田福平

个人信息Personal Information

副教授

硕士生导师

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:化学学院

学科:物理化学. 化学工艺

办公地点:主校区化学楼225房间

联系方式:0411-84708901

电子邮箱:fptian@dlut.edu.cn

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High pH promoting the synthesis of V-Silicalite-1 with high vanadium content in the framework and its catalytic performance in selective oxidation of styrene

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论文类型:期刊论文

发表时间:2018-09-07

发表刊物:DALTON TRANSACTIONS

收录刊物:SCIE

卷号:47

期号:33

页面范围:11375-11385

ISSN号:1477-9226

摘要:It is difficult to synthesize a Silicalite-1 molecular sieve with a high vanadium content in the framework, because heteroatoms significantly affect the formation of V-Silicalite-1. Here, V-Silicalite-1 with a high vanadium content in the framework of the molecular sieve was successfully synthesized by controlling the pH at high levels. In the process of hydrothermal synthesis, OH- ions effectively promoted the entry of vanadium atoms into the framework of the molecular sieve. Samples of V-Silicalite-1 with different vanadium contents were characterized by XRD, FTIR, UV-vis, XPS, EPR, ICP, FE-SEM, elemental mapping, N-2 adsorption-desorption, and TPR, which confirmed that vanadium atoms successfully replaced silicon atoms in the framework. V-Silicalite-1 exhibited good catalytic performance in the selective oxidation of styrene at different temperatures, with a styrene conversion of up to 84.89% and a selectivity of 91.04% for styrene oxide at 25 degrees C and a styrene conversion of 97.47% and a selectivity of 80.97% for benzaldehyde at 85 degrees C. This study provided a new idea for the synthesis of molecular sieves with high vanadium contents in the framework. Besides, it also enabled the direct application of vanadium-doped molecular sieves for the catalytic oxidation of styrene in industry.