Surface charge on chitosan/cellulose nanowhiskers composite via functionalized and untreated carbon nanotube

Thou, Chin Zhen; Khan, Fahad; Mubarak, Nabisab Mujawar; Ahmad, Awais; Khalid, Mohammad; Jagadish, Priyanka; Walvekar, Rashmi; Abdullah, Ezzat Chan; Khan, Safia; Khan, Mariam; Hussain, Shahid; Ahmad, Awais; AlGarni, Tahani Saad

doi:10.1016/j.arabjc.2021.103022

Cited by 37 publications

(15 citation statements)

References 45 publications

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“…The study also showed that the composites experienced a significant improvement in thermal stability by delaying the degradation time. Cobos et al [ 131 ] synthesized chitosan/graphene (CS/GS) nanocomposites and evaluated their thermal and mechanical properties. CS/GS nanocomposites showed an enhancement in mechanical and thermal properties when compared with native chitosan.…”

Section: Chitosan-blend Compositesmentioning

confidence: 99%

Natural-Fiber-Reinforced Chitosan, Chitosan Blends and Their Nanocomposites for Various Advanced Applications

et al. 2022

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There has been much effort to provide eco-friendly and biodegradable materials for the next generation of composite products owing to global environmental concerns and increased awareness of renewable green resources. This review article uniquely highlights the use of green composites from natural fiber, particularly with regard to the development and characterization of chitosan, natural-fiber-reinforced chitosan biopolymer, chitosan blends, and chitosan nanocomposites. Natural fiber composites have a number of advantages such as durability, low cost, low weight, high specific strength, non-abrasiveness, equitably good mechanical properties, environmental friendliness, and biodegradability. Findings revealed that chitosan is a natural fiber that falls to the animal fiber category. As it has a biomaterial form, chitosan can be presented as hydrogels, sponges, film, and porous membrane. There are different processing methods in the preparation of chitosan composites such as solution and solvent casting, dipping and spray coating, freeze casting and drying, layer-by-layer preparation, and extrusion. It was also reported that the developed chitosan-based composites possess high thermal stability, as well as good chemical and physical properties. In these regards, chitosan-based “green” composites have wide applicability and potential in the industry of biomedicine, cosmetology, papermaking, wastewater treatment, agriculture, and pharmaceuticals.

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Section: Chitosan-blend Compositesmentioning

confidence: 99%

Natural-Fiber-Reinforced Chitosan, Chitosan Blends and Their Nanocomposites for Various Advanced Applications

et al. 2022

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“…Furthermore, catalyst support materials exhibit great influence on the cost, performance, and durability of polymer electrolyte membrane (PEM) fuel cells. Due to high chemical/electrochemical stability, surface area and versatility, the high surface area metal oxides including alumina (γ-Al 2 O 3 ), silica (SiO 2 ), titania (TiO 2 ) and zirconia (ZrO 2 ) are considered as better catalyst supports than conventional carbon materials [29][30][31][32]. Besides, multiple types of transition alumina are recurrently used as supports for developing heterogeneous catalysts which consist of an active phase dispersed on a carrier or support.…”

Section: Introductionmentioning

confidence: 99%

Electro-Oxidation of Ammonia over Copper Oxide Impregnated γ-Al2O3 Nanocatalysts

et al. 2021

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Ammonia electro-oxidation (AEO) is a zero carbon-emitting sustainable means for the generation of hydrogen fuel, but its commercialization is deterred due to sluggish reaction kinetics and the poisoning of expensive metal electrocatalysts. With this perspective, CuO impregnated γ-Al2O3 (CuO/γ-Al2O3) hybrid materials were synthesized as effective and affordable electrocatalysts and investigated for AEO in alkaline media. Structural investigations were performed via different characterization techniques, i.e., X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS). The morphology of γ-Al2O3 support as interconnected porous structures rendered the CuO/γ-Al2O3 nanocatalysts with robust activity. The additional CuO impregnation resulted in the enhanced electrochemical active surface area (ECSAs) and diffusion coefficient and spiked the electrocatalytic performance for NH3 electrolysis. Owing to good values of diffusion coefficient for AEO, low bandgap, and availability of ample ECSA at higher CuO to γ-Al2O3 ratio, these proposed electrocatalysts were proved to be effective in AEO. Due to good reproducibility, electrochemical stability, and higher activity for ammonia electro-oxidation, CuO/γ-Al2O3 nanomaterials are proposed as efficient promoters, electrode materials, or catalysts in ammonia electrocatalysis.

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“…The spectra were recorded using a Nicolet 5PC, Nicolet Analytical Instrument (Protea, Cambridgeshire, UK) that works in the frequency range of 4000-400 cm −1 . The transmittance at 3095.27 cm −1 appeared to be due to the presence of the hydroxyl group and C-H group stretching present in beta-amyrin and cholesterol in the gazania extract [43]; the value at 1662.63 cm −1 is due to N-H bending by alkaloids containing amino groups also present in the gazania extract. Additionally, carboxylic acid (-COOH), existing on the boundaries of Cu-Ni BNPs, displays a peak at 859.15 cm −1 ; the peak at 1054.51 cm −1 indicates the C-O-C attached to BNPs [39], while the peak appearing at 602.95 cm −1 is possibly associated with metal-carbon linkage [44].…”

Section: Ftir Analysis Of Cu-ni Bnpsmentioning

confidence: 95%

Antioxidant and Organic Dye Removal Potential of Cu-Ni Bimetallic Nanoparticles Synthesized Using Gazania rigens Extract

Younas

Gulzar

Ali

et al. 2021

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Copper-nickel bimetallic nanoparticles (Cu-Ni BNPs) were fabricated using an eco-friendly green method of synthesis. An extract of synthesized Gazania rigens was used for the synthesis of BNPs followed by characterization employing different techniques including UV/Vis spectrophotometer, FTIR, XRD, and SEM. Spectrophotometric studies (UV-Vis and FTIR) confirmed the formation of bimetallic nanoparticles. The SEM studies indicated that the particle size ranged from 50 to 100 nm. Analysis of the BNPs by the XRD technique confirmed the presence of both Cu and Ni crystal structure. The synthesized nanoparticles were then tested for their catalytic potential for photoreduction of methylene blue dye in an aqueous medium and DPPH radical scavenging in a methanol medium. The BNPs were found to be efficient in the reduction of methylene blue dye as well as the scavenging of DPPH free radicals such that the MB dye was completely degraded in just 17 min at the maximum absorption of 660 nm. Therefore, it is concluded that Cu-Ni BNPs can be successfully synthesized using Gazania rigens extract with suitable size and potent catalytic and radical scavenging activities.

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Surface charge on chitosan/cellulose nanowhiskers composite via functionalized and untreated carbon nanotube

Cited by 37 publications

References 45 publications

Natural-Fiber-Reinforced Chitosan, Chitosan Blends and Their Nanocomposites for Various Advanced Applications

Natural-Fiber-Reinforced Chitosan, Chitosan Blends and Their Nanocomposites for Various Advanced Applications

Electro-Oxidation of Ammonia over Copper Oxide Impregnated γ-Al2O3 Nanocatalysts

Antioxidant and Organic Dye Removal Potential of Cu-Ni Bimetallic Nanoparticles Synthesized Using Gazania rigens Extract

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