Metal oxides nanoparticles play significant roles in catalysis, heavy metal ions adsorption and pigments industries, but their intrinsic hydrophilicity greatly restricts their applications in harsh environments where even tiny amounts of water would deteriorate materials. Herein, we reported a facile one-step method to prepare superhydrophobic urchin-like β-FeOOH nanoparticles without any post-treatments. Interestingly, both the urchin-like micro-nano structure and modification of low surface energy materials assembled synchronously during the reaction due to the dual function of sodium dodecyl sulfonate (SDS) on the morphology and surface composition of synthesized nanoparticles. Accordingly, a plausible growth mechanism of superhydrophobic urchin-like nanoparticles was validly proposed based on the structure-directing effect and subsequent graft of SDS supported by convictive experiment data. These synthesized powders were substrate-independent, therefore could be flexibly applied on various substrates via commercially available products. The superhydrophobicity of synthesized powders processed excellent durability, such as underwater stability, anti-UV irradiation, damp heat resistance, anti-scratch and thermal stability. This water-based preparation method which is eco-friendly and safe to mass production would provide a new simple and fast route to synthesize superhydrophobic nanoparticles with hierarchical structures.

金属氧化物纳米粒子在催化，重金属离子吸附和颜料行业中起着重要作用，但是它们固有的亲水性极大地限制了它们在恶劣环境中的应用，在恶劣环境中，即使少量的水也会使材料变质。在本文中，我们报道了一种无需任何后处理即可轻松制备超疏水性顽童状β-FeOOH纳米粒子的简便方法。有趣的是，由于十二烷基磺酸钠（SDS）对合成纳米颗粒的形态和表面组成具有双重作用，因此在反应过程中，海胆状的微纳米结构和低表面能材料的改性同时组装。因此，基于结构定向效应和随后的SDS接枝实验，有效地提出了超疏水性海胆状纳米颗粒的合理生长机理。这些合成的粉末与基材无关，因此可以灵活地应用于各种基材上通过市售产品。合成粉末具有超疏水性，具有出色的耐久性，例如水下稳定性，抗紫外线辐射，耐湿热性，抗划伤性和热稳定性。这种生态友好且可大量生产的水基制备方法将为合成具有分层结构的超疏水纳米粒子提供一条新的简便途径。