Hao Baofei, Ahmadi Younes, Zhang Tianhao, Chen Changqi, Lu Zhansheng, Ma Huizhong, Kim Ki-Hyun
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, Republic of Korea; School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, 450001, China.
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, Republic of Korea; Department of Chemistry, Sonoma State University, 1801 E Cotati Ave, Rohnert Park, CA, 94928, USA.
J Environ Manage. 2025 Sep;391:126677. doi: 10.1016/j.jenvman.2025.126677. Epub 2025 Jul 20.
Residual tetracycline (TC) in aquatic ecosystems poses a significant risk to the health of both flora and fauna. Advanced catalysts with strong photocatalytic capabilities have emerged as a promising solution for not only TC degradation but also water purification. Here, the photocatalytic destruction (PCD) of TC has been investigated using ultrathin potassium-doped g-CN/BiOBr heterojunctions (KCNx/By, where x and y are the percent mass ratio values of KOH/melamine and KCN/BiOBr, respectively). All PCD tests have been conducted under 300 W of illumination from a xenon lamp with a light intensity at the catalyst surface of 280 mW. The PCD efficiencies of the formulated KCN2/B3 (92.7 % within 30 min) are approximately 1.62 and 1.34-fold higher than those of KCN2 and BiOBr, respectively. KCN2/B3 achieves the strongest performance against TC in terms of removal-reaction kinetics (r: 0.209 mmol g h) and space-time yield (5.90E-03 molecules·photon·g) among the common photocatalysts built by g-CN- or BiOBr. The superior photocatalytic activity of KCN2/B3 can be attributed to the S-scheme charge-transmission pathway, which efficiently preserves photogenerated electrons (B3: reduction catalyst) and holes (KCN2: oxidation photocatalyst). This newly fabricated 2D/2D nanocomposite can be used in the construction of a scalable photocatalytic system for the remediation of TC in wastewater.
水生生态系统中的残留四环素（TC）对动植物健康构成重大风险。具有强大光催化能力的先进催化剂已成为一种有前景的解决方案，不仅可用于降解TC，还可用于水净化。在此，使用超薄钾掺杂g-CN/BiOBr异质结（KCNx/By，其中x和y分别是KOH/三聚氰胺和KCN/BiOBr的质量百分比值）研究了TC的光催化破坏（PCD）。所有PCD测试均在300W氙灯照射下进行，催化剂表面光强为280mW。配制的KCN2/B3的PCD效率（30分钟内为92.7%）分别比KCN2和BiOBr高约1.62倍和1.34倍。在由g-CN或BiOBr构建的常见光催化剂中，KCN2/B3在去除反应动力学（r：0.209 mmol g h）和时空产率（5.90E-03分子·光子·g）方面对TC表现出最强性能。KCN2/B3的优异光催化活性可归因于S型电荷传输途径，该途径有效地保留了光生电子（B3：还原催化剂）和空穴（KCN2：氧化光催化剂）。这种新制备的二维/二维纳米复合材料可用于构建可扩展的光催化系统，用于修复废水中的TC。
