Fluoroalkyl end-capped vinyltrimethoxysilane oligomer/anatase titanium oxide nanocomposites possessing photocatalytic activity even after calcination at 1000°C.
Fluoroalkyl end-capped vinyltrimethoxysilane oligomer/anatase titanium oxide nanocomposites possessing photocatalytic activity even after calcination at 1000°C.
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氟烷基封端的乙烯基三甲氧基硅烷低聚物/锐钛矿型氧化钛纳米复合材料即使在1000℃下煅烧后也具有光催化活性。
DOI：
10.1016/j.jcis.2012.08.005
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发表时间：
2012
影响因子：
9.9
通讯作者：
H. Sawada
中科院分区：
文献类型：
--
作者：
Sujuan Guo;H. Yoshioka;Hiroshi Kakehi;Y. Kato;M. Miura;N. Isu;B. Améduri;H. Sawada
以四氢呋喃为溶剂，氟烷基封端的乙烯基三甲氧基硅烷齐聚物[RF-（VM）n-RF]在碱性条件下与纳米二氧化钛（an-TiO 2）发生溶胶-凝胶反应，得到相应的氟烷基封端的乙烯基三甲氧基硅烷齐聚物/纳米二氧化钛复合材料[RF-（VM-SiO 2）n-RF/an-TiO 2]。结果表明，在1000°C煅烧后，纳米复合材料中的an-TiO 2晶体结构完全保持其结构，没有向金红石型转变，而原始an-TiO 2纳米颗粒的晶体结构在类似条件下完全向金红石型转变。有趣的是，RF-（VM-SiO2）n-RF/an-TiO 2纳米复合材料在1000°C煅烧前后，在紫外光照射下对亚甲基蓝的脱色表现出相似的光催化活性。
Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(VM)n-RF] underwent the sol–gel reaction under alkaline conditions in the presence of anatase titanium oxide nanoparticles (an-TiO2) in tetrahydrofuran to give the corresponding fluorinated oligomer/anatase titanium oxide nanocomposites [RF-(VM-SiO2)n-RF/an-TiO2]. Crystalline structure of an-TiO2in the nanocomposites thus obtained was found to keep completely its structure without phase transformation to rutile even after calcination at 1000°C, although crystalline structure of the original an-TiO2nanoparticles underwent a complete phase transformation to the rutile under similar conditions. Interestingly, RF-(VM-SiO2)n-RF/an-TiO2nanocomposites before and after calcination at 1000°C exhibited the similar photocatalytic activity for the decolorization of methylene blue under UV light irradiation.