78389-87-4Relevant articles and documents
Graphite diyne film and preparation method and application thereof
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Paragraph 0042, (2021/09/04)
The invention relates to a graphite diyne film as well as a preparation method and application thereof. A precursor of the graphite diyne film is hexa(bromo-ethynyl) benzene. The method comprises the following steps: (1) injecting a solvent into a reactor filled with hexa(bromo-ethynyl) benzene and a copper-containing substrate; (2) dropwise adding an alkali solution into the reactor, stirring under the protection of an inert atmosphere, and carrying out a debromination coupling reaction; and (3) after the reaction is finished, generating a layer of black semitransparent film on the surface of the substrate, washing the surface of the substrate with acetone and N,N-dimethylformamide to obtain a black graphite diyne film which is applied to a catalytic material, an energy material or an electrode material. Compared with the prior art, the preparation method has the advantages that monomer molecules are more stable in air and higher in reaction activity, a coupling reaction can be stably and efficiently carried out, the reaction time is greatly shortened, the reaction can be carried out at room temperature, additional heating is not needed, energy can be greatly saved, and the problem of organic solvent volatilization caused by heating is solved.
Distinctive Improved Synthesis and Application Extensions Graphdiyne for Efficient Photocatalytic Hydrogen Evolution
Li, Yanbing,Yang, Hao,Wang, Guorong,Ma, Bingzhen,Jin, Zhiliang
, p. 1985 - 1995 (2020/02/13)
Graphdiyne (GD), a novel two-dimension carbon hybrid material, due to its unique and excellent properties, has been widely concerned since this innovative material was successfully synthesized by Prof. Yuliang Li in 2010. Traditionally, its synthesis method is growing graphdiyne on copper foils or foam copper as a base catalytic material to deliver copper ions (Cu2+) under pyridine conditions. Here, an innovative progress for graphdiyne preparation approach of using Cu+ ion as a catalytic material is reported and its application in extending to the photocatalytic water-splitting to produce hydrogen in situ as well. In detail, by means of cuprous iodide used as a catalyst-carrier to grow a graphdiyne in a pyridine solution of monomeric hexynylbenzene and such CuI-graphdiyne composite catalyst is directly applied to photocatalytic hydrogen production in situ. Meanwhile, the hydrogen production of GD and CuI are 29.42 μmol/5 h and 156.49 μmol/5 h, respectively. In particular, the composite catalyst GD-CuI exhibits an optimum photo-catalytic hydrogen production activity (465.95 μmol/5 h) which is 15.8 times and 3.0 times that of pure GD and CuI respectively. This rational design, one-step construction of GD-CuI, successfully enhances photo-catalytic hydrogen evolution activity. The deeper characterization study results such as TEM, SEM, XPS, XRD, UV-vis DRS, Transient photocurrent and FT-IR etc. have been well researched and the results of which are in good agreement with each other.
Fluorescent Sulphur- and Nitrogen-Containing Porous Polymers with Tuneable Donor–Acceptor Domains for Light-Driven Hydrogen Evolution
Schwarz, Dana,Acharja, Amitava,Ichangi, Arun,Lyu, Pengbo,Opanasenko, Maksym V.,Go?ler, Fabian R.,K?nig, Tobias A. F.,?ejka, Ji?í,Nachtigall, Petr,Thomas, Arne,Bojdys, Michael J.
supporting information, p. 11916 - 11921 (2018/08/21)
Light-driven water splitting is a potential source of abundant, clean energy, yet efficient charge-separation and size and position of the bandgap in heterogeneous photocatalysts are challenging to predict and design. Synthetic attempts to tune the bandgap of polymer photocatalysts classically rely on variations of the sizes of their π-conjugated domains. However, only donor–acceptor dyads hold the key to prevent undesired electron-hole recombination within the catalyst via efficient charge separation. Building on our previous success in incorporating electron-donating, sulphur-containing linkers and electron-withdrawing, triazine (C3N3) units into porous polymers, we report the synthesis of six visible-light-active, triazine-based polymers with a high heteroatom-content of S and N that photocatalytically generate H2 from water: up to 915 μmol h?1 g?1 with Pt co-catalyst, and—as one of the highest to-date reported values ?200 μmol h?1 g?1 without. The highly modular Sonogashira–Hagihara cross-coupling reaction we employ, enables a systematic study of mixed (S, N, C) and (N, C)-only polymer systems. Our results highlight that photocatalytic water-splitting does not only require an ideal optical bandgap of ≈2.2 eV, but that the choice of donor–acceptor motifs profoundly impacts charge-transfer and catalytic activity.
