Bindhyabasinee Mishra, Jyotirmayee Nanda, Subhra S. Brahma, K.J. Sankaran, R. Sakthivel, S. Ghadei, S. Suman
{"title":"La3+掺杂对Mg-Zn纳米铁氧体结构、磁性和LPG气敏性能的影响","authors":"Bindhyabasinee Mishra, Jyotirmayee Nanda, Subhra S. Brahma, K.J. Sankaran, R. Sakthivel, S. Ghadei, S. Suman","doi":"10.1016/j.mseb.2023.117029","DOIUrl":null,"url":null,"abstract":"<p>A series of polycrystalline mixed spinel ferrites, Mg<sub>0.5</sub>Zn<sub>0.5</sub>La<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> (x = 0, 0.025, 0.05, 0.075, 0.1) were synthesized by hydrothermal method, where NaBH<sub>4</sub> was a reductant. The Rietveld refinement analysis demonstrated the La<sup>3+</sup> occupancy in A and B positions. FESEM and HRTEM have shown nearly spherical nanoparticles with an average size of 7 nm. The existence of all the component elements were confirmed by EDS and XPS studies. Raman analysis have shown slight blue shift with higher La<sup>3+</sup> concentration. These nano-ferrites were noticed to behave ferromagnetically, with small remanent magnetization. The nano-ferrites were tested for the LPG sensing, where the sensor response was understood by proposing the charge carrier (Fe<sup>2+</sup> and Fe<sup>3+</sup>) hopping mechanism. The sensor response (%) of the sample (x = 5%) at 500 ppm exhibited highest value ∼36, as compared to sample (x = 0%). To conclude, Mg<sub>0.5</sub>Zn<sub>0.5</sub>La<sub>0.05</sub>Fe<sub>1.95</sub>O<sub>4</sub> showed better response and recovery time, rather than other spinel ferrites.</p>","PeriodicalId":501486,"journal":{"name":"Materials Science and Engineering: B","volume":"9 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of La3+ doping on structural, magnetic and LPG gas-sensing properties of Mg-Zn nano-ferrites\",\"authors\":\"Bindhyabasinee Mishra, Jyotirmayee Nanda, Subhra S. Brahma, K.J. Sankaran, R. Sakthivel, S. Ghadei, S. Suman\",\"doi\":\"10.1016/j.mseb.2023.117029\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>A series of polycrystalline mixed spinel ferrites, Mg<sub>0.5</sub>Zn<sub>0.5</sub>La<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> (x = 0, 0.025, 0.05, 0.075, 0.1) were synthesized by hydrothermal method, where NaBH<sub>4</sub> was a reductant. The Rietveld refinement analysis demonstrated the La<sup>3+</sup> occupancy in A and B positions. FESEM and HRTEM have shown nearly spherical nanoparticles with an average size of 7 nm. The existence of all the component elements were confirmed by EDS and XPS studies. Raman analysis have shown slight blue shift with higher La<sup>3+</sup> concentration. These nano-ferrites were noticed to behave ferromagnetically, with small remanent magnetization. The nano-ferrites were tested for the LPG sensing, where the sensor response was understood by proposing the charge carrier (Fe<sup>2+</sup> and Fe<sup>3+</sup>) hopping mechanism. The sensor response (%) of the sample (x = 5%) at 500 ppm exhibited highest value ∼36, as compared to sample (x = 0%). To conclude, Mg<sub>0.5</sub>Zn<sub>0.5</sub>La<sub>0.05</sub>Fe<sub>1.95</sub>O<sub>4</sub> showed better response and recovery time, rather than other spinel ferrites.</p>\",\"PeriodicalId\":501486,\"journal\":{\"name\":\"Materials Science and Engineering: B\",\"volume\":\"9 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-11-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Science and Engineering: B\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.mseb.2023.117029\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: B","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.mseb.2023.117029","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of La3+ doping on structural, magnetic and LPG gas-sensing properties of Mg-Zn nano-ferrites
A series of polycrystalline mixed spinel ferrites, Mg0.5Zn0.5LaxFe2-xO4 (x = 0, 0.025, 0.05, 0.075, 0.1) were synthesized by hydrothermal method, where NaBH4 was a reductant. The Rietveld refinement analysis demonstrated the La3+ occupancy in A and B positions. FESEM and HRTEM have shown nearly spherical nanoparticles with an average size of 7 nm. The existence of all the component elements were confirmed by EDS and XPS studies. Raman analysis have shown slight blue shift with higher La3+ concentration. These nano-ferrites were noticed to behave ferromagnetically, with small remanent magnetization. The nano-ferrites were tested for the LPG sensing, where the sensor response was understood by proposing the charge carrier (Fe2+ and Fe3+) hopping mechanism. The sensor response (%) of the sample (x = 5%) at 500 ppm exhibited highest value ∼36, as compared to sample (x = 0%). To conclude, Mg0.5Zn0.5La0.05Fe1.95O4 showed better response and recovery time, rather than other spinel ferrites.
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