NDLI: Microwave-assisted hydrothermal synthesis of Ag2(W(1-x)Mox)O4 heterostructures: Nucleation of Ag, morphology, and photoluminescence properties.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Gonçalves, R. F. Longo, E. Santana, Y. V. Nogueira, I. C. Moron, M. G. Silva, M. D. P. Mondoni, L. Longo, V. M.
Description	Country affiliation: Brazil Author Affiliation: Silva MD ( LIEC-Universidade Federal de São Carlos, Rod. Washington Luis, km 235, São Carlos, SP CEP: 13565-905, Brazil.); Gonçalves RF ( UNIFESP-Universidade Federal de São Paulo, Rua Prof. Artur Riedel, 275, Diadema, SP CEP 09972-270, Brazil. Electronic address: rosanaf.gon@gmail.com.); Nogueira IC ( IFMA - Instituto Federal do Maranhão, Avenida Getúlio Vargas, no 04 - Monte Castelo, São Luís, MA CEP 65030-005, Brazil.); Longo VM ( USP - Universidade de São Paulo, Av. Trabalhador São-Carlense, 400 - Arnold Schimidt, São Carlos, SP CEP 13566-590, Brazil.); Mondoni L ( LIEC-Universidade Federal de São Carlos, Rod. Washington Luis, km 235, São Carlos, SP CEP: 13565-905, Brazil.); Moron MG ( LIEC-Universidade Federal de São Carlos, Rod. Washington Luis, km 235, São Carlos, SP CEP: 13565-905, Brazil.); Santana YV ( UTFPR-Universidade Tecnológica Federal do Paraná, Av. Alberto Carazzai, 1640, Cornélio Procópio, PR CEP 86300-000, Brazil.); Longo E ( LIEC-IQ-Universidade Estadual Paulista, P.O. Box 355, Araraquara, SP CEP 14801-907, Brazil.)
Abstract	Ag2W(1-x)MoxO4 (x=0.0 and 0.50) powders were synthesized by the co-precipitation (drop-by-drop) method and processed using a microwave-assisted hydrothermal method. We report the real-time in situ formation and growth of Ag filaments on the Ag2W(1-x)MoxO4 crystals using an accelerated electron beam under high vacuum. Various techniques were used to evaluate the influence of the network-former substitution on the structural and optical properties, including photoluminescence (PL) emission, of these materials. X-ray diffraction results confirmed the phases obtained by the synthesis methods. Raman spectroscopy revealed significant changes in local order-disorder as a function of the network-former substitution. Field-emission scanning electron microscopy was used to determine the shape as well as dimensions of the Ag2W(1-x)MoxO4 heterostructures. The PL spectra showed that the PL-emission intensities of Ag2W(1-x)MoxO4 were greater than those of pure Ag2WO4, probably because of the increase of intermediary energy levels within the band gap of the Ag2W(1-x)MoxO4 heterostructures, as evidenced by the decrease in the band-gap values measured by ultraviolet-visible spectroscopy.
ISSN	13861425
Journal	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Volume Number	153
e-ISSN	18733557
Language	English
Publisher	Elsevier
Publisher Date	2016-01-15
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation

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