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Ferreira ANC, Ferreira WC, Duarte AV, Santos CC, Freire PTC, Luz-Lima C, Moura JVB. In situ high-temperature Raman scattering study of monoclinic Ag 2Mo 2O 7 microrods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 295:122632. [PMID: 36958242 DOI: 10.1016/j.saa.2023.122632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 03/10/2023] [Accepted: 03/13/2023] [Indexed: 06/18/2023]
Abstract
In this work, we present a temperature-dependent behavior of monoclinic silver dimolybdate (m-Ag2Mo2O7) microrods using in situ Raman scattering. The m-Ag2Mo2O7 microrods were obtained by the conventional hydrothermal method at 423 K for 24 h. The structural and morphological characterization of the sample has been done by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Temperature-dependent Raman scattering measurements were performed on m-Ag2Mo2O7 microrods, and the results show an irreversible first-order structural phase transition at 698 K-723 K and the melting process at 773 K. Changes in the Raman spectra confirm the phase transition from the P21/c monoclinic structure to the P-1 triclinic structure. No morphological changes were observed during the structural phase transition of the sample at 723 K. Time-dependent optical microscopy at 773 K showed the growth of nanowires on the Ag2Mo2O7 microrods in the triclinic structure.
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Affiliation(s)
- A N C Ferreira
- Departamento de Física, Centro de Ciências Exatas e Tecnologia, Universidade Federal do Maranhão, CEP 65080-80, São Luís, MA, Brazil
| | - W C Ferreira
- Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138, USA
| | - A V Duarte
- Laboratório de Caracterização de Materiais, Centro de Ciências e Tecnologia, Universidade Federal do Cariri, CEP 63048-080, Juazeiro do Norte, CE, Brazil
| | - C C Santos
- Departamento de Física, Centro de Ciências Exatas e Tecnologia, Universidade Federal do Maranhão, CEP 65080-80, São Luís, MA, Brazil
| | - P T C Freire
- Departamento de Física, Campus do Pici, Universidade Federal do Ceará, CEP 60455-760, Fortaleza, CE, Brazil
| | - C Luz-Lima
- Departamento de Física, Campus Ministro Petrônio Portella, Universidade Federal do Piauí, CEP 64049-550, Teresina, PI, Brazil
| | - J V B Moura
- Departamento de Física, Centro de Ciências Exatas e Tecnologia, Universidade Federal do Maranhão, CEP 65080-80, São Luís, MA, Brazil.
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del-Mazo-Barbara L, Ginebra MP. Rheological characterisation of ceramic inks for 3D direct ink writing: A review. Ann Ital Chir 2021. [DOI: 10.1016/j.jeurceramsoc.2021.08.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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