Wetting Modification by Photocatalysis: A Hands-on Activity To Demonstrate Photoactivated Reactions at Semiconductor Surfaces,Journal of Chemical Education

当前位置： X-MOL 学术 › J. Chem. Educ. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Wetting Modification by Photocatalysis: A Hands-on Activity To Demonstrate Photoactivated Reactions at Semiconductor Surfaces
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2018-09-14 00:00:00 , DOI: 10.1021/acs.jchemed.8b00362
Luca Rimoldi _{1,

2} , Tommaso Taroni _{1,

2} , Daniela Meroni _{1,

2}

Affiliation

We present a hands-on activity designed for advanced physical chemistry courses for Master’s students on the application of photocatalysis to the modification of the surface properties of a semiconductor (titanium dioxide). The wetting properties of TiO₂ films, deposited from commercial powders, are studied before and after UV irradiation. Irradiation-induced superhydrophilicity is exploited to provide antifogging properties. The TiO₂ films are then functionalized with a perfluorinated alkylsilane to impart superhydrophobicity and subsequently lithographed by irradiation through a photomask: the photocatalytic degradation of the organic chains in the irradiated areas leads to a wetting contrast that can be revealed using dye solutions. This experience can be easily adapted to be suited for undergraduates or high-school students as well as to demonstrations for science festivals.

中文翻译：

通过光催化进行的湿润改性：在半导体表面上表现出光活化反应的动手活动

我们提供了一个动手实践活动，专门为硕士生设计的高级物理化学课程，内容涉及将光催化应用于半导体（二氧化钛）表面性质的改性。研究了从商业粉末中沉积的TiO ₂薄膜的湿润性能，在紫外线照射之前和之后。利用辐射诱导的超亲水性来提供防雾性能。TiO ₂然后将膜用全氟化烷基硅烷官能化以赋予超疏水性，随后通过光掩模通过辐射进行平版印刷：被辐照区域中有机链的光催化降解导致形成润湿对比，而使用染料溶液可以显示出该对比。这种体验很容易适应，适合大学生或高中生以及科学节的示范。

更新日期：2018-09-14

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11