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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-hybrids

Abstract

Herein we report the synthesis of a metal free coal-char supported polymeric g-C3N4/RGO (RPC) nano-photocatalysts for efficient solar powered degradation of noxious emerging pollutants ciprofloxacin (CIF) & β-estradiol (ESD) and conversion of CO2 into CH4, CO & O2. RPC shows good photocatalytic and adsorption activity owing to high surface area and reduced charge recombination rate. The photodegradation results of treated water sample were investigated in terms of reaction kinetics, active species trapping experiment, 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, reduced recombination. The superoxide radical anions were found to be major active species in photodegradation which is also supported by the band structure analysis. The catalytic activity is highly enhanced by addition of H2O2, O2 and O3 as they facilitate the formation of radicals. The possible degradation pathways for degradation of CIF and ESD have been proposed. This work shows promising solar-active metal free photocatalysts for efficient environmental remediation and CO2 conversion to fuels.

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Publication details

The article was received on 12 May 2017, accepted on 07 Aug 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ01580A
Citation: New J. Chem., 2017, Accepted Manuscript
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    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-hybrids

    A. Kumar, G. Sharma, M. Naushad, R. Cataluna, F. J. Stadler, A. Kumar, A. A. Ghfar and M. R. Khan, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ01580A

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