BaFe2O4/BaSO4复合光催化剂的制备及降解罗丹明B废水的活性研究

doi:10.19964/j.issn.1006-4990.2020-0437

摘要/Abstract

摘要：

采用化学法、传统溶胶凝胶法和低温烧结技术合成了BaSO₄、BaFe₂O₄和BaSO₄/BaFe₂O₄复合物光催化剂。X射线粉末衍射和傅里叶红外光谱分析表明,BaSO₄和BaFe₂O₄复合后未改变主晶格相的结构。表面形貌分析发现,BaSO₄颗粒细小均匀,BaFe₂O₄颗粒较大且形貌不规则;当二者复合后颗粒尺寸变化较为明显。紫外可见吸收谱分析表明,5%BaSO₄/BaFe₂O₄复合物光催化剂具有强的紫外可见光吸收能力;BaSO₄、BaFe₂O₄、5%BaSO₄/BaFe₂O₄和10%BaSO₄/BaFe₂O₄复合物光催化剂的E_g值分别为3.23、2.89、2.74、2.26 eV。光催化结果表明,5%BaSO₄/BaFe₂O₄光催化剂在降解罗丹明B染料方面比其他几种催化剂显示出了更高的光催化活性。光催化机理分析发现,空穴、羟基自由基和超氧自由基在染料降解过程中扮演了至关重要的角色。

关键词: 溶胶凝胶法, 复合物, BaSO₄, BaFe₂O₄, 光催化活性

Abstract:

：The BaSO₄,BaFe₂O₄ and BaSO₄/BaFe₂O₄ composite photocatalysts were synthesized by the chemical method,tradi-tional sol-gel method and low temperature sintering technique.X-ray powder diffraction and fourier transform infrared spec-troscopy analysis showed that the structure of the main lattice phase did not change after the combination of BaSO₄ and BaFe₂O₄.The surface morphology analysis showed that the BaSO₄ particles were fine and uniform,while BaFe₂O₄ particles were large and had irregular morphology.When the BaSO₄ and BaFe₂O₄ were combined,the particle size changed obviously.UV-vis absorption spectra showed that 5%BaSO₄/BaFe₂O₄ composite photocatalyst had strong UV-vis light absorption capac-ity.The E_g values of BaSO₄,BaFe₂O₄,5%BaSO₄/BaFe₂O₄ and 10%BaSO₄/BaFe₂O₄ photocatalysts were about 3.23,2.89,2.74 and 2.26 eV,respectively.The photocatalytic results showed that the 5%BaSO₄/BaFe₂O₄ photocatalyst showed the highest pho-tocatalytic activity for the degradation of Rhodamine B dye than that of other catalysts.The analysis of photocatalytic mechanism showed that hole,hydroxyl radical and superoxide radical played important roles in dye degradation process.

Key words: sol-gel method, composite, BaSO₄, BaFe₂O₄, photocatalytic activity

中图分类号:

O643.36

郑伟,侯芳,高喜平. BaFe₂O₄/BaSO₄复合光催化剂的制备及降解罗丹明B废水的活性研究[J]. 无机盐工业, 2021, 53(7): 113-118.

Zheng Wei,Hou Fang,Gao Xiping. Preparation of BaFe₂O₄/BaSO₄ composite photocatalyst and study on the photocatalytic activity of degrading rhodamine B wastewater discharged from food processing plant[J]. Inorganic Chemicals Industry, 2021, 53(7): 113-118.

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样品	颜色参数						E_g /eV
样品	L*	a*	b*	c*	H°	ΔE_CIE^*	E_g /eV
S1	95.32	-10.11	19.72	22.16	-62.86	97.86	3.23
S2	63.69	2.45	15.51	15.70	81.02	65.60	2.89
S3	75.38	3.67	20.33	20.66	79.77	78.16	2.74
S4	72.11	4.59	22.55	23.01	78.49	75.69	2.26

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BaFe₂O₄/BaSO₄复合光催化剂的制备及降解罗丹明B废水的活性研究

Preparation of BaFe₂O₄/BaSO₄ composite photocatalyst and study on the photocatalytic activity of degrading rhodamine B wastewater discharged from food processing plant

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