The title compound, Sm3 (SiO4),2Cl, crystallizes in orthorhombic system, space group Pnma, with cell dimensions a= 7. 023 (2), b= 18. 022 (4), c= 6. 282(3) A, V= 795, 1(4) A3, Z=4, D.=5- 60 g/cm3, M.=670. 67, F(000) =...The title compound, Sm3 (SiO4),2Cl, crystallizes in orthorhombic system, space group Pnma, with cell dimensions a= 7. 023 (2), b= 18. 022 (4), c= 6. 282(3) A, V= 795, 1(4) A3, Z=4, D.=5- 60 g/cm3, M.=670. 67, F(000) =1180, μ= 226. 1 cm-1. The final R= 0. 069, Rw = 0. 080 for 1370 observed reflections with I≥3. 0δ(I). Independent Sm(1)O6Cl2 and Sm(2)O7Cl polyhedra are connected throughshared-edge with each other along a direction, but both linked by sharing a face O2Cl toform a three-dimensional network structure.展开更多
The title compound Gd3BSi2O10 crystallizes in orthorhombic system,space group Pbca, with dimensions of a= 9. 630(1), b= 6. 959(1), c= 22. 792(3) A,V= 1527. 4(4) A 3, Z=8, Mr= 698. 73, Dc= 6.08 g/cm3, F(000) =2440, p= ...The title compound Gd3BSi2O10 crystallizes in orthorhombic system,space group Pbca, with dimensions of a= 9. 630(1), b= 6. 959(1), c= 22. 792(3) A,V= 1527. 4(4) A 3, Z=8, Mr= 698. 73, Dc= 6.08 g/cm3, F(000) =2440, p= 262.5 cm-1, R=0. 047,,Rw=0. 053, based on 3750 with I≥3. 0 1(I) observed independent reflections. The structure contains two kinds of isolated anions: (BSi (1)O6)5- and(Si(2)O4)4- independently forming isolated sheets arranged alternately along the c axis. The Polyhedra of three crystallographically independent rare earth atoms Gd (1),Gd (2), Gd(3) are connected through edges-shared each other to form a three dimensional network structure.展开更多
Adsorbent has been widely used for the recovery and enrichment of rare metals from waste water.Herein,a graphene-based adsorbent,graphene oxide/Fe_(3)O_(4)(GO/Fe_(3)O_(4))nanocomposite,was prepared by a facile hydroth...Adsorbent has been widely used for the recovery and enrichment of rare metals from waste water.Herein,a graphene-based adsorbent,graphene oxide/Fe_(3)O_(4)(GO/Fe_(3)O_(4))nanocomposite,was prepared by a facile hydrothermal method,and characterized by X-ray diffraction,Scanning Electron Microscope,X-ray Photoelectron Spectroscopy,Zeta potential and magnetization.The material has been explored for the recovery of In from simulated waste water.The test results show that the nanocomposite has a reasonable adsorption capacity on indium in a wide pH range,e.g.,the adsorption percent and quantity of In(Ⅲ)from the aqueous solutions at pH=4 and C0=50 mg·L^(-1)are 91%and 43.98 mg·L^(-1),respectively.In addition,the nanocomposites maintain a 75.5%cycling capacity and a 71%removal efficiency after five continuous cycles due to their novel properties of high specific surface area and superparamagnetism.The pseudo-second-order adsorption model can be used to interpret the kinetic data.High adsorption efficiency and good reusability can make the nanocomposite a promising adsorbent for recovery of In(Ⅲ).展开更多
文摘The title compound, Sm3 (SiO4),2Cl, crystallizes in orthorhombic system, space group Pnma, with cell dimensions a= 7. 023 (2), b= 18. 022 (4), c= 6. 282(3) A, V= 795, 1(4) A3, Z=4, D.=5- 60 g/cm3, M.=670. 67, F(000) =1180, μ= 226. 1 cm-1. The final R= 0. 069, Rw = 0. 080 for 1370 observed reflections with I≥3. 0δ(I). Independent Sm(1)O6Cl2 and Sm(2)O7Cl polyhedra are connected throughshared-edge with each other along a direction, but both linked by sharing a face O2Cl toform a three-dimensional network structure.
文摘The title compound Gd3BSi2O10 crystallizes in orthorhombic system,space group Pbca, with dimensions of a= 9. 630(1), b= 6. 959(1), c= 22. 792(3) A,V= 1527. 4(4) A 3, Z=8, Mr= 698. 73, Dc= 6.08 g/cm3, F(000) =2440, p= 262.5 cm-1, R=0. 047,,Rw=0. 053, based on 3750 with I≥3. 0 1(I) observed independent reflections. The structure contains two kinds of isolated anions: (BSi (1)O6)5- and(Si(2)O4)4- independently forming isolated sheets arranged alternately along the c axis. The Polyhedra of three crystallographically independent rare earth atoms Gd (1),Gd (2), Gd(3) are connected through edges-shared each other to form a three dimensional network structure.
基金supported by the FJIRSM&IUE Joint Research Fund(No.RHZX-2018-006)。
文摘Adsorbent has been widely used for the recovery and enrichment of rare metals from waste water.Herein,a graphene-based adsorbent,graphene oxide/Fe_(3)O_(4)(GO/Fe_(3)O_(4))nanocomposite,was prepared by a facile hydrothermal method,and characterized by X-ray diffraction,Scanning Electron Microscope,X-ray Photoelectron Spectroscopy,Zeta potential and magnetization.The material has been explored for the recovery of In from simulated waste water.The test results show that the nanocomposite has a reasonable adsorption capacity on indium in a wide pH range,e.g.,the adsorption percent and quantity of In(Ⅲ)from the aqueous solutions at pH=4 and C0=50 mg·L^(-1)are 91%and 43.98 mg·L^(-1),respectively.In addition,the nanocomposites maintain a 75.5%cycling capacity and a 71%removal efficiency after five continuous cycles due to their novel properties of high specific surface area and superparamagnetism.The pseudo-second-order adsorption model can be used to interpret the kinetic data.High adsorption efficiency and good reusability can make the nanocomposite a promising adsorbent for recovery of In(Ⅲ).
