High efficiency photocatalytic hydrogen production over ternary Cu/TiO2@Ti3C2Tx enabled by low-work-function 2D titanium carbide
文献类型：期刊论文
| 作者 | Peng, C1; Wei, P; Li, XY; Liu, YP; Cao, YH; Wang, HJ; Yu, H; Peng, F2; Zhang, LY; Zhang, BS |
| 刊名 | NANO ENERGY
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 53页码:97-107 |
| 关键词 | MXenes Titanium carbides Hole mediators Copper cocatalysts Photocatalytic water splitting Hydrogen evolution reaction |
| ISSN号 | 2211-2855 |
| DOI | 10.1016/j.nanoen.2018.08.040 |
| 英文摘要 | It is of prime importance to harness the transfer and flow of photogenerated electrons and holes to elongate the lifetimes of charge carriers and enhance the activity of semiconductor photocatalyst, which can be achieved by hybridizing the photocatalyst with appropriate cocatalysts with right electronic properties and placement. Herein, MXenes, a young family of two-dimensional transition metal carbides, are exploited as a hole mediator to enhance the photocatalytic activity of TiO2. We grow TiO2 sheets exposing (001) surfaces on layered Ti3C2Tx, and then photodeposited Cu2O nanodots on TiO2. We experimentally prove that the Ti3C2Tx MXene from the wet HF etching method behaves as a low work function material (phi = 3.4 eV). Thanks to this unique electronic property, the photogenerated electrons on TiO2 hybridized with Ti3C2Tx accumulate and tunnel to Cu2O to reduce it to elemental Cu as a reduction cocatalyst. The resulting Cu/TiO2@Ti3C2Tx photocatalyst efficiently split water to produce hydrogen at 860 mu mol g(-1) h(-1). The results presented here demonstrate the promise of MXene materials in photocatalytic solar energy utilization. The insight into the electronic property of MXene sheds light on the new approach to the rational design of high-efficiency photocatalysts composed of MXenes. |
| 学科主题 | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| WOS记录号 | WOS:000448994600012 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79850]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.South China Univ Technol, Sch Chem & Chem Engn, Guangdong Prov Key Lab Green Chem Prod Technol, Guangzhou 510640, Guangdong, Peoples R China 2.Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Peoples R China 3.Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou 510006, Guangdong, Peoples R China 4.Chinese Acad Sci, Shenyang Natl Lab Mat, Inst Met Res, Catalysis & Mat Div, Shenyang 110016, Liaoning, Peoples R China 5.South Cent Univ Nationalities, Coll Resources & Environm Sci, Wuhan 430074, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, C,Wei, P,Li, XY,et al. High efficiency photocatalytic hydrogen production over ternary Cu/TiO2@Ti3C2Tx enabled by low-work-function 2D titanium carbide[J]. NANO ENERGY,2018,53:97-107. |
| APA | Peng, C.,Wei, P.,Li, XY.,Liu, YP.,Cao, YH.,...&Lv, KL.(2018).High efficiency photocatalytic hydrogen production over ternary Cu/TiO2@Ti3C2Tx enabled by low-work-function 2D titanium carbide.NANO ENERGY,53,97-107. |
| MLA | Peng, C,et al."High efficiency photocatalytic hydrogen production over ternary Cu/TiO2@Ti3C2Tx enabled by low-work-function 2D titanium carbide".NANO ENERGY 53(2018):97-107. |
入库方式： OAI收割
来源：金属研究所
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