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在水合法制备针铁矿过程中添加H3BO3,对合成的样品作红外光谱和比表面积分析,结果表明,共沉淀法合成的样品在1343 cm-1处有特征吸收峰,说明在针铁矿形成过程中,如果有H3BO3参与,则形成的氧化铁中存在Fe—O—B键结构,可能在氧化铁内部有一种新硼铁化合物生成。比表面积测定表明,含硼氧化铁比表面积增加4倍以上,反映了氧化铁与H3BO3并非机械混合物,其表面性质因为Fe与B反应而发生改变,B阻止氧化铁向高聚合态转变。
H3BO3 was added during the hydration process of goethite. The infrared spectrum and specific surface area of the synthesized samples were analyzed. The results showed that the sample synthesized by coprecipitation showed a characteristic absorption peak at 1343 cm-1, In the process, if H3BO3 is involved, there is a Fe-O-B bond in the formed iron oxide, possibly resulting in a new ferroboron compound in the iron oxide. The specific surface area measurements showed that the specific surface area of boron oxide increased by more than 4 times, reflecting the fact that iron oxide and H3BO3 are not mechanically mixed, the surface properties of which change due to the reaction of Fe and B, and that B prevents the conversion of iron oxide to a highly polymerized state.