期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 658, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.130712
关键词
Micro; nanomotors; Dual-propulsion; Bowl-like polydopamine; MnO 2 nanosheet; Pollutant removal
In this study, a dual-propelled asymmetric bowl-like structured PDA@MnO2 nanomotor was developed, which can be propelled by both near-infrared (NIR) light and hydrogen peroxide (H2O2). The nanomotor shows high removal efficiency for Pb2+ and methylene blue (MB) under NIR light irradiation, indicating its potential for the removal of multiple pollutants in complex water environments.
Self-propelled micro/nanomotors hold significant potential to achieve innovative pollutant removal application. Most current micro/nanomotors are designed for single modal propulsion and a specific type of contaminant, resulting in limited applications in complicated water environments. Herein, we develop a dual-propelled asymmetric bowl-like structured polydopamine (PDA)@MnO2 nanomotor, which possesses the capacity of both near-infrared (NIR) light and hydrogen peroxide (H2O2) propulsion. The PDA@MnO2 nanomotors were synthesized by introducing many thin MnO2 nanosheets onto the surface of bowl-like mesoporous PDA nanoparticles via in-situ oxidative growth method. The obtained PDA@MnO2 nanomotor shows effective diffusion coefficient of 25.0 & mu;m2/s under NIR light irradiation (808 nm, 3 W/cm2). Under the NIR light irradiation, the PDA@MnO2 nanomotor displays the enhanced removal efficiency of Pb2+ and methylene blue (MB), with the adsorption capacity of 176 mg/g for Pb2+ and 81 mg/g for MB. Our developed dual-propelled PDA@MnO2 nanomotor may have a promising potential for removal application of multiple pollutants.
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