Gao Yan, Cheng Liangting, Gao Ruimin, Hu Guangfa, Zhao Jianshe
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an, 710069, China.
Research Institute of Shaanxi Yanchang Petroleum Group Corp. Ltd., Xi'an, 710075, China.
J Hazard Mater. 2021 Jan 5;401:123267. doi: 10.1016/j.jhazmat.2020.123267. Epub 2020 Jun 22.
In this work, polyoxometalates-based monomer ionic liquid, dimer ionic liquid and polyionic liquid were designed and prepared. Then supported catalysts were synthesized by loading polyoxometalate derivatives on the surface of graphene oxide (GO). The catalysts before and after loading were characterized via many tests such as scanning electron microscope (SEM), infrared spectroscopy (IR), X-ray powder diffraction (XRD) and so on. The influences of ionic liquid type and carrier on desulfurization activity were carried out. The result shows that supported catalyst-based polyionic liquid (P[Vim]POM/GO) performed high activity and excellent recyclability in extraction-oxidation desulfurization (EODS) due to unique state of polyoxometalate and the support of graphene oxide. In addition, the possible mechanism of oxidation dibenzothiophene (DBT) with HO was proposed according to the kinetic study and gas chromatography-mass spectrometer (GC-MS) result.
在本工作中，设计并制备了基于多金属氧酸盐的单体离子液体、二聚体离子液体和聚离子液体。然后通过将多金属氧酸盐衍生物负载在氧化石墨烯（GO）表面合成了负载型催化剂。通过扫描电子显微镜（SEM）、红外光谱（IR）、X射线粉末衍射（XRD）等多种测试手段对负载前后的催化剂进行了表征。研究了离子液体类型和载体对脱硫活性的影响。结果表明，基于聚离子液体的负载型催化剂（P[Vim]POM/GO）由于多金属氧酸盐的独特状态和氧化石墨烯的载体作用，在萃取氧化脱硫（EODS）中表现出高活性和优异的可循环性。此外，根据动力学研究和气相色谱-质谱联用仪（GC-MS）结果，提出了用HO氧化二苯并噻吩（DBT）的可能机理。
