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Understanding the High Photocatalytic Activity of (B, Ag)-Codoped TiO2 under Solar-Light Irradiation with XPS, Solid-State NMR, and DFT Calculations
文献类型：期刊论文
| 作者 | Feng, Ningdong1; Wang, Qiang1; Zheng, Anmin1; Zhang, Zhengfeng1; Fan, Jie2,3; Liu, Shang-Bin4; Amoureux, Jean-Paul5; Deng, Feng1 |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2013-01-30 |
| 卷号 | 135期号:4页码:1607-1616 |
| 英文摘要 | The origin of the exceptionally high activity of (B, Ag)-codoped TiO2 catalysts under solar-light irradiation has been investigated by XPS and B-11 solid-state NMR spectroscopy in conjunction with density functional theory (DFT) calculations. XPS experimental results demonstrated that a portion of the dopant Ag (Ag3+) ions were implanted into the crystalline lattice of (B, Ag)-codoped TiO2 and were in close proximity to the interstitial B (B-int) sites, forming [B-int-O-Ag] structural units. In situ XPS experiments were employed to follow the evolution of the chemical states of the B and Ag dopants during UV-vis irradiation. It was found that the [B-int-O-Ag] units could trap the photoinduced electron to form a unique intermediate structure in the (B, Ag)-codoped TiO2 during the irradiation, which is responsible for the photoinduced shifts of the B Is and Ag 3d peaks observed in the in situ XPS spectra. Solid-state NMR experiments including B-11 triple-quantum and double-quantum magic angle spinning (MAS) NMR revealed that up to six different boron species were present in the catalysts and only the tricoordinated interstitial boron (T*) species was in close proximity to the substitutional Ag species, leading to formation of [T*-O-Ag] structural units. Furthermore, as demonstrated by DFT calculations, the [T*-O-Ag] structural units were responsible for trapping the photoinduced electrons, which prolongs the life of the photoinduced charge carriers and eventually leads to a remarkable enhancement in the photocatalytic activity. All these unprecedented findings are expected to be crucial for understanding the roles of B and Ag dopants and their synergistic effect in numerous titania-mediated photocatalytic reactions. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | ANGLE-SPINNING NMR ; DOPED TITANIUM-DIOXIDE ; VISIBLE-LIGHT ; AMPLITUDE-MODULATION ; ANATASE TIO2 ; BORON ; AG ; NANOPARTICLES ; SPECTROSCOPY ; DYNAMICS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000314492500066 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/929]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom Mol Phys, Key Lab Magnet Resonance Biol Syst, Wuhan Ctr Magnet Resonance,Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China 2.Zhejiang Univ, Key Lab Appl Chem Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China 3.Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China 4.Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan 5.Univ Lille 1, ENSCL, UCCS CNRS 8181, F-59652 Villeneuve Dascq, France |
| 推荐引用方式 GB/T 7714 | Feng, Ningdong,Wang, Qiang,Zheng, Anmin,et al. Understanding the High Photocatalytic Activity of (B, Ag)-Codoped TiO2 under Solar-Light Irradiation with XPS, Solid-State NMR, and DFT Calculations[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2013,135(4):1607-1616. |
| APA | Feng, Ningdong.,Wang, Qiang.,Zheng, Anmin.,Zhang, Zhengfeng.,Fan, Jie.,...&Deng, Feng.(2013).Understanding the High Photocatalytic Activity of (B, Ag)-Codoped TiO2 under Solar-Light Irradiation with XPS, Solid-State NMR, and DFT Calculations.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,135(4),1607-1616. |
| MLA | Feng, Ningdong,et al."Understanding the High Photocatalytic Activity of (B, Ag)-Codoped TiO2 under Solar-Light Irradiation with XPS, Solid-State NMR, and DFT Calculations".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 135.4(2013):1607-1616. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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