Toward an energy-efficient synthesis method to improve persistent luminescence of Sr2MgSi2O7:Eu2+,Dy3+ materials

Autor(es)

Merizio, L. G. ^{[1, 2]} ; Bonturim, E. ^{[3, 2]} ; Ichikawa, R. U. ^[4] ; Silva, I. G. N. ^[5] ; Teixeira, V. C. ^[6] ; Rodrigues, L. C. V. ^[2] ; Brito, H. F. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo IFSC USP, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo IQ USP, Inst Chem, Dept Fundamental Chem, BR-05508000 Sao Paulo, SP - Brazil

^[3] Univ Prebiteriana Mackenzie, Sch Engn, Dept Chem, BR-01302907 Sao Paulo, SP - Brazil

^[4] Nucl & Energy Res Inst IPEN, CNEN SP, BR-05508000 Sao Paulo, SP - Brazil

^[5] Univ Sao Paulo IF USP, Inst Phys, BR-05508090 Sao Paulo, SP - Brazil

^[6] Brazilian Ctr Res Energy & Mat LNLS CNPEM, Brazilian Synchrotron Light Lab, BR-13084971 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALIA; v. 20, DEC 2021.
• Citações Web of Science: 0

Resumo

The synthesis of persistent luminescent materials usually requires a multi-step long time annealing at high temperatures (> 1200 degrees C) in a resistive oven, causing a huge energy consumption. Also, to achieve reduced oxidation states of emitter ions (e.g., Eu3+ -> Eu2+), the H-2(g) atmosphere is often used, which can be dangerous and increase the costs of the process. Therefore, the development of a quick and new single-step green strategy, using in-situ low-risk atmosphere (e.g., CO(g)) and a microwave-assisted solid-state (MASS) method has been encouraged. In this work, we present a single-step method to synthesize the compound Sr2MgSi2O7:Eu2+,Dy3+ using the MASS method and the results were compared with those prepared by a conventional ceramic method. The luminescent material was prepared in 25 min of synthesis using carbon as a microwave susceptor and CO(g) atmosphere source at the same time. A higher concentration of Eu2+ emitter was identified by XANES in the MASS method product, which has a significant effect on the luminescence efficiency, as well as an improvement in the optical properties, leading to an emission 100 times more intense. Furthermore, to understand the Eu3+ reduction process under CO(g) atmosphere, we present here the innovative results of in-situ XANES analysis for the Sr2MgSi2O7:Eu2+,Dy3+ material. Finally, the MASS method makes it possible to prepare the materials with less than 5% of the ceramic method's duration in time. The energy-saving and better-quality persistent luminescent properties obtained in the MASS method provide viable applications on anti-counterfeiting markers, solar cell sensitizers, and other luminescent technologies. (AU)

• Processo FAPESP: 10/19278-0 - Estudo da regulação de ADAMs em câncer oral
• Beneficiário: Adriana Franco Paes Leme
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 18/05280-5 - Materiais fotônicos ativos no vermelho-infravermelho para conversão e armazenamento de energia
• Beneficiário: Lucas Carvalho Veloso Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/21770-5 - Materiais luminescentes incorporados à vidros: novos compósitos para aplicações em iluminação de segurança e detectores de radiação
• Beneficiário: Leonnam Gotardo Merizio
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado