The Eu^3＋ activated Lu2MoO6 phosphors were synthesized by high-temperature solid-state reaction method. The X-ray diffraction （XRD）, excitation spectra, emission spectra and decay lifetime of the phosphors were me...The Eu^3＋ activated Lu2MoO6 phosphors were synthesized by high-temperature solid-state reaction method. The X-ray diffraction （XRD）, excitation spectra, emission spectra and decay lifetime of the phosphors were measured to characterize the structure and luminescent properties. The XRD results show that all the prepared phosphors can be assigned to the monoclinic structure. The experimental results indicate efficient absorption of near ultraviolet light from the Mo^6＋O^2- group followed by intensive emission in the visible spectral range. The optimal content of Eu3＋ is 10% （mole fraction）. The critical distance Rc and energy transfer mechanism were also discussed in detail. This red emitting material may be applied as a promising red phosphor for the near ultraviolet excited white light emitting diodes.展开更多
采用水热法合成了具有很好催化性能的Bi_2MoO_6催化剂,并利用XRD、FT-IR、SEM和EDS等分析技术对其结构和形貌进行表征。以Bi_2MoO_6为催化剂,1-丁基-3-甲基咪唑盐酸盐([BMIM]Cl)离子液体为萃取剂,H_2O_2为氧化剂氧化脱除模拟油中的二苯...采用水热法合成了具有很好催化性能的Bi_2MoO_6催化剂,并利用XRD、FT-IR、SEM和EDS等分析技术对其结构和形貌进行表征。以Bi_2MoO_6为催化剂,1-丁基-3-甲基咪唑盐酸盐([BMIM]Cl)离子液体为萃取剂,H_2O_2为氧化剂氧化脱除模拟油中的二苯并噻吩(BDT)。考察了反应温度,氧化剂、离子液体和催化剂使用量,不同种类的含硫化合物以及催化剂稳定性等因素对脱硫效果的影响。在V(oil)=5 m L,V(H_2O_2)=0.2 m L,V([BMIM]Cl)=1.0 m L,m(Bi_2MoO_6)=0.02 g,T=60℃的最佳操作条件下,模拟油中的DBT的脱除率可达到94.58%。催化剂重复使用5次活性无明显下降。同时,详细地研究了该催化氧化反应的反应机理。展开更多
基金supported by the National Natural Science Foundation of China(21407059,61308095)Science Development Project of Jilin Province,China(20130522071JH,20130102004JC,20140101160JC)~~
基金Project(11404047)supported by the National Natural Science Foundation of ChinaProjects(CSTC2015jcyj A50005,CSTC2014JCYJA50034)supported by the Natural Science Foundation Project of Chongqing,ChinaProject(KJ1500412,KJ1500409)supported by Scientific and Technological Research Program of Chongqing Municipal Education Commission,China
文摘The Eu^3＋ activated Lu2MoO6 phosphors were synthesized by high-temperature solid-state reaction method. The X-ray diffraction （XRD）, excitation spectra, emission spectra and decay lifetime of the phosphors were measured to characterize the structure and luminescent properties. The XRD results show that all the prepared phosphors can be assigned to the monoclinic structure. The experimental results indicate efficient absorption of near ultraviolet light from the Mo^6＋O^2- group followed by intensive emission in the visible spectral range. The optimal content of Eu3＋ is 10% （mole fraction）. The critical distance Rc and energy transfer mechanism were also discussed in detail. This red emitting material may be applied as a promising red phosphor for the near ultraviolet excited white light emitting diodes.
文摘采用水热法合成了具有很好催化性能的Bi_2MoO_6催化剂,并利用XRD、FT-IR、SEM和EDS等分析技术对其结构和形貌进行表征。以Bi_2MoO_6为催化剂,1-丁基-3-甲基咪唑盐酸盐([BMIM]Cl)离子液体为萃取剂,H_2O_2为氧化剂氧化脱除模拟油中的二苯并噻吩(BDT)。考察了反应温度,氧化剂、离子液体和催化剂使用量,不同种类的含硫化合物以及催化剂稳定性等因素对脱硫效果的影响。在V(oil)=5 m L,V(H_2O_2)=0.2 m L,V([BMIM]Cl)=1.0 m L,m(Bi_2MoO_6)=0.02 g,T=60℃的最佳操作条件下,模拟油中的DBT的脱除率可达到94.58%。催化剂重复使用5次活性无明显下降。同时,详细地研究了该催化氧化反应的反应机理。
