Study on the effect of cuprite content on the electrical and CO2 sensing properties of cuprite-copper ferrite nanopowder composites

Abstract

The paper reports the synthesis and characterization of cuprite/copper ferrite nanopowder composites. The composites were synthesized using co-precipitation with oxalates precursor route. The phase and microstructure of the powder samples were characterized using X-ray diffraction, BET surface area analyzer and scanning electron microscopy. The powders were fabricated to device using a simple and efficient shaping technique. These devices were used further to carry out electrical property measurements in various atmospheres. The type of charge carriers were found by noting the sense of change in resistance when the air atmosphere on the sample was replaced with argon. CO 2 responses were reported for the whole series of composites. The effect of cuprite concentration on the CO 2 sensing performance was found to be independent of cuprite concentration up to certain limits (70% at).

Effect of synthesis method and morphology on the enhanced CO2 sensing properties of magnesium ferrite MgFe2O4

“…This was again kept in vacuum for 24 h and was then heated to 780°C for 1 h with a heating rate of 150°C/hour and was allowed to cool normally in the furnace. The detailed procedure is mentioned elsewhere [29].…”

Ethanol and Hydrogen Gas-Sensing Properties of CuO–CuFe2O4 Nanostructured Thin Films

“…On the other hand, copper based spinel oxides such as copper ferrite (CuFe 2 O 4 ) having n-type semiconductor properties was also reported to show response toward H 2 [18], LPG [19] and ethanol [20]. In our previous work, maximum response (R/R) of 86% was obtained by CuFe 2 O 4 nano powder toward 500 ppm of ethanol [21], and this pure copper ferrite also showed a good response of 10% toward CO 2 [22].…”

“…In particular, many authors have studied the combination of p-type CuO with various n-type oxides for CO 2 detection [23]- [26]. In the recent past, CuO/CuFe 2 O 4 composite thin films [27] and powders [22] having spinel phase were also reported as CO 2 gas sensing material.…”