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首页> 外文期刊>Inorganic Chemistry Frontiers >High-efficiency photocatalytic water splitting by a N-doped porous g-C3N4 nanosheet polymer photocatalyst derived from urea and N,N-dimethylformamide
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High-efficiency photocatalytic water splitting by a N-doped porous g-C3N4 nanosheet polymer photocatalyst derived from urea and N,N-dimethylformamide

机译：通过尿素和N，N-二甲基甲酰胺的N掺杂多孔G-C3N4纳米片聚合物光催化剂的高效光催化水分裂

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摘要

In this work, layered N-doped graphitic carbon nitride (g-C3N4) porous nanosheets were successfully prepared by mixing the precursor of N,N-dimethylformamide (DMF) and urea through a simple one-step thermal copolymerization method. The doped-N plays a significant role in modifying the chemical and electronic structure of g-C3N4, which can decrease the migration pathway of the charges and suppress the recombination of the photogenerated carriers based on experimental characterization data and the density functional theory (DFT) calculation results. Through nanostructure engineering design, the as-prepared photocatalyst exhibits promoted specific surface area and enhanced light absorption capacity. Consequently, the as-prepared N-doped porous g-C3N4 nanosheets yield about 14 times higher H-2 evolution rate than pristine g-C3N4 nanosheets under visible light irradiation. The present study provides a simple and convenient method of nanostructure engineering for the synthesis of modified g-C3N4 with excellent photocatalytic activity to meet the sustainable demand of energy.
机译：在这项工作中，通过简单的一步热共聚方法将N，N-二甲基甲酰胺（DMF）和尿素的前体混合来成功制备层状的N掺杂石墨碳氮化物（G-C3N4）多孔纳米晶片。掺杂-N在改变G-C3N4的化学和电子结构方面发挥着重要作用，这可以降低电荷的迁移途径，并基于实验表征数据和密度泛函理论（DFT）来抑制光生载体的重组计算结果。通过纳米结构设计，制备的光催化剂表现出促进的特定表面积和增强的光吸收能力。因此，如制备的N-掺杂多孔G-C3N4纳米液的产量比在可见光照射下的丙氨酸G-C3N4纳米晶片比原始G-C3N4纳米液均产生约14倍。本研究提供了一种简单方便的纳米结构工程方法，用于合成改性的G-C3N4，具有优异的光催化活性，以满足能源的可持续需求。

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