FTIR and multivariate analysis to study the effect of bulk and nano copper oxide on peanut plant leaves

AbstractIn this article the potential variation in biochemical constituents of peanut plant leaves affect by presoaking peanut seeds in copper oxide nanoparticles suspension has been studied and compared with its bulk counterpart. The synthesized nanoparticles were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) studies. The Fourier transform infrared (FTIR) analysis shows the most prominent peaks at ∼2923 cm−1, ∼1636 cm−1 and ∼1033 cm−1, which correspond to lipids, protein and carbohydrate content in leaf samples respectively. The calculated mean ratio of the peak intensities for various frequency regions and total band area calculation for various band regions explain the variation in lipid, protein and carbohydrate content of leaf samples. Further the FTIR spectra were processed by de-convolution and curve fitting to quantitatively examine the chemical contents and structure changing of the secondary structure of protein. The calculated integrated band area of β – sheet, β – turn and α – helix secondary structure of protein varies to greater extent in all samples compared to control. Principal component analysis (PCA) has been carried out to explain the total variance in secondary structure of protein content in peanut plant leaves. Principal component 1 (PC1) accounts for 63.50% variation in secondary structure of protein whereas principal component 2 (PC2) accounts for 29.56%. The application of nanoparticles via presoaking method implies potential variation in biochemical constituents but doesn't affect the growth of plants considerably

Design and characterization of non-toxic nano-hybrid coatings for corrosion and fouling resistance

AbstractEpoxy resin modified with nano scale fillers offers excellent combination of properties such as enhanced dimensional stability, mechanical and electrical properties, which make them ideally suitable for a wide range of applications. However, the studies about functionalized nano-hybrid for coating applications still require better insight. In the present work we have developed silane treated nanoparticles and to reinforce it with diglycidyl epoxy resin to fabricate surface functionalized nano-hybrid epoxy coatings. The effect of inorganic nano particles on the corrosion and fouling resistance properties was studied by various (1, 3, 5 and 7 wt%) filler loading concentrations. Diglycidyl epoxy resin (DGEBA) commonly was used for coating. 3-Aminopropyltriethoxysilane (APTES) was used as a coupling agent to surface treats the TiO2 nanoparticles. The corrosion and fouling resistant properties of these coatings were evaluated by electrochemical impedance and static immersion tests, respectively. Nano-hybrid coating (3 wt% of APTES–TiO2) showed corrosion resistance up to 108 Ω cm2 after 30 days immersion in 3.5% NaCl solution indicating an excellent corrosion resistance. Static immersion test was carried out in Bay of Bengal (Muttukadu) which has reflected good antifouling efficiency of the 3 wt% APTES–TiO2 loaded nano-hybrid coating up to 6 months

Improved photocatalytic performance of chitosan blended – Al2O3-TiO2 and garlic loaded – Al2O3-TiO2 hybrid nanocomposites

In this present study, biomaterials loaded/blended hybrid nanocomposites such as chitosan-blended Al2O3-TiO2 (CS-Al2O3-TiO2) and garlic-loaded Al2O3-TiO2 (G-Al2O3-TiO2) were synthesized by sol-gel method. They were characterized by various techniques such as XRD, UV-DRS, FTIR, FE-SEM, EDX and TG-DTA analysis. The photocatalytic activity of the CS-Al2O3-TiO2 and G-Al2O3-TiO2 was carried out using organic dyes such as Methylene blue (MB), Methyl orange (MO) and Rhodium B (Rh-B) under solar light. The antibacterial activity was done using the gram-negative bacteria Escherichia Coli (E. Coli). The comparison studies of photocatalytic and antibacterial activity between all the nanocomposites, such as TiO2, Al2O3-TiO2, CS-Al2O3-TiO2 and G-Al2O3-TiO2 were investigated. The order of photocatalytic and antibacterial activity was G-Al2O3-TiO2 > CS-Al2O3-TiO2 > Al2O3-TiO2> TiO2. The garlic loaded Al2O3-TiO2 nanocomposite shows a higher activity due to the presence of organic sulphur compounds. Followed by chitosan blended - Al2O3-TiO2 shows a remarkable activity due to the presence of an amine group present in chitosan composites

