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    王新平

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:中国科学院长春应用化学研究所
    • 学位:博士
    • 所在单位:化工学院
    • 学科:物理化学
    • 电子邮箱:dllgwxp@dlut.edu.cn

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    Rapid synthesis of uniform nano-sized silicalite-1 zeolite crystals under atmospheric pressure without wastes discharge

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    论文类型:期刊论文

    发表时间:2020-02-15

    发表刊物:CHEMICAL ENGINEERING JOURNAL

    收录刊物:EI、SCIE

    卷号:382

    ISSN号:1385-8947

    关键字:Low temperature; Atmospheric pressure; Rapid synthesis; No wastes; Silicalite-1; Silanol nests

    摘要:Zeolites have been widely applied in industrial processes, such as catalysis, adsorption, separation, while their syntheses generally suffer from environmental, safety, and efficiency issues. Herein, we report a fast synthesis of silicalite-1 zeolite crystals from fumed silica at 90 degrees C under atmospheric pressure. In the synthesis, all SiO2 is transformed to the silicalite-1 and the organic template rested could be reused cyclically. Therefore, the synthesis has neither liquid wastes nor solid wastes. Hence, it may be applicable for synthesizing a wide variety of zeolites and bears the potential for low-cost, environmentally friendly and highly efficient zeolite synthesis on an industrial scale. The silicalite-1 thus obtained has a uniform spherical morphology with the crystal size of 150 nm, and a high BET surface area (466.2 m(2)/g). The silicalite-1 crystals possess single-crystalline features, mesopores within the range of 3-30 nm, and abundant silanol nests. Due to its special physical and chemical properties, the silicalite-1 exhibited high catalytic activity in the probe reaction Beckmann rearrangement of cyclohexanone oxime.