylic; MBA, 4-methoxybenzoic acid) fabricated by introducing MBA as a modulator exhibits extremely stable colloid suspension for 6 months and the yield of well-dispersed CuBDC-MBA is higher than 88.6%. As MBA successfully participates in synthetic coordination of CuBDC-MBA and is presumably installed on the edge of 2D MOFs with low MBA content due to anisotropic growth, CuBDC-MBA and CuBDC are similar with respect to nanosheet morphology, integrated crystal structure, and porosity. Moreover, well-dispersed CuBDC-MBA shows higher catalytic effectiveness for the cycloaddition reaction of CO2 with 1.5 times higher yield than CuBDC. Thus, this method can provide a new idea based on coordination modulation to directly fabricate 2D MOFs with purposeful properties.