Enhancement of photocatalytic efficacy by exploiting copper doping in nano-hydroxyapatite for degradation of Congo red dye

Abstract

Copper doping in hydroxyapatite crystals can easily breakdown the Congo red dye resulting non-toxic products.

FTIR spectrum analysis to predict the crystalline and amorphous phases of hydroxyapatite: a comparison of vibrational motion to reflection

“…The phase change occurs in Hap when temperature is changed from 700 to 900 °C which are described in the literature from XRD and DSC. 29,30 The XRD instrument are based on the reection from the crystal planes and peaks are well separated when amorphous phase is changed to crystalline phase. In the Fig.…”

Synthesis of different types of nano-hydroxyapatites for efficient photocatalytic degradation of textile dye (Congo red): a crystallographic characterization

“…For direct band gap analysis, the Tauc plot method was used, which is expressed in the mathematical eqn (24). 50,51 αhμ = A ( hθ − E g ) n where, h is Planck's constant, E g is the optical band gap. A is a constant, α is the absorption coefficient, μ is the photon frequency, as well as n = 1/2 for a direct band gap.…”

“…For direct band gap analysis, the Tauc plot method was used, which is expressed in the mathematical eqn (24). 50,51 ahm = A(hq…”

Fabrication and Characterization of a Bioscaffold Using Hydroxyapatite and Unsaturated Polyester Resin

“…Wet chemical synthesis of pure hydroxyapatite (HAp) has been performed by utilizing commercial calcium carbonate (CaCO 3 ) and orthophosphoric acid, H 3 PO 4 (85% w/w), with a Ca/P proportion of 1.67. Equal volumes of 1.0 M H 3 PO 4 solution and 1.67 M suspended CaCO 3 were utilized for the generation of HAp using DI water . Based on specified reaction parameters (pH-10, temperature −45 °C) and constant stirring, acid was slowly introduced to the suspended solution of calcium carbonate.…”