CV Techniques Research Articles

Novel one-step synthesis for 3-D four-pointed micro-star of quaternary metal (Mo–V–Mn–Ag) oxide electrode for asymmetric supercapacitor

An intention of the present work is to synthesize a quaternary metal oxide by a simple and cost-effective method. MoVMnAg-oxide@Ni-foam is synthesised by one-step hydrothermal method. The as-deposited MoVMnAg-oxide sample is systematically examined through XRD, FESEM, EDS-mapping, and TEM analysis. The electrochemical performance of an MoVMnAg@Ni-foam electrode is tested using CV, GCD, and EIS techniques. MoVMnAg-oxide@Ni-foam has a considerable high areal capacitance of 651 mFcm−2 with 0.13 mWhcm−2 energy at 1.8 mWcm−2 power density in 1 M KOH electrolyte calculated from GCD curves. Also, the electrode shows a diffusion coefficient of 1.52 × 10−7 cm2s−1 along with 91 % of diffusive-controlled contribution and a b-value of 0.51, which depicts faradaic charge storage mechanism. An assembled asymmetric supercapacitor device (MoVMnAg@Ni-foam//AC) delivers an areal capacitance of 312 mFcm−2 with 0.37 mWcm−2 power density at 1 mAcm−2 current density within 0 – 1.5 V voltage window. The asymmetric device showed cyclability and coulombic efficiency of 80.3% and 95% respectively measured up to 10,000 GCD cycles. These results demonstrate the deposition of quaternary metal oxide directly on Ni-foam showing highly competitive electrochemical performance so that they can be utilized in energy storage applications.

Formation of robust CEI film on high voltage LiNi0.6Co0.2Mn0.2O2 cathode enabled by functional [PIVM][TFSA] ionic liquid additive

• A novel multifunctional ionic liquid was designed and synthesized using a two-step method. • Physicochemical properties of the new ionic liquid with DMC and EMC were investigated. • The cycle performance and rate properties were enhanced by adding an ionic liquid additive. • The mechanisms were determined by CV, SEM and XPS analysis techniques. The ionic liquid 1-(3-amino-3-oxopropyl)-3-vinylimidazolium bis(trifluoromethylsulfonyl)amide ([PIVM][TFSA]) was synthesized and applied in the electrolyte of Li/LiNi 0.6 Co 0.2 Mn 0.2 O 2 lithium ion batteries. The thermostability of this pure ionic liquid was investigated to provide a wide liquid range from -50 ℃ to 200 ℃. The physicochemical properties of binary mixtures of this ionic liquid with DMC and EMC were measured at different temperatures and with different ionic liquid mole fractions. [PIVM][TFSA] widens the electrochemical window of the electrolyte. The ionic liquid inhibits the increasing of water and HF content in the electrolyte. A comparison of charge and discharge performances in different electrolytes with various content of ionic liquid is reported. The electrolyte with the concentration of 1.0 wt % [PIVM][TFSA] has the best electrochemical properties. It enhances the initial capacity, the capacity retention and the high current rate performance of the cells. The surface film on the electrodes was confirmed by SEM and XPS that the ionic liquid [PIVM][TFSA] participated in membrane formation and played an active role.

Effects of Electrolytes on the Electrochemical Impedance Properties of NiPcMWCNTs-Modified Glassy Carbon Electrode.

