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Tunable titanium metal–organic frameworks with infinite 1D Ti–O rods for efficient visible-light-driven photocatalytic H2 evolution.
- Source :
- Journal of Materials Chemistry A; 5/21/2019, Vol. 7 Issue 19, p11928-11933, 6p
- Publication Year :
- 2019
-
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 [Ti<subscript>6</subscript>(μ<subscript>3</subscript>-O)<subscript>6</subscript>(μ<subscript>2</subscript>-OH)<subscript>6</subscript>]<subscript>n</subscript> secondary building units (SBUs) and tritopic carboxylate linkers 4,4′,4′′-nitrilotribenzoic acid (H<subscript>3</subscript>TCA), 1,3,5-tris(4-carboxyphenyl)benzene (H<subscript>3</subscript>BTB) and tris(4′-carboxybiphenyl)amine (H<subscript>3</subscript>BTCA), 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 H<subscript>2</subscript> production rate of ZSTU-1 and ZSTU-3 being 3–4 times higher than that of ZSTU-2. The photocatalytic H<subscript>2</subscript> production rates for ZSTU-1, ZSTU-2, and ZSTU-3 are 1060 μmol g<superscript>−1</superscript> h<superscript>−1</superscript>, 350 μmol g<superscript>−1</superscript> h<superscript>−1</superscript> and 1350 μmol g<superscript>−1</superscript> h<superscript>−1</superscript>, respectively. The extraordinary photocatalytic activity of ZSTU-3 is attributed to its visible light absorption, large surface area, and favorable charge separation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 7
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 136481475
- Full Text :
- https://doi.org/10.1039/c9ta01942a