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A reaction cell for time-resolved in situ XAS studies during wet chemical synthesis : the Cu2(OH)3Cl case

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A reaction cell for time-resolved in situ XAS studies during wet chemical synthesis : the Cu2(OH)3Cl case

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Título A reaction cell for time-resolved in situ XAS studies during wet chemical synthesis : the Cu2(OH)3Cl case
Autor Boita, Jocenir
Alves, Maria do Carmo Martins
Morais, Jonder
Abstract The use of in situ time-resolved dispersive X-ray absorption spectroscopy (DXAS) to monitor the formation of Cu2(OH)3Cl particles in an aqueous solution is reported. The measurements were performed using a dedicated reaction cell, which enabled the evolution of the Cu K-edge X-ray absorption near-edge spectroscopy to be followed during mild chemical synthesis. The formed Cu2(OH)3Cl particles were also characterized by synchrotron-radiationexcited X-ray photoelectron spectroscopy, X-ray diffraction and scanning electron microscopy. The influence of polyvinylpyrrolidone (PVP) on the electronic and structural properties of the formed particles was investigated. The results indicate clearly the formation of Cu2(OH)3Cl, with or without the use of PVP, which presents very similar crystalline structures in the long-range order. However, depending on the reaction, dramatic differences were observed by in situ DXAS in the vicinities of the Cu atoms.
Contido em Journal of synchrotron radiation. Copenhagen. Vol. 21, no. 1 (Jan. 2014), p. 254-258
Assunto Compostos de cobre
Espectroscopia de raio x
[en] Copper
[en] Cu2(OH)3Cl
[en] DXAS
[en] In situ
[en] X-ray absorption
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/94438
Arquivos Descrição Formato
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