Au surface plasmon resonance promoted charge transfer in Z-scheme system enables exceptional photocatalytic hydrogen evolution
Au surface plasmon resonance promoted charge transfer in Z-scheme system enables exceptional photocatalytic hydrogen evolution
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Au 表面等离子体共振促进 Z 型系统中的电荷转移，实现卓越的光催化析氢
DOI：
10.1016/j.apcatb.2022.121322
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发表时间：
2022-03-17
期刊：
影响因子：
--
通讯作者：
Wang, Chundong
中科院分区：
文献类型：
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作者：
Humayun, Muhammad;Ullah, Habib;Wang, Chundong
通过构建模拟自然光合作用的Z方案系统，可以实现高效的光催化水还原以释放氢气。然而，将合适的半导体与合适的减水潜力结合仍然具有挑战性。本文报道了一种基于Au修饰的5，10，15，20-四（4-三甲基氨基苯基）卟啉四（对甲苯磺酸盐）功能化的铁掺杂氮化碳的Z-结构体系。我们通过改变铁掺杂量制备氮化碳，然后用卟啉功能化得到异质结构光催化剂。由于强的界面接触和适当的能带排列，Z计划系统的制作。最后，我们沉积Au纳米粒子的表面上制作的Z-计划系统，以促进表面的氧化还原性能，通过有效的电荷载体的分离和转移。3Au-3 P/30 Fe-CN光催化剂在紫外-可见光照射下的产氢量为3172.20 μ mol·h（-1）·g（-1），具有良好的放氢活性。3Au-3 P/30 Fe-CN光催化剂在365和420 nm波长下的量子效率分别为7.2%和3.26%。实验观察到的效率，我们的光催化剂的支持密度泛函理论模拟的最低功函数和强大的静电相互作用的Z-计划系统的组成部分。
Highly efficient photocatalytic water reduction to evolve hydrogen can be achieved by the construction of Z scheme systems that mimics natural photosynthesis. However, coupling appropriate semiconductors with suitable water reduction potential still remains challenging. Herein, we report a novel Z-scheme system, based on the Au decorated 5,10,15,20-tetrakis(4-trimethylammoniophenyl) porphyrin tetra(p-toluene sulfonate) functionalized iron-doped carbon nitride. We prepared carbon nitride by varying the amount of iron dopant and then functionalized with porphyrin to obtain heterostructure photocatalyst. Owing to the strong interfacial contact and proper band alignment, a Z-scheme system is fabricated. Finally, we deposited Au nanoparticles over the surface of the as-fabricated Z-scheme system to promote the surface redox properties via efficient charge carrier's separation and transfer. The 3Au-3 P/30Fe-CN photocatalyst achieved excellent H2 evolution activity by producing 3172.20 mu mol h(-1) g(-1) under UV-visible irradiation. The calculated quantum efficiencies for 3Au-3 P/30Fe-CN photocatalyst at 365 and 420 nm irradiation wavelengths are 7.2% and 3.26%, respectively. The experimentally observed efficiency of our photocatalyst is supported by the density functional theory simulations in terms of the lowest work function and strong electrostatic interaction among the constituents of Z-scheme system.