Hamid Reza Pouretedal
Faculty of Applied Chemistry, Malek-ashtar University of Technology, Shahin Shahr, I.R. IRAN
[ 1 ] - Characterization and Photocatalytic Activity of ZnO, ZnS, ZnO/ZnS, CdO, CdS and CdO/CdS Nanoparticles in Mesoporous SBA-15
Grinding (solvent-free) method was used as a superior technique to prepare mesoporous photocatalysts of ZnO, ZnS, ZnO / ZnS, CdO, CdS and CdO / CdS-SBA-15. In this technique, the nitrate, acetate and chloride salts of zinc and/or cadmium were grinded with as-synthesized SBA-15 as a mesoporous material. The controllable sulfurationis was used to prepare ZnS, ZnO/ZnS, CdS and CdO/CdS-SBA-15 a...
[ 2 ] - Photodegradation of HMX and RDX in the Presence of Nanocatalyst of Zinc Sulfide Doped with Copper
Nanoparticles of zinc sulfide as undoped and doped with copper were used as photocatalyst in the photodegradation of HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) as nitramine explosives under UV and Vis irradiations. Photoreactivity of doped zinc sulfide was varied with dopant, mole fraction of dopant to zinc ion, pH of solut...
[ 3 ] - Spectroscopic Study of the Interaction Between TCNQ and Cryptand 222 in Chloroform Solution
The interaction between 4, 7, 13, 16, 21, 24 - hexaoxa-1,10 - diazabicyclo [8.8.8] hexacosane (C222) and 7,7,8,8- teracyanoquinodimethane (TCNQ) has been studied in chloroform at 25°C. The results indicate a two step mechanism. At the first step, two adducts (assign as P1 and P2) are formed through equilibrium reactions. In continue and through nonequilibrium reactions the adducts are conve...
[ 4 ] - Spectrophotometric Study of the Complexation of Iodine and Bromine with Tetrabutylammonium Halides and Cryptand 222 in Dichloromethane Solution
A spectrophotometric study concerning the interactoin between iodine and bromine with tetrabutylammonium iodide (TBAI), tetrabutyl- ammonium bromide (TBABr) and cryptand 222 (C222) has been performed in dichloromethane solution at 25°C. The results are indicative of the formation of TBA+X3- and C222X+X3- t...
[ 5 ] - Spectrophotometric Study of the Intreaction of some Benzo, Benzyl and Phnylcrown Ethers with Pi-Acceptor DDQ in Chloroform Solution
The interaction between benzo-15-crown-5 (B15C5), dibenzo-18-crown-6 (DB18C6), dibenzyl-daza-18crown-6 (DBzDA18C6), N-phenyl-aza-15-crown-5 (NPhA15C5) and dibenzopyridine-18-crown-6 (DBPy18C6) with π-acceptor 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) in chloroform solution was studied spectrophotometrically. The interaction of B15C5-DDQ and DB18C6-DDQ caused the formation...
[ 6 ] - Catalytic Kinetic Determination of Silver through its Catalytic Effect on Congo Red-Peroxodisulphate Reaction
A kinetic-spectrophotometric procedure is reported for determination of trace amounts of Ag(I). This method is based on catalytic effect of silver ion on the oxidation of congo red by potassium peroxodisulphate at pH=3.4 and 30 oC in the presence of 1,10-phenanthroline as an activator. The reaction was followed spectrophotometrically by measuring the rate of change in absorbance ...
[ 7 ] - Effect of temperature on kinetics of the hydrogen evolution reaction on Ni-P-C cathodes in alkaline solution
The kinetics of hydrogen evolution reaction (HER) was studied in 1M NaOH at various temperatures (298 to 358 K) on Ni-P-C (composite electrodes. The electrochemical efficiency of the electrodes has been evaluated on the basis of electrochemical data obtained from the steady-state polarization Tafel curves, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) in 1M NaOH solut...
