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首页> 外文期刊>RSC Advances >Fabrication and photoactivity of short rod-shaped mesoporous SiO2@TiO2 composites with TiO2 shell
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Fabrication and photoactivity of short rod-shaped mesoporous SiO2@TiO2 composites with TiO2 shell

机译：用TiO2壳体的短杆形介孔SiO2的制造和光度释放和光度

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This paper presents an improved strategy for synthesizing short rod-shaped mesoporous SiO _(2) @TiO _(2) composites containing a TiO _(2) shell by using short rod-shaped mesoporous SiO _(2) –polyglycidyl methacrylate (PGMA)–polyoligo(ethylene glycol)methyl ether methacrylate (PEGMA) as a template and tetrabutyl titanate (TBT) as a titanium source. SiO _(2) –PGMA- b -PEGMA rods were initially fabricated through grafting GMA and EGMA onto the surface of the halogen functional group of mesoporous SiO _(2) using activators regenerated by electron transfer-atom transfer radical polymerization. TBT was hydrolyzed with the PEGMA chain through hydrogen bonding. The rod-shaped mesoporous SiO _(2) @TiO _(2) structure was finally acquired through calcination. Characterization results indicated that the amphiphilic block copolymer was grafted onto the mesoporous SiO _(2) surface. Moreover, the TiO _(2) samples existed only in the anatase phase, and the prepared SiO _(2) @TiO _(2) exhibited bimodal nanoporous structures. The synthesized short rod-shaped mesoporous SiO _(2) @TiO _(2) materials demonstrated higher specific surface area and absorption rate than samples prepared from non-mesoporous or unmodified rod-shaped SiO _(2) . These characteristics effectively enhanced the photocatalytic activity of the composite. The photocatalytic activity of the fabricated composite was then tested on rhodamine B photodegradation.
机译：本文介绍了通过使用短杆状介酰甲基丙烯酸甲酯（PGMA）（PGMA）来合成含有TiO _（2）壳的短杆状介孔SiO _（2）@ 1）复合材料的改进策略） - 作为钛源的模板和四丁酯（TBT）作为钛源的聚合物（乙二醇）甲基醚甲基丙烯酸甲酯（PEGMA）。使用电子转移原子转移自由基聚合反射的活化剂，首先通过接枝GMA和EGMA在卤素官能团的卤素官能团的表面上制造SiO _（2）-pegma棒。 TBT通过氢键与PEGMA链水解。通过煅烧最终获得杆状介孔SiO _（2）@tio _（2）结构。表征结果表明，两亲嵌段共聚物接枝到中孔SiO _（2）表面上。此外，仅在锐钛矿相中存在TiO _（2）样品，并且制备的SiO_（2）@tio_（2）表现出双峰纳米多孔结构。合成的短杆状介孔SiO _（2）@tio_（2）材料表现出高于由非介孔或未修饰的棒状SiO_（2）制备的样品的比表面积和吸收率更高。这些特性有效增强了复合材料的光催化活性。然后在罗丹明B光降解上测试制造复合材料的光催化活性。

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