Cu-doped ZnFe2O4 nano particles as well as preparation method and application thereof
A nanoparticle, znfe2o4 technology, applied in nanotechnology, chemical instruments and methods, instruments, etc., can solve the problems of poor selectivity and high working temperature, and achieve the effects of good crystallization, good dispersion and uniform morphology
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[0033] Example 1
[0034] The gas-sensitive coating of this embodiment is Cu doped ZnFe 2 O 4 Schematic diagram of the main structure of the nanoparticle cryogenic gas sensor, as figure 1 As shown, it includes a gas-sensitive coating 1; a platinum wire 2; a heating wire 3; a gold electrode 4; a ceramic tube 5; wherein the heating wire 3 passes through the ceramic tube 5 and welds its two ends to the base On the heating electrode, gold electrodes 4 are covered on both ends of the outer surface of the ceramic tube 5 and welded to the four measuring electrodes of the base through platinum wires 2. The gas-sensitive coating 1 is coated on the outer surface of the ceramic tube 5 and the gold electrode 4 Complete coverage; the composition of the gas-sensitive coating 1 is Cu doped ZnFe 2 O 4 Nano particles, Cu doped ZnFe 2 O 4 The nanoparticles have a single hexagonal phase spinel crystal structure, the spheres are uniform in size and have good individual dispersion, and the diameter is...
Example Embodiment
[0044] Example 2
[0045] The gas-sensitive coating of this embodiment is Cu doped ZnFe 2 O 4 Low-temperature gas sensors of nanoparticles, such as figure 1 As shown, it includes a gas-sensitive coating 1; a platinum wire 2; a heating wire 3; a gold electrode 4; a ceramic tube 5; wherein the heating wire 3 passes through the ceramic tube 5 and its two ends are welded to the base On the heating electrode, the gold electrode 4 is covered on both ends of the outer surface of the ceramic tube 5 and welded to the measuring electrode of the base through the platinum wire 2. The gas-sensitive coating 1 is coated on the outer surface of the ceramic tube 5 and the gold electrode 4 Fully covered; the composition of the gas-sensitive coating 1 is Cu doped ZnFe 2 O 4 Nano particles, Cu doped ZnFe 2 O 4 The nanoparticles have a single hexagonal phase spinel crystal structure, the spheres are uniform in size and have good individual dispersion, with a diameter between 30 and 50 nm and a large s...
Example Embodiment
[0053] Example 3
[0054] The gas-sensitive coating of this embodiment is Cu doped ZnFe 2 O 4 Low-temperature gas sensors of nanoparticles, such as figure 1 As shown, the gas-sensitive coating 1; platinum wire 2; heating wire 3; gold electrode 4; ceramic tube 5; wherein the heating wire 3 passes through the ceramic tube 5 and welds its two ends to the heating base On the electrode, the gold electrode 4 is covered on both ends of the outer surface of the ceramic tube 5 and welded to the measuring electrode of the base through the platinum wire 2. The gas-sensitive coating 1 is coated on the outer surface of the ceramic tube 5 and completely covers the gold electrode 4 The composition of the gas-sensitive coating 1 is Cu doped ZnFe 2 O 4 Nano particles, Cu doped ZnFe 2 O 4 The nanoparticles have a single hexagonal phase spinel crystal structure, the spheres are uniform in size and have good individual dispersion, with a diameter between 30 and 50 nm and a large specific surface area...
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