摘要
随着清洁燃料的需求量迅速增加,探索高效的催化剂成为研究的热点。采用静电纺丝技术结合溶剂热法制备了NH2-MIL-125(Ti)/TiO2复合纳米纤维。通过XRD、FT-IR、SEM等测试表征了复合纳米纤维的结构和形貌。NH2-MIL-125(Ti)/TiO2复合纳米纤维是由NH2-MIL-125(Ti)和混相TiO2(金红石相和锐钛矿相)构成,复合纳米纤维直径大约为220nm。将该复合纳米纤维用于燃油脱硫性能研究,探索了不同催化剂、NH2-MIL-125(Ti)的负载量、催化剂用量、反应温度等脱硫影响因素。结果发现,在萃取催化氧化脱硫体系中,在60℃下,使用31μLH2O2(氧硫比为6∶1)时,0.02g0.30NH2-MIL-125(Ti)/1.25TiO2复合纳米纤维作为催化剂,可以在40min内将浓度为500ppm的模拟油中的DBT完全除去。NH2-MIL-125(Ti)/TiO2纳米纤维至少能够重复使用3次,且脱硫效率没有明显的降低,为此类纳米材料的工业应用提供了实验依据。
With the rapid of demand for clean fuels,exploring efficient catalysts becomes a research hotspot.A series of NH2-MIL-125(Ti)/TiO2 composited nanofibers were prepared by combining with electrospinning and hydrothermal method.The structures and morphologies of these composited nanofibers are characterized by XRD,FT-IR and SEM.The results indicated that NH2-MIL-125(Ti)/TiO2 composited nanofibers are composed of NH2-MIL-125(Ti)and TiO2 mixture crystal(anatase and rutile).The diameter of composited nanofibers is about 220 nm.The series of NH2-MIL-125(Ti)/TiO2 composited nanofibers were applied in desulfurization performance of fuel oil.The factors affecting desulfurizative efficiencies were researched,such as the different catalysts,the loading amount of NH2-MIL-125(Ti),the dosage of catalysts,the temperature of reaction,and so on.The results indicated that DBT could be removed completely using 0.02 g 0.30NH2-MIL-125(Ti)/1.25TiO2 composited nanofibers as catalysts within 40 min in extraction catalysis oxidative desulfurization system at 60℃ when the ratio of H2O2 is fixed 31μL.NH2-MIL-125(Ti)/TiO2 composited nanofibers can be reused at least 3 times without significant reduction of desulfurization efficiency.It provides the experimental basis for the industrial application of this kind of nanomaterials.
作者
马雯雯
马原雅
赵震
MA Wenwen;MA Yuanya;ZHAO Zhen(College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China;Insititute of Catalysis for Energy and Environment,Shenyang Normal University,Shenyang 110034,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China)
出处
《沈阳师范大学学报（自然科学版）》
CAS
2020年第2期125-131,共7页
Journal of Shenyang Normal University:Natural Science Edition
基金
国家自然科学基金重大研究计划资助项目(91845201)
辽宁省教育厅高校青年科研项目(LQN201719)
辽宁省科技厅博士科研启动基金项目(2019-BS-215)。
关键词
复合纳米纤维
静电纺丝
脱硫
二氧化钛
金属-有机框架材料
compound nanofibers
electrospinning
desulfurization
TiO2
metal-organic frameworks materials
