Preparation of conjugated polyvinyl chloride/TiO2 nanotubes for Rhodamine B photocatalytic degradation under visible light

BACKGROUND Efficient and stable photocatalysts are essential for the removal of organic dyes in wastewater. Here, the nanocomposites of conjugated polyvinyl chloride supported on hydrothermally synthesized titanium dioxide nanotubes (cPVC/TNTs) were fabricated by a simple annealing process. Their ph...

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Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) 2020-10, Vol.95 (10), p.2707-2714
Main Authors: Bui, Dai‐Phat, Pham, Huan, Cao, Thi, Pham, Viet
Format: Article
Language:English
Subjects:
Chlorides
Color removal
conjugated polymer
Electrochemical analysis
Electrochemistry
Functional groups
hydrothermal
Infrared spectroscopy
Morphology
Nanocomposites
Nanotechnology
Nanotubes
Photocatalysis
Photodegradation
Physical characteristics
Polyvinyl chloride
Raman spectroscopy
Reaction mechanisms
Rhodamine
Spectrum analysis
Titanium dioxide
Transmission electron microscopy
Ultraviolet reflection
visible light
Wastewater
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Summary:BACKGROUND Efficient and stable photocatalysts are essential for the removal of organic dyes in wastewater. Here, the nanocomposites of conjugated polyvinyl chloride supported on hydrothermally synthesized titanium dioxide nanotubes (cPVC/TNTs) were fabricated by a simple annealing process. Their photocatalytic ability and reaction mechanisms were also investigated via degrading Rhodamine B (RhB) under different conditions. RESULTS The functional groups, instinct characteristic bonding, crystallinity, and morphology were characterized by the Fourier‐transform infrared spectroscopy (FTIR), Raman spectroscopy, X‐ray diffraction (XRD), and transmission electron microscopy (TEM), respectively. These results confirmed the success of nanocomposites preparation. In addition, the band energy structure of materials was investigated by electrochemical analysis (ECA) and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS). The band structure and photocatalytic experiments showed that the 10% cPVC/TNTs could work under visible light and degrade 90% of RhB, while cPVC and TNTs lack this performance. The vital role of both electrons and holes were confirmed with the evidence obtained from the trapping experiment. CONCLUSION The combination of cPVC and TNTs significantly improved photocatalytic performance and stability. Their properties and reaction mechanisms were detailly described to further other research. © 2020 Society of Chemical Industry
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.6466