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基于正交设计与多元非线性回归分析Cu-Ce/TiO2的光-湿性能

Analysis of Cu-Ce/TiO2 photocatalytic-moisture performance based on orthogonal design and multivariate nonlinear regression

    摘要
  • 摘要: 以Cu （NO3）2 · 3H2O和Ce （NO3）3 · 6H2O为改性剂，采用溶胶-凝胶法制备Cu-Ce/TiO2。通过正交设计与多元非线性回归结合分析Cu-Ce负配载量、Cu与Ce摩尔比、烧结温度对Cu-Ce/TiO2湿性能和光催化性能的显著性。获得优化Cu-Ce/TiO2制备参数，运用SEM、LPSA、XRD和UV-Vis对优化Cu-Ce/TiO2进行性能研究和表征分析。结果表明，各因素对Cu-Ce/TiO2湿性能和光催化性能的影响重要程度顺序：Cu-Ce负配载量 > Cu与Ce摩尔比 > 烧结温度 > 空白因素。优化Cu-Ce/TiO2制备参数：Cu-Ce负配载量为3.26%、Cu与Ce摩尔比为0.87：1、烧结温度为505℃。优化Cu-Ce/TiO2的湿性能为0.0869 g · g-1，光催化性能为50.7%。Cu-Ce/TiO2形貌较好，粒径分布为1 183.68~3 916.05 nm，促使吸收边带发生红移。

     

    Abstract: With Cu(NO3)2 · 3H2O and Ce(NO3)3 · 6H2O as the modifier, Cu-Ce/TiO2 was made by sol-gel method. Cu-Ce doped loading, Cu-Ce molar ratio and sintering temperature were analyzed by orthogonal design and multivariate nonlinear regression, in order to get significant of Cu-Ce/TiO2 moisture performance and photocatalytic performance. The preparation parameters of optimal Cu-Ce/TiO2 were obtained, performance and characterization of optimal Cu-Ce/TiO2 were studied and analyzed by SEM, LPSA, XRD and UV-Vis. The results showed that various factors on importance order of Cu-Ce/TiO2 moisture performance and photocatalytic performance:Cu-Ce doped loading > Cu-Ce molar ratio > sintering temperature > blank. Preparation parameters of optimal Cu-Ce/TiO2:Cu-Ce doped loading is 3.26%, Cu-Ce molar ratio is 0.87:1, sintering temperature is 505℃. Cu-Ce/TiO2 moisture performance and photocatalytic performance are 0.0869 g · g-1 and 50.7%, respectively. Cu-Ce/TiO2 morphology is better, particle size distribution is 1 183.68-3 916.05 nm, and absorption sideband occurs red shift.

     

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