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Chemically Modified Cellulose Capped Zinc Oxide Nanocomposite: Spectral and Optical Properties

R. Jagadeeswari P. Selvakumar V. Jeevanantham R. Saravanan
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 911-915 | DOI: 10.24425/amm.2021.136397
Keywords Chemically modified cellulose Hydrothermal XRD Surface morphology effective mass approximation
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Abstract

In this study, a new chemically modified cellulose polymer-capped ZnO nanopowder prepared by hydrothermal method using chemically modified cellulose polymer as capping agent was successfully reported. The structural characteristics of CMC-capped ZnO nanopowder was reported by FTIR, XRD, SEM and EDX studies. XRD results revealed crystallographic properties like crystal composition, phase purity and crystallite size of the prepared CMC-capped ZnO nanopowder and average size calculated by Debye Scherrer formula as 14.66 nm. EDX studies revealed that the presence of elemental compositions of capping agent in the nanopowder samples. The optical characterization of the CMC-capped ZnO nanopowder was studied using UV absorption (λmax = 303 nm) and PL spectroscopy (λex = 295 nm). The average crystal diameter and grain size were calculated by effective mass approximation formula and compared with XRD findings that agreed well and verified CMC capped ZnO with particle size of 193 nm. Thus, the promising optical characteristics shown by the synthesized CMC capped ZnO nanopowders exposes its potential usage in bio-medical fields.
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Authors and Affiliations

R. Jagadeeswari
1
P. Selvakumar
2
ORCID: ORCID
V. Jeevanantham
2
ORCID: ORCID
R. Saravanan
1
  1. Department of Chemistry, KPR Institute of Engineering And Technology, Coimbatore-641407, Tamilnadu, India
  2. Department of Chemistry, Vivekanandha College of Arts And Sciences for Women, Tiruchengode-637205, Tamilnadu, India

Pseudocapacitive Characteristics of Mg Doped ZnO Nanospheres Prepared by Coprecipitation

S. Arul T. Senthilnathan V. Jeevanantham K.V. Satheesh Kumar
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 4 | 1141-1148 | DOI: 10.24425/amm.2021.136434
Keywords Zinc oxide Mg-doped ZnO Coprecipitation cyclic voltammetry EIS
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Abstract

A n-type semiconductor ZnO has high transmittance features, excellent chemical stability and electrical properties. It is also commonly used in a range of fields, such as gas sensors, photocatalysts, optoelectronics, and solar photocell. Magnesium-doped zinc oxide (Mg-ZnO) nano powders were effectively produced using a basic chemical precipitation process at 45°C. Calcined Mg-ZnO nano powders have been characterized by FTIR, XRD, SEM-EDX and PL studies. XRD measurements from Mg-ZnO revealed development of a crystalline structure with an average particle size of 85 nm and SEM analysis confirmed the spherical morphology. Electrochemical property of produced Mg-ZnO nanoparticles was analyzed and the specific capacitance value of 729 F g–1 at 0.5 A g–1 current density was recorded and retained a specific capacitance ~100 percent at 2 A g–1 current density.
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Authors and Affiliations

S. Arul
1
ORCID: ORCID
T. Senthilnathan
2
ORCID: ORCID
V. Jeevanantham
3
ORCID: ORCID
K.V. Satheesh Kumar
4
ORCID: ORCID
  1. Jai Shriram Engineering College, Department of Physics, Tirupur-638660, Tamilnadu, India
  2. Sri Venkateshwara College of Engineering, Department of Applied Physics, Sriperumbudur-602117, Tamilnadu, India
  3. Vivekanandha College of Arts & Sciences for Women, Department of Chemistry, Tiruchengode 637205, Tamilnadu, India
  4. Kongu Engineering College, Department of Mechanical Engineering, Erode-638060, Tamilnadu, India

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