“枣糕状”结构杂多酸离子液体负载磁性复合材料的制备及超声脱硫的催化性能

doi:10.11896/cldb.20050031

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Abstract Heteropoly acid ionic liquid [BMIM]₃PW₁₂O₄₀ was firstly synthesized, followed by being loaded on the triethylenetetramine-functionalized Fe₃O₄ (Fe₃O₄@TETA) via ultrasonic impregnation. A jujube-cake-like structure magnetic composite, i. e., [BMIM]₃PW₁₂O₄₀/Fe₃O₄@TETA was obtained. It was characterized by FTIR, XRD, VSM, XPS, TEM and SEM and used as catalyst for the oxidation of n-octane simulated oil samples with dibenzothiophene as sulfur source, via hydrogen peroxide as oxidant. The effects of ultrasonic time, H₂O₂ usage amount, and reaction temperature were investigated via the response surface methodology (RSM). The results showed that the optimized catalytic degradation rate reached 96.5% when 0.025 g [BMIM]₃PW₁₂O₄₀/Fe₃O₄@TETA was used for the desulfurization of 50 mL simulated oil sample with the concentration of dibenzothiophene at 500 mg/g. The optimum desulfurization rate was obtained when the ultrasound time was at 15 min with n(O)∶n(S) at 8∶1 and reactive temperature at 325 K. After being reused for 5 times, the catalytic degradation rate can still remained 93.7%, which indicated that the [BMIM]₃PW₁₂O₄₀/Fe₃O₄@TETA was of good catalytic desulfurization performance and can be reused. The primary desulfurization mechanism study showed that the catalytic active center might be the heteropoly acid anion of the [BMIM]₃PW₁₂O₄₀/Fe₃O₄@TETA, with the Fe₃O₄@TETA as a supporter and the ionic liquid as a cooperative enhancer, respectively.

Key words： heteropoly acid ionic liquids magnetic composite material jujube-cake-like structure oxidative desulfurization response surface methodology (RSM)

Published: 01 July 2021

CLC number:

TB332

Fund:Key Projects of Beijing Education Commission(KZ201810005008).

About author:: Dingning Chen received his B. E. degree in June 2019 from Hunan University of Science and Technology. He is currently a jointly trained graduate student of Zhejiang University and Ningbo Tech University. His research interests include wastewater purification and column packing for ion chromatography.
Haoyu Shen received her Ph. D in June 1999 from Nankai University. She is a professor of NingboTech University. Her research interests include nano-functio-nal materials and their application in the environmental chemistry.

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	CHEN Dingning
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	CHENG Jinjin
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Cite this article:

CHEN Dingning,SHEN Haoyu,CHENG Jinjin, et al. Preparation of Jujube-cake-like Structured Heteropoly Acid Ionic Liquids Supported Magnetic Composite and Its Catalytic Property for Ultrasound-assisted Desulfurization[J]. Materials Reports, 2021, 35(12): 12181-12189.

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http://www.mater-rep.com/EN/10.11896/cldb.20050031 OR http://www.mater-rep.com/EN/Y2021/V35/I12/12181

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