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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The synergy between Ti species and g-C3N4 by doping and hybridization for the enhancement of photocatalytic H-2 evolution
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The synergy between Ti species and g-C3N4 by doping and hybridization for the enhancement of photocatalytic H-2 evolution

机译：通过掺杂和杂交增强Ti物种与g-C3N4的协同作用以增强光催化H-2的生成

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摘要

A Ti species modified g-C3N4 photocatalyst was synthesized via an in situ hydrothermal route and the subsequent low-temperature calcination. The hydrothermal process results in not only the fabrication of TiO2/g-C3N4 heterojunctions, but also the coordination between Ti species and g-C3N4, which are verified by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The electrical resistance test confirms that the coordination can improve the electrical conductivity of composites and can make the charge transfer easier. The photoluminescence (PL) and photocurrent measurements exhibit that the hybridization enhances the separation efficiency of photo-induced electrons and holes. As a result, the Ti species modified g-C3N4 photocatalysts exhibit much higher photocatalytic H-2 evolution than the simple heterojunction of TiO2/g-C3N4 obtained via a microwave method and the mechanical mixture of TiO2 and g-C3N4 under visible-light irradiation. The coordination mechanism and synthesis route of TiO2/g-C3N4 heterojunctions are proposed.
机译：通过原位水热路线和随后的低温煅烧合成了Ti改性的g-C3N4光催化剂。水热过程不仅导致TiO2 / g-C3N4异质结的产生，而且还导致Ti物种与g-C3N4之间的配位，这通过X射线衍射（XRD）和X射线光电子能谱（XPS）进行了验证。电阻测试证实，配位可以提高复合材料的电导率，并使电荷转移更容易。光致发光（PL）和光电流测量表明，杂交增强了光诱导电子和空穴的分离效率。结果，与通过微波方法获得的TiO2 / g-C3N4的简单异质结以及可见光照射下TiO2和g-C3N4的机械混合物相比，Ti物种改性的g-C3N4光催化剂表现出更高的光催化H-2演化。 。提出了TiO2 / g-C3N4异质结的配位机理和合成途径。

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