Constructing heterojunction photocatalyst is an effective method to enhance the separation of photogenerated electron and hole, which significantly improves ability of visible light response. In this study, calcination methods have been proposed to prepare highly efficient magnetic ternary photocatalyst g-C₃N₄/TiO₂-MnFe₂O₄ halloysite. It showed an enhanced photocatalytic degradation for dyes (crystal violet) and nonsteroidal anti-inflammatory drugs (acetaminophen) under vision light irradiation. Compared to pure g-C₃N₄, TiO₂, MnFe₂O₄ halloysite and binary g-C₃N₄-MnFe₂O₄ halloysite, the optimized ternary g-C₃N₄/TiO₂-MnFe₂O₄ halloysite displayed enhanced photodegradation efficiency with 91.1% removal of crystal violet (10ppm) in 90min under visible light irradiation, the optimized ternary g-C₃N₄/TiO₂-MnFe₂O₄ halloysite composite showed significantly enhanced photocatalytic activity with more than 79.1% removal of acetaminophen (10ppm) within 90min under visible light. The photocatalytic mechanism was identified through the free radical quenching experiment. The heterojunction photocatalyst could be easily recovered by an extra magnetic field and reused several times without any obvious deterioration in catalytic activity. Besides, the ternary heterojunction also exhibited antibacterial ability against Escherichia coli. The superior photocatalytic performance of composite should be mainly attributed to both the improvement of light harvesting as well as the enhanced separation and transfer efficiency. It is expected that this novel ternary visible-light responding composite would be a promising candidate material for organic pollutants degradation and bacteria inactivation.

中文翻译：

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具有增强的可见光光催化活性和抗菌性能的磁可回收 g-C3N4/TiO2-MnFe2O4 埃洛石复合材料的构建

构建异质结光催化剂是增强光生电子与空穴分离的有效方法，可显着提高可见光响应能力。本研究提出了煅烧方法制备高效磁性三元光催化剂gC ₃ N ₄ /TiO ₂ -MnFe ₂ O ₄埃洛石。它在视觉光照射下显示出增强的染料（结晶紫）和非甾体抗炎药（对乙酰氨基酚）的光催化降解。与纯 gC ₃ N ₄、TiO ₂、MnFe ₂ O ₄埃洛石和二元 gC _3相比N ₄ -MnFe ₂ O ₄埃洛石，优化的三元 gC ₃ N ₄ /TiO ₂ -MnFe ₂ O ₄埃洛石显示出提高的光降解效率，去除了 91.1% 的结晶紫（10ppm) 在 90min 在可见光照射下，优化的三元 gC ₃ N ₄ /TiO ₂ -MnFe ₂ O ₄埃洛石复合材料显示出显着增强的光催化活性，对乙酰氨基酚去除率超过 79.1%（10ppm) 90 以内分钟可见光下。通过自由基猝灭实验确定了光催化机理。异质结光催化剂可以很容易地通过额外的磁场回收并重复使用多次而催化活性没有明显下降。此外，三元异质结还表现出抗菌能力大肠杆菌. 复合材料优异的光催化性能主要归功于光捕获的改进以及分离和转移效率的提高。预计这种新型三元可见光响应复合材料将成为有机污染物降解和细菌灭活的有希望的候选材料。