The preparation of new covalent organic framework embedded with silver nanoparticles and its applications in degradation of organic pollutants from waste waterElectronic supplementary information (ESI) available: Digital photograph of the experimental device for the reduction of 4-NP polluted water (Fig. S1), simulated structure of TPHH-COF (Fig. S2, Tables S1 and S2), N2 adsorption isotherms of TPHH-COF treated with NaBH4 (Fig. S3), the PXRD patterns of TPHH-COF in different conditions (Fig. S4
A covalent organic framework (COF) featuring a unique light porous structure and silver nanoparticles shows high efficiency in the degradation of environmental pollutants. However, the combination of a COF with silver nanoparticles has never been reported until now. Toward this end, 2,4,6-tris-(4-fo...
Saved in:
| Main Authors | , , , , , , |
|---|---|
| Format | Journal Article |
| Published |
15.01.2019
|
| Online Access | Get full text |
Cover
Loading…
| Summary: | A covalent organic framework (COF) featuring a unique light porous structure and silver nanoparticles shows high efficiency in the degradation of environmental pollutants. However, the combination of a COF with silver nanoparticles has never been reported until now. Toward this end, 2,4,6-tris-(4-formylphenoxy)-1,3,5-triazine (TPT-CHO) and hydrazine hydrate were selected as the construction units of the COF material (TPHH-COF), which possesses rich nitrogen and oxygen sites. Then a new type of composite catalyst (Ag@TPHH-COF) was successfully obtained by solution infiltration. The obtained materials were also fully characterized by standard methods. The results showed that the silver nanoparticles (with diameters of 5 ± 3 nm) were uniformly dispersed on the surface and in the interlayer gaps of the TPHH-COF substrate. Catalytic studies showed that Ag@TPHH-COF could catalyze the reduction of the various nitroaromatic compounds (NACs) with high efficiency, such as 4-nitrophenol, 2-nitrophenol, 4-nitroaniline, nitrobenzene, 4-nitrotoluene and 1-butyl-4-nitrobenzene. Ag@TPHH-COF could also catalyze the reduction of organic dyes such as Rhodamine B (RhB), Methylene Blue (MB), Methyl Orange (MO) and Congo Red (CR). Moreover, Ag@TPHH-COF has good reusability and high recovery.
Ag@TPHH-COF can be used as efficient catalyst for the reduction of the various nitroaromatic compounds and organic dyes in industrial wastewater. |
|---|---|
| Bibliography: | reaction time for the reduction of NACs and dyes(Fig. S8 and S9), leaching test (Fig. S10) C ) (Fig. S3), the PXRD patterns of TPHH-COF in different conditions (Fig. S4 and S5), the TGA curves (Fig. S5), the UV-vis absorption spectra and the plot of ln versus / 0 1 2 4 t 10.1039/c8dt04458a adsorption isotherms of TPHH-COF treated with NaBH Electronic supplementary information (ESI) available: Digital photograph of the experimental device for the reduction of 4-NP polluted water (Fig. S1), simulated structure of TPHH-COF (Fig. S2, Tables S1 and S2), N HNMR spectrum (Fig. S12). See DOI |
| ISSN: | 1477-9226 1477-9234 |
| DOI: | 10.1039/c8dt04458a |