The supercapacitive properties of synthesized nickel phthalocyanine multiwalled carbon nanotubes nanocomposite on a glassy carbon electrode (NiPcMWCNTs-GCE) in four different electrolytes were investigated. The successful synthesis of the NiPcMWCNTs nanocomposite was confirmed by UV/vis electrode spectroscopy, SEM, TEM, EDX, and XRD techniques. The supercapacitive behaviors of the modified electrodes were examined in PBS, H2SO4, Na2SO4, and SAB electrolytes via CV and EIS techniques. The highest specific capacitance of 6.80 F g−1 was achieved for the GCE-NiPcMWCNTs electrode in 5 mM [Fe(CN)6]4−/3− prepared in 0.1 M PBS (pH 7). Charge transfer resistance Rct values of 0.06, 0.36, 0.61, and 1.98 kΩ were obtained for the GCE-NiPcMWCNTs in H2SO4, SAB, Na2SO4, and PBS electrolytes, respectively. Power density values, otherwise known as the “knee” frequency f°, of 21.2, 6.87, 2.22, and 1.68 Hz were also obtained for GCE-NiPcMWCNTs in H2SO4, Na2SO4, PBS, and SAB electrolytes, respectively. GCE-NiPcMWCNTs demonstrated the fastest electron transport capability and the highest power density in H2SO4 compared to the other electrolytes. Hence, GCE-NiPcMWCNTs-modified electrodes had high stability, high energy and power densities, and a large specific capacitance.

Electrochemical hydrogen storage capacities of sol-gel synthesized Dy3Fe5O12/DyFeO3 nanocomposites: Schiff-base ligand-assisted synthesis and characterization

The nanostructured multiferroic Dy-Fe-O electrode materials for hydrogen storage request are synthesized via H2Salbn assisted sol-gel procedure. H2Salbn Schiff-base ligand plays the dual role of capping agent and fuel. The synthesis parameters affect the purity of obtained samples to form pristine DyFeO3, DyFeO3/Dy3Fe5O12 and Dy3Fe5O12/DyFeO3 compounds. Electrochemical attributes of resulting products are discovered by CV and charge-discharge chronopotentiometry techniques. The discharge capacity for DyFeO3/Dy3Fe5O12 nanocomposites by a high amount of DyFeO3 in the composite texture measured 447 mAhg−1 at a current of 1 mA. However, the discharge capacity for nanocomposites of Dy3Fe5O12/DyFeO3 with a high amount of Dy3Fe5O12 in the composite texture is considered about 257 mAhg−1 at a current of 1 mA. According to the found consequences, the DyFeO3/Dy3Fe5O12 nanocomposites verify appropriate capacity as the probable and capable active material for hydrogen storage policies.

Electrochemical Sensing of Dopamine and Epinephrine Using Self‐assembled Fe3O4 Magnetic Nanoparticles on a Pyridine‐grafted Glassy Carbon Electrode

AbstractA magnetic nanomaterial based electrochemical sensor was developed by immobilizing Fe3O4 nanoparticles (ca. 12 nm d.) on a pyridine molecule grafted glassy carbon electrode (Py‐GCE) for the selective and sensitive determination of two important neurotransmitters, dopamine (DA) and epinephrine (EP) at neutral pH. The synthesised Fe3O4 magnetic nanoparticleswere characterized by FTIR, UV‐Vis, TEM, XRD and XPS methods, whereas thefabricated electrodeswere characterized by using SEM, ATR‐FTIR, CV and EIS techniques. Differential pulse voltammetry was used for the determination of DA and EP in the linear range of 0.2 to 1.2 μM with the detection limits (S/N=3) of 0.34 nM and 0.61 nM, respectively. The sensor electrode exhibited high stability, reproducibility, good selectivity in the presence of potential interfering agents viz. ascorbic acid, uric acid, citric acid, glucose, etc. Theproposed method was successfully applied for the simultaneous determination of DA and EP in human blood sample and the recovery result was excellent.

V2O5@RuO2 core–shell heterojunction nano-arrays as electrode material for supercapacitors

V2O5 nanobelt arrays (VNBs) are directly synthesized on porous nickel as the primary structure, and then the VNBs are completely covered by RuO2 nanosheets (RNSs) as the secondary structure to create a core–shell heterojunction. The as-prepared VNBs@RNSs core–shell heterojunction is systematically researched through SEM, EDS, XRD, XPS and TEM, and the growth process is investigated in detail by sampling at different time. The VNBs@RNSs has a superb specific capacitive value of 971F g−1 at a voltage scanning speed of 5 mV s−1, a better cyclic steadiness of 80.4 % after recycling 10,000 times, a small charge transferring resistance value of 1.8 Ω and a fast effective diffusion coefficient of 1.01 × 10−8 cm2 s−1 calculated by CV, GCD, AC impedance and CA electrochemical techniques in a three-electrode testing system. A symmetrical electrochemical capacitor assembled by the as-prepared VNBs@RNSs electrode material has a superior energy density of 174.2 W h kg−1 at a power density of 450 W kg−1 and still retains 95.9 W h kg−1 at 9000 W kg−1 in a two-electrode testing system. The improved supercapacitive performance makes the VNBs@RNSs as a superior electrode material for supercapacitor.

