Cu₂O Nanoparticles Anchored on Amine-Functionalized Graphite Nanosheet: A Potential Reusable Catalyst

Abstract

Synthesis of Cu2O-amine-functionalized graphite nanosheet (AFGNS) composite has been accomplished at room temperature. In the first step, AFGNS is synthesized by wet chemical functionalization where the -NH2 groups formed on nanosheet surface help to anchor the Cu(2+) ions homogeneously through coordinate bonds. Reduction of Cu(2+) (3.4 × 10(-2) mmol) in the presence of NaBH4 (1.8 mmol) can be restricted to Cu(1+) on AFGNS surface at room temperature. This leads to the formation of uniform Cu2O nanoparticles (NP) on AFGNS. The role played by the -NH2 groups in anchoring Cu(2+) ions and followed by stabilizing the Cu2O NP on AFGNS was understood by controlled reactions in the absence of -NH2 groups and without any graphitic support, respectively. The prepared Cu2O-AFGNS composite shows excellent catalytic activity toward degradation of an azo dye, methyl orange, which is an environmental pollutant. The dye degradation proceeds with high rate constant value, and the composite shows high stability and excellent reuse capability.

Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation

“…Spectral fitting reveals that the surfaces of both hierarchical materials predominantly comprise Cu 2 O (Table S1) with that of the nanocomposite somewhat enriched (88 % versus 79 %). Corresponding C 1s XP spectra revealed almost identical distributions of three distinct chemical environments for both hierarchical materials at 284.6, 286.2, and 288.3 eV (Figure b), respectively assigned to the alcohol and ether functions of PEG and surface carbonate . A small increase in the sp 2 carbon environment was observed for the Cu 2 O/rGO nanocomposite consistent with graphene incorporation (Table S2) .…”

“…Indeed, graphite and rGO nanosheets have been explored as supports for dispersing Cu 2 O and TiO 2 respectively. Carbonaceous supports are reported to facilitate photoexcited charge separation, and hence improve the photocatalytic activity and photostability of Cu 2 O, while thin protective carbon layers arising from glucose carbonisation can significantly increase the photocurrent density and photostability of Cu 2 O for photoelectrochemical water splitting …”

Green Synthesis of Electrospun Porous Carbon Nanofibers from Sucrose and Doping of Ag Nanoparticle with Improved Electrical and Electrochemical Properties

“…Further, the graphitic carbon support can electronically interact with metal NPs thus improving the intrinsic property of the NPs. The synergistic effect of this interaction through transport of electrons between the two systems improves the electrical properties of the composites significantly and increases the electrical conductivity of the bulk materials as a whole …”

Hetero–nanostructured Ni/α‐Mn2O3 as Highly Active Catalyst for Aqueous Phase Reduction Reactions

“…Recently, reduction of dyes in presence of NaBH 4 is considered as an affordable, effective, environment friendly technology in removing such organic pollutants in solution . Moreover, it is reported that compared to parent dyes, its reductive products become inclined to biodegradation and mineralization, largely reducing the harm to the environment . Thus, there is a growing need for developing novel methods for the reduction of organic dyes …”

“…[38] Moreover, it is reported that compared to parent dyes, its reductive products become inclined to biodegradation and mineralization, largely reducing the harm to the environment. [39][40][41][42] Thus, there is a growing need for developing novel methods for the reduction of organic dyes. [37] Herein, hetero-nanostructured Ni/a-Mn 2 O 3 catalyst was synthesized via surfactant aided co-reduction method using CTAB (surfactant) as the stabilizer for the Ni nanoparticles and NaBH 4 as reducing agent.…”