Journal of Physical and Theoretical Chemistry
Volume:18 Issue: 4, Winter 2021

The applicability of Asparagus plant functionalized with iron oxide nanoparticles synthesis for eliminating dyes from aqueous media has been confirmed. The techniques including FT-IR, BET, XRD and SEM for investigation showed the applicability of Asparagus plant functionalized with iron oxide nanoparticles as adsorbent for proper deletion of Methyl Orange dye from aqueous, and article the values of 15 mgL-1, 0.1 g, 7.0, 20.0 min were considered as the ideal values for Methyl Orange dye concentration, adsorbent mass, pH value and contact time respectively. The adsorption equilibrium and kinetic data were fitted with the Langmuir monolayer isotherm model (q: 0.9915) and pseudo-second order kinetics (R2: 0.998) with maximum adsorption capacity (qmax: 167.7 mgg-1) respectively. Thermodynamic parameters (ΔG°: -11.42 kJ mol-1, ΔH°: 33.3 kJ mol-1, ΔS°: 145.8 kJ mol-1 K-1), also indicated Methyl Orange dye adsorption is feasible, spontaneous and endothermic. Overall, taking into account the excellent efficiency, good regeneration and acceptable performance in real terms, Asparagus plant-capped Fe3O4NPs can be introduced as a promising absorbent for dyes removal from aqueous solutions.

The applicability of Albizia Stem Bark Lebbeck Modified by Fe2(MoO4)3 nanocomposite, was studied for eliminating Methyl Violet dye from industrial wastewater. Identical techniques including (IR, XRD, and SEM) have been utilized to characterize this novel material. The impacts of variables including initial Methyl Violet concentration (X1), pH (X2), adsorbent dosage (X3), and sonication time (X4) came under scrutiny using central composite design (CCD) under response surface methodology (RSM). The values of 20 mgL-1, 0.03 g, 5.0, 3.0 min were considered as the ideal values for Methyl Violet concentration, adsorbent, pH, and contact time, respectively. Adsorption equilibrium and kinetic data were fitted with the Langmuir monolayer isotherm model and pseudo-second-order kinetics (R2: 0.999) with maximum adsorption capacity (120.4 mgg-1), respectively. Thermodynamic parameters (ΔG°: -9.26 kJ mol-1, ΔH°: -29.24 kJ mol-1, ΔS°: -131.49 kJ mol-1 K-1), also indicated Methyl Violet adsorption is feasible, spontaneous and exothermic. Overall results confirmed that Albizia Stem Bark Lebbeck Modified by Fe2(MoO4)3 nanocomposite is an effective adsorbent for removing the toxic dyes from an wastewater.

In this study, in order to produce biodiesel fuel from mixture of crop mustard and edible waste oil, ester exchange method with heterogeneous calcium oxide catalyst prepared from fish bones was used as a catalyst. Then, the effect of the contribution of important and effective factors on the molar ratio of oil to methanol, catalyst percentage, reaction temperature and reaction time on the amount of biodiesel production was investigated using Taguchi experiment design method. In biodiesel production method the optimum reaction, it can be seen that the effect of this parameter is strongly effective in the production of biodiesel with a ratio of (1:12), that this molar ratio of oil to methanol (1:12) has the best efficiency. According to the results, the amount of (0.3%) calcium oxide catalyst prepared from fish bones can be considered as the maximum value in biodiesel production. It was observed that, with increasing the reaction temperature from (55°C to 65°C), the amount of biodiesel production increases by about 8% and with the continuation of increasing the temperature from (65°C to 75°C), with a sharp decrease in production (about 30%) We face. As a result, temperature for biodiesel production is (65°C), and best efficiency and maximum percentage of biodiesel production occur in (5 h) of reaction time. The thermophysical properties of biodiesel produced from these oils were compared with standard biodiesel and all its properties were within the allowable range of standard ASTM D-6751.

OLEDs (Organic Light Emitting Diodes) are a breakthrough innovation in lighting and display technology for a wide array of reasons. OLEDs can be implemented in various applications from home lighting, to TV screens or GPSs. OLEDs have a 30% higher efficiency than inorganic Light Emitting Diodes (LEDs) [1]. In this review, we will delve into the pros and cons of OLEDs, as compared to other current lighting/display technologies [2]. OLEDs utilize various combinations of organic substrates to suit many specific lighting applications. A wide array of applications will be brought up and analyzed in this review. For most OLEDs, the anode is transparent, while the cathode is made of metal. The organic layer in the OLED generally has a thickness between 100 and 150 nm [3]. The specific substrates used in these applications, and their benefits will be thoroughly investigated. OLEDs are a new-age solution to hazardous forms of lighting such as CFLs (Compact Fluorescent Lamps), which contain the pollutant, Mercury (Hg). [4] More information on their environmentally friendliness and social benefits will be explored in this review as well.

In this research the role of carbon nanotubes as carrier of pimagedine drug have been investigated. These drugs have been used in cure of diabetes. For this purpose nanotubes (8, 0) with different length have been used. To perform of quantum calculation we used Gaussian software and DFT/B3LYP method and 3-21G basis set. In this research first of all pimagedine drug from head and other time by azo methane elide agent has been connected to each nano structures. Calculation have been done in 2 phases, liquid and gas, and parameters like electron energy, adsorption energy, HOMO,LUMO and dipole moment have been calculated and results showed that the best nitrogen in drug is N1. Because the dipole moment of N1 in connection time is larger than other nitrogen. Furthermore the dipole moment of drug and nano tube complex with the length of 10 A° aqua phase have the largest value moment between drug and other complexes and it value is 14.99 Debye that it’s larger dipole moment in aqua solution show the ability of better solubility and investigation of adsorption energy also show that the best adsorption energy was in the case of nanotube with the length of 8 A° and with higher length the adsorption energy have been reduced. Investigation of dipole moment also show that the highest solubility is drug  with agent and nanotube complex and the best support for this calculation is Nanocone support with 180 degree and 8 length.

Tartrazine is a synthetic organic food dye that can be found in common food products such as bakery products, dairy products, candies, and beverages. That the must be controlled in food produced, and content of the TZ color, potential harmful to human beings. Although the liquid chromatographic, and other methods for the TZ color has advantages such as excellent accuracy and reproducibility, it has limitations such as long-time measure, high equipment cost. In this study, for the determination TZ color in solution we used a prepared from starch-capped ZnSNPs sensor and kinetic spectrophotometric method. The calibration curve was linear in the range (0.01 to 10.0 mg L−1), and the standard deviation of (1.0 %), and detection limit of the method (0.01 mg L−1 in time 25 min, 399 nm), were obtained for sensor level response starch-capped ZnSNPs with (95%), confidence evaluated. The chemical starch-capped ZnSNPs sensor made it possible as an excellent sensor with reproducibility.