摘要
本研究采用溶胶-凝胶法在天然铁电气石微粒表面原位组装纳米TiO2,实现天然电气石微粒对纳米TiO2固定和功能增强的双重目的。XRD结果表明,TiO2/电气石复合材料的主要物相组分是锐钛矿型TiO2,其原生颗粒尺寸为45.79nm。SEM显微形貌观察发现,纳米TiO2均匀地固定在天然铁电气石微粒表面。光催化实验表明,天然铁电气石可有效提高纳米TiO2的光催化活性,在一定条件下,甲基橙染料溶液的脱色率可达到100%。电气石含量为2%的复合材料光催化活性最高;甲基橙溶液初始浓度越小,光催化活性越高;复合光催化剂的最佳用量是3.0g·L-1。
In this study,in situ assembly of nano TiO2 onto the surface of natural schorl particles was realized by Sol-Gel method,with dual purposes of immobilization and functional enhancement for nana TiO2.XRD results indicated that anatase TiO2 was the main phase of TiO2 /schorl composite and the primary particle size of nano TiO2 was 45.79nm.SEM observation revealed that nano TiO2 was uniformly dispersed on the surface of schorl.Photocatalytic experiment showed that the natural schorl could effectively improve the photocatalytic activity of nano TiO2 and the discoloration ratio of methyl orange solution could reach 100% under certain conditions.When the schorl content was 2%,the TiO2 /schorl composite exhibited the highest photocatalytic activity.The smaller the initial concentration of methyl orange solution was,the higher photocatalytic activity was.The best dosage of compos-ite photocatalyst was 3.0g·L-1.
出处
《化学工程师》
CAS
2013年第11期1-4,16,共5页
Chemical Engineer
基金
国家大学生创新创业训练计划项目(201210214006)
黑龙江省教育厅科研项目(12521071)
