Leveraging doping and defect engineering to modulate exciton dissociation in graphitic carbon nitride for photocatalytic elimination of marine oil spill

doi:10.1016/j.cej.2022.135668

	Leveraging doping and defect engineering to modulate exciton dissociation in graphitic carbon nitride for photocatalytic elimination of marine oil spill
	Xia, Linhong 1; Sun, Zhaoli 1; Wu, Yuning 1; Yu, Xue-Fang 2; Cheng, Jianbo 2; Zhang, Kaisheng 3; Sarina, Sarina 4; Zhu, Huai-Yong 4; Weerathunga, Helapiyumi 4; Zhang, Lixue 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2022-07-01
卷号	439
关键词	Point-Defect Engineering Graphitic carbon nitride Oil spill Dopants Carbon vacancy
ISSN号	1385-8947
DOI	10.1016/j.cej.2022.135668
通讯作者	Yu, Xue-Fang(yuxuefang2008@gmail.com) ; Yang, Xiaolong(yangxl@qdu.edu.cn)
英文摘要	Limited light absorption ability and rapid photogenerated electron-hole recombination severely impedes applications of g-C3N4. Herein, highly efficient point-defect engineering including dual dopants as well as vacancy was adopted to modulate the photo-induced exciton dissociation kinetics. Specifically, P, O dopants and carbon vacancy modified 3D honeycomb-like POCVN was fabricated through facile one-pot polymerization with (NH4)(3)PO4 as P, O precursors. The obtained POCVN catalyst exhibited superior photocatalytic degradation performance for n-tetradecane under visible light illumination (38.1 %), which was 4.6 and 1.8 times higher than that of bulk g-C3N4 (8.2 %) and tubular g-C3N4 (21.1 %), respectively. The suppressed recombination of electrons and holes contributed to the superior catalytic performance compared to pristine g-C3N4, single P and single O doping g-C3N4. Structural analysis demonstrated P atoms may replace C atoms of N-C = N, O atom located at PO-C and carbon vacancies located at N = C-N-2 position at heptazine framework. Based on experimental and theoretical analysis, it was found P, O and Cv defects prefer to accumulate together in 3-trizine ring, which is conductive to the formation of localized defect state in the band gap region. It resulted in high exciton dissociation efficiency, thus, more reactive radicals were generated. Based on this, degradation path, interference parameter, reactive radicals and toxicity evaluation were investigated deeply and systematically. This work shed light on non-metal green ecological remediation material for marine oil spill.
资助项目	Natural Science Foundation of Shandong Province, China[ZR2019BB044] ; National Key Research Development Program of China Technology Boosts Economy 2020 ; State Key Research Development Program of China[2019YFC0408505] ; National Natural Science Foundation of China[21976182] ; Natural Science Foundation of Anhui Province[2008085 MB48] ; Research starts project of Weihai Institute of Innovation of Qingdao University
WOS关键词	TOTAL-ENERGY CALCULATIONS ; HYDROGEN EVOLUTION ; POLYMERIC PHOTOCATALYST ; DOPED G-C3N4 ; WATER ; DEGRADATION ; ENHANCEMENT ; NANOSHEETS ; ACID
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000783232900004
资助机构	Natural Science Foundation of Shandong Province, China ; National Key Research Development Program of China Technology Boosts Economy 2020 ; State Key Research Development Program of China ; National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province ; Research starts project of Weihai Institute of Innovation of Qingdao University
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131474]
专题	中国科学院合肥物质科学研究院
通讯作者	Yu, Xue-Fang; Yang, Xiaolong
作者单位	1.Qingdao Univ, Collaborat Innovat Ctr Shandong Marine Biobased F, Sch Chem & Chem Engn, State Key Lab Biofibers & Ecotextiles, 308 NingXia Rd, Qingdao 266071, Peoples R China 2.Yantai Univ, Sch Chem & Chem Engn, Lab Theoret & Computat Chem, 32 Qingquan Rd, Yantai 264005, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Environm Mat & Pollut Control Lab, HFIPS, Hefei 230031, Peoples R China 4.Queensland Univ Technol, Sch Chem & Phys, Brisbane, Qld, Australia
推荐引用方式 GB/T 7714	Xia, Linhong,Sun, Zhaoli,Wu, Yuning,et al. Leveraging doping and defect engineering to modulate exciton dissociation in graphitic carbon nitride for photocatalytic elimination of marine oil spill[J]. CHEMICAL ENGINEERING JOURNAL,2022,439.
APA	Xia, Linhong.,Sun, Zhaoli.,Wu, Yuning.,Yu, Xue-Fang.,Cheng, Jianbo.,...&Yang, Xiaolong.(2022).Leveraging doping and defect engineering to modulate exciton dissociation in graphitic carbon nitride for photocatalytic elimination of marine oil spill.CHEMICAL ENGINEERING JOURNAL,439.
MLA	Xia, Linhong,et al."Leveraging doping and defect engineering to modulate exciton dissociation in graphitic carbon nitride for photocatalytic elimination of marine oil spill".CHEMICAL ENGINEERING JOURNAL 439(2022).