Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4

被引：10

作者：

Penha, M. D. ^{[1
]}

Gouveia, A. F. ^{[2
]}

Teixeira, M. M. ^{[1
]}

de Oliveira, R. C. ^{[3
]}

Assis, M. ^{[1
]}

Sambrano, J. R. ^{[3
]}

Yokaichya, F. ^{[4
]}

Santos, C. C. ^{[1
]}

Goncalves, R. F. ^{[5
]}

Li, M. Siu ^{[6
]}

San-Miguel, M. A. ^{[2
]}

Andres, J. ^{[7
]}

Longo, E. ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, CDMF, POB 676, BR-13565905 Sao Carlos, Brazil

[2] Univ Estadual Campinas, Inst Chem, UNICAMP, BR-13083970 Campinas, SP, Brazil

[3] Sao Paulo State Univ, UNESP, Modeling & Mol Simulat Grp, Bauru, SP, Brazil

[4] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany

[5] Fed Univ Catalao, SetorUniv, UFCat, BR-75704020 Catalao, Brazil

[6] Univ Sao Paulo, IFSC, POB 369, BR-13560970 Sao Carlos, Brazil

[7] Univ Jaume 1, Dept Analyt & Phys Chem, Castellon de La Plana 12071, Spain

来源：

MATERIALS RESEARCH BULLETIN | 2020年 / 132卷

基金：

巴西圣保罗研究基金会;

关键词：

inorganic compounds; optical properties; neutron diffraction; catalytic properties; ASSISTED HYDROTHERMAL SYNTHESIS; PHOTOLUMINESCENCE PROPERTIES; ALPHA-AG2WO4; MICROCRYSTALS; THIN-FILMS; MOLYBDATE; NANORODS; AG; GROWTH; MO; ELECTRODEPOSITION;

D O I：

10.1016/j.materresbull.2020.111011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article describes the synthesis of alpha-Ag2W0.75Mo0.25O4 using a coprecipitation method followed by microwave irradiation for different times. The samples were characterized using X-ray and neutron diffractions with Rietveld refinement, Raman spectroscopy, X-ray fluorescence, and ultraviolet-visible diffused reflectance spectroscopy, as well as by photoluminescence emissions. To complement and rationalize the experimental results, first-principles calculations were performed. The formation and growth of metallic Ag nanoparticles on the surfaces of alpha-Ag2W0.75Mo0.25O4 were studied by transmission electron microscopy and energy dispersive X-ray spectroscopy. Results show that alpha-Ag2WO4/beta-Ag2MoO4 samples obtained correspond to alpha-Ag2W0.75Mo0.25O4 heterostructure, and the posterior microwave irradiation favors the process of substituting W by Mo, with subsequent formation of a solid solution. Photocatalytic tests were performed to verify the photocatalytic efficiency against the Rhodamine B. Photoluminescence emissions and photocatalytic results showed that the samples obtained at the longest microwave irradiation time promoted the formation of structural defects and enhanced the material properties.

引用

页数：11

共 63 条

[1] A Combined Experimental and Theoretical Study on the Formation of Ag Filaments on β-Ag2MoO4 Induced by Electron Irradiation [J].

Andres, Juan ;

Ferrer, Mateus M. ;

Gracia, Lourdes ;

Beltran, Armando ;

Longo, Valeria M. ;

Cruvinel, Guilherme H. ;

Tranquilin, Ricardo L. ;

Longo, Elson .

PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 2015, 32 (06) :646-651

[2] Structural and electronic analysis of the atomic scale nucleation of Ag on α-Ag2WO4 induced by electron irradiation [J].

Andres, Juan ;

Gracia, Lourdes ;

Gonzalez-Navarrete, Patricio ;

Longo, Valeria M. ;

Avansi, Waldir, Jr. ;

Volanti, Diogo P. ;

Ferrer, Mateus M. ;

Lemos, Pablo S. ;

La Porta, Felipe A. ;

Hernandes, Antonio C. ;

Longo, Elson .

SCIENTIFIC REPORTS, 2014, 4

[3] Ag Nanoparticles/α-Ag2WO4 Composite Formed by Electron Beam and Femtosecond Irradiation as Potent Antifungal and Antitumor Agents [J].

Assisi, M. ;

Robeldo, T. ;

Foggi, C. C. ;

Kubo, A. M. ;

Minguez-Vega, G. ;

Condoncillo, E. ;

Beltran-Mir, H. ;

Torres-Mendieta, R. ;

Andres, J. ;

Oliva, M. ;

Vergani, C. E. ;

Barbugli, P. A. ;

Camargo, E. R. ;

Borra, R. C. ;

Longo, E. .

SCIENTIFIC REPORTS, 2019, 9 (1)

[4] Silver molybdate nanoparticles, nanowires, and nanorods embedded in glass nanocomposites [J].

Bhattacharya, S. ;

Ghosh, A. .

PHYSICAL REVIEW B, 2007, 75 (09)

[5] Experimental and Theoretical Study on the Structure, Optical Properties, and Growth of Metallic Silver Nanostructures in Ag3PO4 [J].

Botelho, G. ;

Sczancoski, J. C. ;

Andres, J. ;

Gracia, L. ;

Longo, E. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2015, 119 (11) :6293-6306

[6] Cluster Coordination and Photoluminescence Properties of α-Ag2WO4 Microcrystals [J].

Cavalcante, L. S. ;

Almeida, M. A. P. ;

Avansi, W., Jr. ;

Tranquilin, R. L. ;

Longo, E. ;

Batista, N. C. ;

Mastelaro, V. R. ;

Siu Li, M. .

INORGANIC CHEMISTRY, 2012, 51 (20) :10675-10687

[7] Electro-deposition of luminescent molybdate and tungstate thin films via a cell route [J].

Chen, Lianping ;

Gao, Yuanhong .

MATERIALS CHEMISTRY AND PHYSICS, 2009, 116 (01) :242-246

[8] Photoswitches of One-Dimensional Ag2MO4 (M = Cr, Mo, and W) [J].

Cheng, Liang ;

Shao, Qi ;

Shao, Mingwang ;

Wei, Xianwen ;

Wu, Zhengcui .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (05) :1764-1768

[9] Structural, morphological and optical investigation of β-Ag2MoO4 microcrystals obtained with different polar solvents [J].

Cunha, F. S. ;

Sczancoski, J. C. ;

Nogueira, I. C. ;

de Oliveira, V. G. ;

Lustosa, S. M. C. ;

Longo, E. ;

Cavalcante, L. S. .

CRYSTENGCOMM, 2015, 17 (43) :8207-8211

[10] Acetone gas sensor based on α-Ag2WO4 nanorods obtained via a microwave-assisted hydrothermal route [J].

da Silva, Luis F. ;

Catto, Ariadne C. ;

Avansi, Waldir, Jr. ;

Cavalcante, Laecio S. ;

Mastelaro, Valmor R. ;

Andres, Juan ;

Aguir, Khalifa ;

Longo, Elson .

JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 683 :186-190

← 1 2 3 4 5 6 7 →