Defect-induced optical and electrochemical properties of Pr2Sn2O7 nanoparticles enhanced by Bi3+ doping
| Autor: | Yuanbing Mao, Allen Abraham, Swati Mohan, Hisham Abdou, Santosh K. Gupta |
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| Rok vydání: | 2020 |
| Předmět: |
Tafel equation
Materials science Photoluminescence Mechanical Engineering Doping Oxygen evolution Nanoparticle Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst Electrochemistry 01 natural sciences 0104 chemical sciences Chemical engineering Mechanics of Materials General Materials Science 0210 nano-technology |
| Zdroj: | Journal of Materials Research. 35:1214-1224 |
| ISSN: | 2044-5326 0884-2914 |
| Popis: | Materials that show superior light-emitting and catalytic properties are in high demand among the scientific community owing to their applications in the areas of optoelectronics and (opto)electrocatalysis. In this work, we have synthesized sub-10-nm Pr2Sn2O7 (PSO) and Pr2Sn2O7:Bi3+ (PSOB) nanoparticles (NPs) and investigated their optical and electrochemical properties. On ultraviolet irradiation, PSO NPs display blue emission because of the presence of oxygen vacancies. Interestingly, PSOB NPs have higher blue emission intensity than undoped PSO NPs owing to the increase in oxygen vacancy defect density induced by Bi3+ doping. Moreover, PSOB NPs display higher efficiency in terms of current density than PSO NPs as a catalyst toward the oxygen evolution reaction (OER). The kinetic OER models of PSO and PSOB NPs are quite different as displayed by their different Tafel slopes. Interestingly and as another advantage, the PSOB sample is more conducting with low impedance value than the PSO counterpart. With all these advantages due to high oxygen vacancies induced by Bi3+ doping, PSOB NPs have a great potential to be used as blue phosphors, charge storage devices, and capacitors. |
| Databáze: | OpenAIRE |
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