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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
KeywordSolar Energy Materials Defects Porous Materials
Source PublicationMATERIALS LETTERS
2017-02-01
DOI10.1016/j.matlet.2016.11.012
Volume188Pages:212-214
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaMaterials Science ; Physics
WOS KeywordPEROVSKITES ; METALS
AbstractThe 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.
Language英语
WOS IDWOS:000390740500057
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/151849
Collection中国科学院大连化学物理研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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