Ionic Liquid-Based Optical and Electrochemical Carbon Dioxide Sensors

• Main Authors: Kamalakanta Behera, Shubha Pandey, Anu Kadyan, Siddharth Pandey
• Format: Article
• Language: English
• Published: MDPI AG 2015-12-01
• Series: Sensors
• Subjects: ionic liquids; carbon dioxide; sensors; optical sensors; electrochemical sensors
• Online Access: http://www.mdpi.com/1424-8220/15/12/29813

Due to their unusual physicochemical properties (e.g., high thermal stability, low volatility, high intrinsic conductivity, wide electrochemical windows and good solvating ability), ionic liquids have shown immense application potential in many research areas. Applications of ionic liquid in developing various sensors, especially for the sensing of biomolecules, such as nucleic acids, proteins and enzymes, gas sensing and sensing of various important ions, among other chemosensing platforms, are currently being explored by researchers worldwide. The use of ionic liquids for the detection of carbon dioxide (CO2) gas is currently a major topic of research due to the associated importance of this gas with daily human life. This review focuses on the application of ionic liquids in optical and electrochemical CO2 sensors. The design, mechanism, sensitivity and detection limit of each type of sensor are highlighted in this review.