Publications by authors named "Saeed Saeed"

Article Synopsis
  • Hydrogen titanates (HTOs) are layered titanium oxides with an interlayer that holds water and protons, influencing lithium insertion during electrochemical processes.
  • The study employed various techniques like X-ray diffraction and mass spectroscopy to analyze how the interlayer chemistry affects the electrochemical responses of different HTOs (HTiO·HO with n = 3, 4, and 5).
  • Findings suggest that the first reduction reaction relates to the acidity of structural protons, leading to hydrogen gas production and the formation of a lithiated hydrogen titanate, impacting our understanding of electrochemical behaviors in materials with hydrogen and water.
View Article and Find Full Text PDF

An increase in textile resistance to antimicrobial agents has posed a pressing need for the development of new antimicrobials. Therefore, the antimicrobial characteristics of thiophene and pyridine acetohydrazide derivatives have been developed as novel textile-modified complexes exhibiting antibacterial agents. Synthesis and characterization of pyridyl-thienyl acetohydrazide derivative (AHZ) using NMR (C and H) and FTIR.

View Article and Find Full Text PDF

Understanding the deformation of energy storage electrodes at a local scale and its correlation to electrochemical performance is crucial for designing effective electrode architectures. In this work, the effect of electrolyte cation and electrode morphology on birnessite (δ-MnO) deformation during charge storage in aqueous electrolytes was investigated using a mechanical cyclic voltammetry approach via atomic force microscopy (AFM) and molecular dynamics (MD) simulation. In both KSO and LiSO electrolytes, the δ-MnO host electrode underwent expansion during cation intercalation, but with different potential dependencies.

View Article and Find Full Text PDF

In this article, the synthesis, optical, and electrical properties of composites consisting of polyethylene oxide (PEO), carboxymethyl cellulose (CMC), and titanium dioxide nanoparticles are examined. Flexible nanocomposite samples comprising PEO, CMC, and TiO nanoparticles were produced swiftly via using the cast synthesis method. In addition, XRD and FT-IR analysis were performed in order to analyze the structures of the prepared samples.

View Article and Find Full Text PDF
Article Synopsis
  • Nanostructured birnessite is a promising electrode material for energy storage due to its high specific capacitance and ideal capacitive behavior in aqueous solutions.
  • The electrochemical capacitance mechanism in birnessite involves both Faradaic (redox reactions) and non-Faradaic (electrostatic) processes, requiring comprehensive analysis through various advanced characterization techniques.
  • Research insights reveal that charge storage is primarily facilitated by interlayer cation intercalation, influenced by nanoconfined water that supports interactions with minimal structural alterations.
View Article and Find Full Text PDF

Alkali ion insertion into Prussian blue from aqueous electrolytes is characterized with operando AFM and EQCM, showing coupling of current with deformation and mass change rates. Stable cycling occurs only with K, attributed to its lower hydration energy. The (de)insertion of K results in reversible deformation even in the open framework structure.

View Article and Find Full Text PDF

The anion-deficient fluorite-related family of materials exhibits a number of commercially useful properties arising from the specific arrangement of anion vacancies in each structure. One recently reported member, ZnInGeO, is the only known example with its particular complex structure in which cation coordinations span one 4-coordinate (4b), two 6-coordinate (8e and 16f), and one 8-coordinate (4a) site. A new, complete, solid solution (CuZn)InGeO, (0 ≤ ≤ 1) has been discovered via the isovalent substitution of Cu for Zn, significantly expanding the known phase space of this structure.

View Article and Find Full Text PDF

Essential or volatile oils of plants have been variously reported to have many medicinal applications. Methanol, acetone and petroleum ether extracts of Ocimum basilicum and Glycyrrhiza glabra were screened for their repellency effect against Culex pipiens mosquito. The repellent action of the present plants extracts were varied depending on the solvent used and dose of extract.

View Article and Find Full Text PDF

Novel chitosan-ZnO composites have been synthesized as luminescent taggants for cellulosic materials. The synthesized chitosan-ZnO nanospheres (CS-ZnO NS), chitosan-ZnO-oleic acid quantum dots (CS-ZnO-oleic QD) and chitosan-ZnO-oleic acid:Eu(3+) doped nanorods (CS-ZnO-oleic:Eu(3+) NR) were characterized by X-ray diffraction, photoluminescence spectroscopy, FTIR spectroscopy and transmission electron microscopy. The prepared luminescent CS-ZnO composites were used in printing paste and applied to different types of papers and textiles by using screen printing technique.

View Article and Find Full Text PDF

Disappearing inks have been used in different fields, but it may be abused in forgery and counterfeiting. This research was conducted on the preparation of disappearing inks using different concentrations of thymolphthalein, phenolphthalein, and their mixture. The prepared inks were applied to different types of handwriting papers.

View Article and Find Full Text PDF

Paraoxonase is a high-density lipoprotein-associated enzyme and has been shown to reduce the susceptibility to low-density lipoprotein peroxidation. This study aimed to investigate the activity of serum paraoxonase in uremic patients on hemodialysis (HD) and in the predialysis period, and to evaluate the correlations of vascular disease with paraoxonase activity. Thirty patients with chronic renal failure (CRF) undergoing HD (group 1), 30 patients with CRF under conservative treatment (group 2), and 30 healthy controls (group 3) were included.

View Article and Find Full Text PDF