Multi-walled carbon nanotube-supported metal-doped ZnO nanoparticles and their photocatalytic property

Abstract

A simple and versatile approach has been developed to synthesize multi-walled carbon nanotubes/metal-doped ZnO nanohybrid materials (MWNT/M-doped ZnO) by means of the co-deposition method. The experimental results illuminate that MWNTs can be modified by metal-doped ZnO nanoparticles at 450 °C, such as Mn, Mg, and Co elements. Furthermore, the MWNT/Mg-doped ZnO hybrids have been proven to have a high photocatalytic ability for methyl orange (MO), in which the degraded rate for MO reaches 100 % in 60 min. The enhancement in photocatalytic activity is attributed to the excellent electriconal property of MWNTs and Mg-doping. The resultant MWNT/Mg-doped ZnO nanohybrids have potential applications in photocatalysis and environmental protection.

Liquid phase oxidation of cinnamyl alcohol to cinnamaldehyde using multiwall carbon nanotubes decorated with zinc-manganese oxide nanoparticles

“…Zinc (Zn) oxide nanomaterials have a promising role as a catalyst in oxidation of organic compounds due to high selectivity and stability, large excitation binding energy (60 meV) at room temperature, wide band gap (3.37 eV), low cost, and ecofriendly properties [18]. Zn oxide have been synthesized in a variety of shapes, however, it is well established that, doping a selective element into Zn is a primary method for controlling the properties such as band gap or electrical conductivity [19].…”

“…The catalyst showed high efficiency in term of productivity, high stability, and true heterogeneity, and thus can be vital for applications in oxidation of alcohols. with Zn oxide nanoparticles to investigate the photocatalytic activity obtained comparable diffraction peaks [18]. The crystallite size (D) of the nanoparticles were calculated from XRD pattern using Scherrer equation, D=Kλ/βcosθ, where K, λ, β, and θ, represent dimensionless shape factor with a value close to unity, x-ray wavelength, the line broadening at the half maximum intensity, and Bragg angle in degrees, respectively.…”

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

“…Because of their unique physical and chemical properties, carbon nanotubes (CNTs) are considered to be excellent candidates for many potential applications such as nanocomposite materials, nanoelectronics, catalysis and sensors [1][2][3][4][5][6][7][8][9][10]. Due to their great hardness and toughness, multiwall CNTs (MWCNTs) keep their morphology and structure even at high nanoparticle loadings [11].…”

Production of hybrid inorganic/carbon nanotube fillers via chemical vapor deposition for advanced polymer nanocomposites

“…Good conductivity helps in the efficient charge transport and increases the power density of these devices. The latest method in taking advantage of the defects in CNTs is by hybridizing the CNTs with other materials, especially metal atoms and particles (Chen et al, 2013). The foreign material is hybridized through doping into the defect of the CNT, by the attachment to the functional group of the "damaged" CNTs, or by implementation into the tubes of CNTs.…”