摘要
光催化技术能有效解决日益严重的水污染问题,其中心是高效光催化材料的设计与合成。本文采用溶剂热法成功制备了石墨烯/四氧化三铁复合材料,通过实验探究不同pH值、不同质量比、不同投加量以及Cr(Ⅵ)浓度对石墨烯/四氧化三铁复合材料光催化活性的影响。采用扫描电子显微镜(SEM)、X射线衍射技术(XRD)对复合材料进行表征,结果显示复合材料粒径均匀,粒径约为200~300 nm,四氧化三铁纯度较高且具有反尖晶石结构。光催化性能实验结果表明:Cr(Ⅵ)溶液的质量浓度为100 mg/L,pH值为4,复合材料投加量为60 mg,石墨烯/四氧化三铁复合材料(质量分数4%)光催化去除Cr(Ⅵ)的效果最佳,去除率可达91.7%。
Photocatalytic technology can effectively solve the increasingly serious problem of water pollution,its center is the design and synthesis of efficient photocatalytic materials.In this paper,graphene/ferroferric oxide composites were successfully prepared by solvothermal method.The effects of graphene/ferroferric oxide composites on the photocatalytic activity of Cr(Ⅵ)under different pH,different mass ratio,different dosage and different initial concentration of Cr(Ⅵ)solution were investigated experimentally.Scanning electron microscopy(SEM)and X-ray diffraction(XRD)were used to characterize the composite.The results showed that the particle size of the composite was uniform,with a particle size of about 200~300 nm.The purity of ferroferric oxide was high and the structure of the composite was antipinel.The experimental results of photocatalytic performance show that graphene/ferroferric oxide composites have certain photocatalytic performance.At room temperature,the concentration of Cr(Ⅵ)solution is 100 mg/L,pH value is 4,the dosage of adsorbent is 60 mg,and the ratio of graphene/ferroferric oxide is 4%.The degradation rate of graphene/ferroferric oxide composites can reach 91.7%.
作者
赵沅佳
胡思琪
邵秀丽
王萍萍
Zhao Yuanjia;Hu Siqi;Shao Xiuli;Wang Pingping(College of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang 621000,China)
出处
《山东化工》
CAS
2023年第1期19-22,32,共5页
Shandong Chemical Industry
基金
绵阳师范学院科研启动项目(QD2020A05)
绵阳师范学院示范课程项目(MnuJY2074)。
关键词
光催化
石墨烯
四氧化三铁
复合材料
Cr(Ⅵ)
photochemical catalysis
graphene
ferroferric oxide
composite material
chromium ion(Ⅵ)