[ 8 ] - بررسی روند کاهش وزن مواد منفجره PETN و پنتاستیت به روش های آنالیز حرارتی DTA/TG
In this research, the thermal stability and decomposition kinetics of pentaerythritol tetranitrate (PETN) and Pentastite explosives have been studied experimentally using non-isothermal differential thermal analysis (DTA) and thermo-gravimetric (TG) methods at heating rates of 4.0, 6.0, 8.0 and 10.0 °C/min. The kinetic parameter of activation energy (Ea) and critical ignition temperature fo...
[ 9 ] - مطالعه سینتیک تخریب هگزامین در استیک اسید و تاثیر آن بر بازده و خلوص HMX در فرآیند بکمن
Abstract Dissolved hexamine in acetic acid is used as precursor in production of HMX explosive by Beckmann procedure. But, the gradual degradation of hexamine is occurred in acidic media, leading to decrease of purity and efficiency of HMX. In this research, the kinetic of degradation reaction of hexamine is studied in acetic acid media. The concentration of formaldehyde as product of degradati...
[ 10 ] - مطالعه سه گانه سینتیکی واکنش تجزیه شدن حرارتی ماده منفجره اکفل به روش آنالیز حرارتی دیفرانسیلی غیر همدما
One of the characteristics of solid organic compounds and especially organic explosives is thermal behavior and kinetic of thermal decomposition. The activation energy, Arrhenius constant and model of solid state reaction as kinetic triplet can be obtained by study thermal decomposition kinetic in a solid state reaction. In the present work, the non-isothermal differential thermal analysis (DTA...
[ 11 ] - تعیین طول عمر ماده منفجره اکفول با استفاده از روش تجزیه حرارتی وزن سنجی(علمی-پژ‍وهشی)
Determine the lifetime of explosive chemicals is one of the important research fields in recent years. Among the various methods of estimating life expectancy, methods based on solid-state kinetic analysis of the thermal decomposition of a chemical explosive are scientific and the accuracy of the method is confirmed. In this study, the determination of kinetic parameters of Ocfol explosive was ...
[ 12 ] - تعیین نیمه عمر تخریب پایدار کننده پیشرانه دوپایه تفنگی (علمی-ترویجی)
پیشا بًِّی د پٍبی ث طِ سَ هعو لَ ؿبهل یًتش ػٍل لَض ث عِ اٌَی یه پلیوش ا شًطیصا، یًتش گٍلیؼیشیی ث عِ اٌَی یه شًمو ذٌ پشا شًطی دی ف یٌل آهیی (DPA) ث ع اٌَی پبیذاس و ذٌ هیثبؿ ذٌ. یًو عوش یه وً پیشا د پٍبی تف گٌی حب یٍ یًتش ػٍل لَض، یًتش گٍلیؼشیی دیف یٌل آهیی ث س ؽٍ پیشؿذگی تؼشیع یبفت پیؾ ثی یٌ ؿذ اػت. یًو عوش، هذت صهب یً تعشیف هی ؿ دَ و 50 دسکذ پبیذاسو ذٌ تخشیت ؿ دَ. اػتخشاد پبیذاسو ذٌ پیرشا )دی ف یٌرل 85 دسر ػب تًیگرشاد، ا زًربم ؿرذ وً رًَ 70 ، ...
[ 13 ] - مطالعه حلالیت و کریستالیزاسیون تبخیری HMXدر حلال متیل اتیل کتون و اندازه‌گیری کمی تبدیل پلی‌مورف‌های نوع در به روش پراش اشعه ایکس و طیف‌سنجی رامان
In this research, with evaluation of the solubility of cyclotetramethylene tetranitramine (HMX) explosive in different concentrations of water- methyl ethyl ketone (MEK) solvent, at a temperature range of 40-70 °C, some solubility and thermodynamic parameters such as enthalpy of dissolution and mixing were calculated. Thereafter, in order to increase the capacity of the crystallization process,...
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