ZHANG Minghui^a,WEI Jingwu^a, XU Leilei^a, GUAN Jianguo^a,b

(a. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,b. International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China)

Abstract：Platinum-based micro-nanomotors have been widely used as a typical system for conducting research on chemically-driven micro-nanomotors due to their simple preparation and stable composition. For chemically-driven micro-nanomotors, their motion is easily constrained by the chemical reaction providing the driving force, and it is difficult to achieve an increase in motion speed without changing the fuel concentration. In this study, platinum-based Janus micro-nanomotors were used as the research object to explore strategies for enhancing the motion of chemically-driven micro-nanomotors. By introducing a transition metal oxide layer to create a heterojunction, Pt was partially encapsulated on the surface of PS@transition metal oxide (CuO or WO₃) core-shell particles to construct PS@transition metal oxide-Pt Janus micro-nanomotors. The results show that the catalytic conversion rate of H₂O₂ is improved by constructing the heterojunction, and the motion speed of the platinum-based Janus micro-nanomotor is increased from 22 μm/s to 35 μm/s, achieving motion enhancement. The increase in motion speed depends on the electron transfer rate between Pt and transition metal oxide.

Keywords：micro-nanomotor; chemical-driven; heterojunction; motion enhancement

Get Citation：ZHANG M H, WEI J W, XU L L, et al. Motion enhancement for platinum-based Janus micro-nanomotors[J]. China Powder Science and Technology, 2023, 29(5): 135-144.

DOI：10.13732/j.issn.1008-5548.2023.05.015

Received：2023-04-23,Revised：2023-06-29,Online：2023-08-25 12：05。

Funding Project：国家自然科学基金项目,编号: 21975195。

First Author：张铭辉(1997—),男,硕士研究生,研究方向为微纳米马达。E-mail: zhangmh@whut.edu.cn。

Corresponding Author：许蕾蕾(1981—),女,研究员,博士,博士生导师,研究方向为微纳米马达。E-mail: xull@whut.edu.cn。