Iranian Journal of Catalysis (IJC)Activity of Cu-Co-M (M= Ce, Ni, Au, Mg) catalysts prepared by coprecipitation method, calcined at high temperature for CO oxidationVolume 7 (2017)Issue 4, December 201720240203Activity of Cu-Co-M (M= Ce, Ni, Au, Mg) catalysts prepared by coprecipitation method, calcined at high temperature for CO oxidationENGauravRattanDr. S. S. Bhatnagar University Institute of Chemical Engineering & Technology, Panjab University, Chandigarh, India.ChiragKhullarDr. S. S. Bhatnagar University Institute of Chemical Engineering & Technology, Panjab University, Chandigarh, India.ManinderKumarDepartment of Chemical Engineering, Chandigarh University, Mohali, Punjab, India.Journal Article20240203The present study deals with analysis of the activity of catalysts prepared by addition of different metals to Copper and Cobalt based catalysts for CO oxidation and the variation in activity caused by changes in composition. A series of catalysts were prepared with Cu:Co molar ratio 1:4 and a third metal (M= Ce, Ni, Au, Mg) was added in three different quantities. Compositions were prepared by coprecipitation method, calcinated at 550°C for three hours. The results reported that the cerium based catalysts showed the highest activity T100% = 390°C in terms of CO oxidation whereas gold based catalysts showed the least activity
T58.24% = 418°C. The best selected catalyst of each group was characterized by the Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR).Iranian Journal of Catalysis (IJC)1,4-Disulfopiperazine-1,4-diium chloride ([Piper-(SO3H)2].2Cl) as an efficient ionic catalyst for synthesis of phthalazine derivativesVolume 7 (2017)Issue 4, December 2017202402031,4-Disulfopiperazine-1,4-diium chloride ([Piper-(SO3H)2].2Cl) as an efficient ionic catalyst for synthesis of phthalazine derivativesENFarhadShiriniDepartment of Chemistry, College of Science, University of Guilan, Rasht, Iran0000-0002-7204-5000TaherehGhauri KoodehiDepartment of Chemistry, College of Science, University of Guilan, Rasht, 41335, Iran.OmidGoli JolodarDepartment of Chemistry, College of Science, University of Guilan, Rasht, IranJournal Article20240203This article describe the applicability of 1,4-disulfopiperazine-1,4-diium chloride ([Piper-(SO3H)2].2Cl) as a green, versatile and Brönsted acidic ionic catalyst in the promotion of the synthesis of phthalazine derivatives via one-pot three component reaction between aromatic aldehydes, 1,3-diketone derivatives and phthalhydrazide under solvent-free reaction conditions. The main advantages of this method are: (1) simplicity of the procedure, (2) solvent-free conditions, (3) availability of the starting materials, (4) high reaction rates and excellent yields, (5) reusability of the catalyst and (6) no column chromatographic of the products.Iranian Journal of Catalysis (IJC)Efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones using nano-sized protonated ZSM–5 as a biodegradable and reusable solid acid catalystVolume 7 (2017)Issue 4, December 201720240203Efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones using nano-sized protonated ZSM–5 as a biodegradable and reusable solid acid catalystENSedighehRostamiDepartment of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan. Iran.Journal Article20240203Nano-sized protonated ZSM–5 ( H-ZSM-5nanozeolite) was successfully synthesized by the hydrothermal method using the bagasse ash (BGA) as a new silica source. Cultivated BGA in the south of the Caspian Sea (Mazandaran province, Iran) was used for extracting silica powder. H-ZSM-5 was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and Brunauer–Emmett–Teller (BET), Barrett-Joyner-Halenda (BJH) techniques. The catalytic activity of H-ZSM-5 nanozeolite was evaluated for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via one-pot three-component reaction of aromatic aldehydes, 2-aminobenzothiazole or 2-aminobenzimidazole and isatoic anhydride under solvent-free conditions. Short reaction time, high yields, a simple experimental procedure in the absence of any toxic solvents and recovery of catalyst