SYNTHESIS AND STUDY OF GAS-SENSITIVE NANOSTRUCTURES OF THE Zn–Sn–O SYSTEM

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов

Z.V. Shomakhov¹  K.N. Punegova²  A.А. Ryabko²  A.I. Maximov²  S.S. Nalimova² 

[1] Kabardino-Balkarian State University named after H.M. Berbekov, Nalchik, Russia;Saint Petersburg Electrotechnical University «LETI», Saint Petersburg, Russia;

关键词: zinc oxide;    zinc stannate;    gas sensors;    nanorods;    x-ray photoelectron spectroscopy;   

DOI  :  10.26456/pcascnn/2021.13.910

来源: DOAJ

【 摘 要 】

Zinc oxide nanorods were synthesized by the hydrothermal method. The obtained samples were processed in an aqueous-alcohol solution of potassium stannate and urea at 170°C during different times. As a result, Zn–Sn–O nanostructures were obtained. The surface chemical composition of ZnO and Zn–Sn–O was studied using the X-ray photoelectron spectroscopy. Its sensitivity to vapors of isopropyl alcohol (1000 ppm) at 120°C, 180°C, 250°C was analyzed. The electron density redistribution during the Zn–Sn–O composite nanostructures formation manifests itself in the chemical shift of the O1s and Zn2p peaks. It confirm the rearrangement of chemical bonds when zinc atoms are replaced by tin ones. It was found that the sensitivity of composite structures to isopropyl alcohol vapors significantly exceeds that of ZnO in the entire temperature range under study. The improvement of gas-sensitive properties is associated with the presence of various types of surface centers in the Zn–Sn–O samples that participate in the adsorption and oxidation of isopropyl alcohol.

【 授权许可】

Unknown