Akademik Veri Yönetim Sistemi
ACS OMEGA, cilt.8, sa.32, ss.29635-29645, 2023 (SCI-Expanded)
Fluorescent pH-sensitive indicator dye, 8-hydroxypyrene-1,3,6-trisulfonicacid (HPTS), has become known as a preferred alternative for continuousand accurate monitoring of dissolved and/or gaseous CO2 in chemistry, medical, and biochemical research. The objective ofthis work is to enhance the HPTS dye's CO2 sensitivityin the presence of Zn@SnO2 and Sn@ZnO additive particles.Sol-gel synthesized metal oxide semiconductors (MOSs) werecharacterized using XRD, XPS, and SEM. The fluorophore dye and theMOS additives were embedded in the ethyl cellulose (EC) polymericmatrix to prepare the sensing thin films. The steady-state and decaykinetic measurements of the HPTS-based composites were obtained byPL spectroscopy for the concentration ranges of 0-100% p[CO2]. As expected, the addition of MOSs improves the sensor characteristics,specifically its CO2 sensing ability, linear response range,and relative signal change compared to the free form of HPTS. TheCO(2) sensitivities of the HPTS-based thin films were foundat 17.6, 23.2, and 40.9 for the undoped, Zn@SnO2,-doped,and Sn@ZnO-doped forms of the HPTS, respectively. Additionally, theresponse and recovery times of the HPTS-based sensor agent with Sn@ZnOwere measured as 10 and 460 s, respectively. The obtained resultsdemonstrate that materials composed of HPTS with MOSs are potentialcandidates for CO2 sensors.