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      Conjugated porous polymers for photocatalytic applications

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          Abstract

          Conjugated porous polymers (CPPs), a class of fully crosslinked polymers, as heterogeneous photocatalysts are reviewed revealing a wide range of chemical transformations including hydrogen production, organic synthesis and photopolymerization.

          Abstract

          Conjugated porous polymers (CPPs) are a class of fully crosslinked polymers defined by high surface area and porosity in the nanometer range, having been traditionally developed for applications such as gas storage, sensing and (photo)catalysis. As these materials are comprised of extended π-conjugation, their ability to act as light harvesters, and in turn photocatalysts, has come to prominence. The insoluble nature of CPPs allows them to be employed as photocatalysts under heterogeneous conditions, replacing traditional homogeneous systems. This Perspective highlights the current state-of-the-art CPPs along with a view to their applications as heterogeneous photocatalysts for a wide range of chemical transformations including hydrogen production, organic synthesis and photopolymerization, just to name but a few.

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          Engineering heterogeneous semiconductors for solar water splitting

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            g-C3N4-Based Photocatalysts for Hydrogen Generation.

            Graphitic carbon nitride (g-C3N4)-based photocatalysts have attracted dramatically increasing interest in the area of visible-light-induced photocatalytic hydrogen generation due to the unique electronic band structure and high thermal and chemical stability of g-C3N4. This Perspective summarizes the recent significant advances on designing high-performance g-C3N4-based photocatalysts for hydrogen generation under visible-light irradiation. The rational strategies such as nanostructure design, band gap engineering, dye sensitization, and heterojunction construction are described. Finally, this Perspective highlights the ongoing challenges and opportunities for the future development of g-C3N4-based photocatalysts in the exciting research area.
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              Tunable Organic Photocatalysts for Visible-Light-Driven Hydrogen Evolution

              Photocatalytic hydrogen production from water offers an abundant, clean fuel source, but it is challenging to produce photocatalysts that use the solar spectrum effectively. Many hydrogen-evolving photocatalysts are active in the ultraviolet range, but ultraviolet light accounts for only 3% of the energy available in the solar spectrum at ground level. Solid-state crystalline photocatalysts have light absorption profiles that are a discrete function of their crystalline phase and that are not always tunable. Here, we prepare a series of amorphous, microporous organic polymers with exquisite synthetic control over the optical gap in the range 1.94-2.95 eV. Specific monomer compositions give polymers that are robust and effective photocatalysts for the evolution of hydrogen from water in the presence of a sacrificial electron donor, without the apparent need for an added metal cocatalyst. Remarkably, unlike other organic systems, the best performing polymer is only photoactive under visible rather than ultraviolet irradiation.
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                Author and article information

                Journal
                JMCAET
                Journal of Materials Chemistry A
                J. Mater. Chem. A
                Royal Society of Chemistry (RSC)
                2050-7488
                2050-7496
                2016
                2016
                : 4
                : 48
                : 18677-18686
                Affiliations
                [1 ]Department of Biology and Chemistry
                [2 ]City University of Hong Kong
                [3 ]Kowloon
                [4 ]Hong Kong
                [5 ]School of Engineering and Physical Sciences
                [6 ]Heriot Watt University
                [7 ]Edinburgh
                [8 ]UK
                Article
                10.1039/C6TA07697A
                92aeb4f5-a08a-4cfe-a6c1-9fccad09a4bb
                © 2016
                History

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