STRUCTURAL, MORPHOLOGICAL AND OPTICAL PERFORMANCE OF SYNTHESIZED Co, Mn/ZnO NANOCOMPOSITES

Abstract

The pure Zinc Oxide, Cobalt doped Zinc Oxide and Manganese doped Zinc oxide nanoparticles were synthesized using Co-precipitation method. This work aims to study the effect of doping on the structural, morphological, and optical properties of the synthesized pure and doped ZnO nanoparticles. The structural and morphological change of the nanoparticles were examined by using X-ray Diffraction analysis (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The elemental analysis was studied with Energy Dispersive X-ray analysis (EDAX). The optical property of the particles were analysed using UV-Visible Spectroscopy (UV) and Photoluminescence Spectroscopy (PL). The XRD results shows all the nanoparticles are crystalline and pure in nature. The doping effect found to decrease the particle size of the ZnO nanoparticles. The SEM images also show the doping has significant change on the morphology of the ZnO nanoparticles. The functional groups present in the nanoparticles were confirmed using Fourier Transform Infrared Spectroscopy. The optical property of UV-Vis spectrum shows red shift and the band gap also found to decrease for doped nanoparticles. The presence of dopants in the nanoparticles was confirmed with the EDAX spectrum. The results of above characterization techniques confirmed the doping has significant influence on the structure, morphology, and optical property of the ZnO nanoparticles.

Interfacing poly(p-anisidine) with photosystem I for the fabrication of photoactive composite films

“…5a at a 2 μm scale shows agglomerated globular structures, irregular pores, and a non-uniform surface, all in accordance with a previously reported morphology for polyaniline and its derivatives. 35,48 The presence of both elongated needles and globular morphologies in the polymer films has been reported by Rodrigues de Oliveira et al to be consistent with the C–N bonds forming during polymerization at the carbon in the ortho position of the repeating structure. Thus, the polymer morphology from Fig.…”

“…34,42 PPA-specific bonds are identified at 1490 cm −1 and 1560 cm −1 for CC benzenoid and CC quinoid, respectively, with these bonds only appearing when repeat units are present. 34,35 The ratio of the quinoid and benzenoid in the polymer reveals a comparable ubiquity of these bonds in the polymer backbone.…”

“…32,33 The efforts of Rathidevi et al and Rodrigues de Oliveira et al are noteworthy, as they focused on the pristine polymer's oxidative chemical synthesis and characterization. 34,35 While Rathidevi et al mainly targeted a PPA-ZnO nanocomposite, they reported multiple characterization techniques for the polymer itself, whereas Rodrigues de Oliveira et al examined the polymer's morphology, conductivity, and crystalline structure by considering the effect of varying concentrations of oxidant (ammonium persulfate) and dopant (HCl) on the resulting crystalline structure of PPA via chemical oxidation of p-anisidine. Rodrigues de Oliveira et al reported that the chemical synthesis yielded a mixture of polymer structures, with varying proportions based on the synthesis conditions, where the C-N bonds that form during polymerization occur at the carbon either in the ortho or in the meta position of the repeating structure.…”

Green synthesis of Cu‐Mn co‐incorporated ZnO nanoparticles for antibacterial and photocatalytic applications

“…FTIR spectrum of Cu‐incorporated ZnO NPs was comparable to the ZnO NPs except for the weak vibrational peak at 574 cm −1 , representing a CuO bond (Deepak et al, 2019; Samavati et al, 2016). In Mn‐incorporated ZnO NPs, a bending vibration peak appeared at 640 cm −1 , belonging to the MnO bond (Kayani et al, 2020; Rathidevi et al, 2020). While in the Cu‐Mn co‐incorporated ZnO NPs, the vibration peaks at 640 and 580 cm −1 correspond to the Mn and Cu in the ZnO lattice (Aydin et al, 2019).…”

Synthesis and Characterization of Flower-Like Cobalt-Doped ZnO Nanostructures for Ammonia Sensing Applications

“…Additionally, the peak at 2350 cm −1 indicates the presence of CO 2 molecules in the air, which are trapped by the nanoparticles during the FTIR measurement. 51 The peaks at 3670 cm −1 and 3785 cm −1 represent the stretching modes of O-H bonds, indicating the presence of hydroxyl groups in the samples. 46,52 Optical characteristics.-The optical characteristics of pure and CZO nanoparticles were investigated by UV-DRS.…”