Comprehensive preparation and catalytic activities of Co/TEMPO-cellulose nanocomposites: A promising green catalyst

Idrissi, Nouaamane El; Belachemi, Larbi; Merle, Nicolas; Zinck, Philippe; Kaddami, Hamid

doi:10.1016/j.carbpol.2022.119765

Cited by 8 publications

(3 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the N1s spectrum displayed in Figure 8E reveals the presence of an absorption band at 397 eV, which can be assigned to the secondary amine (-NH) group [84,85]. According to the previous reports [24,86] the core level spectrum of Co2p Figure 8D suggests the existence of Co0 by allocating to a couple of peaks of Co 2p3/2 and Co 2p1/2 at 778 eV and 794 eV, respectively. The XPS results indicate the successful synthesis of the Co@DAC-OAP catalyst.…”

Section: Structural and Morphological Characterizationsupporting

confidence: 60%

“…Regarding native cellulose as support for metal particle catalysts, the relatively weak interactions between the surface and the particles cannot totally prevent catalyst deactivation by sintering and it is why research efforts have focused on cellulose modification. Fortunately, there are a plethora of modification methods to improve its performance for specific applications, such as crosslinking [15,16], grafting of polymer [17][18][19][20], enzymatic modification [21], chemical and physical modification [22,23], and TEMPO oxidation [24]. The process of periodate oxidation that transforms the 2,3-dihydroxyl groups into 2,3-dialdehyde groups through a selective cleavage of the C2 and C3 vicinal hydroxyl groups [25,26] is an example of such modifications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Schiff Base Functionalized Cellulose: Towards Strong Support-Cobalt Nanoparticles Interactions for High Catalytic Performances

Aitbella,

Belachemi,

Merle

et al. 2024

Molecules

Self Cite

View full text Add to dashboard Cite

A new hybrid catalyst consisting of cobalt nanoparticles immobilized onto cellulose was developed. The cellulosic matrix is derived from date palm biomass waste, which was oxidized by sodium periodate to yield dialdehyde and was further derivatized by grafting orthoaminophenol as a metal ion complexing agent. The new hybrid catalyst was characterized by FT-IR, solid-state NMR, XRD, SEM, TEM, ICP, and XPS. The catalytic potential of the nanocatalyst was then evaluated in the catalytic hydrogenation of 4-nitrophenol to 4-aminophenol under mild experimental conditions in aqueous medium in the presence of NaBH4 at room temperature. The reaction achieved complete conversion within a short period of 7 min. The rate constant was calculated to be K = 8.7 × 10−3 s−1. The catalyst was recycled for eight cycles. Furthermore, we explored the application of the same catalyst for the hydrogenation of cinnamaldehyde using dihydrogen under different reaction conditions. The results obtained were highly promising, exhibiting both high conversion and excellent selectivity in cinnamyl alcohol.

show abstract

Section: Structural and Morphological Characterizationsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Schiff Base Functionalized Cellulose: Towards Strong Support-Cobalt Nanoparticles Interactions for High Catalytic Performances

Aitbella,

Belachemi,

Merle

et al. 2024

Molecules

Self Cite

View full text Add to dashboard Cite

show abstract

“…Different types of cellulose were used as supports for catalysts for hydrogenation, oxidation, dye reduction, coupling reactions [3,4,35,[40][41][42][43]. Bearing abundant reactive -OH groups on its chains, HEC can acts as both reducing agent for transition metal ions and stabilizing agent for metal nanoparticles formed.…”

Section: Introductionmentioning

confidence: 99%

Polysaccharide-Stabilized Pd-Ag Nanocatalysts for Hydrogenation of 2-Hexyn-1-Ol

Zharmagambetova,

Talgatov,

Auyezkhanova

et al. 2023

Preprint

View full text Add to dashboard Cite

A new one-pot technique for preparation of polysaccharide-based Pd- and Pd-Ag nanocatalysts by sequential supporting natural polymer (2-hydroxyethyl cellulose (HEC), chitosan (Chit), pectin (Pec)) and metals on zinc oxide was developed. The nanocatalysts based on polysaccharide were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), infrared spectroscopy (IRS), X-ray powder diffraction (XRD), X-ray photoelectron spectra (XPS) and elemental analysis methods. The catalyst characterization results indicated complete adsorption of polysaccharide and metal ions on zinc oxide, forming polymer-stabilized Pd nanoparticles of ~2 nm in size, evenly distributed on the support surface. The catalysts were studied in the hydrogenation of 2-hexyn-1-ol under mild conditions (0.1 MPa, 40 °C). The catalysts demonstrated nearly the same conversion of 2-hexyn-1-ol. The selectivity to cis-hexen-1-ol of the catalysts decreases in the following order: 0.5%Pd-Ag(3:1)HEC/ZnO>0.5%Pd-Ag(3:1)Pec/ZnO>0.5%Pd-Ag(3:1)Chit/ZnO. The optimum reaction temperature and catalyst loading for the Pd-Ag catalysts modified with HEC and Chit have been determined (40 °C, 0.05 g).

show abstract

Biomimetic highly porous nanocellulose–nanohydroxyapatite scaffolds for bone tissue engineering

Korkeamäki,

Rashad,

Berstad

et al. 2024

Cellulose

View full text Add to dashboard Cite

Wood-derived TEMPO-oxidized cellulose nanofibrils (CNFs) have potential as scaffolding for bone tissue engineering. Although biocompatible, the material lacks osteoconductive and appropriate mechanical properties. Incorporation of nano-hydroxyapatite (nHA) and modification of scaffold preparation methods could improve applicability. In this study, freeze-dried porous scaffolds were prepared using a range of nHA (0, 20, 33, 50%) and CNF compositions. Not only the microarchitecture but also the chemical composition of the scaffolds was studied. Osteoblast-like osteosarcoma derived cells (Saos-2) were cultured on the scaffolds and their responses (viability, attachment, proliferation, and osteogenic phenotype) to the different scaffolds were documented. The results show that incorporation of nHA influenced the microarchitecture, mechanical stiffness and surface properties of the scaffolds. Moreover, biological characterization demonstrated good cell viability in all the groups. However, the increase of nHA concentration beyond 20% does not offer further advantages. It is concluded that the incorporation of 20% nHA resulted in the widest and most biomimetic pore size distribution, increased surface roughness and improved protein adsorption. These changes in material properties enhanced cell spreading and the osteogenic gene expression of osteoblast-like cells seeded on the scaffolds. Moreover, 20% nHA warrants further investigation as a potential scaffolding material for bone tissue engineering. Graphical abstract

show abstract

Comprehensive preparation and catalytic activities of Co/TEMPO-cellulose nanocomposites: A promising green catalyst

Cited by 8 publications

References 67 publications

Schiff Base Functionalized Cellulose: Towards Strong Support-Cobalt Nanoparticles Interactions for High Catalytic Performances

Schiff Base Functionalized Cellulose: Towards Strong Support-Cobalt Nanoparticles Interactions for High Catalytic Performances

Polysaccharide-Stabilized Pd-Ag Nanocatalysts for Hydrogenation of 2-Hexyn-1-Ol

Biomimetic highly porous nanocellulose–nanohydroxyapatite scaffolds for bone tissue engineering

Contact Info

Product

Resources

About