Das, KK and Patnaik, S and Mansingh, S and Behera, A and Mohanty, A and Acharya, C and Parida, KM (2020) Enhanced photocatalytic activities of polypyrrole sensitized zinc ferrite/graphitic carbon nitride n-n heterojunction towards ciprofloxacin degradation, hydrogen evolution and antibacterial studies. In: Journal of Colloid and Interface Science, 561 . pp. 551-567.
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Abstract
Fusion of heterogeneous photocatalysts with conducting polymers has paid a rising stratagem in the field of photocatalysis owing to its biocompatibility and environment friendliness. In this work a series of polypyrrole (PPY) sensitized zinc ferrite/graphitic carbon nitride (ZFCN) n-n heterojunction (ZFCN@10PPY, ZFCN@20PPY, and ZFCN@30PPY) nanocomposite were fabricated by in-situ polymerization method. Due to low band gap of polypyrrole, it behaves as a photo-sensitizer, supplies surplus numbers of electrons to ZnFe2O4/g-C3N4 n-n heterojunction and improves the photocatalytic performance. The fabricated ZFCN@20PPY exhibits highest photocatalytic activity in comparison to others nanocomposites. The superior photocatalytic performance of ZFCN@20PPY was ascribed to the tunable band structure, synergistic effect of broad absorption upto NIR region, delayed electron-hole recombination and efficient charge transfer across the junction interface which has been well confirmed from UV–Vis DRS, PL and EIS measurement. Further the photocatalytic activity of ZFCN@20PPY was supported by both n-type and p-type photocurrent density i.e. 2.4 and 3.9 mA/cm2 respectively. ZFCN@20PPY shows good photocatalytic performance towards ciprofloxacin degradation (92%) and generation of hydrogen energy (567 μmol). Along with pollutant degradation and energy production ZFCN@20PPY also shows its potential towards antibacterial activities against human pathogenic bacteria like Escherichia coli. These newly designed polymer sensitized n-n heterojunction may offer a promising strategy for maximum light absorption and be authoritative in meeting the environmental claims in the future. © 2019 Elsevier Inc.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Colloid and Interface Science |
| Publisher: | Academic Press Inc. |
| Additional Information: | The copyright for this article belongs to the Academic Press Inc. |
| Keywords: | Antibiotics; Biocompatibility; Biodegradation; Carbon nitride; Charge transfer; Conducting polymers; Energy gap; Escherichia coli; Ferrite; Heterojunctions; Image enhancement; Light absorption; Nanocomposites; Nitrides; Polypyrroles; Zinc compounds, Anti-bacterial activity; Ciprofloxacin; Electron-hole recombination; Environment friendliness; Heterogeneous photocatalysts; Hydrogen evolution; Photocatalytic performance; ZFCN@20PPY, Photocatalytic activity, ciprofloxacin; hydrogen; nanocomposite; polypyrrole; unclassified drug; zinc ferrite graphitic carbon nitride; antiinfective agent; ciprofloxacin; ferric ion; ferrite; graphite; graphitic carbon nitride; nanocomposite; nitrogen derivative; polymer; polypyrrole; pyrrole derivative; zinc derivative, antibacterial activity; Article; comparative study; controlled study; degradation kinetics; diffuse reflectance spectroscopy; drug absorption; electron; energy yield; Escherichia coli; hydrogen evolution; impedance spectroscopy; light absorption; nanofabrication; nonhuman; photocatalysis; photosensitization; polymerization; priority journal; Raman spectrometry; structure analysis; synergistic effect; ultraviolet visible spectroscopy; catalysis; chemistry; drug effect; light; photochemistry, Anti-Bacterial Agents; Catalysis; Ciprofloxacin; Escherichia coli; Ferric Compounds; Graphite; Hydrogen; Light; Nanocomposites; Nitrogen Compounds; Photochemistry; Polymers; Pyrroles; Zinc Compounds |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 02 Feb 2023 05:24 |
| Last Modified: | 02 Feb 2023 05:24 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79711 |
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