The Effects of Li/Nb Ratio on the Preparation and Photocatalytic Performance of Li-Nb-O Compounds
作者： Haifa Zhai , Hairui Liu , Hongjing Li , Liuyang Zheng , Chunjie Hu
DOI: 10.1186/S11671-017-2273-8
关键词: Ion 、 Photocatalysis 、 Materials science 、 Chemical bond 、 Lithium niobate 、 Hydrothermal circulation 、 Nanochemistry 、 Nanotechnology 、 Particle aggregation 、 Particle 、 Chemical engineering
摘要: The effects of Li/Nb ratio on the preparation Li-Nb-O compounds by a hydrothermal method were studied deeply. has great impact formation LiNbO3; smaller than 3:1 is beneficial to LiNbO3, while larger 3:1, forms no LiNbO3 at all and morphology chemical bond Nb2O5 raw material are totally modified Li ions. reason can be attributed large content LiOH, which form Li3NbO4 not also, even if particle locally forms, it easily dissolved in LiOH solution with strong alkalinity. Pure LiNb3O8 powders obtained two absolutely opposite ratios: 8:1 1:3; former shows unique porous hollow structure, quite different from aggregation (the latter shows). Compared Li/Nb = 1:3, 4.2 times higher photocatalytic performance (Li/Nb = 8:1) observed provides high density active sites for degradation MB. improved its layered structure type reduced symmetry enhancing separation electrons holes.
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