The Modified Glassy Carbon Electrode by MWCNTs-PLL to Detect Both Paracetamol and Ibuprofen in Human Biological Fluid

The MWCNTs-PLL material was effectively synthesized in this study. The UV–vis spectrum and FT-IR spectroscopy are used to determine the structure of nanoparticles. The electrochemical characteristics of glassy carbon electrodes (GCE) were examined after the MWCNTs-PLL material with nanosized particles was dropped onto its surface to create MWCNTs-PLL/GCE. Furthermore, employing electrodes, PAR and IBU were examined via applying CV and DP-ASV techniques. In comparison to employing the bare GCE, the modified MWCNTs-PLL/GCE electrode showed good responsiveness toward PAR and IBU applying the DP-ASV technique, with LODs were 0.40 for PAR, 0.34 μM for IBU. The linear concentrations ranged from 1.0 to 210 μM. These factors like Na+, SO4 2−, CO3 2−, K+, Ca2+, Cl−, Mg2+, NH4 +, NO3 − ions, uric acid, oxalate and AA, did not interfere during the modified electrode’s operation. Within this paper, it is worth emphasizing that these analytical processes for the PAR and IBU in practical sample solutions are more dependable than the HPLC tool. Additionally, this work would be considered the state-of-the-art study for both using MWCNTs-PLL to simultaneously determine PAR and IBU, and employing successfully the cheap, fast, reliable method.

Fe(II)-Based Metallo-Supramolecular Polymer Film as a Sensing Material for the Detection of Nitrite

In this work, we report the synthesis of a mono metallic supramolecular polymer for constructing a new nonenzymatic electrochemical nitrite sensor. Metallo supramolecular polymer have been prepared by the complexation reaction of a ligand bearing terpyridine moieties [4′,4′′′′-(1,4 Phenylene) bis (2,2′:6′,2′′-terpyridine] with Fe(II) salts (Fe salt: Ligand-1:1) (polyFe). The polyFe was characterized with the UV/Vis titration and FTIR. The glassy carbon electrode (GCE) was used for fabricating ployFe_GCE via a drop casting method that was used for detecting nitrite through the oxidation process. The kinetics of the irreversible oxidation mechanism was studied using scan rate. Amperometry and CV techniques were used for studying the effectiveness of the polyFe_GCE for detecting nitrite at different concentrations. The polyFe_GCE was also used for interference, reproducibility, and stability study. We utilized the proposed sensor further for analyzing nitrite in tap water. The recovery obtained was satisfactory with relatively low value of standard deviation.

Si-containing 3D cage-functionalized graphene oxide grafted with Ferrocene for high-performance supercapacitor application: An experimental and theoretical study

