Mesoporous <scp>WO<sub>3</sub></scp>‐Dot‐Decorated Flexible Electrodes for the Determination of Industrial Pollutants
This study demonstrates the fabrication of mesoporous tungsten trioxide (WO 3 )‐decorated flexible polyimide (PI) electrodes for the highly sensitive detection of catechol (CC) and hydroquinone (HQ), two environmental pollutants. Organic–inorganic composite dots are formed on flexible PI electrodes using evaporation‐induced self‐assembly (EISA) and electrospray methods. The EISA process is induced by a temperature gradient during electrospray, and the heated substrate partially decomposes the organic parts etched by O 2 plasma, creating mesoporous structures. Differential pulse voltammetry and cyclic voltammetry demonstrate a linear correlation between analyte concentration and the electrochemical response. Computational studies support the spontaneous adsorption of CC and HQ molecules on model WO 3 surfaces. The proposed sensor shows high sensitivity, a wide linear range, and a low detection limit for both individual and simultaneous determination of CC and HQ. Real sample analysis on river water confirms practical applicability. The WO 3 ‐decorated PI electrode presents an efficient and reliable approach for detecting these pollutants, contributing to environmental safety measures.
Authors
- Hyouk Ryeol Choi (ORCID: https://orcid.org/0000-0003-2902-7453)
- Hyeong‐U Kim (ORCID: https://orcid.org/0000-0002-0018-9603)
- Jin Kon Kim (ORCID: https://orcid.org/0000-0002-3872-2004)
- Hyunho Seok (ORCID: https://orcid.org/0000-0002-3189-5930)
- Keon‐Woo Kim (ORCID: https://orcid.org/0000-0001-5741-8895)
- Sihoon Son (ORCID: https://orcid.org/0009-0002-9052-335X)
- Gwan Hyun Choi (ORCID: https://orcid.org/0000-0002-5220-6081)
- Aneesh Koyappayil (ORCID: https://orcid.org/0000-0001-7872-8489)
- Anna Go (ORCID: https://orcid.org/0000-0003-0054-6188)
- Sachin Ganpat Chavan (ORCID: https://orcid.org/0000-0002-3052-5524)
- Sangho Yeon
- Min‐Ho Lee (ORCID: https://orcid.org/0000-0001-6142-4876)
- Taesung Kim (ORCID: https://orcid.org/0000-0001-6280-7668)
- Jin-Hyoung Lee (ORCID: https://orcid.org/0009-0003-0679-629X)
- Dong-Ho Lee
Institutions
- Pohang University of Science and Technology (KR)
- Korea Institute of Machinery & Materials (KR)
- Korea Institute of Science and Technology (KR)
- Chung-Ang University (KR)
- Sungkyunkwan University (KR)
- Korea University of Science and Technology (KR)
Publication Details
- Journal
- Energy & environment materials
- Published
- 2024-11-04
- DOI
- https://doi.org/10.1002/eem2.12842
- Citations
- 2
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.42
Funders
- National Research Foundation of Korea
- Korea Evaluation Institute of Industrial Technology