Green synthesis of Pd/CuO nanoparticles by Theobroma cacao L. seeds extract and their catalytic performance for the reduction of 4-nitrophenol and phosphine-free Heck coupling reaction under aerobic conditions

Pd nanoparticles synthesized in situ with the use of Euphorbia granulate leaf extract: Catalytic properties of the resulting particles

“…A mechanism of polyol oxidation has been shown in Figure 6. These are in agreement with our previous findings [19][20][21][22][23][41][42][43][44][45][46]. Figure 7 shows the UV-vis spectrum of in situ green synthesized Pd NPs using aqueous extract of Euphorbia granulate which the progression of the reaction, formation and stability of Pd NPs were controlled.…”

“…Phenolics could be adsorbed on the surface of metal nanoparticles, possibly by interaction through π-electrons interaction in the absence of other strong ligating agents. These properties have already been exploited for the preparation of Pd NPs, Cu NPs, Au NPs, Au/Pd NPs, TiO 2 NPs, CuO NPs, Pd/CuO in our previous studies [19][20][21][22][23][41][42][43][44][45][46]. A mechanism of polyol oxidation has been shown in Figure 6.…”

“…Among these metabolites polyphenolic constituents especially flavonoids have demonstrative biological characteristics mainly antioxidant properties. Following the definition of antioxidant as reducing agent they have enough potential for reducing the metallic ions to zero valent (nano) state, therefore; recently, we have actively been working on the use of plants extracts for the synthesis of metallic and bimetallic nanoparticles [19][20][21][22][23].…”

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

“…The flowers are white with a prominent yellow center [25][26][27][28][29]. Due to our ongoing interest on the biosynthesis of metal nanoparticles and heterogeneous catalysts [30][31][32][33][34][35][36][37][38][39][40], we wish to report a simple and effective protocol for preparation of CuO NPs by using Anthemis nobilis flowers extract as a reducing and stabilizing agent. Also, the catalytic activity of CuO NPs for the A 3 coupling reaction was studied.…”

A Green Strategy to Synthesize Environment Friendly Metal Oxide Nanoparticles for Potential Applications – A Review

“…It contains phytochemicals such as alkaloids, tannins, flavonoids, phytosterols, phenols, terpenes, and carbohydrates [49]. Theobroma cacao L. seeds belonging to Sterculiaceae family have bioactive compounds such as powerful flavonols and antioxidants as either the monomers or oligomers which act as capping agent and deter the aggregation of NPs [50].…”