The photothermal effect generated under illumination can increase the surface temperature of the catalyst, and enhance the migration rate of the photogenerated carrier and the activity of the catalytic reaction, which is an effective way to promote photocatalytic degradation of pollutants. In this study, a Z-scheme BiVO/CuBiO (BVO-CBO) heterojunction with 0D/1D structure was prepared by hydrothermal method. Compared with pure BVO and CBO, the temperature of the Z-scheme BVO-CBO heterojunction can reach 90.1°C after 180 S illumination, and the temperature of the BVO-CBO+TC solution system can rise to 39.5°C after 10 min, which has higher heating rate and photocatalytic performance than the monomer catalyst. The experimental results showed that the photogenerated electron transfer pathway combined with the photothermal effect effectively promoted the separation of photogenerated carriers and maintained a strong redox potential, so that the removal rate of tetracycline (TC) by BVO-CBO reached 85.0 % within 90 minutes, which was significantly higher than that of pure BVO (39 %) and CBO (33 %). In addition, the toxicity of intermediate products gradually decreased during TC degradation. In addition, the effects of reaction temperature, pH, concentration of TC, common aquatic substrates and simulated natural water on TC removal were also studied. The combination of its structural advantages, redox capabilities, and photothermal effect provided a promising approach to the treatment of antibiotic-contaminated water.

中文翻译：

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BiVO4/CuBi2O4 Z型异质结光热辅助光催化降解模拟天然水中的四环素：机制洞察、降解途径和毒性评估


光照下产生的光热效应可以提高催化剂的表面温度，增强光生载流子的迁移速率和催化反应的活性，是促进光催化降解污染物的有效途径。本研究采用水热法制备了具有0D/1D结构的Z型BiVO/CuBiO（BVO-CBO）异质结。与纯BVO和CBO相比，Z型BVO-CBO异质结在光照180S后温度可达到90.1℃，BVO-CBO+TC溶液体系在10min后温度可升至39.5℃，比单体催化剂具有更高的升温速率和光催化性能。实验结果表明，光生电子转移途径与光热效应相结合，有效促进了光生载流子的分离，并保持了较强的氧化还原电位，使得BVO-CBO在90分钟内对四环素（TC）的去除率达到85.0%，显着高于纯 BVO (39%) 和 CBO (33%)。此外，TC降解过程中中间产物的毒性逐渐降低。此外，还研究了反应温度、pH、TC浓度、常见水生基质和模拟天然水体对TC去除的影响。其结构优势、氧化还原能力和光热效应的结合为处理抗生素污染的水提供了一种有前景的方法。