| Info. | Vol.15 - No.2 (2021.06.20) |
|---|---|
| Title | A Dual Functional Conductive Hydrogel Containing Titania@Polypyrrole-Cyclodextrin Hybrid Nanotubes for Capture and Degradation of Toxic Chemical |
| Authors | Joonwon Bae1, Seon Joo Park2, Dong-Sik Shin3, Jiyeon Lee2, Soyeon Park1, Hye Jun Kim1, Oh Seok Kwon2 |
| Institutions | 1Department of Applied Chemistry, Dongduk Women’s University, Seoul 02748, Republic of Korea 2Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-Ro, Yuseong-Gu, Daejeon 34141, Republic of Korea 3Department of Chemical and Biological Engineering, Sookmyung Women’s University, Seoul 04310, Republic of Korea |
| 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 10−3S/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. |
| Keyword | Hydrogel · Polypyrrole · Titania · Chemical sensor · Photocatalyst |
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