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Highly Dispersed DPPF Locked in Knitting Hyper‐Crosslinked Polymers as Efficient and Recyclable Catalyst
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-06-04 , DOI: 10.1002/slct.201800610
Cheng Tang 1 , Zhijuan Zou 1 , Yufang Fu 1 , Kunpeng Song 1
Affiliation  

In this study, a novel catalytic system based on the hyper‐cross‐linked 1,1′‐Bis (diphenylphosphino) ferrocene (HCP‐DPPF) is prepared for effectively removing Cr (VI) from water. Transmission Electron Microscope (TEM), Scanning Electron Microscope (SEM) and X‐ray Photoelectron Spectroscopy (XPS) were employed for the characterization of the catalyst. The surface area of HCP‐DPPF can reach 349.7 m2g−1 and the SEM mapping shows that Fe has a good dispersion on the surface of polymer materials. The resulting HCP‐DPPF exhibited remarkable catalytic activity and excellent durability for the Cr (VI) removal and reduction of 4‐nitrophenol (4‐NP) to 4‐aminophenol (4‐AP) in an aqueous solution. It could reach nearly 100% conversions within several minutes, even when the amount of the catalyst was used as low as 3 mg. Moreover, the HCP‐DPPF can be reused 14 times and still retain high conversion efficiency over 92%. The results illustrate in situ immobilization of DPPF onto hyper‐cross‐linked polymers which improve the stability and electron transfer of the catalyst, while enhancing the activity of HCP‐DPPF toward Cr (VI) removal and reduction of 4‐NP.

中文翻译:

高度分散的DPPF锁定在编织超交联聚合物中作为高效和可回收的催化剂

在这项研究中,基于超交联的1,1'-双(二苯基膦基)二茂铁(HCP-DPPF)的新型催化体系被制备出来,可以有效地去除水中的Cr(VI)。透射电子显微镜(TEM),扫描电子显微镜(SEM)和X射线光电子能谱(XPS)用于表征催化剂。HCP-DPPF的表面积可达到349.7 m 2 g -1SEM图表明,Fe在聚合物材料表面具有良好的分散性。所得的HCP-DPPF在水溶液中可去除Cr(VI)并将4-硝基苯酚(4-NP)还原为4-氨基苯酚(4-AP)表现出卓越的催化活性和出色的耐久性。即使使用的催化剂量低至3 mg,也可以在数分钟内达到近100%的转化率。此外,HCP-DPPF可以重复使用14次,仍可保持92%以上的高转换效率。结果表明将DPPF原位固定在超交联聚合物上可提高催化剂的稳定性和电子转移,同时增强HCP-DPPF去除Cr(VI)和还原4-NP的活性。
更新日期:2018-06-04
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