Synthesis, characterization and photo-catalytic activity of guar-gum-<i>g</i>-aliginate@silver bionanocomposite material

Hasan, Imran; Khan, Rais Ahmad; Alharbi, Walaa; Alharbi, Khadijah H.; Khanjer, Maymonah Abu; Alslame, Ali

doi:10.1039/d0ra00163e

Cited by 32 publications

(15 citation statements)

References 63 publications

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“…It develops a quadratic regression equation with high desirability and good precision, which can be frequently used in numerous fields such as bacterial growth, biological hydrogen production, enzyme synthesis, and azo dye decolorization . The biggest benefit of taking RSM is that it decreases the replication of experiments which are needed to determine different parameters and interactions between them . The aim of the present study was to synthesize ZnO/CuO@Alg bionanocomposite (BNC) with efficiency toward the degradation of toxic PNP in the presence of visible light.…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly Green Synthesis of the ZnO-Doped CuO@Alg Bionanocomposite for Efficient Oxidative Degradation of p-Nitrophenol

et al. 2020

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In the present study, ecofriendly green synthesized ZnO/CuO nanorods were prepared by using the stabilizing and reducing characteristics of the alginate biopolymer. The bionanocomposite (BNC) material was characterized by various sophisticated analytical tools such as Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy− energy dispersive X-ray spectroscopy, transmission electron microscopy, UV−visible spectroscopy, differential scanning calorimetry, and the Brunauer−Emmett−Teller (BET) method. The composition of ZnO/CuO@Alg BNC was found to be C (16.16 ± 0.42%), O (42.26 ± 1.87%), Cu (31.96 ± 1.05%), and Zn (9.62 ± 0.48%), which also supports the approximate 3:1 ratio of Cu 2+ and Zn 2+ taken as the precursor. The nanocrystalline spinel ferrite was found to have a BET specific surface area of 19.24 m 2 g −1 with a total pore volume of 0.075 cm 3 g −1 and 1.45 eV as the band gap energy (E g ). Further, the material was applied for the photodegradation of p-nitrophenol (PNP) under the advanced oxidative process (AOP) under visible sunlight irradiation. The visible light radiation was used for the degradation of PNP under pH 2 conditions and resulted in 98.38% of the photocatalytic efficiency of the ZnO/CuO@Alg catalyst within 137 min of irradiation time. The photocatalytic reaction was best defined by the pseudo-first-order kinetics which involves the adsorption of the PNP molecule on the surface of the catalyst, thereby demineralizing it in the presence of advanced active • OH radicals. The values of rate constant for the pseudo-first-order model (k 1 ) were calculated as 0.013, 0.016, 0.019, 0.021, and 0.023 min −1 with half-life periods of 53.31, 43.31, 36.47, 33.00, and 30.13 min for 10−50 mg L −1 PNP concentrations. The presence of t-butyl alcohol decreases the photocatalytic efficiency, which suggests that the degradation of PNP was accomplished by the • OH oxidative radical.

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Section: Introductionmentioning

confidence: 99%

Ecofriendly Green Synthesis of the ZnO-Doped CuO@Alg Bionanocomposite for Efficient Oxidative Degradation of p-Nitrophenol

et al. 2020

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“…The synthesis of the respective materials was conducted using a previously reported protocol, but with some modifications [ 28 , 29 ]. Briefly, a solution containing 3.5% ( w / v ) alginate was added to a solution of AgNO 3 (0.07 M) in DI water (100 mL), and the resulting mixture was stirred at 8000 rpm and 298 K for 5 h. The color of the mixture slowly became pale yellow, indicating the occurrence of nucleation of the Ag NPs supported by alginate side chains.…”

Section: Methodsmentioning

confidence: 99%

“…The XRD pattern shows that PAN is amorphous. The XRD spectrum of PAN-g-Alg@Ag contain all peaks associated with Alg@Ag NPs at 28 Table 1 shows the diffraction angle, FWHM, interlayer spacing, crystal size, dislocation density, and percent crystallinity of the pure, functionalized Alg@Ag NPs. Generally, PAN-g-Alg@Ag NC has smaller crystals (17.48 nm) and large dislocation density (3.27 × 10 16 ) lines (m −2 ) at the (200) peak.…”

