孔磊等撰写的论文“Fuel-Free Light-Powered TiO2/Pt Janus Micromotors for Enhanced Nitroaromatic Explosives Degradation”被美国化学会期刊ACS Appl Mater Interfaces正式接收发表（2018，doi:10.1021/acsami.8b05776）。在该论文中，新加坡南洋理工大学Martin Pumera教授和我们发现在紫外光照射下，光驱TiO2/Pt双面神微米马达能高效地光催化降解水中的2，4-DNT和2，4，6-TNT。在TiO2/Pt双面神微米马达表面上由光生空穴和电子诱导的氧化还原反应能产生一个局部电场推动微米马达运动并光降解2，4-DNT和2，4，6-TNT的氧化物质。此外，由于通过这些微马达的运动增强了溶液中的混合和传质，所以与固定的TiO2/PtJanus微马达相比，移动的TiO2/PtJanus微马达显示出能更有效降解硝基芳族化合物。这种用于炸药降解的无燃料光驱微米马达有望为环境救治和安全应用提供一种应用一种新方法。
原文详细摘要如下：Nitroaromatic explosives such as 2,4,6-trinitrotoluene (2,4,6-TNT) and 2,4-dinitrotoluene (2,4-DNT) are two common nitroaromatic compounds in ammunition. Their leakage leads to serious environmental pollution and threatens human health. It is important to remove or decompose them rapidly and efficiently. In this work, we present that light-powered TiO2/Pt Janus micromotors have high efficiency for the “on-the-fly” photocatalytic degradation of 2,4-DNT and 2,4,6-TNT in pure water under UV irradiation. The redox reactions, induced by photogenerated holes and electrons on the TiO2/Pt Janus micromotor surfaces, produce a local electric field that propels the micromotors as well as oxidative species that are able to photodegrade 2,4-DNT and 2,4,6-TNT. Furthermore, the moving TiO2/Pt Janus micromotors show an efficient degradation of nitroaromatic compounds as compared to the stationary ones thanks to the enhanced mixing and mass transfer in the solution by movement of these micromotors. Such fuel- free light-powered micromotors for explosive degradation are expected to find a way to environmental remediation and security applications.
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