In this work, graphene oxide sheets were functionalized with Octa(aminopropyl)silsesquioxane. Then, Octa(aminopropyl)silsesquioxane-functionalized graphene oxide (GO-Amine-SSQ) was grafted with Ferrocene through Friedel-Craft reaction. Structural properties of the prepared composite (GO-Amine-SSQ-Fc) were analyzed by XPS, FT-IR, XRD, Raman, SEM, TEM, and BET tests. Results confirmed the successful synthesis and high porosity. Next, the electrochemical properties of GO-Amine-SSQ-Fc were characterized by CV, GCD, and EIS techniques in the 3E system. The GO-Amine-SSQ-Fc electrode showed a specific capacitance of 574 F g−1 at 1 A g−1, retention capacitance of 90.1% after 10,000 charge-discharge cycles, low resistance, and efficient diffusion of ions. After confirming the excellent electrochemical performance of this electrode, a symmetric supercapacitor system (GO-Amine-SSQ-Fc//GO-Amine-SSQ-Fc) was tested by CV and GCD techniques, to determine practical application of system. GO-Amine-SSQ-Fc//GO- Amine-SSQ-Fc system recorded a specific capacitance of 304 F g−1 at 0.5 A g−1, retention capacitance of 92.5% over 10,000 charge-discharge cycles, and specific energy of 10.14 Wh kg−1 at a specific power of 500 W kg−1. Also, the results of computational methodology show that the interaction of SSQ, Fc and GO layer in GO-Amine-SSQ-Fc composite, makes it effective as an electrode material for supercapacitors. This excellent performance, as a result of the unique structure of Amine-SSQ groups and the superior electrochemical behavior of Ferrocene groups, suggests that GO-Amine-SSQ-Fc composite has great potential for energy storage devices.

MoS2 QDs-nanoparticle-engineered based hydrophobic filter for high performance water-oil separation

• A novel hydrophobic AC/MoS2 QDs/SSM filter for separation oil–water emulsion. • Preparation by economical materials, simple and one step hydrothermal method. • High selectivity, high flux and high recyclability. The demand for the development of inexpensive and effective approaches for the oil–water separation is increasing due to the global concern in oil industries. In this study, we synthesized nano porous activated carbon (AC)/ Molybdenum disulfide (MoS2) quantum dots (QDs) stainless still mesh (SSM) as a hydrophobic and oleophilic nano filter by hydrothermal method in one step in 200 °C for 12 h, which was characterized by various XRD, FTIR, SEM/Map, TEM, BET-BJH, CV, AFM, DLS and PL techniques. The results showed that the solvent type was also effective in the amount of its separation from oil. Further, the effect of water-to-solvent ratio and pH was investigated. Based on the results of petrol with a water-to-solvent ratio of 20/20 at pH = 7 and at a time of 10 s, 99.99% was separated by AC/MoS2 QDs/SSM. The results showed that repeatability cycle of the AC/MoS2 QDs/SSM was 23 times and its duration to 30 s. The results of kinetic studies revealed that the Pseudo second order kinetic model was in good agreement with the experimental data. This novel filter demonstrated an excellent separation with high selectivity, good flux > 6000 L/m 2 h and high repeatability with great durability from low cost materials and simple method that was appropriate for treating stratified water–oil and water in oil emulsion without using demulsifier.

Three-dimensional activated carbon nanosheets modified by graphitized carbon dots: One-step alkali pyrolysis preparation and supercapacitor applications

Supercapacitor is a new type of energy storage device, which has the advantages of high-power property and extraordinary life cycle. Herein, three-dimensional activated carbon nanosheets (3-D ACNs) modified with graphitized carbon dots (GCDs) is proposed as a promising electrode material for the supercapacitor. The 3-D ACNs/GCDs are prepared by one-step pyrolysis strategy with the assistance of alkali (KOH) from an organic molecular precursor of Span 20. The crystal structure, morphology, pore structure of the product is investigated by XRD, SEM/TEM and BET techniques, respectively. The capacitive performances of the electrode are studied by CV and CDC techniques. The 3-D ACNs/GCDs product has a well 3-D porous structure and high specific surface area of 1328 m2 g−1. The capacitive performances of the 3-D ACNs/GCDs electrode material are satisfactory, revealing a high specific capacitance (202.9 F g−1 at 1 A g−1) and good rate performance (144.2 F g−1 at 5 A g−1) in three-electrode test system, as well as long cycle stability (93.2% or 87.7% capacitance retention after 2000 or 6000 cycles) in two-electrode symmetric supercapacitor.

