Sadhana Jadaun; Usha Sharma; Ringshangphi Khapudang; Saleem Siddiqui
Abstract
Conventional food packaging materials such as plastic or other petro-based polymers provide the necessary strength and barrier qualities, but they are associated with economic and environmental associated hazards. In order to have a material that can effectively compete with petroleum-based plastics, ...
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Conventional food packaging materials such as plastic or other petro-based polymers provide the necessary strength and barrier qualities, but they are associated with economic and environmental associated hazards. In order to have a material that can effectively compete with petroleum-based plastics, the ecofriendly biodegradable biopolymer reinforced bio-nanocomposites from renewable agricultural biomass can be a promising alternative. Lignocellulosic biomass from agricultural wastes can serve as promising raw material for nanocellulose extraction. This review focuses on extensive studies done on pretreatment, isolation of nanocellulose along with their role as reinforcement agent in various biopolymers such as poly-lactic acid, starch, chitosan, alginate and carrageenan. The uniqueness of this review is to give readers a thorough overview of the impact of nanocellulose on the mechanical, barrier, and thermal properties of biopolymeric film. The review will also provide a comprehensive understanding of the supply chain’s elements, their opportunity and constraints for shifting the sustainable production system of cellulose nanocomposites towards circular economy. Efforts have also been made to combine all the recent studies related to key aspects and engineering of nanocellulose biocomposites. The concept of 3D/4D printing technology of cellulose nanocomposites in conjunction with Shape Memory Polymers (SMP) in the domain of commercial development of smart materials and self- folded packages for food applications has also been discussed.
Vikas Vikas; Pawan S. Rana
Abstract
The study involved the preparation of CoFe2O4 -CNT nanocomposites through the dispersion of CNT and ferrites into Xylene. Cobalt ferrites were synthesized using a chemical co-precipitation method. The main objective was to investigate the structural, optical and photocatalytic properties of the synthesized ...
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The study involved the preparation of CoFe2O4 -CNT nanocomposites through the dispersion of CNT and ferrites into Xylene. Cobalt ferrites were synthesized using a chemical co-precipitation method. The main objective was to investigate the structural, optical and photocatalytic properties of the synthesized nanocomposites using Rose Bengal dye as a model pollutant. Structural analysis was conducted using Transmission Electron Microscopy (TEM) and XRD, confirming the formation of a Single-phase spinal structure of ferrites and nanocomposites with an average particle size of around 25 nm. UV-Vis. spectroscopy and Photoluminescence (PL) were used to study the optical properties of the samples, indicating that the bandgap of the sample is within the visible range, making it suitable for visible light photocatalysis. The band gap shifted to a slightly lower side after the formation of the nanocomposite, and the PL revealed that recombination time increased after the formation of nanocomposites compared to pure CoFe2O4. FTIR spectroscopy confirmed the formation of the spinal structure of ferrites and identified various bonds present in the sample. The photocatalytic activity of the sample showed a significant increase in the dye degradation capacity of ferrites. This increase in photocatalytic activity was consistent with earlier results obtained by PL spectroscopy, which confirmed the formation of a Z-scheme visible light photocatalyst.
Atiyeh Yazdani; Mohammad Sayadi; ava Heidari
Abstract
Worldwide studies on contamination levels of anti-inflammatory drugs such as ibuprofen (IBF) show that their concentration in water bodies is increasing. Graphene oxide/palladium nanoparticle (Pd NPs-GO) was synthesized via a simple solvothermal method. The characteristics of the as-prepared samples ...
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Worldwide studies on contamination levels of anti-inflammatory drugs such as ibuprofen (IBF) show that their concentration in water bodies is increasing. Graphene oxide/palladium nanoparticle (Pd NPs-GO) was synthesized via a simple solvothermal method. The characteristics of the as-prepared samples were examined using X-ray fluorescence, scanning electron microscopy, and Fourier transforms infrared spectroscopy. The performance of Pd NPs-GO nanocomposite as a sonocatalyst was evaluated for the degradation of IBF under ultrasonic irradiation (35 kHz), and compared with graphene (GO) and palladium nanoparticle (Pd NPs). Some influencing parameters such as IBF initial concentration, pH, catalyst dosage, and irradiation time were investigated. The findings showed that Pd NPs-GO nanocomposite exhibited higher sonocatalyst activity for IBF than other catalysts. A higher ibuprofen degradation efficiency was observed in lower pH (3), lower initial concentration (30 mg/L), higher catalyst dosage (2 g/L), and higher ultrasonic irradiation time (50 min). The kinetics of the degradation of IBF followed pseudo-first-order reaction kinetics.