Co(En)\-3MoO\-4 was synthesized by using the method of hydrothermal synthesis and characterized by elemental analysis, IR, ESR and single\|crystal X\|ray methods. It crystallizes in hexagonal space group \%P3C1\% with...Co(En)\-3MoO\-4 was synthesized by using the method of hydrothermal synthesis and characterized by elemental analysis, IR, ESR and single\|crystal X\|ray methods. It crystallizes in hexagonal space group \%P3C1\% with \{\%a\%=1\^596 4(2) nm\}, \{\%b\%=1\^596 4(2) nm\}, \%c\%=\{0\^993 5(2)\} nm, \%α=β\%=90°, \%γ\%=120°, \%M\%\-c=399\^18, \%V\%=2\^192 6(6) nm\+3, \%D\%\-c=1\^814 g/nm\+3, \%Z\%=6, \%F\%(000)=1 218, \%R\%\-1=0\^070 3, \%R\%\-w=0\^220 7. According to separation of anion which acted on electrostatic potential, the anion and cation ions formed a type of organic and inorganic material.展开更多
In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and...In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and MoO 3 TiO 2.The results showed that SO 2- 4 MoO 3 TiO 2 had better catalytic performance than SO 2- 4 TiO 2 and MoO 3 TiO 2.There was evident coordination between MoO 3 and SO 2- 4 when they coexisted on TiO 2.展开更多
文摘Co(En)\-3MoO\-4 was synthesized by using the method of hydrothermal synthesis and characterized by elemental analysis, IR, ESR and single\|crystal X\|ray methods. It crystallizes in hexagonal space group \%P3C1\% with \{\%a\%=1\^596 4(2) nm\}, \{\%b\%=1\^596 4(2) nm\}, \%c\%=\{0\^993 5(2)\} nm, \%α=β\%=90°, \%γ\%=120°, \%M\%\-c=399\^18, \%V\%=2\^192 6(6) nm\+3, \%D\%\-c=1\^814 g/nm\+3, \%Z\%=6, \%F\%(000)=1 218, \%R\%\-1=0\^070 3, \%R\%\-w=0\^220 7. According to separation of anion which acted on electrostatic potential, the anion and cation ions formed a type of organic and inorganic material.
文摘In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and MoO 3 TiO 2.The results showed that SO 2- 4 MoO 3 TiO 2 had better catalytic performance than SO 2- 4 TiO 2 and MoO 3 TiO 2.There was evident coordination between MoO 3 and SO 2- 4 when they coexisted on TiO 2.
文摘采用高温固相法制备了KLa(Mo O4)2∶Sm3+红色荧光粉,利用X射线衍射对晶体结构进行表征,发现不同浓度Sm3+掺杂的样品均为单斜相结构。测量了样品的激发和发射光谱,观察到样品在紫外区及可见蓝绿区均有强的激发带,在404 nm激发下存在4个发射峰。测量了不同温度下样品的发射光谱和荧光衰减曲线,对样品的荧光温度猝灭进行了分析,确定了样品发光的温度猝灭是由横向穿越所导致的,采用Arrhennius模型对实验数据进行拟合,确定激活能约为0.48 e V,表明荧光粉具有良好的热稳定性。
