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      One-step preparation of iodine-doped graphitic carbon nitride nanosheets as efficient photocatalysts for visible light water splitting

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          Abstract

          A highly efficient visible-light-driven photocatalyst based on iodinated graphitic carbon nitride nanosheets (IGCNSs) has been prepared by facilely ball-milling graphitic carbon nitride (GCN) in the presence of iodine.

          Abstract

          Here, a highly efficient visible-light-driven photocatalyst based on iodinated graphitic carbon nitride nanosheets (IGCNSs) has been prepared by facilely ball-milling graphitic carbon nitride (GCN) in the presence of iodine. With an iodine atomic content of 0.34 at%, the optimized IGCNSs sample shows a high H 2-production rate of 44.5 μmol h −1 under visible light illumination.

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          Graphene-Like Carbon Nitride Nanosheets for Improved Photocatalytic Activities

          Lili Zhang, Gang Liu, Hui-Ming Cheng … (2012)
          Article 0 comments Cited 843 times – based on 0 reviews     Review now
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            Highly efficient visible-light-driven photocatalytic hydrogen production of CdS-cluster-decorated graphene nanosheets.

            Qin Li, Beidou Guo, Jiaguo Yu … (2011)
            The production of clean and renewable hydrogen through water splitting using photocatalysts has received much attention due to the increasing global energy crises. In this study, a high efficiency of the photocatalytic H(2) production was achieved using graphene nanosheets decorated with CdS clusters as visible-light-driven photocatalysts. The materials were prepared by a solvothermal method in which graphene oxide (GO) served as the support and cadmium acetate (Cd(Ac)(2)) as the CdS precursor. These nanosized composites reach a high H(2)-production rate of 1.12 mmol h(-1) (about 4.87 times higher than that of pure CdS nanoparticles) at graphene content of 1.0 wt % and Pt 0.5 wt % under visible-light irradiation and an apparent quantum efficiency (QE) of 22.5% at wavelength of 420 nm. This high photocatalytic H(2)-production activity is attributed predominantly to the presence of graphene, which serves as an electron collector and transporter to efficiently lengthen the lifetime of the photogenerated charge carriers from CdS nanoparticles. This work highlights the potential application of graphene-based materials in the field of energy conversion.
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              Phosphorus-doped carbon nitride solid: enhanced electrical conductivity and photocurrent generation.

              Yuanjian Zhang, Toshiyuki Mori, Jinhua Ye … (2010)
              As a new kind of polymeric semiconductors, graphitic carbon nitride (g-C(3)N(4)) and its incompletely condensed precursors are stable up to 550 degrees C in air and have shown promising photovoltaic applications. However, for practical applications, their efficiency, limited e.g. by band gap absorption, needs further improvement. Here we report a "structural doping" strategy, in which phosphorus heteroatoms were doped into g-C(3)N(4) via carbon sites by polycondensation of the mixture of the carbon nitride precursors and phosphorus source (specifically from 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid). Most of the structural features of g-C(3)N(4) were well retained after doping, but electronic features had been seriously altered, which provided not only a much better electrical (dark) conductivity up to 4 orders of magnitude but also an improvement in photocurrent generation by a factor of up to 5. In addition to being active layers in solar cells, such phosphorus-containing scaffolds and materials are also interesting for polymeric batteries as well as for catalysis and as catalytic supports.
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                Author and article information

                Journal
                Journal ID (publisher-id): JMCAET
                Title: Journal of Materials Chemistry A
                Abbreviated Title: J. Mater. Chem. A
                Publisher: Royal Society of Chemistry (RSC)
                ISSN (Print): 2050-7488
                ISSN (Electronic): 2050-7496
                Publication date Created: 2015
                Publication date (Print): 2015
                Volume: 3
                Issue: 8
                Pages: 4612-4619
                Article
                DOI: 10.1039/C4TA06093H
                SO-VID: 1b16fde4-0244-4558-9259-b0825ea23079
                Copyright © © 2015
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