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
The title complex [ZnL 2Cl 2]·C 2H 5OH (M=639.70;L=2 (O chlorophenyl)benzimidazole) was prepared and characterized by elemental analysis,IR and molar conductivity measurement.The analysis of its single crystal x ...The title complex [ZnL 2Cl 2]·C 2H 5OH (M=639.70;L=2 (O chlorophenyl)benzimidazole) was prepared and characterized by elemental analysis,IR and molar conductivity measurement.The analysis of its single crystal x ray diffraction was carried out to obtain the crystal data:monoclinic,space group P2 1/n,a=1.1612(3),b=1.9339(4),c=1.3369(3)nm,β=107.88(2)°,V=2.8572(11)nm 3,Z=4,D c=1.487kg·dm -3 ,μ=1.263mm -1 ,F(OOO)=1304,the final R=0.0462,wR=0.1016,(Δ/σ) max =0.001,S=0.884.It was showed that the Zinc(Ⅱ) cation is the central ion of a distorted tetrahedral coordination with two imidazole nitrogen atoms and two chlorine ions in the tetrahedral sites.Structural changes in ligands of complex were discussed.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The title complex [ZnL 2Cl 2]·C 2H 5OH (M=639.70;L=2 (O chlorophenyl)benzimidazole) was prepared and characterized by elemental analysis,IR and molar conductivity measurement.The analysis of its single crystal x ray diffraction was carried out to obtain the crystal data:monoclinic,space group P2 1/n,a=1.1612(3),b=1.9339(4),c=1.3369(3)nm,β=107.88(2)°,V=2.8572(11)nm 3,Z=4,D c=1.487kg·dm -3 ,μ=1.263mm -1 ,F(OOO)=1304,the final R=0.0462,wR=0.1016,(Δ/σ) max =0.001,S=0.884.It was showed that the Zinc(Ⅱ) cation is the central ion of a distorted tetrahedral coordination with two imidazole nitrogen atoms and two chlorine ions in the tetrahedral sites.Structural changes in ligands of complex were discussed.
