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H5PV2Mo10O40 encapsulated into Cu3(BTC)2 as an efficient heterogeneous nanocrystalline catalyst for styrene epoxidation
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-09-12 , DOI: 10.1039/d0nj03473h Qian Yue 1, 2, 3, 4, 5 , Ying Lu 1, 2, 3, 4, 5 , Zhong Zhang 1, 2, 3, 4, 5 , Hongrui Tian 1, 2, 3, 4, 5 , Henan Wang 1, 2, 3, 4, 5 , Xiaohui Li 1, 2, 3, 4, 5 , Shuxia Liu 1, 2, 3, 4, 5
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-09-12 , DOI: 10.1039/d0nj03473h Qian Yue 1, 2, 3, 4, 5 , Ying Lu 1, 2, 3, 4, 5 , Zhong Zhang 1, 2, 3, 4, 5 , Hongrui Tian 1, 2, 3, 4, 5 , Henan Wang 1, 2, 3, 4, 5 , Xiaohui Li 1, 2, 3, 4, 5 , Shuxia Liu 1, 2, 3, 4, 5
Affiliation
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The Keggin-type polyoxometalate H5PV2Mo10O40 (HPMoV) was encapsulated into the Cu3(BTC)2 framework (H3BTC = 1,3,5-benzenetricarboxylic acid) via a liquid-assisted grinding (LAG) method to obtain nanocrystalline POM@MOF, i.e. NENU-9N, formulated as [Cu12(BTC)8(H2O)12][H5PV2Mo10O40]. The NENU-9N was characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), thermal gravimetric analysis (TGA) and nitrogen adsorption–desorption analysis, indicating that NENU-9N has good crystallinity, excellent thermal stability, permanent porosity, and uniform particle size (about 70 nm). The catalytic performance of NENU-9N as a heterogeneous catalyst for the epoxidation of styrene using oxygen as the oxidant was studied. As a result, NENU-9N showed excellent catalytic performance (97.2% styrene conversion with 93.5% selectivity to styrene oxide) which can be attributed to the synergistic catalysis between Cu3(BTC)2 and HPMoV. The nanocrystalline catalyst had good stability and recyclability which can be recycled at least 5 times with no significant loss of catalytic activity. Furthermore, the catalytic mechanism of NENU-9N on the aerobic epoxidation of styrene was investigated by radical quenching experiments.
中文翻译：
H5PV2Mo10O40封装在Cu3（BTC）2中作为苯乙烯环氧化的高效多相纳米晶催化剂
经由液体辅助研磨（LAG）将Keggin型多金属氧酸盐H 5 PV 2 Mo 10 O 40（HPMoV）封装到Cu 3（BTC）2骨架中（H 3 BTC = 1,3,5-苯三甲酸）。制备[Cu 12（BTC）8（H 2 O）12 ] [H 5 PV 2 Mo 10 O 40的纳米晶POM @ MOF，即NENU-9N的方法]。NENU-9N的特征在于粉末X射线衍射（XRD），傅立叶变换红外（FT-IR）光谱，扫描电子显微镜（SEM），热重分析（TGA）和氮吸附-解吸分析，表明NENU-9N 9N具有良好的结晶度，出色的热稳定性，永久孔隙率和均匀的粒径（约70 nm）。研究了NENU-9N作为非均相催化剂在氧气为氧化剂的条件下对苯乙烯进行环氧化的催化性能。结果，NENU-9N表现出出色的催化性能（97.2％的苯乙烯转化率和93.5％的氧化苯乙烯选择性），这可归因于Cu 3（BTC）2之间的协同催化作用。和HPMoV。该纳米晶催化剂具有良好的稳定性和可循环性，其可以循环至少5次而没有明显的催化活性损失。此外，通过自由基猝灭实验研究了NENU-9N对苯乙烯的好氧环氧化的催化机理。
更新日期：2020-10-15
中文翻译：
H5PV2Mo10O40封装在Cu3（BTC）2中作为苯乙烯环氧化的高效多相纳米晶催化剂
经由液体辅助研磨（LAG）将Keggin型多金属氧酸盐H 5 PV 2 Mo 10 O 40（HPMoV）封装到Cu 3（BTC）2骨架中（H 3 BTC = 1,3,5-苯三甲酸）。制备[Cu 12（BTC）8（H 2 O）12 ] [H 5 PV 2 Mo 10 O 40的纳米晶POM @ MOF，即NENU-9N的方法]。NENU-9N的特征在于粉末X射线衍射（XRD），傅立叶变换红外（FT-IR）光谱，扫描电子显微镜（SEM），热重分析（TGA）和氮吸附-解吸分析，表明NENU-9N 9N具有良好的结晶度，出色的热稳定性，永久孔隙率和均匀的粒径（约70 nm）。研究了NENU-9N作为非均相催化剂在氧气为氧化剂的条件下对苯乙烯进行环氧化的催化性能。结果，NENU-9N表现出出色的催化性能（97.2％的苯乙烯转化率和93.5％的氧化苯乙烯选择性），这可归因于Cu 3（BTC）2之间的协同催化作用。和HPMoV。该纳米晶催化剂具有良好的稳定性和可循环性，其可以循环至少5次而没有明显的催化活性损失。此外，通过自由基猝灭实验研究了NENU-9N对苯乙烯的好氧环氧化的催化机理。
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