Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7
文献类型：期刊论文
| 作者 | Thomas, Tiju3; Yang, Minghui2; Wan, Lipeng1,2; Xiong, Feng-Qiang2; Li, Yue1,2; Che, Ruxin1 |
| 刊名 | MATERIALS LETTERS
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 188页码:212-214 |
| 关键词 | Solar energy materials Defects Porous materials |
| 英文摘要 | The presence of low-valent Nb-based point defects and low surface area are common issues within niobium oxynitrides. Herein, La3NbO7 which has richer basic oxide and lower positive Mulliken charge on Nb(V) than LaNbO4, was prepared via NaCl-KCl mixed flux synthesis and converted to perovskite-type LaNbON2 via thermal ammonolysis. Removal of secondary product La2O3 from ammonolysis of La3NbO7 gives rise to additional nanopores in LaNbON2 besides the pores resulted from nitridation. This makes a bigger specific surface area (23 m(2)/g) than conventional LaNbON2 prepared from LaNbO4 (11 m(2)/g). Moreover, UV-vis spectrum of LaNbON2 from La3NbO7 reveals much lower defect absorption than LaNbON2 from LaNbO4; thermogravimetric analysis shows that the mass-gain stage attributed to oxidation of low-valent Nb is present in curve of LaNbON2 from LaNbO4 while absent in that of LaNbON2 from La3NbO7. These indicate that the formation of low-valent Nb defects in LaNbON2 is inhibited when using La3NbO7 as precursor. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Materials Science, Multidisciplinary ; Physics, Applied |
| 研究领域[WOS] | Materials Science ; Physics |
| 关键词[WOS] | PEROVSKITES ; METALS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000390740500057 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/151849]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Dalian Jiaotong Univ, Coll Mat Sci & Engn, Coll Environm & Chem Engn, Dalian 116028, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 3.Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai 600036, Tamil Nadu, India |
| 推荐引用方式 GB/T 7714 | Thomas, Tiju,Yang, Minghui,Wan, Lipeng,et al. Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7[J]. MATERIALS LETTERS,2017,188:212-214. |
| APA | Thomas, Tiju,Yang, Minghui,Wan, Lipeng,Xiong, Feng-Qiang,Li, Yue,&Che, Ruxin.(2017).Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7.MATERIALS LETTERS,188,212-214. |
| MLA | Thomas, Tiju,et al."Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7".MATERIALS LETTERS 188(2017):212-214. |
入库方式： OAI收割
来源：大连化学物理研究所
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