Abstract
Heterogeneous solid base catalysts have attracted widespread attention for various reactions from the perspective of green and economy chemistry due to their advantages such as low corrosiveness, high reaction efficiency, and easy separation. The unique properties of polyacrylonitrile fibers (PANF) such as good mechanical strength and a surface rich in cyanine and economy make them suitable catalytic supports. Herein, potassium oxide was introduced into PANF by redox strategy. Characterization using XRD, FT-IR, solid-state 13C NMR, XPS, SEM, CO2-TPD, etc. confirmed the successful preparation of this heterogeneous base catalyst and the participation of PANF in the redox process of KNO3 to promote the decomposition of KNO3. The acquired catalyst showed obvious activity for the oxidation of methylene compounds and the yield of fluorenones can reach 100% at 100 °C. This strategy provides a new development path for the application of PANF and the synthesis of heterogeneous bases.
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Acknowledgements
This work was supported in part by the following funds: National Key Research and Development Program of China (Grant No. 2022YFA1504900), National Natural Science Foundation of China (Grant Nos. 22072147, 22372168), the Youth Innovation Promotion Association, the Chinese Academy of Sciences (Grant No. 2021178) and Dalian Innovation Support Plan for High Level Talents (Grant No. 2020RT10). Thanks to Prof. Jie Xu and Prof Jin Gao for their guidance and help.
Funding
Funding was provided by Youth Innovation Promotion Association, the Chinese Academy of Sciences (Grant No. 2021178), National Natural Science Foundation of China (Grant Nos. 22072147, 22372168), National Key Research and Development Program of China (Grant No. 2022YFA1504900), Dalian Innovation Support Plan for High Level Talents (Grant No. 2020RT10).
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SS and XW designed the research. XZ performed the catalytic reaction, established analysis method and completed the paper. YW, XF, JC, XG, WY participated in beneficial discussions. General guidance was done by SS. All authors reviewed and commented on the manuscript.
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Zheng, X., Wang, Y., Feng, X. et al. Generation of Strong Basic Sites on Polyacrylonitrile Fiber as Catalysts for Oxidation of Methylene Compounds. Catal Lett (2024). https://doi.org/10.1007/s10562-024-04633-x
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DOI: https://doi.org/10.1007/s10562-024-04633-x