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A High Efficient Photodegradation UiO-66/Cr/PANI Nanoparticles Under Visible Light
A. Almalki And A. A. Elamin and Y. H. Elbashar
In our study, the focus was on the photocatalytic performance due to its important applications. All the chemicals used were of high purity and commercial grade without the need for purification. The thermal solvent method was used to prepare UiO-66. The UiO-66/g-Cr/PANI composite was synthesized by combining ZrCl4, BDC, and H2CrO4. The resulting UiO-66/g-Cr catalysts were identified as UiO-66, UiO-66/g-Cr-10%, UiO-66/g-Cr-20%, UiO-66/g-Cr-30%, and UiO-66/g-Cr-40%, according to the weight percentages of g-Cr: 0 wt%, 10 wt%, 20 wt%, 30 wt%, and 40 wt%, respectively. The compound was identified by X-ray diffraction analysis, which was found to be consistent with the standard card known for this compound, and the study proved that the absorption of UiO-66/Cr samples was in the visible light range with band gap energies ranging from 2.13 to 2.88 eV. The synthesized UiO-66/g-Cr compounds showed highly efficient degradation of DMNP with a short half-life (t1/2 of 2.17 min) at pH 7 under visible light irradiation. The absorption effect and degradation efficiency of pure U-66 oxide is 56.98% while that of U-66/g- Cr-40% is 61.58% within 150 min under UV light. It can be said that the addition of chromium, even in a small proportion, greatly improved the degradation efficiency in the photocatalytic stage.
Keywords: U-66/Cr oxide, photoabsorption property, photocatalytic performance