期刊信息

  • 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
  • 主办： 河北师范大学
  • ISSN： 1000-5854
  • CN： 13-1061/N
  • 中国科技核心期刊
  • 中国期刊方阵入选期刊
  • 中国高校优秀科技期刊
  • 华北优秀期刊
  • 河北省优秀科技期刊

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高活性α-Fe2O3/BiOI复合物的制备及其光催化降解性能

  • (河北师范大学 化学与材料科学学院,石家庄 050024)
  • DOI： 10.13763/j.cnki.jhebnu.nse.202503014

Preparation and Photocatalytic Degradation Performance of Highly Active α-Fe2O3/BiOI Composites

摘要/Abstract

摘要：

通过共同添加一定量的H2PO4-和SO24-，制备出高活性的α-Fe2O3(PSF)纳米环，再经水热法合成了α-Fe2O3/BiOI（PSF/BiOI) n-p型异质结复合物，并对其光催化降解罗丹明B（RhB）的性能及机理进行了研究.结果表明，所制备的PSF较纯α-Fe2O3具有更高的比表面积和氧空位（OVs）浓度,表面催化活性增强.PSF/BiOI 异质结复合物的形成可有效提高光生载流子的分离和迁移能力，与单组分相比，PSF/BiOI 对RhB的可见光催化降解性能显著提升，其中n(PSF)∶n(BiOI)=0.5∶1的PSF/BiOI（PSF/B-2)复合物的光催化降解活性最佳.在光-Fenton，OVs和异质结效应的协同作用下，复合物降解体系可生成较多的活性物种，实现了RhB的高效快速降解.

Abstract：

The highly active α-Fe2O3(PSF) nanorings were prepared by co-addition of H2PO4- and SO24-.Then the α-Fe2O3/BiOI(PSF/BiOI) n-p heterojunction composites were synthesized by hydrothermal method.The performance and mechanism for the photocatalytic degradation of Rhodamine B(RhB) were investigated.The results showed that the prepared PSF had increased specific surface area and oxygen vacancy(OVs) concentration compared to pure α-Fe2O3,with enhanced surface catalytic activity.The formation of PSF/BiOI heterojunction composites improved the ability of carrier separation and migration，and PSF/BiOI significantly improved the visible-light photocatalytic degradation of RhB compared with single component.The PSF/BiOI（PSF/B-2) composite(n(PSF)∶n(BiOI)=0.5∶1) had the best photocatalytic activity.Under the synergistic effect of photo-Fenton,OVs and heterojunction，more active species could be produced in the composite degradation system，which realized the efficient and rapid degradation of RhB.

关键词

关键词： α-Fe2O3/BiOI ; 异质结 ; 水热法 ; 罗丹明B ; 光催化降解
Key words： α-Fe2O3/BiOI ; heterojunction ; hydrothermal method ; Rhodamine B ; photocatalytic degradation

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