Emerging surface strategies on graphitic carbon nitride for solar driven water splitting
Emerging surface strategies on graphitic carbon nitride for solar driven water splitting
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用于太阳能驱动水分解的石墨氮化碳的新兴表面策略
DOI：
10.1016/j.cej.2019.122812
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发表时间：
2020-02
影响因子：
15.1
通讯作者：
Hui Xu⁎
中科院分区：
文献类型：
--
作者：
Jianjian Yi;Wiam El-Alami;Yanhua Song;Huaming Li;Pulickel M. Ajayan;Hui Xu⁎
基于颗粒光催化剂的光催化分解水提供了一种可扩展的产生氢燃料的途径，同时也缓解了环境危机。要建立高效的光催化体系，基于主体表面的光催化剂表面修饰策略是影响反应分子吸附/活化能力和电荷传输效率的关键。作为层状共轭聚合物材料的一种，石墨化碳氮化物(g-C3N4)由于其独特的结构和迷人的性能，近年来在这一领域引起了广泛的科学兴趣。然而，与g-C3N4相比，有效的水分离仍然很难实现。令人鼓舞的是，表面修饰g-C3N4的策略在调整表面性质方面发挥了重要作用，从而提高了性能。对g-C3N4表面策略的总结、分类和机理理解具有重要意义。在本文中，我们首先概述了光催化分解水的基本原理。然后对提高g-C3N4光催化裂水效率的三种常用策略进行了分类，分别是表面调节法、功能化和组装法。作为重点，结合前人的研究，对g-C3N4表面策略的最新进展进行了详细的讨论，强调了光催化性能的提高与相应的表面策略之间的内在联系。最后，对人工光合作用的研究现状进行了总结，指出了人工光合作用面临的挑战。这篇综述强调了表面结构剪裁的关键作用，并为设计高效的光催化剂以利用表面策略分解水提供了思路。
Photocatalytic water splitting based on particulate photocatalysts offers a scalable pathway to generate hydrogen fuels while also mitigating environmental crisis. To establish high-efficiency photocatalytic system, strategies based on the modification of the host photocatalyst surface hold the key to affect the adsorption/activation ability of reaction molecules, and the efficiency of charge transport. As one type of layered conjugated polymer materials, graphitic carbon nitride (g-C3N4) has recently attracted extensive scientific interest in this research area owing to its unique structure and fascinating properties. However, the efficient water splitting is still far from easy over g-C3N4. Encouragingly, the surface strategies to modify g-C3N4play an important role in tuning the surface properties resulted in improved performance. The summary, classification and mechanism understanding of surface strategies on g-C3N4is of great significance. In this review, we firstly summarize the basic of photocatalytic water splitting. Then, three common strategies for improving the photocatalytic water splitting efficiency of g-C3N4are classified in surface regulation, functionalization and assembly. As a focus, recent advances of surface strategies on g-C3N4are discussed in detail combined with some previous studies, emphasizing the inner correlation between improved photocatalytic performance and corresponding surface strategy. Finally, a brief conclusion and the remaining challenges for artificial photosynthesis are presented. This review highlights the crucial role of the surface structure tailoring and provides ideas for designing highly efficient photocatalysts toward water splitting by surface strategies.
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