2026-03-30
Abdullah Irankhah, Zahra Hossein Mirzaei, Atieh Ranjbar
The catalytic performance of xFe/MgO (x=10, 15, 20 wt.%) and Cu-promoted 15Fe-yCu/MgO (y=3, 5 wt.%) catalysts, fabricated via impregnation techniques on a precipitation-derived MgO support, was investigated for methane combustion. Maximum activity was observed for the 20Fe/MgO formulation, exhibiting light-off temperatures T ₁₀ and T ₅₀ of 412°C and 463°C, respectively. This superior activity is correlated with its physicochemical properties, namely a high specific surface area (49.70 m²·g ⁻ ¹), small crystallite size (22 nm), and presence of abundant Fe active sites on the surface of MgO or within Mg ₁₋ ₓFeₓO solid solution. In contrast, Cu promotion detrimentally affected performance, an effect ascribed to the blockage or fundamental alteration of the active sites and agglomeration of particles. The 20Fe/MgO catalyst further demonstrated notable operational stability, maintaining >80% CH ₄ conversion during a 25-hour time-on-stream analysis at 550°C. XRD characterization of the spent catalyst indicated progression of solid solution formation following the reaction.
2026-03-30
Raunak Katiyar, Sumit Kumar, Gopal L. Khatik
Carbonyl-containing compounds, such as aldehydes and ketones, are fundamental to synthetic organic chemistry, with wide-ranging applications in the pharmaceutical industry. In this study, we introduce an efficient and streamlined metallophotoredox approach for decarboxylative oxygenation via visible-light-induced ligand-to-metal charge transfer (LMCT). Our method simplifies the transformation of aryl aliphatic carboxylic acids into their corresponding aryl aldehydes and ketones, utilizing iron(III) triflate as a photo catalyst in the presence of TMEDA as a ligand. This strategy not only enhances environmental sustainability but also expands the potential for late-stage functionalization of complex molecules and bioactive compounds.
2026-03-30
Minakshi N. Bhatu, Guruprasad R. Malvankar, Akshay Chavan, Prajkta P. Baikar, Dipali S. Raut, Shubhangi P. Patil
The facile and efficient green method for the synthesis of Ag based bimetallic nanoparticles Ag-Ni is developed by using sprout water extract. The phytochemical present in the sprout water extract assist the reduction of both the metal simultaneously according to their reduction potential and provides the way for seedless, one pot green synthesis. In the present study sprout water was used for the synthesis of Ag, Ni monometallic and bimetallic Ag 25 Ni 75 , Ag 50 Ni 50 , Ag 75 Ni 25 because synergistic effect of two metal provides enhancement in catalytic properties of bimetallic nanoparticles. The synthesized nanocatalyst were further characterized by UV-visible analysis, XRD, EDX, NTA, TEM. The nanocatalyst is used for the reduction of organic pollutants like degradation of crystal violet dye and 4-nitrophenol. The nanoparticles were investigated for their antibacterial activity against Bacillus subtilis, staphylococcus aureus, Salmonella typhi, Pseudomonas aeruginosa, and Escherichia coli. The Ag 25 Ni 75 shows outstanding performance for the reduction of 4-Nitrophenol. It will reduce 84.69 % of 4- nitrophenol just in 60 second with constant 0.70 min -1 . The order of the reaction is pseudo first order. The Ag 75 Ni 25 shows excellent efficiency for the degradation of 66.37% crystal violet dye in 3 hrs following pseudo first order reaction with rate constant 0.007733min -1 . The Ag 75 Ni 25 exhibits more zone of inhibition in B. subtilis, S. aureus, S. typhi, P. aeruginosa, and E. coli 15.36 ± 0.28 mm, 15.23 ± 0.15 mm, 15.40 ± 0.20 mm, 15.33± 0.23 mm, 15.40 ± 0.20 mm than monometallic silver and nickel.
2026-03-30
Mahrokh Farrokh
Mahrokh Farrokh was born in Qom, Iran, in 1999. She received her B.Sc. in Applied Chemistry (2022) from Bu-Ali Sina University, Iran. She received her M.Sc. in Organic Chemistry (2024) under the supervision of Prof. Mohammad Ali Zolfigol and Prof. Maryam Hajjami. Also, she was also accepted for a Ph. D. in organic chemistry at the Bu-Ali Sina University in the same year. Her research interest is the synthesis, characterization and applications of homogeneous and heterogeneous reagents and catalysts in organic synthesis.
