响应面法优化Co^(2+)掺杂TiO_(2)制备工艺研究

Optimization for preparation of Co^(2+)-doped TiO_(2)by response surface methodology

利用共沉淀-水热法制备了钴掺杂二氧化钛光催化剂,以催化降解水中草甘膦效率为指标,采用响应面法对钴掺杂二氧化钛光催化剂的制备条件进行优化。结果表明,钴掺杂二氧化钛光催化剂的最佳制备工艺为:水热反应温度139.64℃、水热反应时间23.75h、煅烧温度408.17℃和煅烧时间4.04h。利用最佳制备条件下制得的钴掺杂二氧化钛光催化剂催化降解水中草甘膦,降解效率接近80%,与纯二氧化钛相比,催化降解效率有较大幅度提升。

Co^(2+)-doped TiO_(2)photocatalyst was prepared by co-precipitation and hydrothermal method.The preparation conditions of Co^(2+)-doped TiO_(2)photocatalyst were optimized by response surface methodology with the degradation efficiency of glyphosate in water as the index.The results show that the optimal preparation process of Co^(2+)-doped TiO_(2)photocatalyst is as follows:hydrothermal reaction temperature 139.64℃,hydrothermal reaction time 23.75 h,calcination temperature 408.17℃and calcination time 4.04 h.The photocatalytic degradation efficiency of glyphosate in water was nearly 80%by using Co^(2+)-doped TiO_(2)photocatalyst prepared under the optimal preparation conditions.Compared with pure titanium dioxide,the degradation efficiency was greatly improved.