Gold/Konjac glucomannan bionanocomposites for catalytic degradation of mono-azo and di-azo dyes

Wei, Dong; Liu, Ying; Xiong, Yi; Peng, Junjun; Mahmud, Sakil; Liu, Huihong

doi:10.1016/j.inoche.2020.108156

Cited by 25 publications

(5 citation statements)

References 26 publications

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“…, 2010). Moreover, as-synthesized AgNPs are covered with a thin film of non-hazardous carbohydrate cladding (Chen et al. , 2020).…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, AgNPs are discharged on liquid media by lower than 10 ppm concentration, which is below the toxicity limits for human health (Su arez et al, 2010). Moreover, as-synthesized AgNPs are covered with a thin film of non-hazardous carbohydrate cladding (Chen et al, 2020). Consequently, it could be presumed that the reported technology for OCFs functionalization using the in situ synthesis of Ag is safe and secured in terms of toxicity levels for human health.…”

Section: Synthesis Mechanismmentioning

confidence: 99%

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Enhancing mechanical and antibacterial performances of organic cotton materials with greenly synthesized colored silver nanoparticles

Hasan

Wang

Mahmud³

et al. 2022

IJCST

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PurposeFunctionalization of organic cotton fabrics (OCFs) by in situ deposition of chitosan reduced-stabilized silver nanoparticles (AgNPs). No other toxic chemicals used to warrant an ecofriendly synthesis protocol. Human toxicity of silver systematically avoided to use as textile clothing. Primary colors (nearly-red, yellow and blue) were imparted on OCFs via localized surface plasmon resonance (LSPR) of AgNPs. Decent mechanical properties and laundering durability in terms of antibacterial/fastness test improved mechanical properties.Design/methodology/approachSilver nanoparticles can be synthesized by using silver nitrate along with commercially available chitosan. Due to the surface LSPR property of silver nanoparticles, it exhibits versatile colors depending on the synthesizing procedures. The coloration occurs due to the electrostatic interaction between the AgNPs and chitosan-treated OCF. The nanotreated fabrics provide excellent mechanical properties with improved antibacterial effects.FindingsX-ray fluorescence (XRF) analysis quantifies the developed materials in the substrates. Scanning electron microscopy (SEM) characterization indicates the appearance and morphologies of silver nanoparticles into the fabric surface after the coloration process. It proves that the treated cotton knit fabric exhibits the LSPR optical features of AgNPs. The antibacterial and mechanical properties confirm the improved functionality of products.Originality/valueImproved mechanical properties, antibacterial performances and coloration effects on organic cotton substrates in terms of chitosan-mediated nanosilver are not yet studied.

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“…, 2010). Moreover, as-synthesized AgNPs are covered with a thin film of non-hazardous carbohydrate cladding (Chen et al. , 2020).…”

Section: Resultsmentioning

confidence: 99%

Section: Synthesis Mechanismmentioning

confidence: 99%

Enhancing mechanical and antibacterial performances of organic cotton materials with greenly synthesized colored silver nanoparticles

Hasan

Wang

Mahmud³

et al. 2022

IJCST

Self Cite

View full text Add to dashboard Cite

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“…During the dissolution process, the diffusion migration rate of water molecules is higher than that of KGM, resulting in the swelling of KGM and an increase in water absorption [ 53 ]. When combined with water molecules through freezing, KGM forms more stable macromolecules and exhibits viscosity, making it a suitable gel carrier for aquatic food preservation [ 54 , 55 ].…”

Section: Konjac Glucomannan and Its Structural Featuresmentioning

confidence: 99%

Structure, Merits, Gel Formation, Gel Preparation and Functions of Konjac Glucomannan and Its Application in Aquatic Food Preservation

Sun

et al. 2023

Foods

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Konjac glucomannan (KGM) is a natural polysaccharide extracted from konjac tubers that has a topological structure composed of glucose and mannose. KGM can be used as a gel carrier to load active molecules in food preservation. The three-dimensional gel network structure based on KGM provides good protection for the loaded active molecules and allows for sustained release, thus enhancing the antioxidant and antimicrobial activities of these molecules. KGM loaded with various active molecules has been used in aquatic foods preservation, with great potential for different food preservation applications. This review summarizes recent advances in KGM, including: (i) structural characterization, (ii) the formation mechanism, (iii) preparation methods, (iv) functional properties and (v) the preservation of aquatic food.

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“…The basic unit of KGM is shown in Figure 1, which contributes to construct the final tertiary structure [17], the first level is a linear one composed of glucose and mannose as repeating units according to a certain molar ratio, the second level is a two-fold helix presented by the extension of KGM main chains, and the third level is the 3D network based on the rotation of the secondary structure. Owing to such unique structure, KGM exhibits physicochemical characteristic summarized as rheology, thickening, gelling, film-forming and water retention property [18][19][20], especially the gelling and film-forming, which make it possible to process KGM into membrane [21,22]. Baking-carbonization is processed at a relatively low-temperature, the natural herbaceous plants experienced this treatment changes into carbon materials, meanwhile, it retains the aroma sources from raw materials, which can be realized a certain aroma enhancement effect [23,24].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Research of Baking-Carbonized Functional Flavors/Konjac Glucomannan Porous Composite Membrane

Zhang

Liu

Duan

et al. 2022

Proceedings of the 2022 International Conference on Smart Manufacturing and Material Processing (SMMP2022)

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To develop one porous additive material that can be assembled on cigarette filter, and achieve both functions of reducing hazard substances like tar and providing special aroma and moisture, this study innovatively selects the raw materials like baking-carbonized functional flavors with special aroma and konjac glucomannan (KGM) with properties of water absorption, gelling and film-forming, following the steps of casting into membrane shape, thermostatic crosslinking for strength enhancement and freeze-drying for pore creating to prepare 5 porous composite membranes based on baked-carbonized functional flavors and konjac glucomannan (KGM) were prepared. The composite structure, morphologies on the surface and the cross section, porosity structures including mesoporous and macropore of the porous composite membranes were characterized, the tensile performance and aroma constituents through solid phase microextraction and hazardous substances adsorption as packed into the commercial cigarette were also studied. Results showed that all baked-carbonized functional flavors were carbonized into amorphous, and contained the groups of aromatic components like ≡C-H, C=O, C-O-C (aldehydes, esters), cross-linking achieved the entanglement of KGM segments by deacetylation. When compounded, KGM acted as the framework to build the 3D porous network structure, and the functional flavor powders were wrapped into the KGM layer. All porous composite membranes owned some mechanical strength and the internal porosity over 90%, the mesopores and the macropores were ranged with 5–50 nm and 20–255 µm, respectively, which was satisfied for gas flowing and harmful substances adsorption. Aroma and resulting abundance of extracted constituents changed with timing, which equipped the membranes with a comprehensive aroma feeling. Among them, the membrane prepared with the raw material of dark plum showed a better comprehensive performance, especially it could significantly reduce the contents of harmful HCN and phenol in cigarette during smoking.

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Gold/Konjac glucomannan bionanocomposites for catalytic degradation of mono-azo and di-azo dyes

Cited by 25 publications

References 26 publications

Enhancing mechanical and antibacterial performances of organic cotton materials with greenly synthesized colored silver nanoparticles

Enhancing mechanical and antibacterial performances of organic cotton materials with greenly synthesized colored silver nanoparticles

Structure, Merits, Gel Formation, Gel Preparation and Functions of Konjac Glucomannan and Its Application in Aquatic Food Preservation

Preparation and Performance Research of Baking-Carbonized Functional Flavors/Konjac Glucomannan Porous Composite Membrane

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