Carbon Dots-Doped Electrospun Fibers for Simultaneous Metal Ion Detection and Adsorption of Dyes

Abstract

The required treatment and monitoring of contaminants in wastewater reinforces the development of low-cost adsorbents/ chemosensors, introducing advantages relative to the detection/removal of toxic metals and dyes. Herein, it is reported a two-step process of fabrication of fluorescent carbon dots via the hydrothermal treatment of amino acids for the following encapsulation in electrospun fibers. The prominent anionic behavior of electrospun fibers of Eudragit L100 was explored for adsorption of cationic dyes (methylene blue and crystal violet)-with the prevailing electrostatic interaction of parts being favored by the formation of monolayers on the surface of adsorbents. On the other hand, the controlled release of carbon dots (CDs) from fibers to the reactor can be explored for a second application: the nitrogen ligands from released glycinebased carbon dots can be explored to indicate the presence of metal ions in aqueous solution. Our experiment resulted in a quenching in the fluorescence of the CDs in order of 90% in the emission of particles in the response of the presence of Fe 3+ ions, characterizing a promising perspective for this experimental system.

An overview of polyester/hydroxyapatite composites for bone tissue repairing

“…As an emerging and booming technology to fabricate micro -/nano - fibers, electrospinning technique has arisen great attentions [ [37] , [38] , [39] ]. Electrospinning is a unique fiber fabricating process [ 39 ].…”

π‐Conjugated Copper Phthalocyanine Nanoparticles as Highly Sensitive Sensor for Colorimetric Detection of Biomarkers

“…In this circumstance, abundant nanomaterials with enzyme-like activities have been developed as substitutes for natural enzymes for detecting biomarkers due to their low cost, high stability, broad working temperature and pH, easy storage, and tunable sensing activity and selectivity. [4][5][6] To date, more than fifty types of nanomaterials have been found with diverse enzyme-like activities (peroxidases (PODs), oxidases (OXDs), glucose oxidases (GOxs), and so on), [7][8][9] such as the noble metals, [10][11][12] metal oxides, [13][14][15] carbon nanostructures, [16][17][18][19][20] and metal-organic frameworks (MOFs). [21][22][23][24] However, the high cost of noble metals, the low operational stability and high cytotoxicity of metal oxides, the poor accuracy of carbon-based materials due to their high absorbabilities to substrates, severally hindering their applications as sensors for detecting biomarkers.…”

“…To date, more than fifty types of nanomaterials have been found with diverse enzyme‐like activities (peroxidases (PODs), oxidases (OXDs), glucose oxidases (GOxs), and so on), [7–9] such as the noble metals, [10–12] metal oxides, [13–15] carbon nanostructures, [16–20] and metal–organic frameworks (MOFs) [21–24] . However, the high cost of noble metals, the low operational stability and high cytotoxicity of metal oxides, the poor accuracy of carbon‐based materials due to their high absorbabilities to substrates, severally hindering their applications as sensors for detecting biomarkers.…”

Nature-Inspired Polyethylenimine-Modified Calcium Alginate Blended Waterborne Polyurethane Graded Functional Materials for Multiple Water Purification

“…Many technologies and materials have been applied to water purification. − Boiling is a simple water treatment technology, which can effectively kill pathogens. − However, boiling cannot purify pollutants such as heavy metals. The distillation system of obtaining safe drinking also faces the challenges of complex systems and high-energy consumption .…”