nanosilica periodic acid (nano-spia) is found to be a new, powerful, and reusable heterogeneous catalyst for the rapid synthesis of 2-naphtholazo dyes via diazotization of aromatic amines and followsazo coupling with 2-naphthol under solvent-free conditions at room temperature by grinding. eco-friendly, heterogeneous reaction conditions, high stability of diazonium salt, simple experimental pro...

Abstract Nanotechnology is widely used in construction to advance high performance and durability materials, as represented by concrete, which nanomaterials such nanosilica (SiO 2 ), nano-alumina (Al O 3 nanotitanium oxide (TiO ) are replace cement a partial binder. Suitable amounts of adding these beneficial with regard the mechanical, economic, environmental aspects concrete.

Innovative tissue engineering biomimetic hydrogels based on hydrophilic polymers have been investigated for their physical and mechanical properties. 5% to 25% by volume loading PHEMA-nanosilica glassy hybrid samples were equilibrated at 37 °C in aqueous physiological isotonic hypotonic saline solutions (0.15 0.05 M NaCl) simulating two limiting possible compositions of extracellular fluids. Th...

Abstract Rice straw is made up of hemicelluloses (19–27%), celluloses (32–47%), lignin (5–24%), and ash (13–20%), which are all agricultural waste. considered a green/eco-friendly source silicon dioxide (SiO 2 ). This study focuses on the synthesis characterization different mesoporous SiO nanostructures derived from rice waste material through controlling pH extraction process for first time. ...