Ammonolysis-free synthesis of La2O2CN2 by cyanamidation of La(OH)3 using urea, and its photoluminescence properties

被引：5

作者：

Okada, Ryoki ^{[1
]}

Kawanishi, Kodai ^{[1
]}

Katagiri, Kiyofumi ^{[1
]}

Inumaru, Kei ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, 1-4-1 Kagamiyama, Higashihiroshima 7398527, Japan

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 07期

关键词：

Oxycyanamide; Carbodiimide; Mixed anion compound; Phosphor; Urea; LUMINESCENCE; DECOMPOSITION; REDUCTION; PHOSPHORS;

D O I：

10.1016/j.ceramint.2019.01.262

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 La(2)O(2)CN(2 )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.

引用

收藏

页码：9325 / 9329

页数：5

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