Activation of peroxymonosulfate via g-C3N4/CeO2 heterojunction for efficient degradation of nitenpyram under visible light

被引:0
作者
Yi, Fanqi [1 ]
Li, Wenbo [1 ,2 ]
Li, Ling [1 ,2 ]
Zhou, Zhanpeng [1 ,2 ]
Tang, Rongdi [2 ]
Ding, Chunxia [3 ]
Deng, Yaocheng [1 ]
Gong, Daoxin [1 ]
机构
[1] Hunan Agr Univ, Coll Environm & Ecol, Changsha 410128, Peoples R China
[2] Hunan Agr Univ, Coll Resources, Changsha 410128, Peoples R China
[3] Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China
来源
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2025年 / 13卷 / 02期
关键词
Heterojunction; Photocatalyst; Peroxymonosulfate; Nitenpyram; Degradation; PHOTOCATALYTIC DEGRADATION; REMOVAL;
D O I
10.1016/j.jece.2025.115997
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Photocatalytic cooperation with peroxymonosulfate (PMS) is considered to be an advanced oxidation process for purifying wastewater. This research synthesized g-C3N4/CeO2 (GC) heterojunction catalysts and achieved efficient PMS activation under visible light. This catalyst has a reasonable band structure and efficient charge transfer ability. The experimental results indicated that within 60 min, the degradation efficiency of nitenpyram (NTP) by the GC/PMS/Vis system could reach 85.5 % (pH = 6.68), and the reaction rate constant was 1.74 times and 1.96 times that of the g-C3N4/PMS/Vis and CeO2/PMS/Vis systems, respectively. Additionally, this research systematically demonstrated that the GC belongs to type-II heterojunction, and employed electron spin resonance (ESR) and quenching experiments to ascertain that the system is dominated by singlet oxygen (O-1(2)), hole (h(+)), and superoxide (center dot O-2(-)). In the natural organic matter experiments and cyclic experiments, the system demonstrated excellent stability and anti-interference ability, with the degradation efficiency remaining above 80 %. These results furnish a novel perspective for the rational configuration of transition metal oxide/PMS/Vis systems and concurrently disclose new revelations regarding the degradation of neonicotinoid pesticides.
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页数:12
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