Evaluation of Antioxidant and Anticorrosion Properties of Epipremnum aureum

摘要

The practice of employing ornamental plants for biological applications has been increasing for quite some time. Herein, we had evaluated the phenolic content and antioxidative potency of Epipremnum aureum (E. aureum) leaves. The total phenol and flavonoid contents were found to be 125.21 and 52.22 mg g(-1), respectively, in methanolic E. aureum extract (EA-MeOH). Based on the known antioxidative activity of phenol, alpha,alpha-diphenyl- beta-picrylhydrazyl (DPPH 95%), nitric oxide (NO 90%), and hydrogen peroxide (H2O2 80 %) assays were performed, where the highest inhibition of free radicals was achieved with 100 mu g mL(-1) EA-MeOH. The anticorrosion performance of plant-based antioxidants has gained importance; hence, the anticorrosive effect of 100% EA-MeOH on low-carbon steel (LCS) in 1M H2SO4 was evaluated. The inhibition efficiency [eta(%)] was calculated based on weight loss and atomic absorption spectroscopy analyses. Surface analysis was carried out by Fourier transform infrared (FT-IR), UV-visible (UV-Vis) and X-ray diffraction (XRD). The results showed absorption bands at 3611.86, 3018.72, 1043.53, and 756.12 cm(-1) for FT-IR, absorbance bands at 221 and 251 nm for UV-Vis were observed in LCS inhibited in inhibitor (EA-MeOH). The maximum inhibition efficiency of 92.37% was achieved with 600 ppm of E. aureum extract in 1M H2SO4 at 300 +/- 1K. All these exhibit the formation of protective layer over the inhibited specimen by the inhibitor.