Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (11): 2015.doi: 10.7503/cjcu20170159
• Physical Chemistry • Previous Articles Next Articles
Received:
2017-03-20
Online:
2017-11-10
Published:
2017-09-30
Contact:
HU Jiawen
E-mail:jwhu@hnu.edu.cn
Supported by:
CLC Number:
TrendMD:
SHEN Xiaohua, HU Jiawen. Synthesis of Polystyrene/silver Nanoparticels Composite Spheres and Their Catalytical Application†[J]. Chem. J. Chinese Universities, 2017, 38(11): 2015.
Fig.4 TEM images(A—D) for the PS/Ag NPs composite spheres prepared from 0.29 mol/L(A, A'), 0.58 mol/L(B, B'), 0.87 mol/L(C, C') and 1.16 mol/L(D, D') [Ag(NH3)2]+ solutions and corresponding size distributions(A'—D') of Ag NPs on the PS spheres
Fig.5 XRD patterns(A) for PS spheres(a), PS/Ag NPs composite spheres(b) and standard pattern for Ag(c) and UV-Vis spectra(B) of PS/Ag NPs composite crospheres prepared from 0.29 mol/L(a), 0.58 mol/L(b), 0.87 mol/L(c) and 1.16 mol/L(d) [Ag(NH3)2]+ solutions
Fig.6 Schematic showing the reduction mechanism of MB on the PS/Ag NPs composite spheres(A) and time-dependent UV-Vis spectra for MB solution(0.04 mmol/L) without catalyst(B) and in the presence of sulfonated PS spheres(C) and pure Ag NPs(D)
Fig.7 Time-dependent UV-Vis spectra for MB solution(0.04 mmol/L) in the presence of PS/Ag NPs composite spheres prepared from 0.29(A), 0.58(B), 0.87(C) and 1.16 mol/L(D) [Ag(NH3)2]+ solutions
Fig.8 Conversion efficiency of MB solution with different initial concentration in the presence of PS/Ag NPs composite(1.1 mg, prepared from 1.16 mol/L [Ag(NH3)2]+ solution)
Material | Temperature/℃ | Ag NPs diameter/nm | k/(s-1·mg-1) | Ref. |
---|---|---|---|---|
Poly(S-co-HEA)/Ag NPs | r. t. | 23.0 | 6.60×10-4 | [ |
Fe3O4@polydopamine-Ag microspheres | 25 | 25.0 | 1.43×10-3 | [ |
Ag NPs on Fe3O4@C nanocomposites | 25 | 10.0 | 5.67×10-4 | [ |
LCPS/Ag NPs | 25 | 40.0 | 1.62×10-3 | [ |
P(St-NaSS)/Ag NPs | 25 | 19.2 | 2.60×10-3 | [ |
PS/Ag NPs composite spheres | 25 | 18.5 | 2.42×10-3 | This work |
Table 1 Comparison of normalized kinetic constant of different catalysts used for the conversion of MB
Material | Temperature/℃ | Ag NPs diameter/nm | k/(s-1·mg-1) | Ref. |
---|---|---|---|---|
Poly(S-co-HEA)/Ag NPs | r. t. | 23.0 | 6.60×10-4 | [ |
Fe3O4@polydopamine-Ag microspheres | 25 | 25.0 | 1.43×10-3 | [ |
Ag NPs on Fe3O4@C nanocomposites | 25 | 10.0 | 5.67×10-4 | [ |
LCPS/Ag NPs | 25 | 40.0 | 1.62×10-3 | [ |
P(St-NaSS)/Ag NPs | 25 | 19.2 | 2.60×10-3 | [ |
PS/Ag NPs composite spheres | 25 | 18.5 | 2.42×10-3 | This work |
Fig.10 Covertic degradation kinetics for MB solution in five cycles with the presence of PS/Ag NPs composite spheres(prepared from 1.16 mol/L [Ag(NH3)2]+ solution)(A) and absorbance intensity variation for each cycle(B)
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