Effect of bulk and nano-Fe2O3 particles on peanut plant leaves studied by Fourier transform infrared spectral studies

The interaction of metal oxide nanoparticles with plants has not been extensively studied. An attempt has been made to examine the potential variation in peanut plant leaves due to the application of Fe2O3 nanoparticle by pre-sowing technique and to compare with its bulk counterpart. Fe2O3 nanoparticle was synthesized by chemical route and characterized using X-ray diffraction, atomic force and scanning electron microscopy. The Fe2O3 nanoparticle and its bulk counterpart are applied to the peanut seeds by pre-soaking method at two different concentrations: 500 and 4000 ppm. A total of three replicates were chosen for each morphological and physiological measurement (at an average of three plants per replica). The Fourier transform infrared spectral analysis shows the most prominent peaks at 2923 and 1636 cm−1, and other peaks vary due to Fe2O3 stress, which was confirmed by the calculated mean ratio of the peak intensities for various frequency regions. All leaf samples show considerable increase in glycoprotein, with 500 ppm bulk and 4000 ppm nano-Fe2O3 samples exhibiting a maximum increase of 73.86% and 71.45%, respectively. The total amide I and II protein content of leaf sample soaked in 500 ppm bulk Fe2O3 suspension decreased to a greater extent compared with other leaf samples. The leaf samples soaked in 500 ppm concentration of both bulk and nano-Fe2O3 suspension exhibited lower lipid content with total band area of 76.97 ± 0.832 and 76.31 ± 0.468, respectively. The cumulative percentage of explained variance in secondary structure of protein of all leaf samples is 83.888% in which factor 1 accounts for 51.870% and factor 2 accounts for 32.018% of the total data variance. The principal component (PC) loadings plot for the spectral range 1600–1700 cm−1 clearly shows that the PC1 factor might establish the maximum variation of the secondary structure of protein in leaf samples

2-(4-Methoxyphenyl)-1-phenyl-1H-benzimidazole

In the title compound, C20H16N2O, the 1H-benzimidazole ring forms dihedral angles of 48.00 (6) and 64.48 (6)°, respectively with the benzene and phenyl rings, which are inclined to one another by 58.51 (7)°. In the crystal, weak C—H...π interactions are the only intermolecular interactions present

1-Phenyl-2-[4-(trifluoromethyl)phenyl]-1H-benzimidazole

In the title molecule, C20H13F3N2, the benzimidazole unit is close to being planar [maximum deviation = 0.012 (1) Å] and forms dihedral angles of 31.43 (7) and 61.45 (9)° with the 4-(trifluoromethyl)phenyl and 1-phenyl rings, respectively; the dihedral angle between these rings is 60.94 (10)°. In the crystal, C—H...F hydrogen bonds link the molecules into chains along the c-axis direction. The CF3 group is rotationally disordered with an occupancy ratio of 0.557 (8):0.443 (8) for the F atoms

Heterojunction of Bentonite Clay supported Bi2O3/ZnO composite for the detoxification of azo dyes under UV-A light illumination

ABSTRACT: Cost effective precipitation and decomposition method was used for the successful synthesis of clay supported Bi-ZnO (CBZO). Synthesized CBZO was exemplified by Fourier transform infrared spectra (FT-IR), X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Diffuse Reflectance spectra (DRS), Photoluminescence spectra (PL), Energy Dispersive Spectrum (EDS), and BET measurements. The catalytic activity of CBZO was scrutinized for the detoxification of Reactive Yellow 84 (RY 84) & Trypan Blue (TB) dyes in an aqueous solution using UV-A light. The results show that CBZO is more efficient than Clay, Bi-ZnO, commercial ZnO, and bare ZnO at pH 9 for the degradation of RY 84 and TB dyes. Moreover, COD studies were proven the mineralization of dyes. Hence, thedegradation mechanism was developed for RY 84 and TB dyes degradation in the presence of UV-A light

1-Phenyl-2-p-tolyl-1H-benzimidazole

In the title compound, C20H16N2, the benzimidazole ring system forms dihedral angles of 28.50 (7) and 72.44 (7)° with the tolyl and phenyl rings, respectively. In the crystal, molecules are linked into chains along the a-axis direction by weak C—H...N interactions. The crystal structure also features C—H...π interactions