Tetracycline antibiotics have attracted attention due to their difficulty in being degraded by the natural environment. In this work, 2D/3D mesoporous graphitic carbon nitride (mpg-C3N4)/ zinc oxide (ZnO) hollow nanocage (MCNZH) complexes with Z-scheme heterostructure were prepared for the photocatalytic degradation of tetracycline antibiotics. The catalysts were characterized by SEM, TEM, BET, XRD, FT-IR, EIS, etc. The degradation of tetracycline hydrochloride (40 mg L–1) by MCNZH (1.2 g L–1) can reach 92.08 %. Further, the energy band structure of the catalysts were calculated and the possible degradation mechanism was proposed. The results showed that ·OH– and ·O2– were the main active species, and the internal electric field suppressed the compounding of photogenerated carriers. The catalysts exhibited broad-spectrum degradation of tetracycline antibiotics. Practical sample spiking experiments on soil and river water confirmed its practicability, which provide great significance for the application of the photocatalytic technology in the practical environmental purification.

中文翻译：

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具有内置驱动 Z 型异质结构的 2D/3D mpg-C3N4/ZnO 纳米笼的简单合成：四环素类抗生素的光催化降解并解除复杂水环境的局限性


四环素类抗生素因其难以被自然环境降解而受到关注。在本工作中，制备了具有 Z 型异质结构的 2D/3D 介孔石墨氮化碳 （mpg-C3N4）/氧化锌 （ZnO） 空心纳米笼 （MCNZH） 配合物，用于光催化降解四环素类抗生素。用 SEM、TEM、BET、XRD、FT-IR、EIS 等对催化剂进行了表征。MCNZH （1.2 g L-1） 对盐酸四环素 （40 mg L-1） 的降解率可达 92.08 %。此外，计算了催化剂的能带结构，并提出了可能的降解机理。结果表明 ·OH– 和 ·O2– 是主要的活性物质，内部电场抑制了光生载流子的复合。催化剂表现出四环素类抗生素的广谱降解。在土壤和河水中进行实际样品加标实验，证实了其实用性，为光催化技术在实际环境净化中的应用提供了重要意义。