Hybrids based on borate-functionalized cellulose nanofibers and noble-metal nanoparticles as sustainable catalysts for environmental applications

Abstract

We report the synthesis of supported noble metal nanoparticles on cellulose nanofibers cross-linked with borate as highly efficient sustainable catalysts.

Introduction of a trinuclear manganese(iii) catalyst on the surface of magnetic cellulose as an eco-benign, efficient and reusable novel heterogeneous catalyst for the multi-component synthesis of new derivatives of xanthene

“…Recently, magnetic nanoparticles (Fe 3 O 4 ) have received scientific attention due to their extraordinary performance, such as high super magnetic properties in the presence of an external magnetic field, etc. 29 The surface of magnetic nanoparticles has been used for biological and medical engineering due to its small size, good compatibility, low toxicity and good physical, and chemical stability such as magnetic resonance imaging, drug delivery, biosensors, cancer treatment with magnetic induced hyperthermia. 30 Howbeit magnetic nanoparticles can be separated from the reaction mixture by an external magnet, the removal of nanoparticles from the reaction mixture systems is very challenging.…”

On the mineralization of nanocellulose to produce functional hybrid materials

“…The study utilizes a laboratory-based SAXS instrument and could successfully provide evidence of the formation of the nanoparticles in the hybrid but does not provide kinetics of the growth. 128 In another study, the real-time growth of metal oxide nanoparticles has been followed in the matrix of nanocellulose (Fig. 4(b)).…”

“…The study utilizes a laboratory-based SAXS instrument and could successfully provide evidence of the formation of the nanoparticles in the hybrid but does not provide kinetics of the growth. 128 In another study, the real-time growth of metal oxide nanoparticles has been followed in the matrix of 49 (c) Various types of metal ions adsorbed on cellulose and GO sheets. The capturing action of the phosphate group towards Mg and Cr ions is shown on the right (fragments extracted from the complex structures).…”

Boron Adsorption Kinetics of Microcrystalline Cellulose and Polymer Resin

“…17−23 Molecular origins of such properties are related to the degree of boron cross-linking in cellulose polymers and the kinetics of boron adsorption, which enhances the mechanical strength of cellulose and facilitates self-healing capacity. As a result, boron-based functionalization of cellulose has been utilized in a wide range of research areas: nanocomposite hydrogels, 24,25 environmental remediation, 12,26,27 and actuators/sensors. 28,29 Because of its high natural abundance, low solubility in water and tendency to interact with borate anions, cellulose can be used as a low-cost sorbent for scalable boron removal technology.…”

“…Boric acid chemistry plays an important role in developing functional materials derived from lignocellulose polymers. − In particular, cellulose–borate interactions have been tailored to engineer wood composites, fabrics, textiles, and fire retardants by forming an impenetrable glass coating on the fire-exposed surface. − Molecular origins of such properties are related to the degree of boron cross-linking in cellulose polymers and the kinetics of boron adsorption, which enhances the mechanical strength of cellulose and facilitates self-healing capacity. As a result, boron-based functionalization of cellulose has been utilized in a wide range of research areas: nanocomposite hydrogels, , environmental remediation, ,, and actuators/sensors. , Because of its high natural abundance, low solubility in water and tendency to interact with borate anions, cellulose can be used as a low-cost sorbent for scalable boron removal technology . Among the boron removal technologies such as reverse osmosis, electrodialysis, and electrocoagulation, boron capture by ion exchange − is the most efficient approach, due to its high adsorption capacity, economic viability, and recyclability.…”