Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China.
Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China.
Int J Environ Res Public Health. 2022 Nov 13;19(22):14935. doi: 10.3390/ijerph192214935.
BiWO-based heterojunction photocatalyst for antibiotic degradation has been a research hotspot, but its photocatalytic performance needs to be further improved. Therefore, 2D/2D P-doped g-CN/BiWO direct Z-scheme heterojunction photocatalysts with different composition ratios were prepared through three strategies of phosphorus (P) element doping, morphology regulation, and heterojunction, and the efficiency of its degradation of tetracycline hydrochloride (TC-HCl) under visible light was studied. Their structural, optical, and electronic properties were evaluated, and their photocatalytic efficiency for TC-HCl degradation was explored with a detailed assessment of the active species, degradation pathways, and effects of humic acid, different anions and cations, and water sources. The 30% P-doped g-CN/BiWO had the best photocatalytic performance for TC-HCl degradation. Its photocatalytic rate was 4.5-, 2.2-, and 1.9-times greater than that of g-CN, P-doped g-CN, and BiWO, respectively. The improved photocatalytic efficiency was attributed to the synergistic effect of P doping and 2D/2D direct Z-scheme heterojunction construction. The stability and reusability of the 30% P-doped CN/BiWO were confirmed by cyclic degradation experiments. Radical scavenging experiments and electron spin resonance spectroscopy showed that the main active species were •O and h. This work provides a new strategy for the preparation of direct Z-scheme heterojunction catalysts with high catalytic performance.
基于 BiWO 的抗生素降解异质结光催化剂一直是研究热点，但仍需进一步提高其光催化性能。因此，采用磷（P）元素掺杂、形貌调控和异质结三种策略，制备了不同组成比例的 2D/2D P 掺杂 g-CN/BiWO 直接 Z 型异质结光催化剂，并研究了其在可见光下对盐酸四环素（TC-HCl）的降解效率。评估了它们的结构、光学和电子性能，并详细评估了活性物质、降解途径以及腐殖酸、不同阴离子和阳离子以及水源的影响，探讨了其对 TC-HCl 降解的光催化效率。30% P 掺杂 g-CN/BiWO 对 TC-HCl 的光催化降解性能最好。其光催化速率分别是 g-CN、P 掺杂 g-CN 和 BiWO 的 4.5、2.2 和 1.9 倍。提高的光催化效率归因于 P 掺杂和 2D/2D 直接 Z 型异质结构建的协同效应。通过循环降解实验证实了 30% P 掺杂 CN/BiWO 的稳定性和可重复使用性。自由基捕获实验和电子顺磁共振光谱表明，主要的活性物质是 •O 和 h。这项工作为制备具有高催化性能的直接 Z 型异质结催化剂提供了一种新策略。
