Fabrication of Zinc MOFs Using Room Temperature and Hydrothermal Approaches for Removal of Anionic Diazo Dye from Wastewater Mai S. El-Sayed, Islam M. El-Sewify, Mohamed F. El-Shahat, Ahmed Radwan Journal of Inorganic and Organometallic Polymers and Materials, 2025 The production of dyes with strong, sustainable colours produces a large amount of dye discharge in water, which is unfavourable for human and biological life. In this report, Zn-MOFs were prepared using room temperature and hydrothermal approaches for efficient removal of anionic diazo dye from wastewater. Our results confirm the significant crystalline and uniform structure morphology of the designed room temperature Zn-MOFs (RZM) and hydrothermal Zn-MOFs (HZM) adsorbents. To evaluate the ability of RZM and HZM adsorbents to adsorb Congo red (CR) from an aqueous solution, numerous adsorption parameters have been studied, such as adsorbent dose, temperature, pH, contact time, and initial concentration. RZM and HZM adsorbents have been employed to assess the kinetic, thermodynamic, and isotherm models for the adsorption of CR dye under optimum removal conditions. The RZM and HZM adsorbents exhibited fast adsorption rates towards CR at pH 7, and maximal adsorption capacity according to the Langmuir model reached 200 mg g–1 much higher value than that of other adsorbents that have been reported. The adsorption mechanisms of RZM and HZM adsorbents are based on π–π stacking and electrostatic interactions with multiple reusability. Our Zn-MOFs are synthesized using an easy, low-cost process enabling the use of affordable and easily accessible precursors. This renders the procedure cost feasible for extensive implementations. Zn-MOFs show excellent stability, with constant adsorption capabilities observed in several trials. Thorough evaluation in a range of environmental conditions has validated the repeatability of our results, assuring consistent performance. The RZM and HZM adsorbents provide an easy-to-use and efficient method for water purification as well as controlling industrial wastewater.
Effective adsorption of fluorescent congo red azo dye from aqueous solution by green synthesized nanosphere ZnO/CuO composite using propolis as bee byproduct extract Ahmed Radwan, Samir O. Mohamed, Mostafa M. H. Khalil, Islam M. El-Sewify Scientific Reports, 2024 The indirect dumping of massive volumes of toxic dyes into water has seriously affected the ecosystem. Owing to the many applications of the designed nanomaterials in the manufacturing process, there is a lot of research interest in synthesizing nanomaterials using green processes. In this research, the byproduct of bee was employed to synthesize nanoparticles (NPs) of ZnO, CuO, and biosynthesized ZnO/CuO (BZC) nanocomposite via utilizing a green and simple approach. To validate the effective fabrication of BZC nanocomposite, various characterization measurements were applied. FTIR analysis identified the functional groups in charge of producing nanoparticles and nanocomposites. Moreover, the existence of ZnO and CuO XRD peaks suggests that the nanocomposites were successfully biosynthesized. The high-resolution XPS spectrum of the BZC nanocomposite’s Zn2p3, Cu2p3, and O1s were observed. Our findings indicate the successful engineering of the prepared nanomaterials and BZC nanocomposite. Our findings indicate the successful engineering of the prepared nanomaterials and BZC nanocomposite. For Congo red (CR) fluorescent stain azo dye elimination in water, all adsorption parameters were examined at room temperature. Moreover, the adsorption experiments revealed the removal capacity for uptake CR dye using BZC nanocomposite (90.14 mg g−1). Our results show that the BZC nanocomposite exhibited high removal capability for the adsorption of CR dye. The nanosphere adsorbent offered a simple, low-cost, and green approach for water purification and industrial wastewater control.
Spiropyrans: molecules in motion Anastasia S. Kozlenko, Artem D. Pugachev, Ilya V. Ozhogin, Islam M. El-Sewify, Boris S. Lukyanov Chemistry of Heterocyclic Compounds, 2021
