Ordered meso-/macroporous silica and titania films by breath figure templating in combination with non-hydrolytic sol–gel processing
Ordered meso-/macroporous silica and titania films by breath figure templating in combination with non-hydrolytic sol–gel processing
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DOI：
10.1016/j.micromeso.2015.06.043
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发表时间：
2015-11
影响因子：
5.2
通讯作者：
A. Feinle;Johanna Akbarzadeh;H. Peterlik;N. Hüsing
中科院分区：
文献类型：
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作者：
A. Feinle;Johanna Akbarzadeh;H. Peterlik;N. Hüsing
提出了一种简便、经济的介孔/大孔二氧化硅和二氧化钛材料的制备方法，该方法结合了呼吸图（BF）模板法、非水解溶胶-凝胶法和蒸发诱导自组装法。涂料以及粉末可以通过在聚合的乙酸丁酸纤维素（CAB）溶液和少量水的存在下简单地将含有相应的金属醇盐/氯化物混合物的溶胶浇铸到皮氏培养皿中来合成。对于硅质产物，已经获得了长程有序的中孔网络，而对于二氧化钛，合成了包含仅具有低长程有序度的颗粒间中孔的结晶产物。CAB的添加到溶胶诱导大孔的形成。结果表明，超声均质后溶胶的老化时间以及聚合物含量对大孔形态的形成起着重要作用。
A facile and cost efficient approach towards meso-/macroporous silica and titania materials is presented by a combination of breath figure (BF) templating with non-hydrolytic sol–gel processing and evaporation-induced self-assembly. Coatings as well as powders can be synthesized by simply casting sols containing the respective metal alkoxide/chloride mixture in the presence of a polymeric cellulose acetate butyrate (CAB) solution and small amounts of water into Petri dishes. For the siliceous products a long range ordered mesopore network has been obtained, while for titania crystalline products comprising interparticle mesoporosity with only a low degree of long range ordering were synthesized. The addition of CAB to the sol induced the formation of macropores. It was found that the ageing time of the sol after homogenization by ultrasonication as well as the polymer content play an important role in the formation of the macroporous morphology.