Light-controlled bubble propulsion of amorphous TiO2/Au Janus micromotors

被引：86

作者：

Li, Yan ^{[1
]}

Mou, Fangzhi ^{[1
]}

Chen, Chuanrui ^{[1
]}

You, Ming ^{[1
]}

Yin, Yixia ^{[1
]}

Xu, Leilei ^{[1
]}

Guan, Jianguo ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, 122 Luoshi Rd, Wuhan 430070, Peoples R China

来源：

RSC ADVANCES | 2016年 / 6卷 / 13期

基金：

中国国家自然科学基金;

关键词：

PHOTOCATALYTIC ACTIVITY; CATALYTIC NANOMOTORS; DRIVEN; MOTION; FABRICATION; MICROENGINES; EFFICIENCY; DELIVERY;

D O I：

10.1039/c5ra26798f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, a bubble-propelled photoactivated amorphous TiO2/Au (Am-TiO2/Au) Janus micromotor has been demonstrated by utilizing the efficient photocatalytic H2O2 decomposition over the in situ H2O2 sensitized Am-TiO2 under UV irradiation. The power conversion of the micromotor experiences a process from UV light power, to chemical power and finally to mechanical power. The quantum efficiency of O-2 bubble evolution from photocatalytic decomposition of H2O2 reaches 28%, and the power conversion efficiency reaches 1.28 x 10(-9), which enables the micromotor to generate a strong bubble thrust propelling itself forward with a maximum speed of 135 mm s(-1). The motion state and speed of the Am-TiO2/Au micromotors can be reversibly, wirelessly and remotely controlled at will with an ultrafast response rate (less than 0.1 s) by regulating "on/off" switch and intensity of UV irradiation. Consequently, the as-developed Am-TiO2/Au micromotors may promise potential challenging applications in such as "on-the-fly" adsorption and decomposition of pollutants in water.

引用

页码：10697 / 10703

页数：7

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