For efficient pollutant degradation under any extreme circumstances, TiO2-based photocatalyst being accessible and inexpensive will be a desirable engineering source satisfying excellent photocatalytic performance in an eco-friendly manner. Here, we report the unfolded way of designing the novel concept of Z-scheme heterojunction consisting of TiO2 and FeMoO4 via thermal techniques in which hydrothermal treatment was coupled sequentially by the calcination step. The well-aligned band structure of the developed composite, possessing numerous active sites, enhanced the separation of the generated charge carriers which in turn boosted the photocatalytic efficiency. The prepared photocatalysts were thoroughly investigated via different techniques like XRD, FTIR, XPS, SEM, TEM-EDS, Pl, UV-Vis diffuse reflectance, and Uv-Vis spectroscopy. The TiO2-8 wt% FeMoO4 (TF 8 %) photocatalyst displayed better photocatalytic performance for removing Basic Fuchsin dye (BF) in 20 min than other counterparts under visible light irradiation. Furthermore, the probable photocatalytic mechanism was evidenced by XPS results and the trapping experiments. Trapping experiments revealed that •O2− and •OH radicals were the primary active species. The synthesized TF 8 % photocatalyst has revealed outstanding durability after five successive recycles without change in the structural features which was confirmed by XRD analysis. This work could provide new perspectives into various environmental applications by utilizing highly efficient materials that have been strategically constructed.

中文翻译：

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新型环保型 0D/3D TiO2@FeMoO4 二元复合材料，具有增强的光催化性能：结构分析和 Z 方案解释


为了在任何极端情况下有效地降解污染物，基于TiO2的光催化剂既容易获得又便宜，将成为以环保方式满足优异光催化性能的理想工程来源。在这里，我们报告了通过热技术设计由 TiO2 和 FeMoO4 组成的 Z 型异质结的新概念的展开方法，其中水热处理通过煅烧步骤依次耦合。所开发的复合材料的对齐良好的能带结构具有许多活性位点，增强了产生的载流子的分离，从而提高了光催化效率。通过 XRD、FTIR、XPS、SEM、TEM-EDS、Pl、UV-Vis 漫反射和 Uv-Vis 光谱等不同技术对制备的光催化剂进行了深入研究。在可见光照射下，TiO2-8 wt% FeMoO4 （TF 8 %） 光催化剂在 20 分钟内表现出比其他同类产品更好的光催化去除碱性品红染料 （BF） 的性能。此外，XPS 结果和捕获实验证明了可能的光催化机制。捕获实验表明 •O2− 和 •OH 自由基是主要的活性物质。合成的 TF 8 % 光催化剂在连续 5 次循环后表现出出色的耐久性，结构特征没有变化，XRD 分析证实了这一点。这项工作可以通过利用经过战略构建的高效材料，为各种环境应用提供新的视角。