工业水处理 ›› 2026, Vol. 46 ›› Issue (3): 91-100. doi: 10.19965/j.cnki.iwt.2025-0308

• 试验研究 • 上一篇    下一篇

可见光驱动CuFe2O4/g-C3N4活化过一硫酸盐降解磺胺甲 唑

班福忱(), 苏静颐()   

  1. 沈阳建筑大学市政与环境工程学院,辽宁 沈阳 110168
  • 收稿日期:2025-06-26 出版日期:2026-03-20 发布日期:2026-03-30
  • 通讯作者: 苏静颐
  • 作者简介:

    班福忱(1976— ),博士,教授,E-mail:

  • 基金资助:
    国家水体污染控制与治理科技重大专项(2018ZX07601001); 辽宁省高等学校创新人才支持计划项目(Z2219003)

Visible light-driven CuFe2O4/g-C3N4 activated peroxymonosulfate for sulfamethoxazole degradation

Fuchen BAN(), Jingyi SU()   

  1. School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China
  • Received:2025-06-26 Online:2026-03-20 Published:2026-03-30
  • Contact: Jingyi SU

摘要:

采用研磨-焙烧法制备了CuFe2O4/g-C3N4(CFCN)异质结催化剂,并采用XRD、SEM、UV-Vis、XPS对其物相、形貌与光电化学性质进行表征。在可见光照射下,考察了该催化剂活化过一硫酸盐(PMS)降解水中磺胺甲 唑(SMX)的性能。结果显示,当复合催化剂中CuFe2O4质量分数为80%、投加量为1.0 g/L,SMX初始质量浓度为10 mg/L,PMS投加量为0.4 mmol/L,pH=7,温度为20 ℃(室温)时,可见光下反应30 min,SMX去除率可达94.42%,拟一级反应速率常数(k obs)为0.124 66 min-1。猝灭实验结果表明,SMX的降解是由体系中5种活性物种共同作用的结果,相对贡献率大小顺序:1O2>h+>O2 ·->·OH>SO4 ·-。另外,反应前后催化剂的XPS分析证实,CuFe2O4/g-C3N4异质结催化剂中Cu+/Cu2+和Fe2+/Fe3+氧化还原电对间存在协同作用,可以实现循环再生,从而持续活化PMS产生活性物种。该研究构建了一种高效且稳定的Vis/CFCN/PMS体系,为降解SMX等有机污染物提供了一种新思路。

关键词: 过一硫酸盐, 异质结, 光催化, CuFe2O4, g-C3N4

Abstract:

CuFe2O4/g-C3N4(CFCN) heterojunction catalyst was synthesized by a grinding-calcination method and characterized by XRD, SEM, UV-Vis, and XPS to analyze its phase composition, morphology, and photoelectrochemical properties. Under visible-light irradiation, the performance of the catalyst in activating peroxymonosulfate (PMS) to degrade sulfamethoxazole (SMX) in water was investigated. The results show that under the conditions of 80% CuFe2O4 in the composite, catalyst dosage of 1.0 g/L, initial SMX concentration of 10 mg/L, PMS dosage of 0.4 mmol/L, pH of 7, and temperature of 20 ℃ (room temperature), the SMX removal efficiency reached 94.42% after 30 min of reaction under visible light, with a corresponding first-order rate constant (k obs) of 0.124 66 min-1. Quenching experiments revealed that the degradation of SMX resulted from the combined action of five reactive species in the system, with the relative contributions ranking as follows: 1O2>h+>O2 ·->·OH>SO4 ·-. Furthermore, XPS analysis of the catalysts before and after the reaction confirmed the synergistic interaction between the Cu+/Cu2+ and Fe2+/Fe3+ redox couples in the CuFe2O4/g-C3N4 heterojunction, enabling their cyclic regeneration and thus sustained activation of PMS to generate reactive species. This study established a highly efficient and stable Vis/CFCN/PMS system, which provided a new strategy for degrading SMX and other organic pollutants.

Key words: peroxymonosulfate, heterojunction, photocatalysis, CuFe2O4, g-C3N4

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