光催化
纳米尺度
材料科学
电场
催化作用
分解水
层压
纳米技术
化学工程
复合材料
化学
有机化学
量子力学
物理
工程类
图层(电子)
作者
Zhidong Wei,Jiawei Yan,Weiqi Guo,Wenfeng Shangguan
出处
期刊:Chinese Journal of Catalysis
[China Science Publishing & Media Ltd.]
日期:2023-05-01
卷期号:48: 279-289
被引量:4
标识
DOI:10.1016/s1872-2067(23)64414-6
摘要
The light penetration effect will weaken the driving force of charge separation from phase to surface by the built-in electric field of nanoscale photocatalysts, like low-dimensional materials. Therefore, in this study, a novel nanoscale lamination catalyst design method was proposed using a polymeric carbon nitride (PCN)-nano polyhedral SrTiO3 core-shell structure catalyst (PCN-SrTiO3). The results showed that the nanoscale lamination effect could be generated by the formation of the N–Sr bond, which could regulate the built-in electric field of the PCN simultaneously. Moreover, detailed characterization indicated that the N–Sr bond, which facilitates the generation of N vacancies in PCN, could act as a novel channel for charge transfer. Both surface and interior core N-deficient PCN have been discovered, resulting in more positive and negative VB positions, respectively. Synchronously, the light absorption ability of the PCN-SrTiO3 samples increased. Consequently, the enhanced photocatalytic overall water splitting could be ascribed to the synergism of the built-in electric field regulation caused by the N-Sr formation-induced nanoscale lamination effect, which was favorable for energy flow adaption on the spatiotemporal scale.
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