A Green and Simple Route for the Controlled-Size Synthesis of Gold Nanoparticles Using Preyssler Heteropolyacid

Abstract

The authors describe a facile procedure for size-controlled synthesis of gold nanoparticles based on the reduction of Au 3+ (HAuCl 4 ) using Preyssler heteropolyacid (H 14 [NaP 5 W 30 O 110 ]) under UV irradiation. Preyssler plays the role of green reducing agent and also efficient stabilizer. This method allows the synthesis of uniform hexagonal nanoparticles with an average size that is tunable between 1.35 and 86.7 nm by varying the gold ion concentration, molar ratio of gold ion to Preyssler, and Propan-2-ol amount. The authors found that there is a critical ratio for [Au 3+ ]/[Preyssler] in which two opposing trends in the size of nanoparticles would happened.

H3PMo12O40‐immobilized chitosan/Co3O4: A novel and recyclable nanocomposite for the synthesis of pyrimidinedione derivatives

“…In the past decade, the use of heteropolyacids (HPAs) and related polyoxometalate compounds in the structure of catalysts has been employed in many selective transformations of organic substances . The supported HPA catalysts have several advantages, such as strong Brønsted acidity, higher stability, low toxicity and high catalytic activity, which make them economically and environmentally attractive in studying the catalytic process …”

Synthesis and Characterization of Au NPs/Molybdophosphoric Acid/CNT Tricomponent Nanohybrid

“…In our previous works, Preyssler acid [34][35][36], molybdophosphoric acid [37] and vanadium-substituted mixed addenda (H 3+x [PMo 12-x V x O 40 ], (x=0-3)) [38] were introduced as remarkable reducing agents and effective stabilizers for the synthesis of gold nanostructures. It has been found that molybdophosphoric acid (H 3 [PMO 12 O 40 ], HPMo) has a high oxidation potential and it is an effective POM in the size controllable synthesis of Au NPs.…”

Magnetic EDTA Functionalized Preyssler Cross Linked Chitosan Nanocomposite for Adsorptive Removal of Pb(II) Ions

“…According to the importance of chitosan as an adsorbent, Tanhaei et al recently introduced a novel HPAs grafted magnetic chitosan composite for the adsorption of methyl orange. The Preyssler acid (H 14 [NaP 5 W 30 O 110 ]) was used as a type of HPAs with high hydrolytic (pH 2–12) and thermal stability, non‐corrosiveness, reusability and greenness properties .…”