【摘 要】
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α-Fe2O3 nanoparticles doped with various molar fractions of Cr3+ were synthesized by a forced hydrolysis route and were characterized by X-ray diffraction(XRD)
【机 构】
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Department of Chemistry
论文部分内容阅读
α-Fe2O3 nanoparticles doped with various molar fractions of Cr3+ were synthesized by a forced hydrolysis route and were characterized by X-ray diffraction(XRD),scanning electronic microscopy(SEM),X-ray photoelectron spectroscopy(XPS) and inductive coupled plasma(ICP) techniques.The particles reserve shuttle-like shape in the presence of Cr3+.The crystallite sizes of Fe2O3 become smaller with the increased Cr3+ concentration in solution.The responses of Cr doped α-Fe2O3 sensors were studied towards reducing gases such as ethanol,methanol,acetone,gasoline and n-hexane.Gas sensors based on these materials have higher sensitivities and rapid response/recovery time to alcohol than to hydrocarbon.
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