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A Dual Functional Conductive Hydrogel Containing Titania@Polypyrrole-Cyclodextrin Hybrid Nanotubes for Capture and Degradation of Toxic Chemical

Abstract

In this study, dual functional conductive hydrogels containing polypyrrole (PPy) nanotubes (NTs) functionalized with beta-cyclodextrin (bCD) and titania (TiO2) were produced and applied for both detection and removal of toxic substances. PPy, a representative conducting polymer was prepared in a form of nanotube (NT) and used for providing electrical conductivity. TiO2 nanoparticles were incorporated into the inside of the PPy NTs during the formation of PPy NTs, acting as a photocatalyst. Subsequently, beta-cyclodextrin (bCD) molecules were introduced as sensing media on the surface of PPy NTs via a simple surface treatment. The resulting TiO2@PPy-bCD hybrid NTs were embedded into agarose matrix to obtain a conductive hydrogel, simultaneously improving compatibility with substrates. The electrical properties of the hydrogel were investigated, showing electrical conductivity of approximately 10−3 S/cm and ohmic I-V relation on Au electrode. The sensing capability for a model analyte compound (methyl paraben, MPRB) down to 10 nM and photocatalytic degradation of methylene blue (MB) were demonstrated effectively. This study can provide important information for upcoming research activities for environmentally benign and toxic free versatile chemical sensors in diverse relevant fields.

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Acknowledgements

This research was supported by National Research Foundation of Korea, Grant Numbers NRF-2019R1F1A1058571. This work was also supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Advanced Production Technology Development Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (318104-3) and KRIBB Initiative Research Program.

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JB: corresponding, conceptualization, data curation, funding acquisition, investigation, methodology, project admin, supervision, writing draft. SJP: conceptualization, investigation, methodology, writing review editing. D-SS: investigation, writing review editing. JL: investigation, writing draft. SP: investigation. HJK: investigation. OSK: corresponding, conceptualization, funding acquisition, investigation, methodology, project admin, resources, supervision, writing review editing.

Corresponding authors

Correspondence to Joonwon Bae or Oh Seok Kwon.

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The authors declared that they have no conflict of interest.

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Bae, J., Park, S.J., Shin, DS. et al. A Dual Functional Conductive Hydrogel Containing Titania@Polypyrrole-Cyclodextrin Hybrid Nanotubes for Capture and Degradation of Toxic Chemical. BioChip J 15, 162–170 (2021). https://doi.org/10.1007/s13206-021-00015-2

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  • DOI: https://doi.org/10.1007/s13206-021-00015-2

Keywords

  • Hydrogel
  • Polypyrrole
  • Titania
  • Chemical sensor
  • Photocatalyst