Pseudo-Crown ether II: Intracellular and solution-, SiNPs based test-kits for ppm level detection of H2S gas

Perylene diimide based pseudo-Crown ether derivatives have been synthesized and characterized and their photophysical properties towards Fe3+ and H2S in 50% HEPES buffer–CH3CN and CH3CN solutions have been studied. PDI 1 showed formation of supramolecular aggregates with nanorods (dimer) morphology. Upon addition of Fe3+ ions, nanorods of PDI 1 transformed to spheres and PDI 1/2 showed a decrease in absorbance at (542 nm) and emission (578 nm) intensities supported by Job's plot, DLS, CV, WXRD and NMR techniques. The detection limits for Fe3+ are as low as 0.6 μM. We utilized PDI 1+Fe3+ complex as an ensemble for detection and discrimination of bio thiol derivatives. Upon addition of H2S (7.5 μM) and Cys (19 μM), the ensemble showed an increase at 542/578 nm (‘OFF-ON’) and further addition of H2S/Cys caused a decrease at same wavelength (‘ON-OFF’) with formation of new absorbance band at 630 nm (‘OFF-ON’). The mechanism of interaction of H2S involves reduction of Fe3+ to Fe2+ ions, followed by binding of HS− to form (PDI 1+Fe2++HS) complex. PDI 1 and PDI 1+Fe3+ complex has been successfully utilized for bioimaging of Fe3+ ions and H2S, respectively in live MG-63 cells. The solution and silica NPs based colorimetric test-kits were fabricated and detection of 30–60 ppm H2S gas has been achieved. These ‘OFF-ON-OFF’ and ‘ON-OFF-ON’ molecular switches mimic functioning of IMPLICATION, AND logic gates.

Development of Noval Electrocatalyst Based on Graphene Supported Palladium‐Cobalt Nanoparticles as Hydrogen Evolution Catalyst for the Cost Effective Production of Hydrogen from Methanol

AbstractProduction of hydrogen using conventional water electrolysis is not the convenient and effective way due to slow oxidation evaluation at the anode electrode. Electroreforming of organic substances such as methanol to generate hydrogen has been considered an innovative strategy. Herein, graphene (G) supported Pd3−Co1 (Pd3−Co1/G) catalyst was synthesized and employed as cathode catalyst to facilitate hydrogen evolution reaction (HER) in the electrochemical methanol reformation (ECMR) process. The structural characteristics of synthesized Pd3−Co1/G were determined by FE‐SEM, HR‐TEM, EDX, XRD, FT‐IR, UV, XPS, and ICP‐OES techniques. Furthermore, the electrocatalytic behavior of the proposed catalyst was evaluated by CV, LSV and EIS techniques in 0.5 M H2SO4. Electrochemical studies revealed that Pd3−Co1/G exhibited a large electrochemically active surface area (120 m2 g−1), good long‐term stability, low Tafel slope value (46 mV dec−1) and small Rct value (12 Ω). The practical utility of the developed catalyst towards hydrogen production in ECMR cell was tested at various experimental conditions using membrane electrode assemblies (MEAs) which were prepared using commercial Pt−Ru/C as anode and Pd3−Co1/G as cathode electrocatalysts respectively. The synthesized Pd3−Co1/G electrocatalyst exhibited superior cell performance for 50 h at 60 °C cell temperature with a cell voltage and current density of 0.58 V and 150 mA cm−2, respectively. The improvement in electrocatalytic activity could be attributed to alloying Pd with Co and the use of G as carbon support, which in turn enhanced the HER activity of Pd. Hence, the prepared Pd3−Co1/G can be used as an alternative to cathode electrocatalyst for HER in ECMR cells.

Ultra-trace detection of caffeine and theophylline with high sensitivity and selectivity using Gd2(MoO4)3 nanosheets

