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A fiber‑optic sensor for in‑situ detection of methanol production rate in photocatalytic CO2 reduction reaction KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/444463
In the pursuit of achieving in-situ real-time detection of methanol production rate during the photocatalytic reduction of CO2, we developed a methanol sensor using a copolymer-coated fiber Bragg gratings. The theoretical model of methanol measurement by sensor was established. The effect of methanol-selective sensitive material and its thickness on the performance of the sensor were investigated. Humidity and temperature interference to sensor measurements was compensated. Furthermore, TiO2 photocatalyst was prepared and the photocatalytic reactor was constructed. The methanol production rate in the photocatalytic CO2 reduction process was monitored by the prepared sensor in-situ. The results highlight that the fiber Bragg grating methanol sensor with 600 nm-thick poly(N-isopropylacrylamide)/polymethyl-methacrylate coating showed a high sensitivity, lower limit of detection, fast response and recovery speed, and high selectivity. The methanol generation rate of TiO2 photocatalytic reduction of CO2 measured by gas chromatograph and prepared fiber Bragg grating methanol sensor was 1.42 and 1.53 μmol/g-cat·h, respectively, the error of the two detection methods was 7.86%. This highlights the efficacy of the developed fiber Bragg grating methanol sensor for real-time in-situ detection of the methanol production rate during the photocatalytic reduction of CO2.
Abstract
1 Introduction
2 Theoretical model
3 Experimental section
3.1 Chemicals
3.2 Sensor preparation
3.3 Photocatalytic material preparation
3.4 Detection system assembly
4 Results and discussion
4.1 Methanol sensor performance
4.2 In-situ detection of CH3OH generation rate in photocatalytic reduction of CO2
5 Conclusion
Acknowledgements
References
