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      UV-light modulated Ti3C2Tx MXene/g-C3N4 heterojunction film for electromagnetic interference shielding

      , , , , ,
      Composites Part A: Applied Science and Manufacturing
      Elsevier BV

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          A metal-free polymeric photocatalyst for hydrogen production from water under visible light.

          The production of hydrogen from water using a catalyst and solar energy is an ideal future energy source, independent of fossil reserves. For an economical use of water and solar energy, catalysts that are sufficiently efficient, stable, inexpensive and capable of harvesting light are required. Here, we show that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor. Contrary to other conducting polymer semiconductors, carbon nitride is chemically and thermally stable and does not rely on complicated device manufacturing. The results represent an important first step towards photosynthesis in general where artificial conjugated polymer semiconductors can be used as energy transducers.
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            Electromagnetic interference shielding with 2D transition metal carbides (MXenes)

            Materials with good flexibility and high conductivity that can provide electromagnetic interference (EMI) shielding with minimal thickness are highly desirable, especially if they can be easily processed into films. Two-dimensional metal carbides and nitrides, known as MXenes, combine metallic conductivity and hydrophilic surfaces. Here, we demonstrate the potential of several MXenes and their polymer composites for EMI shielding. A 45-micrometer-thick Ti3C2Tx film exhibited EMI shielding effectiveness of 92 decibels (>50 decibels for a 2.5-micrometer film), which is the highest among synthetic materials of comparable thickness produced to date. This performance originates from the excellent electrical conductivity of Ti3C2Tx films (4600 Siemens per centimeter) and multiple internal reflections from Ti3C2Tx flakes in free-standing films. The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.
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              Graphene-Like Carbon Nitride Nanosheets for Improved Photocatalytic Activities

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                Author and article information

                Contributors
                Journal
                Composites Part A: Applied Science and Manufacturing
                Composites Part A: Applied Science and Manufacturing
                Elsevier BV
                1359835X
                July 2020
                July 2020
                : 134
                : 105899
                Article
                10.1016/j.compositesa.2020.105899
                830dcebe-038f-4c27-8294-cf7844c3bd8b
                © 2020

                https://www.elsevier.com/tdm/userlicense/1.0/

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