Preparation of electrospun Cu-doped α-Fe 2 O 3 semiconductor nanofibers for NO 2 gas sensor
Source abstract
Abstract
Abstract Cu-doped α-Fe2O3 semiconducting nanofibers were prepared by electrospinning over a wide range of Cu molar ratios (fCu = 0–0.52 for fCu + fFe = 1) followed then by pyrolysis in air atmosphere to remove the organic template. Cu favored to substitute some of the Fe cations in the hematite structure to form crystalline cuprospinel (CuFe2O4) phase. The nanofibers exhibited an interesting p- to n-type transition of semiconducting behavior when fCu was increased above 0.23, as observed from electrical resistance change against oxidative NO2 gas of ppm levels (5–50 ppm) at 300 °C. The sensing response decreased from ∼ 2.59 to ∼ 1.52 when the CuFe2O4 concentration increases; nonetheless, the presence of CuFe2O4 facilitated adsorption of the NO2 gas, resulted in a shortened response time (up to 40%) as fCu was increased to 0.52.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Photocatalysis Techniques · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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