Air bubbles induced piezophotocatalytic degradation of organic pollutants using nanofibrous poly(vinylidene fluoride)-titanium dioxide hybrid

Arulappan Durairaj; Subramaniyan Ramasundaram; Thangavel Sakthivel; Subramanian Ramanathan; Ashiqur Rahaman; Byungki Kim; Samuel Vasanthkumar

doi:10.1016/j.apsusc.2019.07.127

Air bubbles induced piezophotocatalytic degradation of organic pollutants using nanofibrous poly(vinylidene fluoride)-titanium dioxide hybrid

Arulappan Durairaj, Subramaniyan Ramasundaram, Thangavel Sakthivel, Subramanian Ramanathan, Ashiqur Rahaman, Byungki Kim, Samuel Vasanthkumar

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Flexible and porous poly (vinylidene fluoride)-titanium dioxide (PVDF-TiO₂) hybrid prepared by sequential electrospinning and electrospraying was investigated for piezoelectric-driven semiconductor photocatalysis (PDSP) application. FT-IR and XRD results confirmed the direct preparation of nanofibrous PVDF layer with piezo-responsive β- and γ-crystalline phases by electrospinning. FE-SEM and FTIR spectra discerned that the fibrous structure of PVDF support and its piezo crystalline forms were preserved even after the process of TiO₂ NPs deposition. In complementary to the visual observation by FE-SEM, XPS, and EDS, spectroscopical results confirmed the deposition of TiO₂ NPs on the piezo responsive PVDF support. XPS studies confirmed that 53% of the hybrid surface was covered by TiO₂ NPs. Under UV irradiated conditions, water bubble induced piezo activity enhanced the degradation of methylene blue (MB) by 99%. The PDSP efficacy of the hybrid was proportional to the extent of air bubble supply. The % of total organic carbon removal was 66, which indicate the mineralization of MB. The non-selective [rad]OH mediated photooxidation by this hybrid was found to be also suitable for degrading non-dye pollutants such as 4-aminophenol. Overall, PVDF-TiO₂hybrid was found to be a potential PDSP useful for water remediation and detoxification.

Original language	English
Pages (from-to)	1268-1277
Number of pages	10
Journal	Applied Surface Science
Volume	493
DOIs	https://doi.org/10.1016/j.apsusc.2019.07.127
State	Published - 1 Nov 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Funding

The authors thank the Management and Administration of Karunya University for their support and help. The authors are grateful to Department of Science and Technology, Govt. of India for their financial support. S. Ramasundaram. A. Rahaman, and B. Kim acknowledge Korea Ministry of Education, Science and Technology for their financial support via National Research Foundation of Korea for the priority Research Centers Program (NRF-2018R1A6A1A03025526), and in part by 2019 The Faculty Education and Research Promotion Funding from the Korea University of Technology and Education. There are no conflicts to declare. The authors thank the Management and Administration of Karunya University for their support and help. The authors are grateful to Department of Science and Technology , Govt. of India for their financial support. S. Ramasundaram. A. Rahaman, and B. Kim acknowledge Korea Ministry of Education, Science and Technology for their financial support via National Research Foundation of Korea for the priority Research Centers Program ( NRF-2018R1A6A1A03025526 ), and in part by 2019 The Faculty Education and Research Promotion Funding from the Korea University of Technology and Education .

Funders	Funder number
Department of Science and Technology, Ministry of Science and Technology, India
Korea University of Technology and Education
National Research Foundation of Korea	NRF-2018R1A6A1A03025526
Ministry of Education, Science and Technology

Keywords

Degradation
Electrospraying
PVDF-TiO
Photocatalysis
Piezoelectric effect

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10.1016/j.apsusc.2019.07.127

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abstract = "Flexible and porous poly (vinylidene fluoride)-titanium dioxide (PVDF-TiO2) hybrid prepared by sequential electrospinning and electrospraying was investigated for piezoelectric-driven semiconductor photocatalysis (PDSP) application. FT-IR and XRD results confirmed the direct preparation of nanofibrous PVDF layer with piezo-responsive β- and γ-crystalline phases by electrospinning. FE-SEM and FTIR spectra discerned that the fibrous structure of PVDF support and its piezo crystalline forms were preserved even after the process of TiO2 NPs deposition. In complementary to the visual observation by FE-SEM, XPS, and EDS, spectroscopical results confirmed the deposition of TiO2 NPs on the piezo responsive PVDF support. XPS studies confirmed that 53% of the hybrid surface was covered by TiO2 NPs. Under UV irradiated conditions, water bubble induced piezo activity enhanced the degradation of methylene blue (MB) by 99%. The PDSP efficacy of the hybrid was proportional to the extent of air bubble supply. The % of total organic carbon removal was 66, which indicate the mineralization of MB. The non-selective [rad]OH mediated photooxidation by this hybrid was found to be also suitable for degrading non-dye pollutants such as 4-aminophenol. Overall, PVDF-TiO2hybrid was found to be a potential PDSP useful for water remediation and detoxification.",

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Air bubbles induced piezophotocatalytic degradation of organic pollutants using nanofibrous poly(vinylidene fluoride)-titanium dioxide hybrid

Abstract

Bibliographical note

Funding

Keywords

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