Figure 5.
The image depicts a graph showing transmittance on the vertical axis labelled as "Transmittance: a.u." and wavenumber on the horizontal axis labelled as "Wavenumber: cm?", ranging from four thousand to four hundred. Three curves illustrate the transmittance of M n O 2 at different concentrations: 0.1, represented by a black line, 0.3%, represented by a red line, and 0.5%, represented by a blue line. The graph presents peaks and troughs corresponding to these concentrations, with specific points of interest at approximately two thousand nine hundred thirty-seven, one thousand six hundred thirty-six, nine hundred ninety, and four hundred forty-three. The data layout shows a clear distinction between the three concentration curves, enabling comparison across the specified wavenumber range.FTIR of geopolymers containing various ratios of MnO2 nanofibres