Mass transfer is a key parameter in heterogeneous reactions. Micro/nanomachines, a promising technology for environmental applications, significantly enhance the performance of conventional purification treatments because of the active motion ability and thus enhanced diffusion (superdiffusion) of these photocatalysts, which in turn leads to dramatically improved mass transfer and higher degradation capability compared to stationary microparticles. However, the design of micromotors generally involves noble metals, for instance, Au and Pt, to achieve an effective autonomous motion. Considering the expensive fabrication cost and complicated steps, we present Pt-free single-component light-powered WO₃ micromotors capable of enhanced diffusion and effective degradation of nitroaromatic compounds in water. These microswimmers, synthesized by a hydrothermal method, which is highly scalable at low cost, followed by calcination, exhibit fuel-free light-driven motion due to asymmetric light irradiation. Picric acid (PA) and 4-nitrophenol (4-NP) were selected as representative nitroaromatic contaminants and photocatalytically decomposed by WO₃ micromotors thanks to the close contact with the micromotors promoted by their self-propulsion. This work provides a low-cost, sustainable, scalable method for enhancing mass transfer by creating moving catalysts with broad application potential for water cleanup.

传质是多相反应中的一个关键参数。微/纳米机器是一种很有前途的环境应用技术，由于这些光催化剂的主动运动能力从而增强了扩散（超扩散），从而显着提高了传统净化处理的性能，这反过来又导致显着改善的传质和更高的降解能力。到静止的微粒。然而，微电机的设计通常涉及贵金属，例如 Au 和 Pt，以实现有效的自主运动。考虑到昂贵的制造成本和复杂的步骤，我们提出了无 Pt 单组分光动力 WO ₃微电机能够增强水中硝基芳烃化合物的扩散和有效降解。这些微型游泳器通过水热法合成，具有高度可扩展性和低成本，随后经过煅烧，由于不对称光照射，表现出无燃料光驱动运动。_{苦味酸(PA) 和4-硝基苯酚(4-NP) 被选为代表性的硝基芳烃污染物，由于其自​​推进力促进了与微电机的紧密接触，WO 3}微电机对其进行了光催化分解。这项工作提供了一种低成本、可持续、可扩展的方法，通过创建具有广泛水净化应用潜力的移动催化剂来增强传质。