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        Synthesis of new photocatalyst based on g-C3N4/N,P CQD/ZIF-67 nanocomposite for ciprofloxacin degradation under visible light irradiation

        Hakimeh Teymourinia,Hassan Abbas Alshamsi,Abbas Al-nayili,Esmail Sohouli,Mitra Gholami 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-

        Ciprofloxacin (CIP) is one of the most important antibiotics in pharmaceutical companies’ industrialdrains and causes environmental pollution. In this work, a new photocatalyst based on g-C3N4/N, PCQD/ZIF-67 was synthesized for CIP photocatalytic degradation. The synthesized sample was characterizedby field emission scanning electron microscopy, Fourier transform infrared spectrometer, and X-raypowder diffraction. Synthesized photocatalytic can degrade CIP as 98%. This degradation occurred in 90mins. The results showed OH and O2radicals have an important role in CIP degradation in pH = 6. Moreover, the bandgap evaluated for g-C3N4/N, P-CQD/ZIF-67 nanocomposite (1.3 eV) is less than g-C3N4 and g-C3N4/N,P CQD, which indicates the faster movement of electrons in the synthesized nanocomposite,so g-C3N4/N,P CQD/ZIF-67 nanocomposite has good application in CIP degradation. The products ofCIP degradation were analyzed by LC/MS-MS.

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        In situ synthesis NiO/F-MWCNTs nanocomposite for adsorption of malachite green dye from polluted water

        Alwan Salam Hussein,Alshamsi Hassan Abbas 한국탄소학회 2022 Carbon Letters Vol.32 No.4

        The presence of dyes in water is the most popular problem recently, so the current study was directed towards the synthesis of an effective material consisting of NiO and MWCNTs. The NiO/F-MWCNTs nanocomposite was synthesized using a simple hydrothermal method after functionalization of MWCNTs using sulfuric acid and nitric acid and utilized as an efficient surface to adsorption of malachite green dye from polluted water. The nanocomposite sample was characterized using several techniques are X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), Field emission scanning electron microscopy (FESEM), High- resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) surface area analysis, Barrett-Joyner-Halenda (BJH) analysis and Energy dispersive X-ray (EDX). The analytical results showed that the prepared nanocomposite is of good crystalline nature with a particle size of 25.43 nm. A significant specific surface area was 412.08 m2/g which indicates the effective impact of the nanocomposite in the adsorption of malachite green (MG) dye. On the other hand, the effect of adsorbent dose, temperature, acidic function and contact time on the adsorption efficiency of dye was studied. The kinetics of dye adsorption were also investigated employing two kinetic models, pseudo-first-order model and pseudo-second-order model. Finally, the thermodynamic functions were determined to identify the type of the reaction and the spontaneity of the process.

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