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Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7
Wan, Lipeng1,2; Xiong, Feng-Qiang2; Li, Yue1,2; Thomas, Tiju3; Che, Ruxin1; Yang, Minghui2
关键词Solar Energy Materials Defects Porous Materials
刊名MATERIALS LETTERS
2017-02-01
DOI10.1016/j.matlet.2016.11.012
188页:212-214
收录类别SCI
文章类型Article
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
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.
语种英语
WOS记录号WOS:000390740500057
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/151849
专题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
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Wan, Lipeng,Xiong, Feng-Qiang,Li, Yue,et al. Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7[J]. MATERIALS LETTERS,2017,188:212-214.
APA Wan, Lipeng,Xiong, Feng-Qiang,Li, Yue,Thomas, Tiju,Che, Ruxin,&Yang, Minghui.(2017).Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7.MATERIALS LETTERS,188,212-214.
MLA Wan, Lipeng,et al."Low defect density, high surface area LaNbON2 prepared via nitridation of La3NbO7".MATERIALS LETTERS 188(2017):212-214.
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