Preparation of carbonized MOF/MgCl 2 hybrid products as dye adsorbent and supercapacitor: Morphology evolution and Mg salt effect

Transcription

1 Preparation of carbonized MOF/MgCl 2 hybrid products as dye adsorbent and supercapacitor: Morphology evolution and Mg salt effect Ting Li, Shuai Ma, Hu Yang*, Zhen-liang Xu Membrane Research Center, Chemical Engineering Research Institute, East China University of Science and Technology, Shanghai , PR China. Table of content N 2 adsorption/desorption (a) and pore size distribution curves (b) of Mg-MOF, figure S1 TGA curves of Mg-MOFs prepared without inducer, figure S2 Enlarged images of carbonized MOFs, figure S3 SAED of carbonized Mg-MOF products, figure S4, TEM of carbonized Mg-MOF products after second washing, figure S5 Selective adsorption of MO and MB (1:1) by C-II and C-III, figure S6 Molecular structure of MO and MB, figure S7. CV curves of different electrodes (a.b,c) at various scan rates within a potential range of -0.8 to 0 V (vs. Hg/HgO) in 6 mol/l KOH aqueous solution, Figure S8 Table S1 Chemical composition of carbonized Mg-MOFs determined from XPS measurement. Table S2. Summary of the Langmuir and Freundlich Isotherm fitting parameters for the adsorption of MO and MB onto carbonized products. Table S3 Experimental and calculated parameters of the kinetic models,measured at 200ppm. Table S4 Comparison of the Maximum Adsorption of MO onto Various Adsorbents. * Corresponding author. Tel: hyang@ecust.edu.cn,(hu yang)

2 Figure S1 Mg-MOF N2 adsorption/desorption (a) and pore size distribution curves (b) of of

3 Figure S2 TGA curves of Mg-MOFs prepared without PET inducer

4 Figure S3 enlarged images of carbonized MOFs.

5 Figure S4, SAED of carbonized Mg-MOF products.

6 Figure S5. TEM of carbonized Mg-MOF products after second washing

7 Figure S6. selective adsorption of MO and MB (1:1) by C-II and C-III.

8 Figure S7. Molecular structure of MO and MB.

9 Figure S8. CV curves of different electrodes (a.b,c) at various scan rates within a potential range of -0.8 to 0 V (vs. Hg/HgO) in 6 mol/l KOH aqueous solution.

10 Table S1 Chemical composition of carbonized Mg-MOFs determined from XPS measurement. Element (atom %) C-II C-III C-II/2 C-III/2 CP-II CP-III C O Mg Cl Table S2. Summary of the Langmuir and Freundlich Isotherm fitting parameters for the adsorption of MO and MB onto carbonized products. Dye Sample q EXP Langmuir adsorption Freundlich isotherm (mg/g) q max (mg/g) b (L/mg) R 2 KF n R 2 MO C-II C-III CP-II CP-III MB C-II C-III CP-II

11 CP-III

12 Table S3 Experimental and calculated parameters of the kinetic models,measured at 200ppm. Pseudo-second-order (MO) Pseudo-second-order (MB) Sample qe(exp) qe(cal) k2 R 2 qe(exp) qe(cal) k2 R 2 (mg/g) (mg/g) (g/(mg.hr)) (mg/g) (mg/g) (g/(mg.hr)) C-II C-III CP-II CP-III

13 Table S4 Comparison of the Maximum Adsorption of MO onto Various Adsorbents Adsorbent BET P ave q e (or q m ) b Condition Ref (m 2 /g) size a (nm) (mg/g) (Temp/pH/C 0 ) Fe 3 O 4 /Al 2 O 3 /chitosan composite q m = k/pH=6 C 0 =800ppm 50 N-doped nanoporous carbon q m = k/pH=7 c C 0 =750ppm 51 Activated carbon derived from finger citron residue q e = K/pH=7 C 0 =450ppm 52 MnO 2 graphene CNT q m = K/pH=3 53 C 0 =300ppm Magnetic porous carbon spheres q m = K/pH=7 C 0 =300ppm 54 Proton-containing δ-mno q e = K/pH=7 55 C 0 =600ppm Carbon-stabilized Fe/Fe 3 C nanoparticles q m = K/ ph =6.5 C0=150ppm 56 ZnAl-LDH/Al (OH) q m = k/pH=7 57 C 0 =500ppm Carbonization pomelo peel q m =680 ph= and KOH activation.

14 q e =628 C 0 =300 ppm Calcined glycerol-modify Mg/Al layered hydroxides q m = K/pH=4.5 C 0 =30ppm 59 Plasma modification of q m = K/pH=4 60 ZnMgAl-LDHs q e =980 C 0 =200ppm C-III q e =3250 C-II q e = K/pH=7 C 0 =800ppm This study a: P ave, average pore size, b:q e, measured adsorption data, q m, calculated by langmuir model, c: ph=7, the solution ph is used as the natural without adjusting.