Nanolayered Heterostructures of N-Doped TiO2 and N-Doped Carbon for Hydrogen Evolution,ACS Applied Energy Materials

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Nanolayered Heterostructures of N-Doped TiO2 and N-Doped Carbon for Hydrogen Evolution
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-01-28 00:00:00 , DOI: 10.1021/acsanm.9b02217
Xianglong Kong ₁ , Zhenbo Peng ₂ , Rui Jiang ₁ , Peipei Jia ₁ , Jing Feng ₁ , Piaoping Yang ₁ , Qianqian Chi ₃ , Wei Ye ₃ , Fuchun Xu ₃ , Peng Gao _{1,

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Affiliation

Both doping and compositing in TiO₂ are exceedingly effective strategies to overcome the compound’s shortcomings, such as invalid visible-light response and enormous recombination of photogenerated carriers. Herein, a convenient and cost-effective route has been put forward to in situ synthesize nanolayered heterostructure based on N-doped TiO₂ nanoparticles and N-doped carbon (N-TiO₂/NC) using 2D layered N-MXene (N–Ti₃C₂T_x) as the template. The as-obtained N-TiO₂/NC nanocomposite displays greatly enhanced visible light absorption property, superior carrier separation and transport ability. As a result, the nanolayered N-TiO₂/NC heterostructure exhibits a satisfactory H₂ evolution rate from water-splitting (102.6 μmol g^–1 h^–1) under visible-light without any additional cocatalyst. The study provides a new strategy for the synthesis of defective nanoheterostructure and expands the applications of MXene family.

中文翻译：

N掺杂的TiO ₂和N掺杂的碳的纳米层异质结构用于析氢

TiO ₂中的掺杂和复合都是克服该化合物缺点（例如无效的可见光响应和光生载流子的大量重组）的极其有效的策略。在此，提出了一种便捷且经济高效的途径，即使用二维层状N-MXene（N–Ti）原位合成基于N掺杂的TiO ₂纳米颗粒和N掺杂的碳（N-TiO ₂ / NC）的纳米层异质结构。₃ C ₂ T _x）作为模板。所获得的N-TiO ₂ / NC纳米复合材料显示器极大地提高了可见光吸收性能，优异的载流子分离和传输能力。结果，纳米层的N-TiO ₂/ NC异质结构在可见光下由水分解（102.6μmolg ^–1 h ^–1）显示出令人满意的H ₂释放速率，而没有任何其他助催化剂。该研究为合成有缺陷的纳米异质结构提供了新的策略，并扩展了MXene系列的应用。

更新日期：2020-01-28

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