Abstract In the present research, ZnO/TiO2 heterojunction nanomeshes (HNMs) were synthesized by anodizing and calcination. The structural study revealed the as-synthesized samples were composed of anatase TiO2, rutile TiO2,and zincblende-structured ZnO. TiO2 segments had a preferred orientation along the [110] direction, whereas ZnO nanoparticles were oriented along the [200] direction. In comparison to pure TiO2 nanomeshes, ZnO/TiO2 HNMs had higher methylene blue (MB) photodegradation capacity. Furthermore, the effects of different parameters, such as calcination temperature, initial pH, and mesh density, on MB photodegradation were investigated. The superior photocatalytic activity was achieved by the sample calcinated at 600°C due to the appearance of zinc-blende ZnO and the mixed crystal phases of anatase and rutile TiO2. A high degradation efficiency was obtained under alkaline conditions. When the mesh density was 200 per inch, the maximum photodegradation efficiency was achieved.

中文翻译：

---

使用 ZnO/TiO2 异质结纳米网电极光催化降解亚甲基蓝

摘要 在目前的研究中，ZnO/TiO2 异质结纳米网（HNMs）是通过阳极氧化和煅烧合成的。结构研究表明，合成的样品由锐钛矿型 TiO2、金红石型 TiO2 和闪锌矿结构的 ZnO 组成。TiO2 链段沿 [110] 方向具有优先取向，而 ZnO 纳米颗粒沿 [200] 方向取向。与纯 TiO2 纳米网相比，ZnO/TiO2 HNM 具有更高的亚甲蓝 (MB) 光降解能力。此外，研究了不同参数（如煅烧温度、初始 pH 值和网孔密度）对 MB 光降解的影响。由于闪锌矿 ZnO 和锐钛矿和金红石 TiO2 的混合晶相的出现，样品在 600°C 下煅烧实现了优异的光催化活性。在碱性条件下获得了高降解效率。当网格密度为每英寸 200 个时，达到最大的光降解效率。