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Open AccessArticle

The Impact of In Situ Polymerization Conditions on the Structures and Properties of PANI/ZnO-Based Multiphase Composite Photocatalysts

1
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, 10000 Zagreb, Croatia
2
Department of Physics, Faculty of Science, University of Zagreb, Bijenička, c. 32, 10000 Zagreb, Croatia
3
Ruđer Bošković Institute, P.O. Box 180, 10000 Zagreb, Croatia
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(4), 400; https://doi.org/10.3390/catal10040400
Received: 28 February 2020 / Revised: 31 March 2020 / Accepted: 2 April 2020 / Published: 5 April 2020
(This article belongs to the Special Issue Commemorative Issue in Honor of Professor Hugo de Lasa)
We have synthesized polyaniline/ZnO-based (PANI/ZnO) multiphase composite photocatalysts from acid media by a newly proposed two-step in situ polymerization. The first step of synthesis yielded PANI salt required for the PANI/ZnO synergistic effect. In the second step, the aniline oxidation continued, without ZnO dissolution, and it produced PANI base. Thus, both PANI salt and base phases in the composites were detected by FTIR and UV/Vis, while the presence of both ZnO and PANI polymer was confirmed by XRD. Additionally, XRD also showed Zn5(OH)8(NO3)2·2H2O and Zn(SO4)(H2O) phases in PANI/ZnO-based multiphase composites. Furthermore, the impact of the synthesis conditions on the morphology of the composites was investigated by FE-SEM. The images displayed that ZnO particles were encapsulated in PANI sheets that were formed by the aniline oligomers. Photocatalytic evaluation of PANI/ZnO-based catalysts (i.e., degradation of Acid Blue 25 dye) was conducted and the obtained results confirmed that all the studied composites experienced the PANI/ZnO synergistic effect. It was observed that the best photocatalytic properties were held by the PANI/ZnO_2 sample due to its optimal particle size. View Full-Text
Keywords: wastewater treatment; Acid Blue 25 dye; photocatalysis; solar irradiation; polyaniline/ZnO; composite photocatalysts; in situ synthesis; PANI/ZnO synergistic effect wastewater treatment; Acid Blue 25 dye; photocatalysis; solar irradiation; polyaniline/ZnO; composite photocatalysts; in situ synthesis; PANI/ZnO synergistic effect
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MDPI and ACS Style

Gilja, V.; Živković, I.; Klaser, T.; Skoko, Ž.; Kraljić Roković, M.; Hrnjak-Murgić, Z.; Žic, M. The Impact of In Situ Polymerization Conditions on the Structures and Properties of PANI/ZnO-Based Multiphase Composite Photocatalysts. Catalysts 2020, 10, 400. https://doi.org/10.3390/catal10040400

AMA Style

Gilja V, Živković I, Klaser T, Skoko Ž, Kraljić Roković M, Hrnjak-Murgić Z, Žic M. The Impact of In Situ Polymerization Conditions on the Structures and Properties of PANI/ZnO-Based Multiphase Composite Photocatalysts. Catalysts. 2020; 10(4):400. https://doi.org/10.3390/catal10040400

Chicago/Turabian Style

Gilja, Vanja; Živković, Ivana; Klaser, Teodoro; Skoko, Željko; Kraljić Roković, Marijana; Hrnjak-Murgić, Zlata; Žic, Mark. 2020. "The Impact of In Situ Polymerization Conditions on the Structures and Properties of PANI/ZnO-Based Multiphase Composite Photocatalysts" Catalysts 10, no. 4: 400. https://doi.org/10.3390/catal10040400

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