Nerium oleander leaves extract mediated synthesis of gold nanoparticles and its antioxidant activity

Biological applications of phytosynthesized gold nanoparticles using leaf extract of Dracocephalum kotschyi

“…As shown in Figures and , the morphology of biosynthesized AuNPs was nearly spherical in shape with small size, which was obtained by TEM and SEM analysis. A similar observation was found that spherical size is smaller than other morphologies . Some large images of biosynthesized AuNPs with triangle, pentagon and hexagon shapes were also observed.…”

“…For instance, previous reports have obtained AuNPs by using plant extracts at a longer incubation period, higher temperature, and greater ratio of plant extract to Au solution. For example, the incubation time was 5 hr for Nerium oleander leaf extract at 60°C, 5 hr for Piper longum fruit extract, 60 min for Moringa oleifera petals, and 30 min for Hovenia dulcis fruit extract, at room temperature. It was 2 hr for plant extract of Commelina nudiflora at 37°C .…”

“…[33][34][35][36] For instance, previous reports have obtained AuNPs by using plant extracts at a longer incubation period, higher temperature, and greater ratio of plant extract to Au solution. For example, the incubation time was 5 hr for Nerium oleander leaf extract at 60 C, 37 5 hr for Piper longum fruit extract, 17 60 min for Moringa oleifera petals, 38 and 30 min for Hovenia dulcis fruit extract, 39 at room temperature. It was 2 hr for plant extract of Commelina nudiflora at 37 C. 9 The fast reduction of HAuCl 4 to AuNPs in our work can be attributed to the most important phytochemical constituents present in D. kotschyi leaf extract containing the flavonoids (luteolin-7-O-glucoside, apigenin-7-O-glucoside (cosmosiin), luteolin 3 0 -O-β-D-glucuronide, luteolin, apigenin, cirsimaritin, iso-kaempferide, penduletin, xanthomicrol, and calycopterin) and a phenolic compound (rosmarinic acid).…”

Visible light photo catalytic inactivation of bacteria and photo degradation of methylene blue with Ag/TiO 2 nanocomposite prepared by a novel method

“…Based on our continuous study on the green synthesis of MNPs [43][44][45], we have synthesized Ag/TiO 2 nanocomposite by eco-friendly and non-toxic one step green synthetic method using plant extract as a reducing and stabilizing agent without using any surfactant. Additionally, the efficiency of Ag/TiO 2 nanocomposite against photo degradation of methylene blue and photo inactivation of bacteria was also studied in this report.…”

Enhanced chemocatalytic reduction of aromatic nitro compounds by biosynthesized gold nanoparticles

“…Various microorganisms including fungi [14][15][16], bacteria [17][18][19][20], and plants [21][22][23][24][25][26][27] have been extensively used for green syntheses Ag and Au nanoparticles. Natural resources have the capability to reduce metal ions into metal nanoparticles.…”