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Enhanced photodecomposition of methylene blue in water with Sr1−xKxTiO3−δ@PC-polyHIPEs under UV and visible light

Gao, Yonghua, Zhang, Tao, Guo, Qipeng and Gao, Lizhen 2018, Enhanced photodecomposition of methylene blue in water with Sr1−xKxTiO3−δ@PC-polyHIPEs under UV and visible light, Journal of chemistry, vol. 2018, doi: 10.1155/2018/9365147.

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Title Enhanced photodecomposition of methylene blue in water with Sr1−xKxTiO3−δ@PC-polyHIPEs under UV and visible light
Author(s) Gao, Yonghua
Zhang, Tao
Guo, QipengORCID iD for Guo, Qipeng orcid.org/0000-0001-7113-651X
Gao, Lizhen
Journal name Journal of chemistry
Volume number 2018
Article ID 9365147
Total pages 10
Publisher Hindawi Publishing Corporation
Place of publication Cairo, Egypt
Publication date 2018-01
ISSN 2090-9063
2090-9071
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
DOPED SRTIO3
PHOTOCATALYTIC ACTIVITIES
EFFICIENT
NANOPARTICLES
IRRADIATION
POLYMERS
SUPPORTS
DEGRADATION
PERFORMANCE
GENERATION
Summary Photocatalytic method was investigated to remove water pollutant methylene blue (MB) produced in textile, plastic, and dye industries. PC-polyHIPEs were prepared by light-induced polymerization of dopamine in transparent polyHIPEs which were synthesized by polymerization within high internal phase emulsions. Sr1-xKxTiO3-δ (x = 0-0.5) nanoparticles were incorporated and adhered to PC-polyHIPEs to form Sr1-xKxTiO3-δ@PC-polyHIPEs for the first time. The catalysts were characterized by XRD, FTIR, TGA, UV-Vis DRS, and SEM and their photocatalytic properties for MB decomposition were measured over UV-Vis spectrometer. The PC-polyHIPEs were of interconnected porous structure with around 100 μm pores and 30 μm windows. Sr1-xKxTiO3-δ@PC-polyHIPEs showed excellent MB decomposition activity under either UV or visible light although Sr1-xKxTiO3-δalone worked only under UV light. When x = 0.3, Sr1-xKxTiO3-δ@PC-polyHIPEs showed the highest photocatalytic performance due to the existence of more oxygen vacancies. When the water solution with 50 mg L-1MB and 1.6 gcat. L-1Sr0.7K0.3TiO3-δ@PC-polyHIPEs was exposed to visible light for 160 min at room temperature, 88.3% of MB was decomposed. After being used for eight cycles, 87.6% activity of fresh Sr0.7K0.3TiO3-δ@PC-polyHIPEs still remained. The influences of salinity, temperature, and catalyst concentration on the catalytic activity were studied. For MB decomposition under visible light, the activation energy of Sr0.7K0.3TiO3-δ@PC-polyHIPEs was calculated to be 12.3 kJ mol-1and the kinetics analysis revealed that the photocatalysis followed the second-order reaction. These findings demonstrated that Sr1-xKxTiO3-δ@PC-polyHIPEs were an effective candidate for real application in decomposition of MB in water.
Language eng
DOI 10.1155/2018/9365147
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, Yonghua Gao et al.
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30111172

Document type: Journal Article
Collections: Institute for Frontier Materials
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.