Riboflavin Functionalized Dextrin-Sodium Alginate Based Fluorescent Sensor: Detoxification of Cu²⁺ and Ni²⁺ Ions

Abstract

The research work performed and described here is in regard to synthesis of dextrin-sodium alginate based hybrid hydrogel film. It showed the maximized percentage swelling at 1145% after optimization of all reaction parameters. It was further functionalized with a fluorophore, i.e., riboflavin, to introduce luminescent behavior to the film. The RDSA film can not only remove but also sense the copper and nickel ions in the surroundings very sensitively up to 0.4445 μM and 0.2571 μM, respectively, which is in the desired range of EPA limits. The RDSA film could detoxify the 5 μM copper and nickel ion concentrated solution to an extent of 95.54% and 91.30%, respectively. The adsorption followed the Flory–Huggins model along with second-order kinetics specifically for higher metal ion concentrations. The detection and adsorption occur as a result of complex formation between the film and metal ion. The intraparticle diffusion mechanism is of two steps and occurs through the outer surface to the inner pores. The ions can also be desorbed with EDTA to reuse the film for further recovery of the metal ions. It can be done for multiple cycles, and finally the film can be degraded biologically when it is of no use. It is due to natural materials being used for the synthesis.

N-alkylation briefly constructs tunable multifunctional sensor materials: Multianalyte detection and reversible adsorption

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Borax assisted synthesis of dialdehyde Carboxymethyl cellulose-Dextrin/Gelatin based biocompatible self-healing hydrogel

“…Hence, the role of borax as well as glutaraldehyde is con rmed through the data. It is concluded that hydrogel was formed through H-bonding with tetrahydroxyl borate units and imide bond formation among various carbonyl units and amine groups (Priya et al, 2020;Sharma et al, 2020;Sharma et al, 2019a;Priya et al, 2019;Sharma et al, 2019b;Sharma et al, 2019c;Talebian et al, 2019) (Fig. 2f).…”

“…1n). The nal hydrogel consist of imide linkages and borax based H-bonding, hence the basic elements are carbon (51.49 weight% and 53.14 atomic%), oxygen (13.73 weight% and 10.64 atomic%), nitrogen (13.94 weight% and 12.34 atomic%) and boron (20.84 weight% and 23.89 atomic%) (Priya et al, 2020;Sharma et al, 2020) (Fig. 1q).…”

Polymer Based Engineered Materials for Sustainable Agriculture

“…In recent years, various polymer based engineered materials such as nanocarriers, electrospun fibers, hydrogels, and sensors have been reported in the literature for various applications including sustainable agriculture. , Among various nanoformulations, polymer based nanomaterials or nanocomposites are often explored as carriers of fertilizers/pesticides owing to their high surface areas, high loading efficiencies, and tunable release rate along with their environmental friendliness and biodegradable nature. , On the other hand, electrospun fibers exhibit a porous structure and an extremely high surface-to-volume ratio which facilitate the incorporation of more than one active ingredient simultaneously . Further, polymer based hydrogels possess hydrophilic functional moieties such as OH and COOH in their structures which are capable of holding water molecules inside their hydrophilic pores for a prolonged period . Thus, these hydrogels can help in providing better soil management for effective plant growth.…”