Copper phthalocyanine has been prepared by simple chemical approach and its structural and optical properties were investigated. X-ray diffraction pattern exhibits a notable peak at 2 θ = 6.75 ° assigned to the α − phase of CuPc. SEM images show the particles distributed in nanospheres with average size at about 50 nm. The linear optical constants like optical band gap ( E g ) and dielectric constants ( ε ′ , ε ″ ) were estimated from transmittance and reflectance spectra in the wavelength range from 250 to 900 nm. The energy gap was found to be 1.62 and 2.90 eV dependent on the incident photon energy. Al/CuPc/n-Si/Al Schottky diode has been fabricated using thermal evaporation technique. The electronic parameters such as the ideality factor ( n ) , series resistance ( R s ) , and barrier height ( ϕ b ) were evaluated in dark by applying the (I–V), Cheung-Chung, and Norde models. At various illumination intensities, the photocurrent sensitivity was studied based on the response of trapped charge carriers. At 1 Mhz, the built-in voltage ( V b i ) and donor concentration ( N d ) were calculated from (C–V) measurements. The findings revealed that CuPc/n-type Si can be used as photodiode in optoelectronic applications.

A new chemically optimized screen-printed electrode modified with a cobalt-doped α-Mn₂O₃ nanostructure on carbon nanotube paste (α-Mn₂O₃:Co@CNTs) has been constructed for the recognition of cyclobenzaprine hydrochloride.

In the present work, a novel sensitive electrochemical carbon paste electrode chemically modified with yttrium doped manganese oxide Mn 2 O 3 /Y 2 O 3 nanostructures was assigned for determination of marbofloxacin (MRB) using square wave voltammetry (SWV) method. MRB has a broad spectrum of bactericidal activity for the treatment of urinary, respiratory and dermatological diseases in bovines and their retention in animal meats and milk leads to adverse side effects for the consumer. Thus a rapid estimation of minor concentrations of MRB has exerted a great concern to ensure food safety. XRD, EDX, Raman spectroscopy, SEM, and TEM techniques were employed to characterize the samples. The electrochemical oxidation behavior of MRB shows irreversible anodic peak at 1.10 V vs Ag/AgCl, in Britton-Robinson buffer (BR) at pH 5.0. The relationship was rectilinear over the range 10 × 10 −9 -1.0 × 10 −4 M between the peak current and its related concentration with a minimum detection limit of 2.4 × 10 −9 M. The developed method was green chemistry challenges and successfully applied to assay the drug in its dosage form, bovine meat and milk samples with a good recovery lies between 94.56% and 105.33% with relative standard deviation less than 10%.

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Researchers worldwide have been looking forward to using novel ways to purify fresh water containing pollutants and disease vectors.

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Nitroanilines are environmentally toxic pollutants which are released into aquatic systems due to uncontrolled industrialization. Therefore, it is crucial to convert these hazardous nitroanilines into a harmless or beneficial counterpart. In this context, we present the chemical reduction of 4-nitroaniline (4-NA) by NaBH 4 utilizing Prussian blue analogue (PBA) as nanocatalyst. PBAs can serve as inexpensive, eco-friendly, and easily fabricated nanocatalysts. PBA cobalt tetracyanonickelate hexacyanochromate (CoTCNi/HCCr) was stoichiometrically prepared by a facile chemical coprecipitation. Chemical, phase, composition, and molecular interactions were investigated by XRD, EDX, XPS, and Raman spectroscopy. Additionally, SEM and TEM micrographs were utilized to visualize the microstructure of the nanomaterial. The findings revealed the synthesized PBA of the cubic phase and their particles in nanosheets. The band gap was estimated from the optical absorption within the UV−vis region to be 3.70 and 4.05 eV. The catalytic performance of PBA for the reduction of 4-NA was monitored by UV−vis spectroscopy. The total reduction time of 4-NA by PBA was achieved within 270 s, and the computed rate constant (k) was 0.0103 s −1 . The synthesized PBA nanoparticles have the potential to be used as efficient nanocatalysts for the reduction of different hazardous nitroaromatics.