DataVXENERGY & ENVIRONMENTAL MATERIALSPaper
journal article·2025-03Open access

Mesoporous WO3‐Dot‐Decorated Flexible Electrodes for the Determination of Industrial Pollutants

Aneesh Koyappayil, Hyunho Seok, Gwan Hyun Choi, Sachin Chavan, Sangho Yeon, Sihoon Son, Anna Go, Jinhyoung Lee, Keon‐Woo Kim, Dongho Lee, Hyun‐Bin Choi, Hyeong‐U Kim, Jin Kon Kim, Taesung Kim, Min‐Ho Lee

ENERGY & ENVIRONMENTAL MATERIALS· Volume 8· Issue 2
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Abstract

This study demonstrates the fabrication of mesoporous tungsten trioxide (WO3)‐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 O2 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 WO3 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 WO3‐decorated PI electrode presents an efficient and reliable approach for detecting these pollutants, contributing to environmental safety measures.
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Research context

Composites

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Electrochemical Analysis and Applications · Analytical Chemistry and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Integrative Engineering Chung‐Ang University Heuseok‐dong, Dongjak‐Gu Seoul 06974 South Korea

SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University Suwon 16419 Korea

Materials Architecturing Research Center Korea Institute of Science and Technology (KIST) Seoul 02792 Korea

School of Mechanical Engineering Sungkyunkwan University Suwon 16419 Korea

National Creative Research Initiative Center for Hybrid Nano Materials by High‐level Architectural Design of Block Copolymer Pohang University of Science and Technology (POSTECH) Pohang Gyungbuk 37673 Korea

Department of Semiconductor Convergence Engineering Sungkyunkwan University Suwon 16419 Korea

Semicondcutor Manufacturing Research Center Korea Institute of Machinery and Materials (KIMM) Daejeon 34103 Korea

Department of Nano‐Mechatronics University of Science and Technology (UST) Daejeon 34113 Korea

Funding

National Research Foundation of Korea · Korea Evaluation Institute of Industrial Technology

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