Gas sensing properties of CuFe₂O₄ nanoparticles prepared by spray co‐precipitation method

Abstract

CuFe2O4 nanoparticles were prepared by using spray co‐precipitation method and annealed at 600°C. Crystal structure, microstructure and cation distribution of the sample were determined by applying of Rietveld refinement method based on synchrotron X‐ray diffraction data. Morphology was characterized by field emission scanning electron microscopy. The results indicated that the sample is single phase with inverse cubic spinel structure. Particle size was identified to be about 10 nm. The gas‐sensing properties of the copper nanoparticles were studied by using H2S as the analytic gas. It was found that the sensor based on the CuFe2O4 nanoparticles has good response in a large operating temperature range and even at near‐room temperature. The gas sensing mechanism of the studied material was discussed in detailed.

INFLUENCE OF DOPING Zn ON H2 SENSING CHARACTERISTICS OF NICKEL FERRITE NANOPARTICLES

“…Ferrite materials have numerous advantages for gas sensing applications. They exhibit high chemical stability, excellent mechanical resistance and are less susceptible to temperature variations when compared to conventional materials used in gas sensing devices [1][2][3][4][5][6][7][8]. Nickel ferrite is of interest for research gas sensing because of their special properties at the nanometer scale such as quantum effects, surface effects, easy doping other metals, etc.…”

“…The results showed a promising application of this material in gas-sensing technologies. In this work we focused on researching properties of ferritic materials and the potential implications of these findings for the development of gas-sensing materials [7,23].…”

Co‐Precipitation of Fe−Cu Bimetal Oxalates in an Aqueous Solution and Their Thermally Induced Decomposition

“…Subsequently, the thermally induced transformations of the bimetal Fe−Cu oxalate sample were studied by in‐situ XRD, ex‐situ TMS and N 2 adsorption at 77.4 K. The formed solid solution of the Fe−Cu oxalate can serve as a precursor for the preparation of amorphous Fe−Cu oxides or copper ferrite particles at relatively low temperatures, especially if compared to the classical solid‐state reaction approaches. Recently, the copper ferrite particles were studied for the use in a number of applications, e. g. water treatment, [40,41] gas sensors, [42–45] biomedicine, [46] energy storage [47–49] and catalysis (e. g. degradation of dyes [50–53] and other organic compounds, [54–57] or water gas shift [58] ). Additionally, the Fe−Cu materials were also studied in other catalytic reactions, e. g. the hydrogenation of CO 2 [59–62] …”

Tunable sulphur doping on CuFe2O4 nanostructures for the selective elimination of organic dyes from water

“…The results show that the particles are agglomerated and have irregular flacks-like morphologies. The particles have a tendency to agglomerate in clusters due to the attractive forces (i.e., magnetic dipole-dipole)50 . Whereas, the SEM results of as-prepared S-CuFe 2 O 4 catalysts are shown in Fig.4a-dat different magnifications (i.e., 5 µm, 2 µm, 1 µm and 500 nm).…”