Abstract
The recovery or degradation of organic wastes in the circular economy concept continues to be environmental protection challenges. In this study, we proposed a metal catalyst free production of useful non-doped (CDs) and nitrogen doped carbon dots (N-CDs) nanoparticles, generated from a greener hydrothermal top-down method, using paper scraps solid organic wastes from the pulp and paper industry. Both materials were fully characterized. At the same time, these high-added value materials were used as catalysts for the photocatalytic degradation of pollutants and for generating hydrogen through hydrogen evolution reaction (HER). The morphological study revealed the presence of nanoparticles with a higher carbon content than the raw biomass, from 13 to 51 wt% as assessed by X-ray photoelectron spectroscopy (XPS), ranging in size from 4.4 to 6.8 nm. The ability of these materials to catalyze the photodegradation of 4-nitrophenol has been tentatively investigated. The N-CDs proved to be more active than undoped-CDs to degrade 4-nitrophenol due to the smaller bandgap and more active sites available which will also accept the transferred electrons for H2 generation or 4-nitrophenol reduction.
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Acknowledgements
The authors thank the CNPq, CAPES-PrInt, CAPES (financial code 001), FAPESC, and INCT-Catálise. The authors also thank the Universidad Pública de Navarra for a post-doctoral María Zambrano grant financed by the European Union-Next Generation EU. MA thanks to the Spanish Ministry of Science and Innovation (MCIN/AEI/10.13039/501100011033) through project PID2021-122613OB-I00. This research was also funded by the Spanish Ministry of Science and Innovation (PID2021-126235OB-C32 funded by MCIN/ AEI/10.13039/501100011033 / and FEDER funds and TED2021-130756B-C31 MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe” by the European Union NextGenerationEU/PRTR).
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Conselho Nacional de Desenvolvimento Científico e Tecnológico,402691/2021-0,Rosely Aparecida Peralta,Coordenação de Aperfeiçoamento de Pessoal de Nível Superior,PrInt,Herculys Bernardo Jorge,Financial code 001,Rosely Aparecida Peralta,Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina,general,Rosely Peralta,Instituto Nacional de Ciência e Tecnologia de Catálise em Sistemas Moleculares e Nanoestruturados,INCT-Catálise,Rosely Aparecida Peralta,Ministerio de Ciencia,Innovación y Universidades,MCIN/AEI/10.13039/501100011033,Enrique Rodríguez-Castellon,TED2021-130756B-C31,Enrique Rodríguez-Castellon,Ministerio de Ciencia e Innovación,PID2021-126235OB-C32,Manuel Algarra
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Jorge, H.B., Della-Rocca, D.G., Herrera, E. et al. A Sustainable Approach for the Valorization of Lignocellulosic Biomass in Active Photo- and Electrocatalyst Carbon Dots. Waste Biomass Valor (2024). https://doi.org/10.1007/s12649-024-02610-4
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DOI: https://doi.org/10.1007/s12649-024-02610-4