Synthesis and Structural Investigations of Ag‐Added BaTiO₃‐CuO Mixed Oxide for CO₂ Gas Sensing

Abstract

Compositions having the general formula BaTiO 3 -CuO + x wt% Ag, where x = 0, 1, 1.5, and 2 have been prepared by solid state ceramic processing and sintered at 500 and 700• C for 5 h. Thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), infrared absorption spectra (IR), and scanning electron microscopy (SEM) were used to characterize the obtained sensor pellets. It was found that no solid state reaction took place between BaTiO 3 and CuO during sintering process. The sensitivity of the prepared sensors to CO 2 gas increases with increasing sintering temperature and Ag content. The correlation between Ag content at different sintering temperature and structure characterization is discussed.

CuO–NiO/Co3O4 hybrid nanoplates as highly active catalyst for ammonia borane hydrolysis

“…In the FT-IR spectra (Fig. 2b), theabsorptionpeak at 574and 667 cm 1 can be assigned to the Co3O4 spinel oxide; besides the bands for Co3O4, stretching bonds of CueO and NieO at 418 and 443 cm 1 respectively were also observed, indicating that the NiO and CuO were formed on Co3O4 [27,28].…”