Engineering oxygen-containing and amino groups into two-dimensional atomically-thin porous polymeric carbon nitrogen for enhanced photocatalytic hydrogen production†,Energy & Environmental Science

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Engineering oxygen-containing and amino groups into two-dimensional atomically-thin porous polymeric carbon nitrogen for enhanced photocatalytic hydrogen production†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-01-22 00:00:00 , DOI: 10.1039/c7ee03592f
Nannan Meng _{1,

2,

3,

4,

5} , Jian Ren _{6,

7,

8,

9,

10} , Yang Liu _{4,

11,

12,

13} , Yi Huang _{1,

2,

3,

4,

5} , Tristan Petit _{6,

7,

8,

9} , Bin Zhang _{1,

2,

3,

4,

5}

Affiliation

Polymeric carbon nitride (PCN) is a promising earth-abundant photocatalyst for solar energy conversion. However, the photocatalytic activities of PCN-based materials remain moderate because of their poor dispersion in water and their fast electron–hole recombination. Here, a facile two-step continuous thermal treatment strategy is presented to endow the bulk PCN nanosheets with an atomically-thin structure, strong hydrophilicity and Lewis basicity to dramatically enhance the photocatalytic hydrogen (H₂) generation performance. The formation of the oxygen-containing and amino groups in the atomically-thin PCN sheets improves the charge separation and provides rich active sites for the surface reaction. Such synergistic effects lead to a superior visible-light-driven photocatalytic activity and its H₂ evolution rate (1233.5 μmol h⁻¹ g⁻¹) is more than 11 times higher than the bulk PCN using Ni as a cocatalyst. Additionally, the H₂ evolution rate can reach 20948.6 μmol h⁻¹ g⁻¹ using Pt as a cocatalyst under AM1.5G solar irradiation.

中文翻译：

将含氧和氨基基团改造成二维原子薄的多孔聚合物碳氮，以提高光催化制氢能力†

聚合氮化碳（PCN）是用于太阳能转换的有前途的富地球光催化剂。但是，由于PCN基材料在水中的分散性差以及它们的电子-空穴快速复合，因此其光催化活性仍然保持中等水平。在这里，提出了一种简便的两步连续热处理策略，以使块状PCN纳米片具有原子薄的结构，强大的亲水性和Lewis碱性，从而显着增强了光催化氢（H ₂）的产生性能。原子薄的PCN片中含氧和氨基的形成改善了电荷分离，并为表面反应提供了丰富的活性位点。这种协同作用导致了优异的可见光驱动的光催化活性及其H₂析出速率（1233.5μmolh^-1 g^-1）是使用Ni作为助催化剂的PCN的11倍以上。另外，在AM1.5G太阳辐射下，使用Pt作为助催化剂，H_2的析出速率可以达到2098.46μmolh^-1 g^-1。

更新日期：2018-01-22

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