Zhou Yingyu, Shen Fei, Zhang Shengdi, Zhao Qingqing, Xu Zhuang, Chen Hongling
College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, People's Republic of China.
ACS Appl Mater Interfaces. 2020 Jul 1;12(26):29876-29882. doi: 10.1021/acsami.0c01064. Epub 2020 Jun 16.
Recently, Pickering emulsion stabilized by Janus particles has received considerable attention for interfacial reactions and droplet manipulation. However, its potential interests have been rarely explored because of the difficulties in designing and fabricating Janus particles for Pickering emulsion with suitable applications. Also, photocatalytic materials are scarcely applied as emulsifiers in Pickering emulsions because of their photogenerated hydrophilicity. This work reports the synthesis of methyl-capped Janus TiO-SiO particles (MJTSs), which can be used as a novel emulsifier and photocatalyst simultaneously. The MJTSs, composed of an anatase TiO sphere and silica rod, are prepared by inverse emulsion-based step-by-step growth. We demonstrate that the Pickering emulsion stabilized by MJTSs represents extraordinary ability of emulsification, excellent stability, and tunable emulsion type (water in oil or oil in water). In addition, the MJTSs exhibit photocatalytic activity in decomposition of pollutants in the water phase while maintaining the stability of the Pickering emulsion.
最近，由Janus粒子稳定的Pickering乳液在界面反应和液滴操纵方面受到了广泛关注。然而，由于难以设计和制备具有合适应用的用于Pickering乳液的Janus粒子，其潜在的应用价值很少被探索。此外，由于光催化材料的光生亲水性，它们很少被用作Pickering乳液中的乳化剂。这项工作报道了甲基封端的Janus TiO-SiO粒子（MJTSs）的合成，其可同时用作新型乳化剂和光催化剂。由锐钛矿TiO球和二氧化硅棒组成的MJTSs通过基于反相乳液的逐步生长制备。我们证明，由MJTSs稳定的Pickering乳液具有非凡的乳化能力、出色的稳定性和可调的乳液类型（水包油或油包水）。此外，MJTSs在分解水相中的污染物时表现出光催化活性，同时保持Pickering乳液的稳定性。
