Plasma-bioresource-derived multifunctional porous NGQD/AuNP nanocomposites for water monitoring and purification
2022; Elsevier BV; Volume: 451; Linguagem: Inglês
10.1016/j.cej.2022.139083
ISSN1873-3212
AutoresDarwin Kurniawan, Michael Ryan Rahardja, Pavel V. Fedotov, Е. Д. Образцова, Kostya Ostrikov, Wei‐Hung Chiang,
Tópico(s)Advanced Nanomaterials in Catalysis
ResumoMultifunctional metal–organic composites with controlled structures and properties are attractive for smart optoelectronic, drug delivery, cancer therapy, clean energy, and environmental applications. Here we develop lightweight, porous metal-graphene composites with uniformly dispersed nitrogen-doped graphene quantum dots (NGQDs) and gold nanoparticles (AuNPs) using reactive non-thermal microplasmas under ambient conditions. Synergy of NGQDs and AuNPs accelerates the polymer cross-linking during synthesis and ensures the requisite properties for simultaneous water monitoring and purification including reliable photoluminescence for heavy metal detection, as well as high adsorption capacity and fast catalytic degradation of organic pollutants. Large-area hierarchical composites with tunable porosity and self-healing ability can be fabricated by the fast and scalable plasma process avoiding toxic chemicals and high temperatures. The composite achieves 120 g g−1 water purification within 60 min at 0.13 mM 4-nitrophenol concentration and is able to monitor the water quality against Hg2+ with the detection limit of 2.2 μM, producing 2880 L kg−1 freshwater per day. Besides, almost 100 % of recalcitrant dye, remazol brilliant blue R, with the concentration of 20 ppm can be adsorbed by the composite in 120 min. Our work provides new insights into design and production of high-performance graphene-metal composites for emerging applications.
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