Abstract Green synthesized nanoparticles are utilized as a photocatalyst for the degradation of an organic dye such as methylene blue. In this study, Hibiscus subdariffa leaf extract act as a capping agent. 2-D fern ZnO/TiO2 hierarchical Nanoleaf was prepared by a self-assembled route. The XRD studies have revealed the hexagonal wurtzite structure of ZnO and a single phase of anatase crystalline form of TiO2. The 2-D fern hierarchical patterns showed needle-like morphologies having a large surface area to volume ratio with a wide absorption band. Compared with the cauliflower structure of ZnO nanoparticles, it’s charge carrier recombination and transfer resistance are low. A high-performance of photocatalytic degradation and photomineralization were observed on the 2-D fern ZnO/TiO2 nanoleaf, under UV-visible irradiation compared to HS-ZnO.

中文翻译：

---

芙蓉叶提取物介导的二维类蕨类 ZnO/TiO2 分级纳米叶用于光催化降解

摘要 绿色合成纳米粒子被用作光催化剂，用于降解有机染料，如亚甲蓝。在这项研究中，木槿叶提取物作为封盖剂。通过自组装路线制备了二维蕨类ZnO/TiO2分级纳米叶。XRD 研究揭示了 ZnO 的六方纤锌矿结构和 TiO2 的单相锐钛矿晶型。二维蕨类分层图案显示出针状形态，具有较大的表面积与体积比和较宽的吸收带。与ZnO纳米粒子的菜花结构相比，它的载流子复合和转移电阻较低。与HS-ZnO相比，在UV-可见光照射下，在二维蕨类ZnO/TiO2纳米叶上观察到了高性能的光催化降解和光矿化。