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Sulfur-doped graphitic carbon nitride decorated with zinc phthalocyanines towards highly stable and efficient photocatalysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
38903 45796 2016 9 PDF Available
Title
Sulfur-doped graphitic carbon nitride decorated with zinc phthalocyanines towards highly stable and efficient photocatalysis
Abstract

•Porous sulfur-doped g-C3N4 was prepared by a facile precursor-mediated method.•ZnTNPc/sulfur-doped g-C3N4 composites exhibited enhanced photocatalytic activity.•Sulfur-mediated structure was beneficial for separation of electron-hole pairs.

A series of sulfur-doped graphitic carbon nitride (g-CNS) materials were prepared by thermal condensation of a high-quality thiourea and melamine under air atmosphere. When zinc phthalocyanine (ZnTNPc) was combined with g-CNS, the photocatalytic performance of ZnTNPc/g-CNS was 4.4 times higher than that of pure ZnTNPc under visible irradiation. More importantly, the ZnTNPc/g-CNS composites exhibited higher photocatalytic activity for the degradation of methylene blue than ZnTNPc/g-C3N4 under the same conditions. Some typical scavengers were added to identify the active species in the photocatalytic oxidation process. Mott-Schottky curve reveals that the introduction of sulfur atoms in the graphitic carbon nitride not only narrows the band gap but also results in a downshift of the conduction band. The mechanism of the enhanced photocatalytic activity of ZnTNPc/g-CNS is based on the synergetic effect between ZnTNPc and g-CNS, which causes a rapid photo induced charge separation and suppresses the possibility of recombination of electron-hole pairs. Our effects will provide a novel system to increase the number of active species participated in the photocatalytic process, and thus enhance the photocatalytic activity of carbon-based catalysts.

Graphical abstractThe sulfur-doped g-C3N4 (g-CNS) combined with zinc phthalocyanine (ZnTNPc) was prepared and the photocatalytic degradation of methylene blue (MB) was investigated under visible irradiation.Figure optionsDownload full-size imageDownload high-quality image (116 K)Download as PowerPoint slide

Keywords
Carbon nitride; Sulfur doping; Zinc phthalocyanine; Photocatalysis
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Sulfur-doped graphitic carbon nitride decorated with zinc phthalocyanines towards highly stable and efficient photocatalysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 519, 5 June 2016, Pages 107–115
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us