Solar-driven photodegradation of 17-β-estradiol and ciprofloxacin from waste water and CO2 conversion using sustainable coal-char/polymeric-g-C3N4/RGO metal-free nano-hybridsElectronic supplementary information (ESI) available: XPS spectrum of RPC (Fig. S1), photolysis of CIF and ESD under solar light (Fig. S2), degradation of ESD and CIF in the presence of binary photocatalysts (Fig. S3a), reaction kinetics for degradation in the presence of PCN/RGO (Fig. S3b), reaction kinetics for degradation
Herein, we report the synthesis of a metal-free coal-char supported polymeric g-C 3 N 4 /RGO (RPC) nano-photocatalyst for the efficient solar powered degradation of the noxious emerging pollutants ciprofloxacin (CIF) & β-estradiol (ESD) and conversion of CO 2 into CH 4 , CO & O 2 . RPC shows...
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| Main Authors | , , , , , , , |
|---|---|
| Format | Journal Article |
| Language | English |
| Published |
11.09.2017
|
| Online Access | Get full text |
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| Summary: | Herein, we report the synthesis of a metal-free coal-char supported polymeric g-C
3
N
4
/RGO (RPC) nano-photocatalyst for the efficient solar powered degradation of the noxious emerging pollutants ciprofloxacin (CIF) & β-estradiol (ESD) and conversion of CO
2
into CH
4
, CO & O
2
. RPC shows good photocatalytic and adsorption activity owing to its high surface area and reduced charge recombination rate. The photodegradation results of the treated water sample were investigated in terms of reaction kinetics, active species trapping experiments, high resolution mass spectrometry (HR-MS) and Chemical Oxygen Demand (COD) analysis. The higher solar photoactivity is attributed to the higher surface area, higher visible absorption, charge transfer, and reduced recombination. The superoxide radical anions were found to be the major active species in photodegradation, which is also supported by the band structure analysis. The catalytic activity is highly enhanced by the addition of H
2
O
2
, O
2
and O
3
as they facilitate the formation of radicals. The possible degradation pathways for the degradation of CIF and ESD have been proposed. This work shows promising solar-active metal-free photocatalysts for efficient environmental remediation and CO
2
conversion to fuels.
We report the synthesis of a polymeric g-C
3
N
4
/RGO nano-photocatalyst for the degradation of ciprofloxacin and β-estradiol and conversion of CO
2
into CH
4
, CO & O
2
. |
|---|---|
| Bibliography: | conversion by C 2 Electronic supplementary information (ESI) available: XPS spectrum of RPC (Fig. S1), photolysis of CIF and ESD under solar light (Fig. S2), degradation of ESD and CIF in the presence of binary photocatalysts (Fig. S3a), reaction kinetics for degradation in the presence of PCN/RGO (Fig. S3b), reaction kinetics for degradation in the presence of PCN/coal-char (Fig. S3d), effect of pH on photodegradation of ESD and CIF in the presence of RPC (Fig. S4), time-evolution of aqueous ozone concentration during the course of batch ozone decomposition experiments (Fig. S5a), concentration of H 3 4 and RGO (Fig. S6), coal-char production from a bio-fuel reactor, radical scavenging experiment, stability and reusability, band gap parameters (Table S1) and kinetics parameters for adsorption of CIF and ESD (Table S2). See DOI evolved during phot-decomposition of ozone (Fig. S5b), product amounts evolved during the photo-catalytic CO 10.1039/c7nj01580a N O |
| ISSN: | 1144-0546 1369-9261 |
| DOI: | 10.1039/c7nj01580a |