Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes | |
Guan, Sitao1; Yang, Hua1; Sun, Xiaofeng2; Xian, Tao2 | |
2020-02 | |
发表期刊 | Optical Materials |
ISSN | 09253467 |
卷号 | 100 |
摘要 | Herein we have designed and fabricated a new type of LaFeO3/BiOBr heterojunction photocatalysts with Z-scheme charge transfer mechanism. The composite photocatalysts were constructed by coupling LaFeO3 nanoparticles with BiOBr microplates. Various advanced characterization techniques (e.g., SEM, TEM, XRD, UV–vis DRS, XPS, PL spectroscopy, FTIR photoelectrochemical measurements) were employed to elucidate the structures, micro-morphologies, element/composition valence states, optical absorption properties, surface functional groups and electron/hole pair separation behavior of the prepared LaFeO3/BiOBr photocatalysts. The photocatalytic and photo-Fenton degradation activities of the as-prepared LaFeO3/BiOBr photocatalysts were investigated by decomposing rhodamine B (RhB) aqueous solution, where simulated sunlight was used as the light source. Among the samples, the 20%LaFeO3/BiOBr composite photocatalyst manifests the highest photocatalytic degradation performance for RhB (η = 98.2% for 30 min reaction). The photodegradation activity of 20%LaFeO3/BiOBr is determined from the reaction rate constants to be about 21.0 and 1.3 times as large as that of bare LaFeO3 nanoparticles and BiOBr mcroplates, respectively. Furthermore, by adding an amount of H2O2 in the reaction solution, the photo-Fenton decomposition performances of the LaFeO3/BiOBr photocatalysts can be further enhanced. Z-scheme electron transfer process and photo-Fenton synergistic mechanism were used to explain the improved photodegradation and photo-Fenton degradation performances of the LaFeO3/BiOBr heterojunction photocatalysts. © 2019 Elsevier B.V. |
关键词 | Bromine compounds Charge transfer Decomposition Electron transport properties Fourier transform infrared spectroscopy Heterojunctions Image enhancement Iron compounds Lanthanum compounds Light absorption Light sources Nanoparticles Optical properties Oxidation Photocatalytic activity Photodegradation Rate constants Rhodamine B Rhodium compounds Stripping (dyes) Characterization techniques Charge transfer mechanisms Microplates Optical absorption properties Photo catalytic degradation Photo-fenton degradation Photoelectrochemical measurements Surface functional groups |
DOI | 10.1016/j.optmat.2019.109644 |
收录类别 | EI ; SCIE |
语种 | 英语 |
WOS研究方向 | Materials Science ; Optics |
WOS类目 | Materials Science, Multidisciplinary ; Optics |
WOS记录号 | WOS:000521515700027 |
出版者 | Elsevier B.V., Netherlands |
EI入藏号 | 20200107971994 |
EI主题词 | Bismuth compounds |
EI分类号 | 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 933 Solid State Physics |
来源库 | Compendex |
分类代码 | 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 933 Solid State Physics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/115497 |
专题 | 理学院 |
通讯作者 | Yang, Hua |
作者单位 | 1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China; 2.Qinghai Normal Univ, Coll Phys & Elect Informat Engn, Xining 810008, Peoples R China |
第一作者单位 | 理学院 |
通讯作者单位 | 理学院 |
第一作者的第一单位 | 理学院 |
推荐引用方式 GB/T 7714 | Guan, Sitao,Yang, Hua,Sun, Xiaofeng,et al. Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes[J]. Optical Materials,2020,100. |
APA | Guan, Sitao,Yang, Hua,Sun, Xiaofeng,&Xian, Tao.(2020).Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes.Optical Materials,100. |
MLA | Guan, Sitao,et al."Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes".Optical Materials 100(2020). |
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