مشخصات پژوهش

عنوان	Characterization and gas sensing properties of PPy–Zn2SnO4 nanocomposite with excellent long‑term stability
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Polypyrrole, Zn2SnO4 nanoparticles, Nanocomposite, Ethanol, Gas sensing
چکیده	Polypyrrole (PPy)–Zn2SnO4 nanocomposites have been prepared using dodecylbenzene sulfonic acid as a dopant by chemical oxidative polymerization for different weight percentages of Zn2SnO4 nanoparticles (0–20 wt%). The physicochemical characterization confirmed well-formed DBSA doped PPy–Zn2SnO4 nanocomposites with globule—like morphology and high porosity. Moreover, the UV–Vis spectrum revealed a blue shift for nanocomposites with respect to pure PPy, reflecting the modified electronic states as a result of effective interaction between PPy and Zn2SnO4 nanoparticles. All of the synthesized nanocomposites had a good thermal stability below 200 °C (< 4% weight loss). We applied the synthesized nanocomposites as a resistive sensor to detect the ethanol vapor. The results demonstrate that PPy–Zn2SnO4 (10 wt%) nanocomposite has the highest DC conductivity and response at room temperature. Also, it shows a linear response, appropriate recovery time and reproducibility. The excellent long-term stability (about 30% less than the initial experiment) after 7 months is observed for the sensor based on PPy–Zn2SnO4 (10 wt%), which makes it convenient for practical applications.
پژوهشگران	حسین میلانی مقدم (نفر دوم)، سیده آزاده حجازی جویباری (نفر اول)