以沉淀法制备的纳米TiO2/Cr2O3复合粉体为原料,采用氨解法在800℃、氮化8h制备了纳米Ti0.8Cr0.2OxNy粉体。对纳米TiO2/Cr2O3复合粉体和合成的氧氮化物粉体用俄歇电子能谱(AES)、氮吸附比表面积(BET)、X射线衍射(XRD)、透射电子显微镜(TEM)、电子探针显微分析(EPMA)等方法进行了表征。结果表明:沉淀法可以制备出组成均匀的纳米TiO2/Cr2O3复合粉体,该复合粉体在800℃氮化8h可得到粒度为20～30nm的纯立方相Ti0.8Cr0.2OxNy纳米粉体,其比表面积达4674m2/g。
Nanocrystalline bimetallic metal oxynitride, Ti0.8Cr0.2OxNy, was synthesized by ammonolysis of
the nanosized Cr2O3/TiO2 composite powder at 800℃ for 8h. The precursor and the resulting oxynitride were characterized by Auger
electron spectroscope (AES), X-ray diffraction analysis (XRD), electron probe microanalysis (EPMA), transmission electron microscopy (TEM), and
BET surface area techniques. The results indicate that the as-synthesized oxynitride powder contains only Ti0.8Cr0.2OxNy with cubic
structure and its average particle size is 20～30nm, its specific surface area reaches 46.74m2/g.
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