Light and Magnetism Orchestrating Aquatic Pollutant‐Degradation Robots in Programmable Trajectories

Author:

Zhang Hongbo1,Meng Lingzhuang1,Zhang Yan1,Xin Qiangwei1,Zhou Yuhang1,Ma Zhengxin1,Zuo Liangrui1,Zheng Chuyi1,Luo Jun1,Zhou Yahong2ORCID,Ding Chunmei1,Li Jianshu134

Affiliation:

1. College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China

2. CAS Key Laboratory of Bio‐inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry Beijing 100190 China

3. State Key Laboratory of Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 China

4. Med‐X Center for Materials Sichuan University Chengdu 610041 China

Abstract

AbstractInterfacial floating robots have promising applications in carriers, environmental monitoring, water treatment, and so on. Even though, engineering smart robots with both precisely efficient navigation and elimination of water pollutants in long term remains a challenge, as the superhydrophobicity greatly lowers resistance for aquatic motion while sacrificing chemical reactivity of the surface. Here, a pollutant‐removing superhydrophobic robot integrated with well‐assembled iron oxide‐bismuth sulfide heterojunction composite minerals, which provide both light and magnetic propulsion, and the ability of catalytic degradation, is reported. The motion velocity of the robot reaches up to 51.9 mm s−1 within only 300 ms of acceleration under the orchestration of light, and brakes rapidly (≈200–300 ms) once turn off the light. And magnetism extends the robot to work in broad range of surface tensions in any programmable trajectory. Besides, purification of polluted water is efficiently achieved in situ and the degradation efficiency exhibits eightfold enhancements under the effect of light‐triggered photothermal behavior coupled with magnetic induction, overcoming the dilemma of efficient motion with catalytic superhydrophobicity. This strategy developed here provides guidelines for the explorations of high‐performance smart devices.

Funder

National Natural Science Foundation of China

State Key Laboratory of Polymer Materials Engineering

Youth Innovation Promotion Association of the Chinese Academy of Sciences

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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