2025-12-31
Zulaikha Athirah Alexzman, Nurrulhidayah Salamun, Mohd Lokman Ibrahim, Siti Hajar Anaziah Muhamad, Sharifah Najiha Timmiati, Nur Hazirah Ruzali Annuar
The study highlights the synthesis of Chromium Oxide Silica (CrSi) and Chromium Oxide Alumina (CrAl) catalysts using sol-gel and impregnation methods, respectively, and their evaluation in sorbitol hydrogenolysis. Characterization techniques such as nitrogen physisorption, FTIR spectroscopy, SEM, and TGA analyses were employed. CrSi exhibited a higher surface area (132.47 cm³/g) compared to CrAl (120.71 cm³/g), correlating with its superior catalytic performance. FTIR identified crucial functional groups, while SEM images showed a consistent porous structure for CrSi. TGA indicated thermal stability for both catalysts. Under optimized conditions, CrSi demonstrated superior performance, achieving a sorbitol conversion rate of 70.08% with notable selectivity towards ethylene glycol (33.95%) and propylene glycol (45.66%). In contrast, CrAl displayed a slightly lower conversion rate of 67.59%, with selectivity towards ethylene glycol (20.21%) and propylene glycol (37.56%), highlighting CrSi superior efficiency in sorbitol hydrogenolysis. This study emphasizes the significance of carefully choosing and optimizing catalysts for improving process efficiency and selectivity in sorbitol hydrogenolysis for industrial applications.
2025-12-31
Marzieh Babaie, Jalal Albadi, Hamzeh Kiyani, Zahra Hemati, Maryam Banitalebi
In this research, an eco-friendly procedure is reported for the synthesis of NiO/MgO nanocomposite by the co-precipitation method. The obtained nanocomposite was characterized using FE-SEM, EDS, BET, XRD, and TGA analyses. The catalytic performance of the NiO/MgO nanocomposite was investigated in the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles under mild conditions. The results revealed that the desired triazole derivatives were produced in high yields with excellent selectivity. The catalyst exhibited notable stability and recyclability over several cycles without significant loss of activity. In addition, the antibacterial activity of the NiO/MgO nanocomposite was evaluated against various bacterial strains, showing good inhibitory effects against the tested pathogens.
2025-12-31
Mahrokh Farrokh
Nitro compounds are important chemicals that are used in a wide range of laboratories and industries to prepare pharmaceuticals, agriculture, and various useful materials. Also, many nitro compounds have explosive properties and are used in military industries. Therefore, nitration reactions are of great importance in the field of chemistry. Scientists are trying to find more demands for these compounds by studying their various aspects because they have a wide range of applications.
2025-12-16
Fateme Behjati Ardakani, Mohammad Abdollahi-Alibeik
A simple protocol is reported for the oxidative amidation of aromatic aldehydes or alcohols with amines to aromatic amides by a magnetic silica-supported copper complex of Schiff base as a heterogeneous solid catalyst using hydrogen peroxide as an oxidizing agent. Under optimized conditions, oxidative amidation of benzaldehyde or benzyl alcohol with morpholine is achieved using this nanostructured catalyst with 98% amide selectivity. In addition, this catalyst is used to convert a wide range of aldehydes to their respective amide derivatives. The catalyst can be easily separated from the reaction mixture using an external magnetic field and is reusable for up to five consecutive cycles. Its structural characteristics are thoroughly analyzed using Fourier Transform Infrared Spectroscopy (FT-IR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDS).
2025-09-29
Ayad Dari, Mohammed Shorbaz, May Ali, Ahmed Zamil
This process studies the efficiency of the advanced oxidation processes, which were used to decompose tetracycline hydrochloride in aqueous solutions by CNT/Fe 2 O 3 /TiO 2 /Bentonit. A nanocatalyst was prepared with high conductivity, broad light absorption, and high surface area, utilizing Photocatalysts again. Several process variables (irradiation time, contaminant concentration, catalyst dosage, and pH) were studied. X-ray diffraction analysis. The quality of the high-performance nanocomposite catalyst construction will be improved if X-ray diffraction (XRD) shows that the catalyst has been transformed into a pure homogeneous structure. At pH 5, the contaminant was degraded in 120 min with a dose of 15 mg of the nanocomposite. At a concentration of 0.5 ppm tetracycline hydrochloride, the clearance rate reached 95.1%. The removal rate decreased with increasing pH, while titanium oxide degraded the tetracycline hydrochloride, bentonite, and nanocarbon exhibited contaminant adsorption capacity. The regression coefficient (R 2 ) of 0.97 indicated that the process best conformed to quasi-first-order kinetics.