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Issue 28, 2017
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Comparison studies of hybrid lead halide [MPb2X7]2− (M = Cu, Ag; X = Br, I) chains: band structures and visible light driven photocatalytic properties

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Abstract

By using transition-metal (TM) complex cationic dyes as structure-directing agents and photosensitizers, a series of inorganic–organic hybrid metal halides, namely, [TM(2,2′-bipy)3]AgPb2I7 [TM = Ni (1), Co (2) and Zn (3)], [Co(2,2′-bipy)3]CuPb2Br7 (4) and [TM(2,2′-bipy)3]AgPb2Br7 [TM = Ni (5) and Fe (6)], have been solvothermally prepared and structurally characterized. Compounds 1–3 feature 1D [AgPb2I7]2− chains built from the condensation of [Ag2I6] dimers and [Pb4I14] tetramers, and compounds 4, 5 and 6 contain similar 1D [CuPb2Br7]2− and [AgPb2Br7]2− chains, respectively. UV-Vis diffuse reflectance measurements reveal narrow band gaps of 1.75–2.18 eV for compounds 1–6, which lead to efficient and stable photocatalytic degradation activities over organic pollutants under visible light irradiation. Among the title compounds, sample 5 shows the highest photocatalytic degradation activity. The possible mechanism for their stable photocatalytic activities is proposed based on the experimental and theoretical studies.

Graphical abstract: Comparison studies of hybrid lead halide [MPb2X7]2− (M = Cu, Ag; X = Br, I) chains: band structures and visible light driven photocatalytic properties

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Publication details

The article was received on 07 Mar 2017, accepted on 16 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT00820A
Citation: Dalton Trans., 2017,46, 9235-9244
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    Comparison studies of hybrid lead halide [MPb2X7]2− (M = Cu, Ag; X = Br, I) chains: band structures and visible light driven photocatalytic properties

    C. Yue, X. Lei, X. Lu, Y. Li, J. Wei, W. Wang, Y. Yin and N. Wang, Dalton Trans., 2017, 46, 9235
    DOI: 10.1039/C7DT00820A

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