Issue 19, 2019

Tunable titanium metal–organic frameworks with infinite 1D Ti–O rods for efficient visible-light-driven photocatalytic H2 evolution

Abstract

Infinite 1D Ti–O rod-based metal–organic frameworks (MOFs) are promising photocatalysts for water splitting due to their high optical response and favourable photo-redox properties and stability, but have not been explored yet. In this study, three isoreticular porous 1D rod-based Ti-MOFs ZSTU-1, ZSTU-2 and ZSTU-3 are successfully constructed from infinite [Ti63-O)62-OH)6]n secondary building units (SBUs) and tritopic carboxylate linkers 4,4′,4′′-nitrilotribenzoic acid (H3TCA), 1,3,5-tris(4-carboxyphenyl)benzene (H3BTB) and tris(4′-carboxybiphenyl)amine (H3BTCA), respectively. Their porosities systematically increase with the larger and longer organic linkers. The two MOFs ZSTU-1 and ZSTU-3 built from the triphenylamino-based ligands can absorb visible light, exhibiting much better photocatalytic performance than ZSTU-2 as shown by the H2 production rate of ZSTU-1 and ZSTU-3 being 3–4 times higher than that of ZSTU-2. The photocatalytic H2 production rates for ZSTU-1, ZSTU-2, and ZSTU-3 are 1060 μmol g−1 h−1, 350 μmol g−1 h−1 and 1350 μmol g−1 h−1, respectively. The extraordinary photocatalytic activity of ZSTU-3 is attributed to its visible light absorption, large surface area, and favorable charge separation.

Graphical abstract: Tunable titanium metal–organic frameworks with infinite 1D Ti–O rods for efficient visible-light-driven photocatalytic H2 evolution

Supplementary files

Article information

Article type
Paper
Submitted
20 feb. 2019
Accepted
13 apr. 2019
First published
13 apr. 2019

J. Mater. Chem. A, 2019,7, 11928-11933

Tunable titanium metal–organic frameworks with infinite 1D Ti–O rods for efficient visible-light-driven photocatalytic H2 evolution

C. Li, H. Xu, J. Gao, W. Du, L. Shangguan, X. Zhang, R. Lin, H. Wu, W. Zhou, X. Liu, J. Yao and B. Chen, J. Mater. Chem. A, 2019, 7, 11928 DOI: 10.1039/C9TA01942A

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