The application of photocatalytic technology in algae killing is limited by the non-floatability and difficulty in recycling of the photocatalysts. Loading photocatalyst on magnetic or floatable carriers is the most popular method for overcoming the above inadequacies. In this work, a CdZnS/TiO2 membrane photocatalyst with adjustable suspended depth (include floating) and flexible assembly is designed, which is less prone to dislodgement due to in situ synthesis and has a wider range of applicability than previously reported photocatalysts. The photocatalytic removal of Microcystis aeruginosa revealed that the suspended depth and distribution format of the CdZnS/TiO2 membrane photocatalysts have striking effects on the photocatalytic removal performance of Microcystis aeruginosa, the photocatalytic removal efficiency of CdZnS/TiO2-2 membrane photocatalysts for Microcystis aeruginosa could reach to 98.6 % in 60 min when the photocatalysts assembled in the form of 3 × 3 arrays suspended at a depth of 2 cm from the liquid surface. A tiny amount of TiO2 loading allows the formation of Z-Scheme heterojunction, resulting in accelerating the separation efficiency of photogenerated carriers, preserving the photogenerated electrons and holes with stronger reduction and oxidation ability and inhabiting the photo-corrosion of CdZnS.

中文翻译：

---

Z-Scheme 膜 CdZnS/TiO2 异质结光催化剂在模拟阳光下高效光催化去除铜绿微囊藻：可调节的悬浮深度和灵活的组装


光催化技术在灭藻中的应用受到光催化剂的不可漂浮性和难以回收的限制。将光催化剂负载在磁性或可漂浮载体上是克服上述不足的最流行的方法。本工作设计了一种悬浮深度可调（包括浮动）和柔性组装的 CdZnS/TiO2 膜光催化剂，该光催化剂不易因原位合成而发生偏移，并且比以前报道的光催化剂具有更广泛的适用性。光催化去除铜绿微囊藻揭示了CdZnS/TiO2膜光催化剂的悬浮深度和分布形式对铜绿微囊藻的光催化去除性能有显著影响，当光催化剂以3 × 3阵列的形式组装在距离液面2 cm的深度时，CdZnS/TiO2-2膜光催化剂对铜绿微囊藻的光催化去除效率可在60 min内达到98.6 %。微量的 TiO2 负载允许形成 Z 型异质结，从而加速光生载流子的分离效率，保留具有更强还原和氧化能力的光生电子和空穴，并居住在 CdZnS 的光腐蚀中。