Enhanced sensitivity of fluorescence-based optical CO2 sensor by using HPTS/Chitosan/ZnO/GO/polymethyl methacrylate composites

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Materials Science: Materials in Electronics Pub Date : 2024-09-04 DOI:10.1007/s10854-024-13455-x

Vedat Azrak, Özlem Öter, Sibel Oğuzlar, Elif Ant Bursalı

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Abstract

This study was deeply focused on developing a novel gaseous CO₂ sensor based on the emission-based response of HPTS in polymethyl methacrylate/chitosan/ZnO/GO composites. HPTS is a well-known fluorescent dye that possesses a decreasing luminescence intensity at 520 nm to CO₂. The ion-pair form of the HPTS was used in different composites either in thin film and fiber form. Chitosan has received important attention due to its structural characteristics such as being biocompatible, biodegradable, cost-effective, non-toxic polymer, and its suitability for gas storage. It is a biopolymer having amine-rich groups which is appropriate especially for CO₂ adsorption purposes. Thus, we have employed chitosan and/or zinc oxide/graphene oxide for the first time either in solid or dissolved forms in the concerned polymethyl methacrylate based matrices for enhancing CO₂ sensitivity. The best results were obtained for the optimum concentration of chitosan containing thin film sensor slides which exhibited 75 times higher sensitivity than the ones which do not contain any chitosan. The addition of ZnO/GO composite revealed a 14% enhancement in the sensor response and it facilitated the fiber sensor formation by electrospinning process due to its increasing effect of electrical conductivity.The HPTS/Chitosan/ZnO/GO/polymethyl methacrylate sensing composites were stable for long periods that no significant changes in the fluorescence intensity and sensor characteristics were observed over 20 months.

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使用 HPTS/Chitosan/ZnO/GO/polymethyl methacrylate 复合材料提高基于荧光的二氧化碳光学传感器的灵敏度

本研究的重点是基于聚甲基丙烯酸甲酯/壳聚糖/氧化锌/有机玻璃复合材料中 HPTS 的发射响应，开发一种新型气态二氧化碳传感器。HPTS 是一种著名的荧光染料，在 520 纳米波长处对 CO2 的发光强度递减。HPTS 的离子对形式被用于不同的薄膜和纤维复合材料中。壳聚糖具有生物相容性、可生物降解、成本效益高、无毒聚合物等结构特性，并且适合气体储存，因此受到广泛关注。壳聚糖是一种具有富胺基团的生物聚合物，特别适合用于二氧化碳吸附。因此，我们首次将壳聚糖和/或氧化锌/氧化石墨烯以固体或溶解形式应用于相关的聚甲基丙烯酸甲酯基质中，以提高对二氧化碳的敏感性。最佳浓度的壳聚糖薄膜传感器幻灯片的灵敏度是不含任何壳聚糖的幻灯片的 75 倍。添加 ZnO/GO 复合材料后，传感器的响应增强了 14%，而且由于其导电性能的增强作用，还有助于通过电纺丝工艺形成纤维传感器。

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来源期刊

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.