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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

Abstract

A series of inorganic-organic hybrid lead halogenides by using transitional-metal (TM) complex cationic dyes as structure-directing agents and photosensitizers, 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)], respectively, have been solvothermally prepared and structurally characterized. Compounds 1-3 feature the 1D [AgPb2I7]2– chains built from the condensation of [Ag2I6] dimers and [Pb4I14] tetramers, and compounds 4 and 5-6 contain the similar 1D [CuPb2Br7]2– and [AgPb2Br7]2– chains, respectively. The UV-vis diffuse reflectance measurements reveal narrow band gaps of 1.75–2.18 eV for compounds 1-6, which lead to the 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 also proposed based on the experimental and theoretical studies.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C7DT00820A

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