...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Chemical Engineering of Japan >Surface Modification of Silica Coated ZnO Nanoparticles with 3-Aminopropyltriethoxysilane by Microwave-Assisted Method and Its Effect on the Properties of Coated Samples
【24h】

Surface Modification of Silica Coated ZnO Nanoparticles with 3-Aminopropyltriethoxysilane by Microwave-Assisted Method and Its Effect on the Properties of Coated Samples

机译：3-氨基丙基三乙氧基硅烷对微波包覆的二氧化硅包覆的ZnO纳米粒子的表面改性及其对包覆样品性能的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

References(33) The present study investigates silica coated ZnO prepared by microwave-assisted sol-gel method from tetraethoxysilane (TEOS) and commercial ZnO nanoparticles, and further treated with 3-aminopropyltriethoxysilane (APTES) to change the surface characteristics. For the silica coating of ZnO nanoparticles in a batch type microwave apparatus, two kinds of TEOS/ZnO starting ratios (=0.3, 0.5) were used. The transmission electron microscope (TEM) images of coated samples with different TEOS/ZnO starting ratios suggested that uniform silica coating on the ZnO surface was observed for the coated sample with a TEOS/ZnO ratio of 0.5; whereas, the ZnO surface was partly exposed on the sample with a TEOS/ZnO ratio of 0.3. When these silica coated ZnO nanoparticles were used as starting materials for APTES treatment, it was revealed that 5 wt% (=APTES/silica coated ZnO) of APTES loading was enough to change the dispersion property of the sample with a TEOS/ZnO ratio of 0.5 in the organic solvent/water system. On the contrary, a higher APTES loading amount (10 wt%) was needed for the sample with a TEOS/ZnO ratio of 0.3 to observe the same phenomenon. The results of TEM observation, Fourier Transform Infrared (FT-IR) analysis, and Zeta potentials for the coated samples supported the results of dispersion tests in the organic solvent/water system. Photo-catalytic activities of the samples with a TEOS/ZnO ratio of 0.5 kept at low level (less than 5% compared to bare ZnO) with increasing APTES loading amounts. In contrast, those of the samples with a TEOS/ZnO ratio of 0.3 were reduced with increasing APTES loading amounts.
机译：参考文献（33）本研究研究了用微波辅助溶胶凝胶法由四乙氧基硅烷（TEOS）和市售ZnO纳米颗粒制备的二氧化硅包覆的ZnO，并进一步用3-氨丙基三乙氧基硅烷（APTES）处理以改变表面特性。对于间歇式微波装置中的ZnO纳米颗粒的二氧化硅涂层，使用两种TEOS / ZnO起始比率（＝ 0.3、0.5）。具有不同TEOS / ZnO起始比率的涂层样品的透射电子显微镜（TEM）图像表明，对于TEOS / ZnO比率为0.5的涂层样品，在ZnO表面观察到均匀的二氧化硅涂层。 ZnO表面以0.3的TEOS / ZnO比率部分暴露在样品上。当将这些二氧化硅包覆的ZnO纳米颗粒用作APTES处理的起始原料时，发现5TES％的APTES负载量（= APTES /二氧化硅包覆的ZnO）足以改变TEOS / ZnO比为的样品的分散性能。在有机溶剂/水系统中为0.5。相反，TEOS / ZnO比为0.3的样品需要更高的APTES加载量（10 wt％）才能观察到相同的现象。 TEM观察结果，傅立叶变换红外（FT-IR）分析和涂层样品的Zeta电位支持了有机溶剂/水系统中分散测试的结果。随着APTES负载量的增加，TEOS / ZnO比为0.5的样品的光催化活性保持在较低水平（与裸露ZnO相比小于5％）。相反，随着APTES装载量的增加，TEOS / ZnO比为0.3的样品减少。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号