摘要
以水玻璃为硅源,四氯化钛为钛源,去离子水为溶剂,EDTA为络合剂,十六烷基三甲基溴化铵(CTAB)为模板剂,常压合成Ti-MCM-41,采用X射线粉末衍射(XRD)、低温N2吸附-脱附试验(77K)、傅立叶红外光谱(FTIR)、紫外可见光漫吸收光谱(UV-vis)和透射电子显微镜(TEM)等方法表征了合成的介孔分子筛,研究了晶化时间、晶化温度、pH值、Ti含量、煅烧制度对介孔结构的影响。结果表明:pH值和煅烧对产物的影响最为明显;EDTA抑制非骨架钛具有良好的效果;绝大多数的Ti以四配位状态存在于SiO2网络骨架中。
The Ti-MCM-41 mesoporous molecular sieve was synthesized under normal pressure condition, by employing water glass as the silicon source, TICl4 solution as the titanium source, deionized water as solvent, EDTA as the chelating agent and CTAB as the template. The Ti-MCM-41 molecular sieve was characterized by the XRD, N2 adsorption-desorption （77 K）, FHR, UV-vis and TEM, effects of the crystallization time, temperature, pH value, titanium content and calcination on pore structure were investigated on the sieve. The experimental results showed that the pH value and calcination significantly influence the sieve ; EDTA plays an important role to inhibit formation of the extra framework titania; the most of Ti^4＋ ions are tetra-coordinate in the framework of Ti-MCM-41.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2008年第3期615-621,625,共8页
Bulletin of the Chinese Ceramic Society
作者简介
付英（1988-），女，硕士研究生．主要从事高性能无机非金属材料的研究．E-mail：yingfu@mail．scut．edu．cn