are the advantages of this protocol.Iranian Journal of Catalysis (IJC)P-type semiconducting NiO nanoparticles synthesis and its photocatalytic activityVolume 7 (2017)Issue 4, December 201720240203P-type semiconducting NiO nanoparticles synthesis and its photocatalytic activityENAlirezaHeidarinekoDepartment of Chemistry, Center Tehran Branch, Islamic Azad University, Tehran, Iran.AzarBagheri GhomiDepartment of Chemistry, Center Tehran Branch, Islamic Azad University, Tehran, Iran.Journal Article20240203Nickel oxide (NiO) nano-size powder is synthesized using nickel (II) acetate tetrahydrate, sodium lauryl sulfate (SLS) and ammonia as precursors. Applied surfactant is anionic surfactant. The sample was characterized by FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM). The results obtained confirm the presence of nickel oxide nano-powders produced during chemical precipitation. Evaluation of the catalytic activity of developed nano-NiO particles were carried out using ultraviolet visible spectra. The uv-vis spectra obtained after ultraviolet irradiation in the presence of nickel oxide can indicate the degradation of tetracycline (TC) and dye Acid red -18 (ponceau 4R). The prepared NiO exhibits that 75% of Acid red -18 has been eliminated after 10 min.The results indicate that optimum concentration of NiO catalyst and the best pH for the degradation of AR were 0.5 g L-1 and pH 7, respectively. The best TC degradation results were obtained with 2 g L−1of the photocatalyst at pH 11.Iranian Journal of Catalysis (IJC)TiO2/nanoclinoptilolite, a recyclable and high efficient heterogeneous nanocatalyst, for the synthesis of 2-amino-4H-chromene derivativesVolume 7 (2017)Issue 4, December 201720240203TiO2/nanoclinoptilolite, a recyclable and high efficient heterogeneous nanocatalyst, for the synthesis of 2-amino-4H-chromene derivativesENFarzadJavadiDepartment of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran.RezaTayebeeDepartment of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran.Journal Article20240203The synthesis of pharmaceutically and biologically active 2-amino-4H-chromenes was described using TiO2/nanoclinoptilolite (TiO2/NCP) as an efficient nanocatalyst under solvent-free condition. The TiO2/NCP was fabricated through modification of NCP with HDTMA, then the surface modified NCP was impregnated with titanium tetrachloride solution. Finally, the material incorporated with titanium was calcinated at 500 ºC and was characterized by FT-IR, ICP-OES, SEM, and XRD. The experimental conditions have been completely optimized and established, providing an increase in the rate and high yields. This procedure provides several merits such as a simple workup, economical, environmentally benign, short reaction time and excellent yields. Moreover, the prepared nanocomposite showed very high stability and reusability in the synthetic method under solvent-free and mild conditions.Iranian Journal of Catalysis (IJC)A green synthesis of di-indolyloxindols catalyzed by CuO/g-C3N4 nanocomposite under mild conditionsVolume 7 (2017)Issue 4, December 201720240203A green synthesis of di-indolyloxindols catalyzed by CuO/g-C3N4 nanocomposite under mild conditionsENAliAllahresaniDepartment of Chemistry, Faculty of Science, University of Birjand, P. O. Box 97175-615, Birjand, Iran.Journal Article20240203In this study, novel CuO/g-C3N4 nanocomposite was simply synthesized by impregnation of g-C3N4 with CuO nanoparticles. Then, the heterogeneous catalyst was characterized by various techniques including Fourier transform infrared spectroscopy
(FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). Moreover, the Friedel–Crafts 3-indolylation reaction of isatin with indole derivatives in water as a green solvent was investigated using catalytic amount of CuO/g-C3N4 nanocomposite. The results showed that di-indolyloxindole derivatives are synthesized in good to excellent yields at mild conditions. Finally, this method has some advantages including the use of water as a green solvent, short reaction time, room temperature, easy work up and excellent yields.
