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Copper oxides were prepared by direct heating and decomposing copper(Ⅱ) salts, such as Cu 2(OH) 2CO 3, Cu(NO 3) 2·3H 2O, Cu 2C 6H 4O 7·2 5H 2O, CuC 2O 4·2H 2O and CuAc 2·H 2O. The phase, surface area and catalytic activity of the oxides for H 2O 2 decomposition were investigated by means of XRD and BET measurements. It has been demonstrated that the characteristics of copper oxides obtained from different precursors are much different from each other. Monocomponent nano CuO, which has higher catalytic activity for H 2O 2 decomposition, can be prepared by direct heating and decomposing Cu 2(OH) 2CO 3. On the other hand, CuO in the decomposition products of the organic acid copper can be partially reduced to Cu 2O and Cu in the reducing atmosphere, and the Cu 2O component in the products has higher catalytic activity for H 2O 2 decomposition. 相似文献
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聚砜基膜成膜条件与富氧膜性能之间的关系 总被引:3,自引:0,他引:3
以聚砜为基膜材料,采用正交实验方法制备了平板超滤膜,然后在其表面涂敷改性聚二甲基硅氧烷后制得聚砜-硅橡胶复合型富氧膜,并研究了复合富氧膜性能与基膜成膜条件之间的关系。研究结果表明:当聚砜含量为20.15%,N-甲基吡咯烷酮含量为70.37%,聚乙二醇-600含量为9.48%时,制得的复合富氧膜的富氧浓度可达28.8%,渗透系数为7.02×10-4m3/(m2.S.MPa)。此外,还用扫描电镜观察复合富氧膜的基膜的结构特点。 相似文献
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