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Muhammad Amir,Tahir Fazal,Javed Iqbal,Aamir Alaud Din,Ashfaq Ahmed,Asim Ali,Abdul Razzaq,Zulfiqar Ali,Muhammad Saif Ur Rehman,박영권 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
The expensive carbonaceous substrates including graphene, reduced graphene oxide, carbon nanotubeshave been coupled with ZnO to improve the properties and photocatalytic performance of carbon basedZnO photocatalysts. To replace these expensive materials, biochar offers as a low-cost alternative to preparebiochar-based photocatalysts. In this study, Calotropis gigantea leaves derived biochar-ZnO (BC-ZnO)composites were synthesized to overcome the ZnO related problems (charge recombination, wider bandgap, and poor visible light absorption). Different BC-ZnO (BCZ-1–3) composites were characterized toevaluate their intrinsic properties and composites were employed to degrade ciprofloxacin (CIP). BCZ-3composite exhibited slower recombination of electron-hole pairs, lower band gap (2.97 eV), and betterlight absorption in visible region than ZnO. The enhanced adsorptive-photocatalytic degradation efficiencywas attained up to 98.5% using BCZ-3 than BC (46.2%) and ZnO (41.4%). The O2 and OH radicalswithin BCZ-3 are dominant reactive species indulged in CIP photocatalytic degradation. BCZ-3 photocatalystexhibits 80% degradation of CIP after four regeneration cycles. The maximum adsorption capacitywas achieved 54.18 mg g1 for BCZ-3 than BC (46.20 mg g1) and ZnO (15.55 mg g1). The results showthat BCZ-X composites can be used as stable, efficient, economical, and sustainable composite for therecovery of pharmaceutical wastewater.
Khalid Mahmood Zia,Shahid Adeel,Fazal-ur- Rehman,Habiba Aslam,Muhammad Kaleem Khosa,Mohammad Zuber 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The current research presents the exploration of coloring potential of neem bark under the influence ofultrasonic treatment. It is found that good color strength is obtained when tannin from bark is extractedin acidified methanol medium and is used to dye irradiated cotton fabric. New shades and good ratings offastness were obtained when optimal fabric was mordanted with herbal biomolecules where excellentrating has been obtained after bio-mordanting the fabrics under optimal conditions. It is concluded thatUS treatment being green tool in natural dyeing has a great potential to isolate colorants from plantsources under mild conditions.