Efficient Photocatalytic Overall Water Splitting Induced by the Giant Internal Electric Field of a g‐C3N4/rGO/PDIP Z‐Scheme Heterojunction,Advanced Materials

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Efficient Photocatalytic Overall Water Splitting Induced by the Giant Internal Electric Field of a g‐C3N4/rGO/PDIP Z‐Scheme Heterojunction
Advanced Materials ( IF 27.4 ) Pub Date : 2021-01-14 , DOI: 10.1002/adma.202007479
Xianjie Chen ₁ , Jun Wang ₂ , Yongqiang Chai ₃ , Zijian Zhang ₁ , Yongfa Zhu ₁

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A graphitic carbon nitride/rGO/perylene diimide polymer (g‐C₃N₄/rGO/PDIP) Z‐scheme heterojunction is successfully constructed to realize high‐flux charge transfer and efficient photocatalytic overall water splitting. A giant internal electric field in the Z‐scheme junction is built, enabling the charge separation efficiency to be enhanced dramatically by 8.5 times. Thus, g‐C₃N₄/rGO/PDIP presents an efficient and stable photocatalytic overall water splitting activity with H₂ and O₂ evolution rate of 15.80 and 7.80 µmol h⁻¹, respectively, ≈12.1 times higher than g‐C₃N₄ nanosheets. Meanwhile, a notable quantum efficiency of 4.94% at 420 nm and solar‐to‐hydrogen energy‐conversion efficiency of 0.30% are achieved, prominently surpassing many reported g‐C₃N₄‐based photocatalysts. Briefly, this work throws light on enhancing the internal electric field by interface control to dramatically improve the photocatalytic performance.

中文翻译：

ag-C3N4 / rGO / PDIP Z-方案异质结的巨大内部电场诱导的有效光催化总水分解

成功构建了石墨碳氮化物/ rGO / per二酰亚胺聚合物（g-C ₃ N ₄ / rGO / PDIP）Z型异质结，以实现高通量电荷转移和有效的光催化总水分解。Z方案结中建立了巨大的内部电场，使电荷分离效率显着提高了8.5倍。因此，g‐C ₃ N ₄ / rGO / PDIP表现出有效而稳定的光催化总水分解活性，H ₂和O _2的析出速率分别为15.80和7.80 µmol h ^-1，比g‐C ₃高约12.1倍N ₄纳米片。同时，在420 nm处有显着的量子效率为4.94％，从太阳能到氢的能量转换效率为0.30％，大大超过了许多报道的基于g-C ₃ N ₄的光催化剂。简而言之，这项工作为通过界面控制增强内部电场以显着改善光催化性能提供了启示。

更新日期：2021-02-16

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