Novel zinc-2,6- dimethoxybenzoic acid complex as useful precursor for the synthesis of MWCNTs-ZnO nano-inorganic composite

The production of nanomaterials from new sources is an important topic because the diversity of the raw materials provides a variety of properties for these materials, therefore, this study involved the synthesis and characterization of a zinc complex obtained by reacting 2,6-dimethoxybenzoic acid (DMB) with zinc chloride in the presence of triethylamine as a bulk base. The structure and coordination mode of the resulting zinc complex were determined through various techniques, including FTIR, 1H NMR, elemental analysis, and molar conductivity. The findings confirmed that the 2,6-dimethoxybenzoic acid ligand acts as a bidentate ligand, coordinating through both oxygen atoms of the carboxylic group, resulting in a complex of the type [Zn(DMB)Cl]2. This complex was then used as a precursor for the synthesis of a ZnO-MWCNTs nanocomposite using ultrasound waves. The synthesized nanocomposite was characterized using SEM and XRD techniques. The results revealed the formation of small spherical clusters around the carbon nanotubes, with an average size of the spherical nanostructures measuring 11.875 nm. Moreover, the incorporation of zinc oxide nanoparticles had a positive impact on increasing the diameter of the carbon nanotubes from 3.005 nm to 21.218 nm

Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites

This research included studying and preparing the complex [Zn(DMB)Cl]2 from the reaction 1 M ratio of 2,6-dimethoxybenzoic acid ligand (DMB) with one molar ratio of aqueous zinc chloride in the presence of triethylamine. This complex was diagnosed by several techniques including FT-IR, 1H NMR, elemental analysis and molar conductivity. The MWCNTS-ZnO composite was prepared by reacting the complex [Zn(DMB)Cl]2 with carbon nanotubes using an ultrasound device. The novelty of this work is mainly based on the use of zinc acetate and [Zn(DMB)Cl]2 in the preparation of MWCNTS-ZnO(acetate) and MWCNTS-ZnO(complex) nanocomposites, respectively, in order to determine the importance of raw materials and their effects on the ability to store hydrogen. Thereafter, hydrogen storage was measured as a prospective study of the MWCNTS-ZnO composites. The study proves that the maximum H2 storage was 4.3 wt% H2 using MWCNTS-ZnO(complex) at a pressure of 85 bar and a temperature of 77 K. Therefore, the kinetic and thermodynamic calculations were made for this composite to complete the study. The enthalpy value was 0.8771 KJ/(mol H2), the entropy value was 4.7029 (J/mol H2.K), and the separation factor RF was 0.168148. However, the adsorption process was compatible with the pseudo-second order reaction with a value of R2 = 0.9341. Moreover, the measurement shows that the nanocomposite has the ability to reach the highest storage value in only 30 s at a pressure of 85 bar

Fabrication and Characterization of Polyphenylsulfone/Titanium Oxide Nanocomposite Membranes for Oily Wastewater Treatment

Polyphenylsulfone (PPSU) membranes are critical for numerous applications, including water treatment, oil separation, energy production, electronic manufacturing, and biomedicine because of their low cost; regulated crystallinity; and chemical, thermal, and mechanical stability. Numerous studies have shown that altering the surface characteristics of PPSU membranes affects their stability and functionality. Nanocomposite membranes of PPSU (P0), PPSU-1%TiO2 (P1), and PPSU-2% TiO2 (P2) were prepared using the phase inversion method. Scanning electron microscopy and thermal analysis were performed to determine the contact angle and mechanical integrity of the proposed membranes. The results showed that the membranes contained channels of different diameters extending between 1.8 μm and 10.3 μm, which made them useful in removing oil. Thermal measurements showed that all of the PPSU membranes were stable at a temperature of not less than 240 °C, and had good mechanical properties, including tensile strength of 7.92 MPa and elongation of 0.217%. These properties enabled them to function in a harsh thermal environment. The experimental results of oil and water separation and BSA solution fouling on membrane P2 showed a 92.95% rejection rate and a flux recovery ratio of 82.56%, respectively, compared to P0 and P1