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以TiO_2为研究对象,Cu(NO_3)_2?3H_2O和Ce(NO_3)_3?6H_2O为改性物质,采用溶胶-凝胶法制备Cu-Ce/TiO_2,利用正交设计结合RBF网络优化制备参数,对粒度分布最均匀的Cu-Ce/TiO_2进行表征与分析.结果表明,当扩展系数为0.55时,RBF网络具有最佳的逼近效果;Cu-Ce/TiO_2的最优制备工艺参数为:无水乙醇用量(无水乙醇与钛酸丁酯的体积比)4:1,pH=3.23,搅拌速率1970 r/min,所制粒度分布最均匀的Cu-Ce/TiO_2的d10=1141.91 nm,d50=1 737.58 nm,d90=2 723.89 nm,实测d90-d10=1 581.98nm,与预测值吻合较好,相对误差为1.52%,其光催化性能良好,光催化降解0.757μg/m L的甲醛水溶液240 min降解率为62.15%.
Taking TiO 2 as the research object, Cu (NO_3) _2 · 3H_2O and Ce (NO_3) _3 · 6H_2O as modified materials, Cu-Ce / TiO_2 was prepared by the sol-gel method and optimized by orthogonal design combined with RBF network. The results show that RBF network has the best approximation effect when the expansion coefficient is 0.55. The optimal preparation parameters of Cu-Ce / TiO 2 are anhydrous The volume ratio of ethanol to butyl titanate was 4: 1, pH = 3.23, stirring rate was 1970 r / min, the d10 = 1141.91 nm of the most uniform particle size distribution of Cu-Ce / 1 737.58 nm, d90 = 2 723.89 nm, the measured d90-d10 = 1 581.98 nm, which is in good agreement with the predicted value, the relative error is 1.52% and its photocatalytic performance is good. Photocatalytic degradation of 0.757 μg / min degradation rate of 62.15%.