Journal
RSC ADVANCES
Volume 6, Issue 13, Pages 10697-10703Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra26798f
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Funding
- National Natural Science Foundation of China [51303144, 21474078, 51521001]
- Top Talents Lead Cultivation Project of Hubei Province [2015CFA003, 2012FFB05101]
- Yellow Crane talents plan of Wuhan municipal government
- Fundamental Research Funds for the Central Universities [WUT: 2015-III-060, 2014-YB-009]
- Natural Science Foundation of Hubei Province [2015CFA003, 2012FFB05101]
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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.
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