The present article describes the hydrogen production
from an aqueous
medium over amino-functionalized Ti(IV) metal–organic framework
(Ti-MOF-NH2) under visible-light irradiation. Ti-MOF-NH2, which employs 2-amino-benzenedicarboxylic acid as an organic
linker, has been synthesized by a facile solvothermal method. Pt nanoparticles
as cocatalysts are then deposited onto Ti-MOF-NH2 via a
photodeposition process (Pt/Ti-MOF-NH2). The XRD and N2 adsorption measurements reveal the successful formation of
a MOF framework structure and its remaining structure after deposition
of Pt nanoparticles. The observable visible-light absorption up to
∼500 nm can be seen in the DRUV–vis spectrum of Ti-MOF-NH2, which is associated with the chromophore in the organic
linker. Ti-MOF-NH2 and Pt/Ti-MOF-NH2 exhibit
efficient photocatalytic activities for hydrogen production from an
aqueous solution containing triethanolamine as a sacrificial electron
donor under visible-light irradiation. The longest wavelength available
for the reaction is 500 nm. The results obtained from wavelength-dependent
photocatalytic tests and photocurrent measurements as well as in situ
ESR measurements demonstrate that the reaction proceeds through the
light absorption by its organic linker and the following electron
transfer to the catalytically active titanium-oxo cluster.
A Ru complex-incorporated Ti-based MOF (Ti-MOF-Ru(tpy)2) has been synthesised by using a bis(4'-(4-carboxyphenyl)-terpyridine)Ru(ii) complex (Ru(tpy)2) as an organic linker. Ti-MOF-Ru(tpy)2 promotes photocatalytic hydrogen production from water containing a sacrificial electron donor under visible-light irradiation up to 620 nm.
The present perspective describes recent advances in visible-light-responsive photocatalysts intended to develop novel and efficient solar energy conversion technologies, including water splitting and photofuel cells. Water splitting is recognized as one of the most promising techniques to convert solar energy as a clean and abundant energy resource into chemical energy in the form of hydrogen. In recent years, increasing concern is directed to not only the development of new photocatalytic materials but also the importance of technologies to produce hydrogen and oxygen separately. Photofuel cells can convert solar energy into electrical energy by decomposing bio-related compounds and livestock waste as fuels. The advances of photocatalysts enabling these solar energy conversion technologies have been going on since the discovery of semiconducting titanium dioxide materials and have extended to organic-inorganic hybrid materials, such as metal-organic frameworks and porous coordination polymers (MOF/PCP).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.