以乙二胺(EDA)还原氧化石墨烯(GO)制得一种吸附材料,即还原态氧化石墨烯(RGO)。采用批量平衡法研究了RGO对Zn(Ⅱ)的吸附动力学与热力学,利用Lagergren准一级及准二级动力学方程、Langmuir和Freundlich等温方程对实验数据进行了拟合分析...以乙二胺(EDA)还原氧化石墨烯(GO)制得一种吸附材料,即还原态氧化石墨烯(RGO)。采用批量平衡法研究了RGO对Zn(Ⅱ)的吸附动力学与热力学,利用Lagergren准一级及准二级动力学方程、Langmuir和Freundlich等温方程对实验数据进行了拟合分析。研究结果表明,Lagergren准二级吸附动力学模型能够较好地描述实验结果,表明该吸附过程以化学吸附为主。RGO的吸附在所研究的Zn(Ⅱ)浓度范围内更符合Langmuir等温吸附经验式,ΔH0=-21.60 k J/mol,吸附焓变小于零,表明该吸附为放热过程;吸附吉布斯自由能变化ΔG0为正值,表明该吸附是一个非自发的过程。展开更多
u(Ⅰ), Zn(Ⅱ), Fe(Ⅱ), Sn(Ⅱ), Pb(Ⅱ) complexes of 1,5 bis(3 nitroacetophenone) thiocarbohydrazone were synthesized by the electrochemical oxidation of anodic metal in non aqueous solvents. The complexes were characte...u(Ⅰ), Zn(Ⅱ), Fe(Ⅱ), Sn(Ⅱ), Pb(Ⅱ) complexes of 1,5 bis(3 nitroacetophenone) thiocarbohydrazone were synthesized by the electrochemical oxidation of anodic metal in non aqueous solvents. The complexes were characterized by elemental analysis, IR UV, magnetic measurement, and molar conductivity etc.展开更多
The binuclear Zn(Ⅱ) complex [Zn2(L)2(Mf)2] with 2-hydroxyacetophenone benzoylhydrazone(H2L) and monodentate N-heterocycle,morphine(Mf) has been synthesized and characterized by elemental analysis,IR,UV,molar conducti...The binuclear Zn(Ⅱ) complex [Zn2(L)2(Mf)2] with 2-hydroxyacetophenone benzoylhydrazone(H2L) and monodentate N-heterocycle,morphine(Mf) has been synthesized and characterized by elemental analysis,IR,UV,molar conductivity,TG and X-ray diffraction structural analysis.Crystal data: monoclinic,space group P21/n with a=1.263 9(6) nm,b=1.085 2(4) nm,c=1.313 4(5) nm,β=92.16(2)°,V=1.800(1) nm3,Z=2,Dc=1.493 g.cm-3,μ= 1.388 mm-1,F(000) =840,and final R =0.038 4,wR =0.087 9.The two Zn (Ⅱ) centers in the centrosymmetric binuclear complex are bridged by phenolic oxygen atoms with Zn…Zn separation of 0.315 0(1) nm.The coordina-tion geometry of each Zn(Ⅱ) atom is trigonal bipyramidal.The fluorescence activities of ligand and the complex were also studied.展开更多
文摘以乙二胺(EDA)还原氧化石墨烯(GO)制得一种吸附材料,即还原态氧化石墨烯(RGO)。采用批量平衡法研究了RGO对Zn(Ⅱ)的吸附动力学与热力学,利用Lagergren准一级及准二级动力学方程、Langmuir和Freundlich等温方程对实验数据进行了拟合分析。研究结果表明,Lagergren准二级吸附动力学模型能够较好地描述实验结果,表明该吸附过程以化学吸附为主。RGO的吸附在所研究的Zn(Ⅱ)浓度范围内更符合Langmuir等温吸附经验式,ΔH0=-21.60 k J/mol,吸附焓变小于零,表明该吸附为放热过程;吸附吉布斯自由能变化ΔG0为正值,表明该吸附是一个非自发的过程。
文摘u(Ⅰ), Zn(Ⅱ), Fe(Ⅱ), Sn(Ⅱ), Pb(Ⅱ) complexes of 1,5 bis(3 nitroacetophenone) thiocarbohydrazone were synthesized by the electrochemical oxidation of anodic metal in non aqueous solvents. The complexes were characterized by elemental analysis, IR UV, magnetic measurement, and molar conductivity etc.
文摘The binuclear Zn(Ⅱ) complex [Zn2(L)2(Mf)2] with 2-hydroxyacetophenone benzoylhydrazone(H2L) and monodentate N-heterocycle,morphine(Mf) has been synthesized and characterized by elemental analysis,IR,UV,molar conductivity,TG and X-ray diffraction structural analysis.Crystal data: monoclinic,space group P21/n with a=1.263 9(6) nm,b=1.085 2(4) nm,c=1.313 4(5) nm,β=92.16(2)°,V=1.800(1) nm3,Z=2,Dc=1.493 g.cm-3,μ= 1.388 mm-1,F(000) =840,and final R =0.038 4,wR =0.087 9.The two Zn (Ⅱ) centers in the centrosymmetric binuclear complex are bridged by phenolic oxygen atoms with Zn…Zn separation of 0.315 0(1) nm.The coordina-tion geometry of each Zn(Ⅱ) atom is trigonal bipyramidal.The fluorescence activities of ligand and the complex were also studied.
