Considering the different geochemical enrichment behaviors of W and Mo,Fe?Mn binary oxide(FMBO),ferric hydroxide(Fe(OH)3)and manganese dioxide(MnO2)were studied to separate W from molybdate solution,respectively.The e...Considering the different geochemical enrichment behaviors of W and Mo,Fe?Mn binary oxide(FMBO),ferric hydroxide(Fe(OH)3)and manganese dioxide(MnO2)were studied to separate W from molybdate solution,respectively.The experimental results demonstrated that Fe?Mn binary oxide(FMBO)was the most suitable adsorbent for the separation.Under a wide pH(6.9?11.3)region,more than80%W removal efficiency and less than3%Mo loss could be obtained.In addition,the Fe?Mn binary oxide adsorbent can be regenerated by treating with3mol/L NaOH,and the W adsorption efficiency was retained after five adsorption?desorption?regeneration cycles.All these indicate that the Fe?Mn binary oxides have the potential for the separation of W from molybdate solution.展开更多
在不同锰源条件下,通过一个四元体系(CTAB/水/戊烷/戊醇)微乳液法合成了Mn Mo O_4·XH_2O(X=0.9,1.5)。XRD和热重分析证明:当锰源是Mn Cl_2·_4H_2O时,能够合成出Mn Mo O_4·0.9H_2O,当锰源为C4H6Mn O_4·_4H_2O时,产物...在不同锰源条件下,通过一个四元体系(CTAB/水/戊烷/戊醇)微乳液法合成了Mn Mo O_4·XH_2O(X=0.9,1.5)。XRD和热重分析证明:当锰源是Mn Cl_2·_4H_2O时,能够合成出Mn Mo O_4·0.9H_2O,当锰源为C4H6Mn O_4·_4H_2O时,产物为Mn Mo O_4·1.5H_2O。ω(CTAB/水的摩尔比)和不同锰源对最终产物结构有很大影响。通过固体紫外吸收光谱图可以计算出Mn Mo O_4·0.9H_2O的带隙能达到3.08 e V,Mn Mo O_4·1.5H_2O的带隙能是3.04 e V。展开更多
A polyoxometalate-based complex [Mn(DMSO)5H2O]2SiMo12O40 has been synthe- sized and it crystallizes in triclinic, space group P with a = 11.863(2), b = 12.750(3), c = 13.255(3) , a = 83.62(3), b = 69.46(3), g = 87.14(...A polyoxometalate-based complex [Mn(DMSO)5H2O]2SiMo12O40 has been synthe- sized and it crystallizes in triclinic, space group P with a = 11.863(2), b = 12.750(3), c = 13.255(3) , a = 83.62(3), b = 69.46(3), g = 87.14(3), V = 1865.6(6) 3, Dc = 2.445 g/cm3, Z = 1, ?= 2.660 mm-1, Mr = 2746.56, F(000) = 1328, R = 0.0569, wR = 0.1190 and GOF = 1.125. The results of X-ray crystal analysis and IR spectrum show that there exists strong interaction between the heteropolyanions [SiMo12O40]4- and coordination cations [Mn(DMSO)5H2O]2+ in solid state.展开更多
基金Projects(51334008,51304243,51604160)supported by the National Natural Science Foundation of ChinaProject(2016zzts037)supported by the Fundamental Research Funds for the Central Universities,China
文摘Considering the different geochemical enrichment behaviors of W and Mo,Fe?Mn binary oxide(FMBO),ferric hydroxide(Fe(OH)3)and manganese dioxide(MnO2)were studied to separate W from molybdate solution,respectively.The experimental results demonstrated that Fe?Mn binary oxide(FMBO)was the most suitable adsorbent for the separation.Under a wide pH(6.9?11.3)region,more than80%W removal efficiency and less than3%Mo loss could be obtained.In addition,the Fe?Mn binary oxide adsorbent can be regenerated by treating with3mol/L NaOH,and the W adsorption efficiency was retained after five adsorption?desorption?regeneration cycles.All these indicate that the Fe?Mn binary oxides have the potential for the separation of W from molybdate solution.
基金National Natural Science Foundation of China(21201004)
文摘在不同锰源条件下,通过一个四元体系(CTAB/水/戊烷/戊醇)微乳液法合成了Mn Mo O_4·XH_2O(X=0.9,1.5)。XRD和热重分析证明:当锰源是Mn Cl_2·_4H_2O时,能够合成出Mn Mo O_4·0.9H_2O,当锰源为C4H6Mn O_4·_4H_2O时,产物为Mn Mo O_4·1.5H_2O。ω(CTAB/水的摩尔比)和不同锰源对最终产物结构有很大影响。通过固体紫外吸收光谱图可以计算出Mn Mo O_4·0.9H_2O的带隙能达到3.08 e V,Mn Mo O_4·1.5H_2O的带隙能是3.04 e V。
基金The project was supported by the Natural Science Foundation of Henan Province (NO. 004040300) and the Outstanding Youth Foundation of Henan Province (NO. 004031800)
文摘A polyoxometalate-based complex [Mn(DMSO)5H2O]2SiMo12O40 has been synthe- sized and it crystallizes in triclinic, space group P with a = 11.863(2), b = 12.750(3), c = 13.255(3) , a = 83.62(3), b = 69.46(3), g = 87.14(3), V = 1865.6(6) 3, Dc = 2.445 g/cm3, Z = 1, ?= 2.660 mm-1, Mr = 2746.56, F(000) = 1328, R = 0.0569, wR = 0.1190 and GOF = 1.125. The results of X-ray crystal analysis and IR spectrum show that there exists strong interaction between the heteropolyanions [SiMo12O40]4- and coordination cations [Mn(DMSO)5H2O]2+ in solid state.
