GO@β-Ag 2 MoO 4 Composite: One-Step Synthesis, Characterization, and Photocatalytic Performance against RhB Dye.

Autor:	da Silva PHA; Departamento de Química, Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro, 69020-120 Manaus, AM, Brazil., de Souza DA; Departamento de Química, Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro, 69020-120 Manaus, AM, Brazil., Filho RLF; Departamento de Química, ICEX, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil., Teixeira APC; Departamento de Química, ICEX, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil., Lago RM; Departamento de Química, ICEX, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil., Brito WR; LABEL - Laboratory of Bioelectronic and Electroanalytic, Central Analytical Lab, Federal University of Amazonas (UFAM), 69077-000 Manaus, AM, Brazil., Araújo Junior EA; Laboratório Interdisciplinar de Materiais Avançados (LIMAV), Universidade Federal do Piauí (UFPI), 64049-550 Teresina, PI, Brazil., Takeno LL; Departamento Acadêmico de Infraestrutura - DAINFRA, Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro, 69020-120 Manaus, AM, Brazil., Morais FS; Departamento de Química, Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro, 69020-120 Manaus, AM, Brazil., Nascimento JFL; Laboratório de Ensaios Mecânicos, Automação e Simulação (LEMAS), Polo de Inovação (INOVA), Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), 69075-351 Manaus, AM, Brazil., Leyet Ruiz Y; Laboratório de Processamento de Materiais (LPMat), Centro de Ciências Exatas, Universidade Federal do Amazonas, 69077-000 Manaus, AM, Brazil., Saraiva LB; Departamento de Química, Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro, 69020-120 Manaus, AM, Brazil., Nobre FX; Departamento de Química, Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro, 69020-120 Manaus, AM, Brazil.; Laboratório de Ensaios Mecânicos, Automação e Simulação (LEMAS), Polo de Inovação (INOVA), Instituto Federal de Educação Ciência e Tecnologia do Amazonas (IFAM), 69075-351 Manaus, AM, Brazil.
Jazyk:	angličtina
Zdroj:	ACS physical chemistry Au [ACS Phys Chem Au] 2024 Sep 10; Vol. 4 (6), pp. 632-646. Date of Electronic Publication: 2024 Sep 10 (Print Publication: 2024).
DOI:	10.1021/acsphyschemau.4c00038
Abstrakt:	The combination of materials to improve properties of interest has become one of the strategies widely used for numerous applications, including new catalysts, over the last few decades. In this study, silver molybdate (β-Ag 2 MoO 4 ) microcrystals were efficiently obtained by the hydrothermal method, obtaining composites with different amounts of graphene oxide (GO) (1, 2.5, 5, 7.5, and 10%, w/w) using the conventional hydrothermal method. The incorporation of GO on silver molybdate was confirmed by X-ray diffraction (XRD) and Raman spectroscopy, where the vibrational modes and crystallographic planes characteristic of the materials of interest were highlighted. The images collected by scanning electron microscopy (SEM) revealed the occurrence of plate-shaped structures (shells) anchored to the surface of the silver molybdate microcrystals (core). The optical properties showed that the materials presented E gap between 3.34 and 3.39 eV, where the sample with 7.5% of GO (GO@β-AgMo_7.5) was the one that presented energy for the conduction band, largely favorable to the formation of superoxide radicals through the photoexcitation process of electrons. The catalytic tests demonstrated that, among the samples obtained in this study, the sample with 7.5% of GO (GO@β-AgMo_7.5) exhibits superior photocatalytic performance against the dye rhodamine B (RhB) in an aqueous medium. Thus, the kinetics constant for photolysis (absence of catalysts) and for the sample β-AgMo and the sample with 7.5% of GO (GO@β-AgMo_7.5) are 0.38 × 10 -3 , 12 × 10 -3 , and 23.72 × 10 -3 min -1 , respectively. Therefore, it is 62.5 times more efficient in the degradation of the RhB dye, which confirms the promising photocatalytic properties of the obtained composite. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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