Water-assisted ions in situ intercalation for porous polymeric graphitic carbon nitride nanosheets with superior photocatalytic hydrogen evolution performance
Water-assisted ions in situ intercalation for porous polymeric graphitic carbon nitride nanosheets with superior photocatalytic hydrogen evolution performance
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DOI：
10.1016/j.apcatb.2016.03.002
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发表时间：
2016-08-05
影响因子：
22.1
通讯作者：
Dong, Guangzhi
中科院分区：
文献类型：
--
作者：
Ma, Longtao;Fan, Huiqing;Dong, Guangzhi
二维层状聚合物氮化碳具有独特的电子结构和高比表面积，在可见光驱动光催化分解水分子制氢方面显示出巨大的潜力。本文采用锂离子原位插层法制备聚合物氮化碳纳米片材，采用原位插层法制备聚合物氮化碳纳米片材。多孔纳米片具有厚度为2~3 nm的二维层状结构，具有2~3 nm的高密度面内孔，比表面积较大(186.3 m(2)g(-1))，禁带宽度较大(增加0.16 eV)，延长了载流子寿命，增强了电子传输能力，增加了载流子密度，改善了光电流响应，从而显著提高了光催化活性。结果表明，聚碳氮化物材料的2D孔道结构、高比表面积和独特的电子结构对其光催化性能起着至关重要的作用。(C)2016爱思唯尔B.V.保留所有权利。
Two-dimension layered polymeric carbon nitride possessing unique electronic structure and high specific surface area exhibits immense potentials for visible light driven photocatalytic activity for hydrogen production by the decomposition of water molecules. Herein, porous polymeric carbon nitride nanosheets were obtained by lithium chloride ions in situ intercalating bulk materials in thermal polycondensation process and followed by liquid exfoliation in water. The porous nanosheets show two-dimension layered structure with the thickness of 2-3 nm, a high density in-plane pores with 2-3 nm diameter, a higher surface area (186.3 m(2)g(-1)), enlarged bandgap (by 0.16 eV), prolonged charge carrier lifetime, enhanced electronic transport ability, increased charge carrier density and improved photocurrent responses, which could significantly give rise to photocatalytic activity. The results highlight the crucial role of 2D porous structure, high specific surface area and unique electronic structure on the photocatalytic performance of polymeric carbon nitride materials. (C) 2016 Elsevier B.V. All rights reserved.