Abstract
This work explores different techniques for anchoring Metal-Organic Frameworks (MOFs) to surfaces to develop photo responsive porous materials that can be used in photocatalysis. Surface attachment of MOFs were achieved using a variety of different techniques including electrochemical growth, covalent linkage, and electrophoretic deposition. The Zr(IV) and Ti(IV)-based MOFs UiO-66-NH 2 and MIL-125-NH 2 were anchored onto tetraethyl orthosilicate (TEOS) wafers via covalent attachment using polyaniline (PANI) crosslinking. This resulted in multi-layered, photo responsive glass electrodes that were investigated for photocatalysis. MIL-125-NH2 was also anchored onto the surface of a PANI-functionalized silica wafer using electrophoretic deposition. Electrochemical growth of Cu(II)-based MOFs onto graphite and titanium were also explored using 1,3,5-trimesic acid (BTC) and 1,4-terephthalic acid (BDC) to generate Cu-BTC and Cu-BDC frameworks on the surface. The properties of these electrochemically grown films were relatively easy to manipulate, allowing great control of their composition, thickness, and crystal size. Each functionalized material was characterized using Infrared spectroscopy, powder X-ray diffraction, and SEM imaging with EDS analysis. The photo responsive and photocatalytic properties were explored using different photo and electrochemical techniques including linear sweep voltammetry, cyclic voltammetry, and photovoltage response under simulated sunlight.
Published Version
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