物理化学学报 >> 2026, Vol. 42 >> Issue (10): 100337.doi: 10.1016/j.actphy.2026.100337

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平衡光催化效率与生态安全:一种S型LaCoO3/PTP-DABDT异质结无害“杀灭-清除”藻华

赵月1,2, 张杰3, 吴明灿3,*(), 赵丽2, 王安安4, 戚克振1,*()   

  1. 1 大理大学药学院, 云南 大理 671000
    2 湖北大学, 教育部绿色功能材料制备与应用重点实验室, 湖北省高分子材料重点实验室, 湖北省先进有机化学材料协同创新中心, 湖北 武汉 430062
    3 大理大学农学与生物科学学院, 云南 大理 671003
    4 大理大学经济与管理学院, 云南 大理 671003
  • 收稿日期:2026-04-08 修回日期:2026-06-01 录用日期:2026-06-01 发布日期:2026-09-03
  • 通讯作者: Email: wmc@dali.edu.cn (吴明灿)qkzh2003@aliyun.com (戚克振)

Balancing photocatalytic efficiency and ecological safety: an S-scheme LaCoO3/PTP-DABDT heterojunction for "Kill-and-Clean" algal bloom control without secondary pollution

Yue Zhao1,2, Jie Zhang3, Mingcan Wu3,*(), Li Zhao2, Anan Wang4, Kezhen Qi1,*()   

  1. 1 College of Pharmacy, Dali University, Dali 671000, Yunnan Province, China
    2 Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan 430062, Hubei Province, China
    3 College of Agriculture and Biological Science, Dali University, Dali 671003, Yunnan Province, China
    4 School of Economics and Management, Dali University, Dali 671003, Yunnan Province, China
  • Received:2026-04-08 Revised:2026-06-01 Accepted:2026-06-01 Published:2026-09-03
  • Contact: Email: wmc@dali.edu.cn (Mingcan Wu)qkzh2003@aliyun.com (Kezhen Qi)

摘要:

高效灭藻与生态安全之间的矛盾是光催化治理有害藻华(HABs)的关键瓶颈。传统铜基光催化剂虽具有灭藻效果,但常引发严重的二次污染与水生态毒性。为解决这一矛盾,我们通过将LaCoO3 (LCO)钙钛矿八面体共价锚定于2,4,6-三羟基苯-1,3,5-三甲醛(TP)和2,5-二氨基-1,4-苯二硫醇二盐酸盐(DABDT)溶剂热聚合而成的PTP-DABDT酰胺-亚胺功能骨架上,构建了具有生物安全性的S型异质结光催化材料。飞秒瞬态吸收光谱(fs-TA)和原位光照X射线光电子能谱(XPS)等证实了内建电场(IEF)的形成。该电场驱动超快S型电荷转移,在保持强氧化还原电势的同时能够有效抑制载流子复合。因此,改良后的20LCO/PTP-DABDT复合材料展现出优异的“杀藻-净化”协同性能:在铜绿微囊藻中实现64.39%叶绿素a降解以抑制藻华增殖,同时降解藻细胞释放的微囊藻毒素。更重要的是,对比毒性分析揭示了范式转变——传统铜基杀藻剂会导致非靶标生物(花鲈)100%死亡,而本体系存活率始终高于90%。本研究提出开创性的“生态调控”策略,为兼顾高效灭藻与环境生物安全性提供了可持续解决方案。

关键词: 酰胺-亚胺功能聚合物, 有害藻类, S型异质结, 铜绿微囊藻, 生态安全评估

Abstract:

The conflict between high-efficiency algal inactivation and ecological safety represents a critical bottleneck in the photocatalytic control of harmful algal blooms (HABs). Conventional copper-based photocatalysts, although effective, often cause severe secondary pollution and aquatic toxicity. To address this trade-off, we constructed a biologically safe S-scheme heterojunction by covalently anchoring LaCoO3 (LCO) octahedrons onto PTP-DABDT amide-imine functional polymers, which were fabricated via solvothermal polymerization of 2,4,6-trihydroxybenzene-1,3,5-tricarbaldehyde (TP) and 2,5-diamino-1,4-benzenedithiol dihydrochloride. Unambiguous spectroscopic evidence, including femtosecond transient absorption (fs-TA) spectroscopy and in-situ irradiated X-ray photoelectron spectroscopy (XPS), confirms the formation of an internal electric field (IEF). This field drives ultrafast S-scheme charge transfer, effectively suppressing charge-carrier recombination while preserving strong redox potentials. Consequently, the optimized 20LCO/PTP-DABDT composite exhibits a remarkable "Kill-and-Clean" effect, achieving 64.39% degradation of chlorophyll-a in Microcystis aeruginosa to suppress algal blooms while simultaneously degrading the released microcystins. More importantly, comparative toxicity analysis reveals a paradigm shift: unlike conventional Cu-based algicides, which induce 100% mortality in non-target organisms (Lateolabrax japonicus), our system maintains a survival rate exceeding 90%. This study presents a pioneering "ecological regulation" strategy, offering a sustainable solution that balances efficient algal inactivation with intrinsic environmental biosafety.

Key words: Amide-imine functional polymer, Harmful algae, S-scheme heterojunction, Microcystis aeruginosa, Ecological safety assessment