A conjugated polymer coupled with graphitic carbon nitride for boosting photocatalytic hydrogen generation under visible light

被引:3
作者
Zhu, Xiaoyi [1 ]
Guan, Meili [2 ]
Gong, Rongcai [1 ]
Gong, Xuezhong [1 ]
Dai, Chunhui [3 ]
Tang, Jianguo [1 ]
机构
[1] Qingdao Univ, Inst Hybrid Mat, Natl Ctr Int Joint Res Hybrid Mat Technol, Natl Base Int Sci & Tech Cooperat Hybrid Mat, 308 Ningxia Rd, Qingdao 266071, Peoples R China
[2] Shandong Univ Sci & Technol, Coll Chem & Biol Engn, Qingdao 266590, Peoples R China
[3] East China Univ Technol, Jiangxi Key Lab Mass Spectrometry & Instrumentat, Nanchang 330013, Peoples R China
基金
中国国家自然科学基金;
关键词
MODIFIED G-C3N4; WATER; GRAPHENE; NANOCOMPOSITES; SEMICONDUCTOR; PERFORMANCE; CO2;
D O I
10.1039/d2se01660e
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, a soluble C-6-alkyl chain functionalized fluorene-dibenzothiophene-S,S-dioxide (C-6-FDTP) conjugated polymer was synthesized and further used to fabricate a C-6-FDTP/g-C3N4 hybrid through a facile solvent-evaporation process. The polymeric heterojunction in the hybrid is composed of the FDTP backbone and tri-s-triazine of carbon nitride via pi-pi stacking. The performance of photocatalytic H-2 generation under visible light over C-6-FDTP/g-C3N4 displays 15-fold higher H-2 generation rate with respect to bare g-C3N4. The H-2 generation rate even achieved 495 mu mol h(-1) g(-1) when Pt was used as a cocatalyst, which presented overwhelming advantages over pristine g-C3N4 under visible light irradiation. The enhancement mechanism was investigated by means of a series of characterization studies. Enhanced light harvesting promoted charge separation and charge transfer was identified, accounting for the superior photocatalytic activity. A type II heterostructure mechanism is assigned for the role of the C-6-FDTP conjugated polymer, and the polymeric pi-pi stacked heterojunction provided channels for charge separation and transfer. This work provides a research basis for the fabrication of efficient conjugated polymer photocatalysts with promising applications in industrial photocatalytic H-2 generation.
引用
收藏
页码:1537 / 1543
页数:7
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