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张健华、牟方志等撰写的论文被ACS Appl. Mater. Interf.正式接收发表

发布时间:2019-04-18
    恭喜张健华、牟方志等撰写的论文“Simple-Structured Micromotors Based on Inherent Asymmetry in Crystalline Phases: Design, Large-Scale Preparation and Environmental Application”被美国化学会期刊ACS Appl. Mater. Interfaces(影响因子8.097)正式接收发表(2019, 10.1021/acsami.9b03579)!在该论文中,我们针对目前微纳米马达局限的设计方法、复杂的制备过程、昂贵的材料组成或者需要借助复杂外场等问题,提出了一种新的设计策略制备出了结构简单、便宜易得、可大批量制备的锐钛矿/金红石二氧化钛微米马达。通过控制煅烧温度,可以轻易地控制TiO2粒子的相转变过程以及晶粒大小。由于两种晶相不同的能带结构,在紫外光照下其表面发生不同的光催化氧化还原反应,再加上其高效的光催化降解有机污染物的能力,赋予了这种锐钛矿/金红石二氧化钛微米马达高效运动能力的同时,也使其在有机污染物的环境治理方面有很好的应用前景。 

    

      原文详细摘要如下:The key principle of designing a micro/nanomotor is to introduce asymmetry to a micro/nanoparticle. However, micro/nanomotors designed based on external asymmetry and inherent chemical and geometrical asymmetry usually suffer from tedious small-scale preparation, high cost and/or complexity of external power and control devices, making them facing insurmountable hurdles in practical applications. Herein, considering the possible distinct properties of different polymorphs, we propose a novel design strategy of simple-structured micromotors by introducing inherent asymmetry in crystalline phases. The inherent phase asymmetry can be easily introduced in spherical TiO2 particles by adjusting calcination temperature to control the phase transition and growth of primary grains. The as-designed anatase/rutile TiO2 micromotors not only show efficient autonomous motions controlled by light in liquid media stemming from the asymmetric surface photocatalytic redox reactions, but also have a promising application in environmental remediation due to their high photocatalytic activity in “on-the-fly” degradation of organic pollutants, facile large-scale fabrication and low cost. The proposed design strategy may pave the way for the large-scale productions and applications of micro/nanomotors.


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