One-pot, self-assembled hydrothermal synthesis of 3D flower-like CuS/g-C3N4 composite with enhanced photocatalytic activity under visible-light irradiation

被引:98
|
作者
Khan, Azam [1 ]
Alam, Umair [1 ]
Raza, Waseem [1 ]
Bahnemann, D. [2 ,3 ]
Muneer, M. [1 ]
机构
[1] Aligarh Muslim Univ, Dept Chem, Aligarh 202002, Uttar Pradesh, India
[2] Leibniz Univ Hannover, Inst Tech Chem, D-30167 Hannover, Germany
[3] St Petersburg State Univ, Photoact Nanocomposite Mat, Ulyanovskaya Str, St Petersburg 198504, Russia
关键词
Flower-like CuS/g-C3N4 composites; Photocatalysis; Methylene Blue degradation; Visible-light-active photocatalyst; EFFICIENT PHOTOCATALYST; FACILE FABRICATION; CO2; REDUCTION; HYBRID; NANOCOMPOSITE; PERFORMANCE; NANOSHEETS; G-C3N4; OXIDE; HETEROJUNCTIONS;
D O I
10.1016/j.jpcs.2017.10.032
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Novel visible-light-driven 3D flower-like CuS/g-C3N4 composites have been synthesized by different wt% of CuS using hydrothermal method and characterized by standard analytical techniques such as XRD, FTIR, XPS, BET, UV-Vis DRS spectroscopy, SEM-EDS, and TEM. SEM and TEM analyses showed an intimate interfacial contact between flower-like CuS and g-C3N4 sheet. The synthesized composite materials (CuS/g-C3N4) showed excellent photocatalytic activity for the decolorization of methylene blue (MB) in aqueous suspension under visible-light irradiation, compared with pure CuS and g-C3N4. Among various composites of CuS/g-C3N4, 10 wt% of CuS showed highest photocatalytic activity for the decolorization of dye (MB). This remarkably improved photo catalytic performance of the synthesized materials could be attributed to the synergistic interaction between CuS and g-C3N4, leading to prolonged lifetime of photo-generated e(-) and h(+) pair through the Z-scheme system. A probable Z-scheme mechanism explaining the origin of enhanced performance of the composite material has been proposed. This work not only provides a facile way to synthesize 3D flower-like heterostructure, but also renders rational design for the development of highly efficient Z-scheme photocatalytic systems.
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页码:59 / 68
页数:10
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