Rapid Gelling of Guar Gum Hydrogel Stabilized by Copper Hydroxide Nanoclusters for Efficient Removal of Heavy Metal and Supercapacitors

Abstract

In this paper, guar gum (GG) hydrogel has been successfully prepared by adding GG and Cu2+ mixture into an alkaline medium. The formation mechanism of the hydrogel has been investigated through various techniques. Results reveal GG facilitates the formation of ultrafine copper hydroxide clusters with a diameter of ∼3 nm. Moreover, these nanoclusters bring about a rapid gelling of GG within 10 ms. The synthesized hydrogel is applied to the adsorption of heavy metal ions from wastewater. The hydrogel shows excellent removal efficiency in removing various heavy metal ions. Besides, the hydrogel derived porous carbon exhibits high specific capacitance (281 F/g at 1 A/g) and excellent rate capacity. The high contaminant removal efficiency character and excellent electrochemical performance endow GG hydrogel with potential applications in the environmental and energy storage field.

Eco-friendly and sustainable basil seed hydrogel-loaded copper hydroxide-based catalyst for the synthesis of propargylamines and tetrazoles

“…The composition of basil seed's polysaccharide structure involves a tetramer, with 15 : 12 : 9 : 7 ratios of xylose (Xyl), galacturonic acid (Gala), arabinose (Ara), and rhamnose (Rha). 38 When basil seeds come into contact with water, their outer layer absorbs water molecules, leading to swelling. Copper ions (Cu) are captured within the mucilage layer of basil seeds due to interactions with the hydroxyl functional groups.…”

“…Notably, in the FT-IR spectra of Cu(OH) 2 -BSH, a new band appears in the 454 cm −1 region, which is attributed to the incorporation of the Cu-O bond into the structure of the fabricated catalyst. 38 Bands at 464.81 cm −1 and 420.45 cm −1 are indicative of the IR active modes for Cu(OH) 2 . 43 Raman spectroscopy, a suitable technique for investigating the interactions that lead to the formation of hybrid hydrogelnanoparticle materials, focuses on analyzing the vibrational energy of molecules.…”

Utilization of the nickel hydroxide derived from a spent electroless nickel plating bath for energy storage applications

“…The capacitive performance of b-Ni(OH) 2 reported in this work is comparable to nickel hydroxide obtained by precipitation and hydrothermal methods 61,62 and other transition metal hydroxides of Mn and Cu. 63,64…”

Plant Polysaccharides in Engineered Pharmaceutical Gels

“…Mainly composed of D-mannopyranose unit, with various hydroxyl groups Usually involves slow gelling process time (low productivity) [35,36] Hydrogel innovation and development are directly allied with characterization analyses, to investigate several factors, including chemical composition and behavior, thermal and mechanical properties, among others. Therefore, conventional assays for the hydrogels' characterization consist of analyses of spectroscopy-Fourier-transform infrared spectroscopy (FTIR-chemical bonds and functions), diffractometry-X-ray (XRD-degree of crystallinity), microscopy-scanning electron (SEM-surface morphology), atomic force (position of the chemical bond functions), thermal-differential scanning calorimetry (DSCmaterial transitions by variation of temperature and time), thermogravimetry (mass variation for temperature increase), mechanical-(universal test-Young modulus), water swelling (quantification of water intakes), and sol-gel (hydrogel crosslinks) [37,38].…”