响应面法优化静电纺丝法制备BiFeO3的工艺研究
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新疆农业大学资源与环境学院

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X703;O644.1

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新疆维吾尔自治区自然科学基金(2022D01A201)


Optimization of Electrospinning Process for Preparation of BiFeO3 by Response Surface Methodology
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College of Resources and Environment, Xinjiang Agricultural University

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    摘要:

    铁酸铋其较窄的带隙、较高的化学稳定性、较好的可见光响应能力等优势使之成为降解多种废水的有效半导体光催化剂。采用静电纺丝法制备纯相BiFeO3纳米纤维,通过煅烧温度、PVP浓度、收集距离、纺丝电压、推料速度等单因素试验得到对刚果红最佳降解条件后,选择对光催化效率有显著影响的四个因素,进行四因素三水平的响应面分析试验,经过优化得到最优PVP浓度为12.17 wt%、收集距离为14.07 cm、纺丝电压为12.03 kV、推料速度为0.74 um·s-1,在此条件下BiFeO3光催化降解刚果红的效率可达90.43%。利用X射线衍射、扫描电子显微镜、拉曼光谱、傅里叶变换红外光谱对铁酸铋纳米纤维进行物相分析和形貌表征,结果表明静电纺丝法制备的纯相BFO纳米纤维表面粗糙有明显的颗粒感,呈一维棒管状结构,尺寸约为300 nm,这种纳米棒管结构具有更大的比表面积及更多的活性位点,能够提高BFO光催化降解效率。

    Abstract:

    Bismuth ferrite has become an effective semiconductor photocatalyst for the degradation of various wastewaters due to its narrow band gap, high chemical stability, and good visible light response. Pure phase BiFeO3 nanofibers were prepared by electrospinning method. The optimal degradation conditions for Congo Red were obtained through single factor experiments such as calcination temperature, PVP concentration, collection distance, spinning voltage, and pushing speed. Four factors that significantly affect photocatalytic efficiency were selected for response surface analysis experiments with four factors and three levels. After optimization, the optimal PVP concentration was 12.17 wt%, collection distance was 14.07 cm, and spinning voltage was 12.03 kV The pushing speed is 0.74 um·s-1, and under this condition, the efficiency of BiFeO3 photocatalytic degradation of Congo red can reach 90.43%. The phase analysis and morphology characterization of bismuth ferrite nanofibers were carried out using X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and Fourier transform infrared spectroscopy. The results showed that the pure phase BFO nanofibers prepared by electrospinning had a rough surface and obvious particle sensation, presenting a one-dimensional rod-shaped structure with a size of about 300 nm. This nanorod-shaped structure has a larger specific surface area and more active sites, Can improve the photocatalytic degradation efficiency of BFO.

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李艳美,张佳睿,匡代洪,等. 响应面法优化静电纺丝法制备BiFeO3的工艺研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-11-13
  • 最后修改日期:2024-06-06
  • 录用日期:2024-06-08
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