Ammonolysis-free synthesis of La2O2CN2 by cyanamidation of La(OH)3 using urea, and its photoluminescence properties
Ceramics International Volume 45 Issue 7
Page 9325-9329
published_at 2019-05
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| File | |
| Title ( eng ) |
Ammonolysis-free synthesis of La2O2CN2 by cyanamidation of La(OH)3 using urea, and its photoluminescence properties
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| Creator |
Okada Ryoki
Kawanishi Kodai
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| Source Title |
Ceramics International
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| Volume | 45 |
| Issue | 7 |
| Start Page | 9325 |
| End Page | 9329 |
| Abstract |
A facile method was successfully developed to prepare lanthanum oxycyanamide, La2O2CN2. Urea was selected as a cyanamidation agent, instead of gaseous NH3 with graphite containers, to achieve a safe and simple synthetic strategy. Through the optimization of reaction conditions, including content of urea and heat-treatment temperature, single-phase La2O2CN2 could be obtained without any impurities. We also prepared a La2O2CN2:Eu3+ phosphor. The Eu3+-doped La2O2CN2 matrix showed a red emission. Furthermore, in comparison with La2O3:Eu3+, the photoluminescence excitation bands corresponding to the Eu3+–ligand charge transfer region were broadened. These results suggested that La2O2CN2 prepared via the urea route will offer superb application prospects for photoluminescence materials such as white light-emitting diodes.
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| Keywords |
Oxycyanamide
Carbodiimide
Mixed anion compound
Phosphor
Urea
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| Descriptions |
This work was supported by JSPS KAKENHI Grant Numbers JP17H05483 and JP17H03392. This work was partly supported by the Center for Functional Nano Oxide at Hiroshima University, Japan.
アクセプト後にキーワードの変更あり。
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
Elsevier
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| Date of Issued | 2019-05 |
| Rights |
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
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| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0272-8842
[DOI] 10.1016/j.ceramint.2019.01.262
[DOI] https://doi.org/10.1016/j.ceramint.2019.01.262
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| Remark | Post-print version/PDF may be used in an institutional repository after an embargo period of 24 months. |
