Large-scale Preparation Of Catalytical Driven Micromotors And Performance Research

Micromotors are microscopic devices made by a specific process that use other forms of energy to achieve autonomous movement in a variety of fluid media and perform complex tasks.In recent years,the rapid development of micromotors has attracted extensive attention from scholars at home and abroad.At present,micro-motors are mostly driven by micron-level bubble propulsion mechanisms,and the catalysts that generate bubbles include Pt,Ag,and catalase.However,the precious metal particles are expensive,and the enzyme catalyst?catalase?is easily deactivated,which greatly limits the practical application of micromotors.Therefore,it is still one of the major challenges that how to use simple and low-cost methods to prepare catalytic micromotor in batches.To this end,this paper mainly carries out the following work:1.Prepare a bubble-driven micromotor?KF@Mn O₂?with tubular structure based on Kapok Fiber?KF?as bio-template.The method has simple preparation process,can realize large-scale production and has low cost.Due to the structural characteristics of KF,the amount?or thickness?of Mn O₂loaded on the inner and outer tube walls can be controlled by changing the dipping time.The obtained KF@Mn O₂micromotor can realize high-efficiency movement,and the maximum speed reaches 6 body length/second?615?m/s?.The controlled movement of the micromotor can be realized by loading magnetite nanoparticles?Fe₃O₄NPs?.2.Prepare a bubble-driven micromotor?PP@Mn O₂?with triple cavity structure based on Pine Pollen?PP?as bio-template.Utilizing C=C in oleic acid to reduce KMn O₄to realize the loading of Mn O₂on the surface of pine pollen,the preparation process is simple and easy to operate.The amount?or thickness?of Mn O₂can be controlled by changing the concentration of KMn O₄.The micromotor can realize self-driven,and the movement depends on the amount?or thickness?of Mn O₂and the structure of pine pollen.PP@Mn O₂micromotor can effectively adsorb organic dyes in wastewater,the degradation rate of methyl blue?MB?reaches 97.5%within 30minutes,and the adsorption process conforms to the pseudo-second-order kinetic equation,indicating that chemical adsorption is the main method.3.Prepare a bubble-driven micromotor?Yeast@Mn O₂?with spherical structure based on Yeast as bio-template.The amount?or thickness?of loaded Mn O₂can be controlled by changing the concentration of KMn O₄.Yeast@Mn O₂micromotor can realize self-driven,the movement speed is related to the amount of load Mn O₂.The Yeast@Mn O₂micromotor can efficiently adsorb hexavalent chromium[Cr???]in wastewater,and the removal rate reaches 97.3%within 20 min.The adsorption process conforms to the pseudo-second-order kinetic equation.In summary,this paper proposes a simple,easy-to-operate and low-cost method for the large-scale production of catalytical driven micromotors.The resulting micromotors have a highly efficient degradation rate for organic dyes and heavy metal ions,laying a theoretical foundation for expanding their application in environmental wastewater treatment.