摘要
针对水中新污染物抗生素氧氟沙星(OFX)的处理,以类石墨相氮化碳(g-C_(3)N_(4))和偏锡酸锌(ZnSnO_(3))为材料制备了一种新型钙钛矿材料ZnSnO_(3)/g-C_(3)N_(4),ZnSnO_(3)/g-C_(3)N_(4)具有稳定的层状结构且富有C-N,C-O,C-N-H等官能团。通过实验探究表明,在ZnSnO_(3)与g-C_(3)N_(4)掺杂比为5∶1,ZnSnO_(3)/g-C_(3)N_(4)投加量为0.1 g,过硫酸盐(PS)投加量为0.05 g,pH为7以及温度为25℃的反应条件下,ZnSnO_(3)/g-C_(3)N_(4)材料压电催化活化PS降解OFX在80 min时对OFX的降解率达到90%,降解效果远高于单独g-C_(3)N_(4)(11%)和单独ZnSnO_(3)(29%),在该反应体系中,·OH和SO_(4)^(-)·是整个催化过程起重要作用的活性物质。通过制备得到稳定性和压电催化性能较好的ZnSnO_(3)/g-C_(3)N_(4)材料,可应用于压电催化活化PS产生自由基有效的降解水中新污染物。
For the treatment of new pollutant of antibiotic ofloxacin(OFX)in water,a new chalcogenide material ZnSnO_(3)/g-C_(3)N_(4)was prepared by using graphite-like phase carbon nitride(g-C_(3)N_(4))and zinc metastannate(ZnSnO_(3)),which had a stable layered structure and was rich in functional groups such as C-N,C-O,C-N-H.The reaction conditions of 5:1 doping ratio of ZnSnO_(3)and g-C_(3)N_(4),0.1 g of ZnSnO_(3)/g-C_(3)N_(4)dosage,0.05 g of persulfate(PS)dosage,pH at 7,and temperature was 25℃,the piezoelectrocatalytic activation of PS in ZnSnO_(3)/g-C_(3)N_(4)material degradation rate of OFX reached 90%at 80 min,which was much higher than that of g-C_(3)N_(4)alone(11%)and ZnSnO_(3)alone(29%).The catalytically generated SO_(4)^(-)·and·OH played a major role in this reaction system.The ZnSnO_(3)/g-C_(3)N_(4)materials with better stability and piezocatalytic performance were obtained by preparation,which can be applied to the piezocatalytic activation of PS to generate free radicals for effective degradation of new pollutants in water.
作者
陈俊
杜明霞
杨小红
滕大伟
吕东
CHEN Jun;DU Mingxia;YANG Xiaohong;TENG Dawei;LV Dong(School of Biology,Food and Environment,Hefei University,Hefei 230601,China)
出处
《佳木斯大学学报(自然科学版)》
2025年第7期170-173,共4页
Journal of Jiamusi University:Natural Science Edition
基金
合肥大学安徽省通源环境节能股份有限公司合作实践教育基地(2023xqhz043)
安徽省通源环境节能股份有限公司合肥学院资源与环境研究生联合培养示范基地(皖教秘科[2022]40号)
合肥大学技术开发项目(2023340104006007)。
关键词
压电催化
过硫酸盐
氧氟沙星
piezoelectric catalysis
persulfate
ofloxacin