Keyword: CuO/g-C3N4 nanocomposite; di-indolyloxindols; indole; isatin.Iranian Journal of Catalysis (IJC)Developments of modified magnetic nanoparticle -supported heteropolyacid catalytic performances in dibenzothiophene desulfurizationVolume 7 (2017)Issue 4, December 201720240203Developments of modified magnetic nanoparticle -supported heteropolyacid catalytic performances in dibenzothiophene desulfurizationENHosseinSalavatiDepartment of Chemistry, Payame Noor University, 19395-3697, Tehran, Iran.AbbasTeimouriDepartment of Chemistry, Payame Noor University, 19395-3697, Tehran, Iran.ShahnazKazemiDepartment of Chemistry, Birjand University, 97179-414, Birjand, Iran.Journal Article20240203In this research, Keggin-type polyoxometalate, H5PMoV2O40 (denoted as PMoV) was immobilized on modified NiFe2O4 nanoparticles to produce a magnetically separable catalyst. This catalyst was characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), cyclic voltummetry (CV), energy dispersive X-ray (EDX) and UV-vis diffuse reflectance spectroscopy (UV-DRS). The catalytic activity of synthesized catalyst in oxidation of dibenzothiophene (DBT) to dibenzothiophene sulfone (DBTO2) was investigated using H2O2 as an oxidant and acetonitrile as an extractant. The catalyst could be readily separated from the catalytic system using the magnetic field; and loss of activity was negligible when the catalyst was recovered in five consecutive runs. The effects of main process variables including H2O2 amount (mmol), reaction temperature (°C) and reaction time (min) were analyzed by response surface methodology (RSM) based on the central composite design (CCD). The optimal condition for conversion of DBT was found to be H2O2 2.8 mmol, reaction temperature 42°C and reaction time 57 min for 0.1 g of catalyst dosage. The conversion of DBT to DBTO2 under optimized conditions was 85.9 %. Moreover, the dibenzothiophene sulfone product was characterized by NMR, FT-IR, Mass and GC analysis.Iranian Journal of Catalysis (IJC)Taguchi optimization of photodegradation of yellow water of trinitrotoluene production catalyzed by nanoparticles TiO2/N under visible lightVolume 7 (2017)Issue 4, December 201720240203Taguchi optimization of photodegradation of yellow water of trinitrotoluene production catalyzed by nanoparticles TiO2/N under visible lightENHamidReza PouretedalDepartment of Applied Chemistry, Maleke-ashtar University of Technology, Shahin-shahr, Esfahan, IranMohammadFallahgarFaculty of Applied Chemistry, Malek-ashtar University of Technology, Shahin-Shahr, I. R. Iran.FahimehSotoudeh PourhasanFaculty of Applied Chemistry, Malek-ashtar University of Technology, Shahin-Shahr, I. R. Iran.MohammadNasiriFaculty of Applied Chemistry, Malek-ashtar University of Technology, Shahin-Shahr, I. R. Iran.Journal Article20240203Taguchi experimental design technique was used for optimization of photodegradation of yellow water sample of trinitrotoluene (TNT) production process. The nanoparticles of doped N-TiO2 were also used as photocatalysts in the photodegradation reaction under visible light. The ranking of data based on signal to noise ratio values showed that the importance order of the factors affecting the degradation efficiency was: the nature of photocatalyst > time of photodegradation > amount of photocatalyst > initial concentration of pollutant. The optimized conditions were photocatalyst of TiO2/N0.1 photocatalyst dosage of 1.5 g L-1 and dilution times of 750 for real samples. The photocatalyst of TiO2/N0.1 was analyzed by BET surface analysis, X-ray diffraction pattern, field emission scanning electron microscopy (FE-SEM), energy-dispersive
