Your browser doesn't support javascript.
loading
Molecular surface-dependent light harvesting and photo charge separation in plant-derived carbon quantum dots for visible-light-driven OH radical generation for remediation of aromatic hydrocarbon pollutants and real wastewater.
Meena, Savita; Sethi, Mukul; Saini, Surendra; Kumar, Krishan; Saini, Pratibha; Meena, Swati; Kashyap, Sunidhi; Yadav, Monika; Meena, Mohan Lal; Dandia, Anshu; Nirmal, Naresh Kumar; Parewa, Vijay.
Afiliação
  • Meena S; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
  • Sethi M; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
  • Saini S; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
  • Kumar K; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
  • Saini P; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India; Friedrich Schiller Univ Jena, Inst Anorgan & Analyt Chem, Humboldt Str 8, D-07743 Jena, Germany.
  • Meena S; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
  • Kashyap S; Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, India.
  • Yadav M; Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, India.
  • Meena ML; Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, Mangaluru 575025, India.
  • Dandia A; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
  • Nirmal NK; Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, India.
  • Parewa V; Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India. Electronic address: parewavijay.parewa@gmail.com.
J Colloid Interface Sci ; 660: 756-770, 2024 Apr 15.
Article em En | MEDLINE | ID: mdl-38271811
ABSTRACT
Despite the growing emphasis on eco-friendly nanomaterials as energy harvesters, scientists are actively searching for metal-free photocatalysts to be used in environmental remediation strategies. Developing renewable resource-based carbon quantum dots (CQDs) as the sole photocatalyst to harvest visible light for efficient pollutant degradation is crucial yet challenging, particularly for addressing the escalating issue of water deterioration. Moreover, the photocatalytic decomposition of H2O2 under visible light irradiation remains an arduous task. Based on this, we designed two types of CQDs, C-CQDs (carboxylic-rich) and A-CQDs (amine-rich) with distinct molecular surfaces. Owing to the higher amount of upward band bending induced by amine-rich molecular surface, A-CQDs efficiently harvest the visible light and prevent recombination kinetics resulting in prolonged lifetimes (25 ps), and augmented charge carrier density (35.7 × 1018) of photoexcited charge carriers. A-CQDs enabled rapid visible-light-driven photolysis of H2O2 (k = 0.058 min-1) and produced higher quantity of •OH radicals (0.158 µmol/sec) for the mineralization of petroleum waste, BETX (i.e. Benzene, Ethylbenzene, Toluene and Xylene) (k = 0.017-0.026 min-1) and real textile wastewater (k = 0.026 min-1). To assess comparative toxicities of both remediated and non-remediated real wastewater samples in a time and dose depended manner, Drosophila melanogaster was used as a model organism. The findings unequivocally demonstrate the potential of remediated wastewater for watering urban forestry.
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: J Colloid Interface Sci Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: J Colloid Interface Sci Ano de publicação: 2024 Tipo de documento: Article