Section: Characterization Of the Synthesized Nanocompositementioning

confidence: 99%

A Highly Efficient Ag Nanoparticle-Immobilized Alginate-g-Polyacrylonitrile Hybrid Photocatalyst for the Degradation of Nitrophenols

et al. 2020

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Herein, we report PAN-g-Alg@Ag-based nanocatalysts synthesis via in situ oxidative free-radical polymerization of acrylonitrile (AN) using Alg@Ag nanoparticles (Alg@Ag NPs). Various analytical techniques, including FTIR, XRD, SEM, TEM, UV–Vis, and DSC, were employed to determine bonding interactions and chemical characteristics of the nanocatalyst. The optimized response surface methodology coupled central composite design (RSM–CCD) reaction conditions were a 35-min irradiation time in a 70-mg L−1 2,4-dinitrophenol (DNP) solution at pH of 4.68. Here, DNP degradation was 99.46% at a desirability of 1.00. The pseudo-first-order rate constant (K1) values were 0.047, 0.050, 0.054, 0.056, 0.059, and 0.064 min−1 with associated half-life (t1/2) values of 14.74, 13.86, 12.84, 12.38, 11.74, 10.82, and 10.04 min that corresponded to DNP concentrations of 10, 20, 30, 40, 50, 60, and 70 mg L−1, respectively, in the presence of PAN-g-Alg@Ag (0.03 g). The results indicate that the reaction followed the pseudo-first-order kinetic model with an R2 value of 0.99. The combined absorption properties of PAN and Alg@Ag NPs on copolymerization on the surface contributed more charge density to surface plasmon resonance (SPR) in a way to degrade more and more molecules of DNP together with preventing the recombination of electron and hole pairs within the photocatalytic process.

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“…Silver nanoparticles have been used in catalysis, sensors, textile, cosmetics, biomedical, and pharmaceutical and cosmetics applications. Furthermore, Ag nanoparticles have been explored as nanofillers for the development of antimicrobial packaging materials for food preservation [75,76]. Table 4 summarizes the application of polysaccharide-silver packaging and their effects on quality parameters of some fruit and meat products.…”

Section: Silver (Ag)mentioning

confidence: 99%

Polysaccharide-Based Packaging Functionalized with Inorganic Nanoparticles for Food Preservation

et al. 2021

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Functionalization of polysaccharide-based packaging incorporating inorganic nanoparticles for food preservation is an active research area. This review summarizes the use of polysaccharide-based materials functionalized with inorganic nanoparticles (TiO2, ZnO, Ag, SiO2, Al2O3, Fe2O3, Zr, MgO, halloysite, and montmorillonite) to develop hybrid packaging for fruit, vegetables, meat (lamb, minced, pork, and poultry), mushrooms, cheese, eggs, and Ginkgo biloba seeds preservation. Their effects on quality parameters and shelf life are also discussed. In general, treated fruit, vegetables, mushrooms, and G. biloba seeds markedly increased their shelf life without significant changes in their sensory attributes, associated with a slowdown effect in the ripening process (respiration rate) due to the excellent gas exchange and barrier properties that effectively prevented dehydration, weight loss, enzymatic browning, microbial infections by spoilage and foodborne pathogenic bacteria, and mildew apparition in comparison with uncoated or polysaccharide-coated samples. Similarly, hybrid packaging showed protective effects to preserve meat products, cheese, and eggs by preventing microbial infections and lipid peroxidation, extending the food product’s shelf life without changes in their sensory attributes. According to the evidence, polysaccharide-hybrid packaging can preserve the quality parameters of different food products. However, further studies are needed to guarantee the safe implementation of these organic–inorganic packaging materials in the food industry.

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Synthesis, characterization and photo-catalytic activity of guar-gum-g-aliginate@silver bionanocomposite material

Abstract: The green mechanism for the synthesis of nanoparticles and their application to the wastewater treatment is of inordinate curiosity to the research community.

Cited by 32 publications

References 63 publications

Ecofriendly Green Synthesis of the ZnO-Doped CuO@Alg Bionanocomposite for Efficient Oxidative Degradation of p-Nitrophenol

Ecofriendly Green Synthesis of the ZnO-Doped CuO@Alg Bionanocomposite for Efficient Oxidative Degradation of p-Nitrophenol

A Highly Efficient Ag Nanoparticle-Immobilized Alginate-g-Polyacrylonitrile Hybrid Photocatalyst for the Degradation of Nitrophenols

Polysaccharide-Based Packaging Functionalized with Inorganic Nanoparticles for Food Preservation

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