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首页> 外文期刊>Catalysis science & technology >Interfacial TiN bonding of a g-C3N4/TiH1.92 type-II heterojunction photocatalyst significantly enhanced photocatalytic hydrogen evolution from water splitting
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Interfacial TiN bonding of a g-C3N4/TiH1.92 type-II heterojunction photocatalyst significantly enhanced photocatalytic hydrogen evolution from water splitting

机译：G-C3N4/TIH1.92的界面TIN键合，II型异质结光催化剂显着增强了从水分裂中的光催化氢的进化

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摘要

Graphitic carbon nitride (g-C3N4), an excellent metal-free photocatalyst, is a promising candidate for overall water splitting under visible light illumination. However, some drawbacks of g-C3N4, such as poor separation and transfer efficiency of photogenerated charge carriers, restrain its photocatalytic applications. Efficient photocatalytic water splitting could be achieved by combining g-C3N4 with well suited divergent semiconductors to form a type-II heterojunction system. Herein, we fabricate a highly efficient type-II heterojunction system based on exfoliated titanium hydride (TiH1.92) nanoparticles (NPs) and g-C3N4 nanosheets for photocatalytic water splitting. Through TiN bonding at the interface between g-C3N4 and TiH1.92 NPs, g-C3N4 nanosheets can be coupled with TiH1.92 NPs. Owing to their specific type-II heterostructures, strong interfacial interaction and band alignment, an efficient photocatalytic hydrogen evolution rate of 75.55 μmol h−1 is obtained, which is 4.29-fold higher than that of bare g-C3N4. The developed g-C3N4/TiH1.92 type-II heterostructures exhibit a quantum efficiency of 6.78% at λ = 420 nm. In general, this study further provides a creative route to design and develop other novel type-II heterostructured photocatalysts for efficient H2 evolution under visible light illumination.
机译：优秀的无金属光催化剂，氮化石氮化碳（G-C3N4）是在可见光照明下进行总体水分分裂的有前途的候选者。但是，G-C3N4的一些缺点，例如光源性载体的分离和转移效率差，可以限制其光催化应用。通过将G-C3N4与适合良好的发散半导体组合以形成II型异质结系统，可以实现有效的光催化水分裂。本文中，我们基于去角质钛（TIH1.92）纳米颗粒（NPS）和G-C3N4纳米片制造高效的II型异质结系统，用于光催化水。通过在G-C3N4和TIH1.92 NP之间的接口上进行TIIN键，G-C3N4纳米片可以与TIH1.92 NPS结合。由于其特异性II异质结构，强界面相互作用和带对齐，因此获得了有效的光催化氢的演化速率，为75.55μmolH-1，比裸G-C3N4高4.29倍。开发的G-C3N4/TIH1.92 II型异质结构在λ= 420 nm时的量子效率为6.78％。通常，这项研究进一步提供了一条创造性的途径，以设计和开发其他新型II异质结构的光催化剂，以在可见光照明下有效地进行H2进化。

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