X-ray spectroscopy (EDS) and diffuse reflectance spectra (DTS). Relatively high surface area of 150 m2×g-1, anatase/rutile structure, approximately uniform distribution of nanoparticles size and band-gap energy of 2.92 eV were measured for TiO2/N0.1 nanophotocatalyst. A linear model with the regression coefficient (R2) of 0.887 was obtained by the multiple linear regression analysis. The proposed model was "Degradation efficiency (Y) = 20.492 + 1.461 X1 + 6.330 X2 + 0.014 X3 + 2.291 X4". The obtained P-values in the confidence level of 95% were < 0.05, showing a meaningful addition in the model. Therefore, changes in the predictor’s value are due to changes in the response variable.Iranian Journal of Catalysis (IJC)Synthesis and characterization of Pt3Co bimetallic nanoparticles supported on MWCNT as an electrocatalyst for methanol oxidationVolume 7 (2017)Issue 4, December 201720240203Synthesis and characterization of Pt3Co bimetallic nanoparticles supported on MWCNT as an electrocatalyst for methanol oxidationENAkbarRostami-VartooniDepartment of Chemistry, Faculty of Science, University of Qom, Qom 3716146611, Iran.0000-0002-5395-9966AhmadNozad GolikandMaterial and Nuclear Fuel Research School, NSTRI, 81465-1589, Isfahan, Iran.MojtabaBagherzadehReactor and Nuclear Safety School, Nuclear Science and Technology Research Institute, 81465-1589, Isfahan, IranJournal Article20240203The impregnation method was used to synthesize Pt and Pt3Co supported on MWCNTs applying NaBH4 as the reducing agent. The structure, morphology, and chemical composition of the electrocatalysts were characterized through SEM, XRD, and EDX. X-ray diffraction showed a good crystallinity of the supported Pt nanoparticles on the composites and showed the formation of Pt3Co alloy. The SEM images revealed that the particles of Pt3Co were deposited uniformly on the surface of MWCNT with a diameter of 10 nm. EDX analysis confirmed the surface segregation of Co and Pt occurred (1:3 surface atomic ratio Pt-Co) for the Pt3Co/MWCNT nanocomposite. The Pt3Co/MWCNTs and Pt/MWCNTs electrocatalysts’ electrochemical performance was assessed against the methanol oxidation reaction (MOR) in 0.5 M H2SO4 solution using the chronoamperometry (CA) and the cyclic voltammetry (CV) methods. The minimum onset potential and the largest oxidation current density were obtained at Pt3Co/MWCNTs electrocatalyst. The Pt3Co/MWCNT catalyst with a good alloying degree has been shown to have better anti-poisoning ability, electrochemical activity, and long-term durability than Pt/MWCNT catalysts, approved by the bimetallic catalysts’ bi-functional mechanism.Iranian Journal of Catalysis (IJC)Baker’s yeast catalyzed Henry reaction: Biocatalytic C-C bond formationVolume 7 (2017)Issue 4, December 201720240203Baker’s yeast catalyzed Henry reaction: Biocatalytic C-C bond formationENPrabhakarShrivasDepartment of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, 440 010, IndiaNiteshPunyapreddiwarDepartment of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, 440 010, IndiaAtulWankhadeDepartment of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, 440 010, IndiaSangeshZodapeDepartment of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, 440 010, IndiaUmeshPratapDepartment of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, 440 010, IndiaJournal Article20240203The C-C bond formation is an important reaction in organic synthesis to obtain value-added intermediates. Therefore, in this paper an attempt has been made to accelerate the Henry reaction (C-C bond formation) between aryl aldehydes and nitromethane using less expensive whole cell biocatalyst, baker’s yeast (BY). The scope of the methodology was also tested for the heteryl aldehyde i.e. 2-chloro-3-formyl quinoline to obtain the corresponding quinoline containing nitroalcohol. The developed protocol is highly efficient and completely environmentally friendly. The work addressed the issue of non-aqueous biocatalysis, since Henry reaction catalysed by baker's yeast has been carried out in ethanol.