We present the structural characterization of several sets of minerals: a) natural clinoptilolite (ZNM), b) ZNM subjected to grinding for three hours (ZNM025), c) ZNM025 calcined at 250 °C (ZNM250) and d) ZNM025 treated at 500 °C (ZNM500), X-ray diffraction (XRD) technique was used to determine what the changes were. On the other hand, the aforementioned samples were used to carry out the degradation of the Reactive Black 5 (RB5) textile dye, relying on a photocatalytic process. The effects of calcinations at 250 °C and 500°C on the materials, according to the diffraction patterns are: i) increase in the amorphous phase; ii) positive or negative shift (compared to ZNM025), of the diffraction peaks of ZNM250 and ZNM500; iii) decrease in particle size, according to the Debye-Scherrer model; iv) absence of diffraction peaks of Iron Oxide (FeOx) particles.In addition, we have found that the sample set can photocatalytically mineralize the RB5 dye. The degree of mineralization was verified through the decrease in the height of the absorption band of the UV-Vis spectrum (λ = 600 nm), which corresponds to the azo bond (-N=N-) of the chemical structure of the compound. organic (RB5). Finally, the following dye degradation order was established, ZNM025 < ZNM250 < ZNM500, indicating that the heat treatment at 500 °C of natural clinoptilolite improves the catalytic properties and allows for better RB5 degradation efficiencies.
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