One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light
文献类型：期刊论文
| 作者 | Yu, Lian; Yang, Xiaofang; He, Jie; He, Yi ; Wang, Dongsheng
|
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2015-07-15 |
| 卷号 | 637期号:0页码:308-314 |
| 关键词 | TiO2 High-energy facets N Visible light activity Photocatalysis La co-doping |
| 英文摘要 | The photocatalytic activity of TiO2 can be mainly improved from three approaches: (1) enhancing the separation efficiency of photoelectrons and holes, (2) enhancing surface energy, and (3) increasing availability of visible light. Here, we report a one-step method to obtain nitrogen and lanthanum co-doped TiO2 nanosheets with dominant {001} facets through a hydrothermal process, using TBOT, triethylamine and LaCl3 center dot nH(2)O as precursor and sources of N, La respectively in HF-HNO3 mixed aqueous solution, and the samples were characterized by XRD, SEM, TEM, XPS, UV-DRS and BET analyses. The XRD and XPS results confirmed that N was doped into the lattice of anatase TiO2, while La was not. N acts as an O-Ti-N structure or interstitial N and La exists as LaF3 in TiO2 nanosheets. The SEM and TEM results show that the percentage of {001} facets in the as-synthesized N, La-TiO2 nanosheets is estimated to be about 75% on average at R-F = 1.0. N,La-TiO2 nanosheets can absorb visible light due to the red shift in the absorption edges, and compared with N-TiO2 nanosheets, N and La co-doping can further strengthen the absorption of visible light. N, La-TiO2 nanosheets exhibited higher photocatalytic activity for photodegradation of Rh B under visible light than pure TiO2, N-TiO2, La-TiO2 nanosheets and N, La-TiO2 nanoparticles. N and La co-doping could produce a synergistic effect. The N doping narrowed the band gap of TiO2, while the La doping could improve the separation efficiency of photoelectrons and holes. In addition, the La doping could enhance the adsorption property of photocatalyst for organic pollutants. (C) 2015 Elsevier B.V. All rights reserved. |
| 研究领域[WOS] | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS记录号 | WOS:000353377200048 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32813]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yu, Lian,Yang, Xiaofang,He, Jie,et al. One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2015,637(0):308-314. |
| APA | Yu, Lian,Yang, Xiaofang,He, Jie,He, Yi,&Wang, Dongsheng.(2015).One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light.JOURNAL OF ALLOYS AND COMPOUNDS,637(0),308-314. |
| MLA | Yu, Lian,et al."One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light".JOURNAL OF ALLOYS AND COMPOUNDS 637.0(2015):308-314. |
入库方式： OAI收割
来源：生态环境研究中心
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