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Synthesis, characterization of imidazole‐based copper complex mixtures and study of their thermal behaviour
Author(s) -
Aravind Rudrarapu,
Brahma Gouri Sankhar,
Swain Trilochan,
Sahu Akash Kumar
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6445
Subject(s) - differential scanning calorimetry , thermogravimetric analysis , thermal analysis , analytical chemistry (journal) , thermogravimetry , materials science , copper , fourier transform infrared spectroscopy , differential thermal analysis , chemistry , nuclear chemistry , chemical engineering , inorganic chemistry , organic chemistry , thermal , metallurgy , thermodynamics , physics , engineering , optics , diffraction
Summary Herein, the synthesis, characterization and thermal behaviour of imidazole‐based two copper‐phosphate mixtures, A = Cu 2 (PO 4 )(OH)·Cu(HPO 4 )(H 2 O)·(C 3 H 4 N 2 ) 2 .3.25 H 2 O and B = Cu 3 (PO 4 ) 2 H 2 O·(C 3 H 4 N 2 ) 3 (H 2 O)·0.1(C 3 H 4 N 2 ).3.25 H 2 O are reported. The characterization was done by adopting various electro‐analytical techniques such as elemental analysis, X‐ray Powder Diffraction (XRD), Thermogravimetric Analysis (TGA) and Derivative Thermogravimetry (DTG), Fourier Transform Infrared (FT‐IR) Spectrometry, Absorption Spectrophotometry and Ultraviolet‐Visible and near Infrared (UV‐Vis‐NIR). Differential Scanning Calorimetry performed with the heating rate 10 K/min from 297.96 to 770.46 K in normal atmosphere for both mixtures. DSC data indicated that both mixtures A and B are exhibiting exothermic property by their net specific heat capacities ( C p ) −11.11 and −2.83 J/g K, respectively. Therefore, these complex mixtures can be utilized as heat dissipation materials. Both mixtures A and B undergo phase change in terms of hydrated phase to dehydrated phase up to 356 and 392 K, respectively. The specific heat capacity of Mixture A during hydration, C p = 2.54 J/g K, is higher than the tin, lead, stainless steel, glass and aluminium at their respective melting points. This mixture is also found better than the commercial product based on lithium ion battery in terms of specific heat capacity. From UV‐Vis‐NIR analysis, it is found that the mixtures A and B are showing semiconducting behaviour with band gaps 1.66 and 1.68 eV, respectively. The average crystallite sizes of these nano‐complex mixtures are 35.29 and 30.94 nm and these were calculated using the Debye‐Scherrer equation and Williamson‐Hall method.