Facile synthesis of the direct Z-scheme sulfuretted NiFe-layered double hydroxides/CdS heterojunction for the improved photodegradation of model organic pollutants

被引:8
作者
Zhao, Guo-Qing [1 ]
Zou, Jiao [1 ]
Long, Xuan [1 ]
Hu, Jun [1 ]
Jiao, Fei-Peng [1 ]
机构
[1] Cent South Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China
基金
中国国家自然科学基金;
关键词
Degradation; CdS; Layered double hydroxides; Photocatalysis; Organic pollutants; PHOTOCATALYTIC ACTIVITY; GREEN SYNTHESIS; DEGRADATION; EVOLUTION; NANOCOMPOSITE; NANOPARTICLES; CONSTRUCTION; PERFORMANCE;
D O I
10.1016/j.jallcom.2022.166460
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
Exploiting efficient and reusable photocatalysts is a challenging matter for environmental pollutants re -mediation. Herein, the novel sulfuretted NiFe-layered double hydroxides/CdS (NiFeSx/CdS) Z-scheme pho-tocatalysts were rationally fabricated by in-situ solvothermal methods and the various characterization techniques, such as XRD, FT-IR, TEM, HR-TEM, XPS and UV-Vis DRS, demonstrated that the photocatalysts were successfully synthesized. Moreover, the NiFeSx/CdS100 heterostructure exhibited the optimal tetra-cycline hydrochloride (TC) removal efficiency of 85.77%, which was 3.10 and 2.42 times higher than the NiFeSx and CdS, respectively. In addition, the photodegradation performances of NiFeSx/CdS100 composites towards MB and RhB also reached up to 92.09% and 92.81%, respectively. The exceptional photodegradation activity was ascribed to the higher visible light utilization as well as the fast photo-induced electrons and holes separation efficiency. More importantly, the good configurational stability and recyclability of NiFeSx/ CdS were observed because of its strong synergistic effect, which provides the possibility of photocatalytic degradation of environmental pollutants for a long time. At last, based on the consideration of band position and supervising of active radicals, the legitimate Z-scheme photocatalytic mechanism was proposed. The current work supplies novel insights for exploitation of sustainable solar energy in environmental re -mediation. (c) 2022 Published by Elsevier B.V.
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页数:10
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