چكيده به لاتين
Energy problems are a fundamental concern in a global society that can be solved by replacing sustainable energies. In recent years, the design of nanomaterials as photocatalysts that can produce chemical energy using the infinite energy of sunlight has become a new solution for water purification. The photocatalytic process by heterogeneous structures has been widely considered a practical approach to address today's severe environmental pollution issues because it can destroy toxic and persistent organic compounds in water or air quickly and with an environmentally friendly approach.
In the first study, NiCo2O4@MOF-801 has synthesized with multiple properties, and then a novel three-layer NiCo2O4@MOF-801@MIL88A photocatalyst was successfully synthesized to improve the meropenem degradation, and Cr(VI) reduction. The prepared photocatalyst was characterized by XRD, IR, XPS, TEM, SEM, TGA, BET, EIS, PL, and UV–vis. According to the structural and optical analysis performed, the interaction between the components formed a heterojunction structure that prevented the recombination of the charge carriers and increased the photocatalytic performance. Photocatalytic simulation tests were also proved to reduce chromium and degrade antibiotics to find the optimal heterogeneous performance. As a result, NiCo2O4@MOF-801@MIL88A composite can completely reduce Cr(VI) in 45 minutes, which is strongly preferable to any pure component's performance. Overall, this work offers a low-cost but high-efficient material that can remove organic and inorganic contaminants from water.
In the second study, the structure of MOF-808/Bi-BDC was synthesized based on the composite of two metal-organic frameworks to reduce the energy gap of Bi-BDC. Then, due to the non-activity of the MOF-808/Bi-BDC composite in visible light, partial derivatization of the Bi-BDC metal-organic framework was done to improve light absorption by creating a third component (BiOBr). On the other hand, in the experiments, the presence of MOF-808 improved the photocatalytic activity of the Bi-BDC/BiOBr composite, which can be related to the creation of the Z-scheme mechanism and the complete separation of charge carriers. Finally, the photocatalytic performance of MOF-808/Bi-BDC/BiOBr is reported to investigate the application of Cr (VI) reduction to Cr(III) using visible light irradiation. A set of results obtained through IR, XRD, SEM, EIS, PL, and UV-Vis analyses showed that this composite has achieved superior properties compared to single components or separate binary composites, as well as good photocatalytic performance. It has been shown in the reduction of hexavalent chromium. To investigate this reaction more closely, the factors affecting the photocatalytic performance of chromium reduction were investigated in detail.
