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

dc.contributor.authorMerizio L.G.
dc.contributor.authorBonturim E.
dc.contributor.authorIchikawa R.U.
dc.contributor.authorSilva I.G.N.
dc.contributor.authorTeixeira V.C.
dc.contributor.authorRodrigues L.C.V.
dc.contributor.authorBrito H.F.
dc.description.abstract© 2021The synthesis of persistent luminescent materials usually requires a multi-step long time annealing at high temperatures (>1200°C) in a resistive oven, causing a huge energy consumption. Also, to achieve reduced oxidation states of emitter ions (e.g., Eu3+ → Eu2+ ), the H2(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.
dc.rightsAcesso Restrito
dc.subject.otherlanguageMicrowave-assisted solid-state synthesis
dc.subject.otherlanguageRapid thermal annealing
dc.subject.otherlanguageSolid state reaction
dc.subject.otherlanguageSynchrotron radiation
dc.titleToward an energy-efficient synthesis method to improve persistent luminescence of Sr2MgSi2O7:Eu2+,Dy3+ materials
local.scopus.subjectCeramic methods
local.scopus.subjectEfficient synthesis
local.scopus.subjectEnergy efficient
local.scopus.subjectLuminescent material
local.scopus.subjectMicrowave-assisted solid-state synthesis
local.scopus.subjectSolid state method
local.scopus.subjectSolid-state reactions
local.scopus.subjectSolid-state synthesis