In this study, gadolinium molybdate, Gd2(MoO4)3 (Gam) nanosheets have been substantially synthesized using a hydrothermal method with varying reaction temperatures. PXRD, XPS, and HR-TEM confirmed the crystal phase and morphology of Gam nanosheets. According to CV, LSV, and EIS techniques, Gam (synthesized at 150 ℃) modified GCE possesses excellent electrochemical properties and further has been used for caffeine and theophylline detection. The limit of detection of caffeine was found to be 4.1 nM with a linear range of 0.01 – 0.1 μM and 0.2 – 1.6 μM. Limit of detection of theophylline was calculated to be 11.9 nM with a linear range of 0.03 – 1.5 μM and 2.0 – 4.5 μM. Gam modified GCE was applied for caffeine and theophylline detection in green tea leaves (GS-1) and coca (CS-2) samples and interestingly found capable for caffeine detection without spiking. After spiking, recoveries of caffeine and theophylline in GS-1 were achieved 100.6 – 101.7% and 102.57–105.21% respectively. In CS-2 the recoveries for caffeine and theophylline were found to be 98.3 – 101.8% and 97 – 99.33% respectively. The excellent long-term stability, recyclability, and real sample analysis validated the sensor for biological as well as pharmaceutical samples diagnosis.

The Production and Evaluation of an Electrochemical Sensors for Strychnine and Its Main Metabolite Strychnine N-Oxide for Their Use in Biological Samples.

Strychnine (STN) and its major metabolite Strychnine N-Oxide (SNO) were examined electrochemically. Both parent compounds and its major metabolite showed electroactivity on glassy carbon electrodes using CV and DPV techniques. One oxidation peak at 1008 mV was observed for STN with the optimum peak intensity at pH 7. SNO produced two oxidation peaks, at 617 mV and 797 mV, at pH 5. The peaks demonstrated irreversible behaviour and the irreversibility of the system was confirmed at different scan rates. A calibration curve was produced for both CV and DPV measurements and the sensitivity of the proposed EC method was good compared with previous electrochemical and non-electrochemical methods. The precision of oxidation peak of STN using the STN-MIP method produced a maximum value of 11.5% and 2.32% for inter-day and intraday %RSD, respectively. The average% recovery was around 92%. The electrochemical method has been successfully applied to the determination of STN in spiked plasma and urine samples. For SNO, both anodic peaks of SNO demonstrated irreversible behaviour. A different sweep rate was used for calculating the number of ‘transfer electrons’ in the system; based on this, the mechanism of oxidation reaction was proposed. Calibration curves for both oxidative peaks were produced using DPV measurements. The second anodic peak demonstrated high linearity and precision with %RSD < 1.96%.

Phosphorescent Complexes of {Mo6I8}4+ and {W6I8}4+ with Perfluorinated Aryl Thiolates featuring Unusual Molecular Structures

AbstractA series of six novel cluster complexes [M6I8(SArf)6]2− (M=Mo or W; SArf=p‐SC6F4‐C6F5, p‐SC6F4Cl, or p‐SC6F4CF3) was prepared by exchange reactions between [Mo6I14]2− or [W6I14]2− and silver salts of the corresponding thiols and characterized by X‐ray single‐crystal diffraction and elemental analysis, NMR, ESI‐MS, and CV techniques. In the crystal structures all the thiolate ligands adopt an idiosyncratic orientation along one of the idealized three‐fold axes passing through two opposite μ3‐I ligands and the centers of two opposite faces of the M6 octahedra. This leads to shortened intramolecular C⋅⋅⋅I distances inside the cluster below 3.5 Å. The clusters exhibit red photoluminescence with relatively high quantum yield, up to 0.42 in the case of (Bu4N)2[W6I8(SC6F4CF3)6]. Moreover, all the compounds exhibit X‐ray luminescence; the close values of the maxima in the photo‐ and X‐ray induced emission spectra indicate that the luminescence is cluster‐centered.

Development of Palladium on Bismuth Sulfide Nanorods as a Bifunctional Nanomaterial for Efficient Electrochemical Detection and Photoreduction of Hg(II) Ions.

A nanocomposite containing palladium nanoparticles embedded on bismuth sulfide nanorods (Pd@Bi2S3) was synthesized based on a solvothermal method. The structural features, composition, and morphology were characterized by XRD, FT-IR, FE-SEM-EDS, FE-TEM, HAADF-STEM, XPS, N2 physisorption, and UV-vis. Further electrochemical measurements by EIS, CV, DPV, and LSV techniques were done. It revealed that Pd@Bi2S3/GCE were exploited as electrochemical sensors for the detection of toxic mercuric ions (Hg2+), which provides a wide linear range of 0.049-445 μM, excellent sensitivity of 1.17 μA μM-1 cm-2, and detection limit of 13.5 nM. The modified electrode has also been successfully applied for the detection of Hg2+ in sea fish, river fish, and water samples. The Pd@Bi2S3/GCE signifies a robust, usability, and highly effective method for trace level detection of Hg2+ ions. Furthermore, these Pd@Bi2S3 bifunctional catalysts were discovered to have good photoreduction activity for Hg2+ ions upon the visible-light irradiation.

