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Scalable synthesis of ytterbium and erbium codoped calcium molybdate phosphors as upconversion luminescent thermometer |
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| Authors: | Jun Liu Yiran Jiao Yuan Pu Jie-Xin Wang Dan Wang |
| Affiliation: | 1. State Key Laboratory of Organic Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029 China Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029 China Contribution: Data curation (equal), Investigation (equal), Writing - original draft (equal);2. State Key Laboratory of Organic Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029 China Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029 China Contribution: Data curation (equal), Methodology (equal), Writing - original draft (equal);3. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029 China Contribution: Supervision (equal), Writing - review & editing (equal);4. State Key Laboratory of Organic Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029 China |
| Abstract: | Luminescent thermometry is a noninvasive method of temperature detection with high sensitivity and response speed. The present study demonstrated the process-intensified synthesis of ytterbium and erbium codoped calcium molybdate phosphors (CaMoO4:Yb3+/Er3+). The experiment involved the initial premixing of the precursors using a high-gravity rotating packed bed (RPB) reactor and subsequent calcination processing. The pronounced mass transfer and micromixing of the reactants in the RPB facilitated the scalable and controllable synthesis of CaMoO4:Yb3+/Er3+ particles with submicron sizes and regular morphologies. The CaMoO4:Yb3+/Er3+ particles exhibited a bright-green emission with temperature-dependent luminescence characteristics under 980 nm laser irradiation. Furthermore, the maximum absolute sensitivity was determined to be 0.02837 K−1. These results indicated that the synthesized product was a suitable candidate for application in upconversion luminescent thermometers capable of temperature sensing at the microscale. |
| Keywords: | CaMoO4:Yb3+/Er3+ mixing photoluminescence rotating packed bed temperature sensing |