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以脱脂棉为碳源,硝酸钴为前驱物,采用碳辅助法焙烧制备了粒径为50nm Co3O4纳米颗粒。用X射线衍射(XRD)对不同焙烧温度(200~600℃)下样品的物相、晶粒度进行了研究,并结合傅立叶红外光谱(FT-IR)对Co3O4物相演变进行了分析,确定中间产物前躯体是CoCO3;通过扫描电镜(SEM)和透射电镜(TEM)对制备的Co3O4样品的形貌、粒径进行了分析;同时,X射线能谱(EDS)和氮气吸附-脱附曲线测试等表明制备的Co3O4表面存在碳元素和孔结构,具有较大的比表面积,有利于提升其光解水制氢能力。
Taking cotton wool as carbon source and cobalt nitrate as precursors, 50nm-sized Co3O4 nanoparticles were prepared by carbon-assisted calcination. The phase and grain size of the samples were investigated by X-ray diffraction (XRD) at different calcination temperature (200-600 ℃), and the phase evolution of Co3O4 was analyzed by Fourier transform infrared spectroscopy (FT-IR) The precursor of the intermediate product was CoCO3. The morphology and particle size of the prepared Co3O4 samples were analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). At the same time, the EDS and N2 adsorption-desorption curves Tests showed that the surface of the prepared Co3O4 carbon elements and pore structure, with a larger specific surface area, is conducive to enhance their ability to hydrogenate water photolysis.