Enhancing Photoactivity of TiO2(B)/Anatase Core-Shell Nanofibers by Selectively Doping Cerium Ions into the TiO2(B) Core
文献类型：期刊论文
| 作者 | Yang DJ ; Zhao J ; Liu HW ; Zheng ZF ; Adebajo MO ; Wang HX ; Liu XT ; Zhang HJ ; Zhao JC ; Bell J ; Zhu HY |
| 刊名 | chemistry-a european journal
 |
| 出版日期 | 2013 |
| 卷号 | 19期号:16页码:5113-5119 |
| 关键词 | PHOTOCATALYTIC ACTIVITY TITANATE NANOFIBERS VISIBLE-LIGHT SEMICONDUCTOR PHOTOCATALYSIS SOLVOTHERMAL REACTIONS TITANIUM-DIOXIDE TIO2-B NANOWIRES FIBROUS TITANIA THIN-FILMS METAL IONS |
| ISSN号 | 0947-6539 |
| 通讯作者 | yang dj |
| 中文摘要 | cerium ions (ce3+) can be selectively doped into the tio2(b) core of tio2(b)/anatase coreshell nanofibers by means of a simple one-pot hydrothermal treatment of a starting material of hydrogen trititanate (h2ti3o7) nanofibers. these ce3+ ions (approximate to 0.202nm) are located on the (110) lattice planes of the tio2(b) core in tunnels (width approximate to 0.297nm). the introduction of ce3+ ions reduces the defects of the tio2(b) core by inhibiting the faster growth of (110) lattice planes. more importantly, the redox potential of the ce3+/ce4+ couple (e degrees(ce3+/ce4+)=1.715v versus the normal hydrogen electrode) is more negative than the valence band of tio2(b). therefore, once the ce3+-doped nanofibers are irradiated by uv light, the doped ce3+ ionsin close vicinity to the interface between the tio2(b) core and anatase nanoshellcan efficiently trap the photogenerated holes. this facilitates the migration of holes from the anatase shell and leaves more photogenerated electrons in the anatase nanoshell, which results in a highly efficient separation of photogenerated charges in the anatase nanoshell. hence, this enhanced charge-separation mechanism accelerates dye degradation and alcohol oxidation processes. the one-pot treatment doping strategy is also used to selectively dope other metal ions with variable oxidation states such as co2+/3+ and cu+/2+ ions. the doping substantially improves the photocatalytic activity of the mixed-phase nanofibers. in contrast, the doping of ions with an invariable oxidation state, such as zn2+, ca2+, or mg2+, does not enhance the photoactivity of the mixed-phase nanofibers as the ions could not trap the photogenerated holes. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000317399600022 |
| 公开日期 | 2014-04-16 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/49936]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yang DJ,Zhao J,Liu HW,et al. Enhancing Photoactivity of TiO2(B)/Anatase Core-Shell Nanofibers by Selectively Doping Cerium Ions into the TiO2(B) Core[J]. chemistry-a european journal,2013,19(16):5113-5119. |
| APA | Yang DJ.,Zhao J.,Liu HW.,Zheng ZF.,Adebajo MO.,...&Zhu HY.(2013).Enhancing Photoactivity of TiO2(B)/Anatase Core-Shell Nanofibers by Selectively Doping Cerium Ions into the TiO2(B) Core.chemistry-a european journal,19(16),5113-5119. |
| MLA | Yang DJ,et al."Enhancing Photoactivity of TiO2(B)/Anatase Core-Shell Nanofibers by Selectively Doping Cerium Ions into the TiO2(B) Core".chemistry-a european journal 19.16(2013):5113-5119. |
入库方式： OAI收割
来源：长春应用化学研究所
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