Enhanced electrochemical sensor and photodegradation of industrial wastewater by Almond gum assisted synthesis of Bi2O3/MgO/Fe2O3 nanocomposites

The present investigation focused on a development of Bi2O3/MgO/Fe2O3 (BMF) heterojunction nanocomposites by Almond gum mediated green solution combustion process. The optical and structural characterizations of nanocomposite-photocatalysts were studied by spectral techniques; P-XRD study confirms the phase formation and crystalline nature of NPs with its average particle size was found to be 28 ​nm. The surface morphology of synthesized nanocomposites comprises visible pores, voids and agglomeration obtained by SEM technique. The effective potential investigation of prepared BMF nanocomposite-graphite paste electrode in 0.1 ​M KCl solution was achieved using electrochemical analysis (CV and EIS techniques) in the different scan rates 0.01–0.05 ​V/s. Further, the sensor activity of BMF material was examined first time towards paracetamol sensor studies in alkaline medium for quantities of 1–5 ​mM concentrations. The photocatalytic degradation activity was carried out for 20 ​ppm of Fast Orange Red (FOR) dye with 50 ​mg of BMF nanocomposite under irradiation of UV light. These analysis initiates to provide some insights into the design of material for multifunctional long-term applications for environmental clean-up.

Aging impact of Se powder on the electrochemical properties of Molybdenum selenide: Supercapacitor application

In the present report, we have studied the impact of aging on selenium (Se) powder in hydrazine hydrate (act as reducing agent) during synthesis of pure molybdenum selenide (MoSe2) material. The MoSe2 as electrode material is prepared via single-step hydrothermal technique with aging Se powder in reducing agent for zero, one, and three days. The structural, microstructural, and chemical nature analysis of the samples was done via XRD, FESEM, and FTIR tools whereas the electrochemical study was performed via CV, GCD, and EIS techniques. The optimized material coded as M 39 (three days aged sample with pH 9) shows a high specific capacitance (Cs) of 368 F g−1 at the current density of value 0.5 A g−1 along with an energy density of 51 Wh kg−1 and power density of 250 W kg−1. Based on the electrode's electrochemical outcomes, it may be indicated that the electrochemical performance of MoSe2 material upsurges as the aging of Se increases from zero to three days. From the obtained results it is could be predicted that the M 39 material may stand appropriate for commercial supercapacitors.

Bis-triazolylchalcogenium-Functionalized Benzothiadiazole Derivatives as Light-up Sensors for DNA and BSA.

A range of bis-triazolylchalcogenium-BTD 3 was synthesized by a copper-catalyzed azide-alkyne cycloaddition of azido arylchalcogenides 1 and 4,7-diethynylbenzo[c][1,2,5]thiadiazole 2. Eight new compounds were obtained in moderate to good yields using 1 mol % of copper(II) acetate monohydrate under mild reaction conditions. In addition, the synthesized bis-triazolylchalcogenium-BTD 3a-3h were investigated regarding their photophysical, electrochemical, and biomolecule binding properties in solution. In general, compounds presented strong absorption bands at the 250-450 nm region and cyan to green emission properties. The redox process attributed to the chalcogen atom was observed by electrochemical analysis (CV techniques). In addition, spectroscopic studies by UV-vis, steady-state emission fluorescence, and molecular docking calculations evidenced the ability of each derivative to establish interactions with calf-thymus DNA (CT-DNA) and bovine serum albumin (BSA). The behavior presented for this new class of compounds makes them a promising tool as optical sensors for biomolecules.