title: A reaction cell for time-resolved in situ XAS studies during wet chemical synthesis: the Cu2(OH)3Cl case.
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-radiation-excited 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.
authors.affiliation: Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 9500, Bairro Agronomia, CP 15051, CEP 91501-970, Porto Alegre, RS, Brazil.
authors.forename: Jocenir
authors.initials: J
authors.lastname: Boita
authors.affiliation: Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 9500, Bairro Agronomia, CP 15003, CEP 91501-970, Porto Alegre, RS, Brazil.
authors.forename: Maria do Carmo Martins
authors.initials: Mdo C
authors.lastname: Alves
authors.affiliation: Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 9500, Bairro Agronomia, CP 15051, CEP 91501-970, Porto Alegre, RS, Brazil.
authors.forename: Jonder
authors.initials: J
authors.lastname: Morais
keywords: Cu2(OH)3Cl; DXAS; X-ray absorption; copper; in situ