2results about How to "Strong electrostatic interaction" patented technology

The application provides a modified activated carbon for removing perchlorate in water for sheep farms and a preparation method thereof, relates to the field of water treatment, and the method carries out reaction on activated carbon in a citric acid aqueous solution, uniformly loads a carboxyl layer on the surface of the activated carbon, and obtains preliminarily modified activated carbon; carries out reaction on the preliminarily modified activated carbon in an alkaline polydimethyl diallyl ammonium chloride aqueous solution, and strong cation quaternary ammonium salt is adsorbed on the surface of the carboxyl layer through electrostatic action, thereby obtaining secondarily modified activated carbon; and carries out reaction on the secondarily modified activated carbon in a triethylenetetramine aqueous solution, so that triethylenetetramine molecules are further combined to the strong cation quaternary ammonium salt through electrostatic adsorption, thereby obtaining the modified activated carbon for removing perchlorate in water for sheep farms, the adsorption capacity of the activated carbon for solutes with negative charges is significantly enhanced, and the treatment efficiency of the overall farm environment on perchlorate is improved.

This invention discloses a carbon-coated raspberry-like SiO2 2 Nanomaterials, including carbon layers and modified raspberry-like SiO2 encapsulated within the carbon layers. 2 Nanomaterials with a carbon layer thickness of 10–300 nm and a surface roughness Ra of 10–100 nm, modified raspberry-like SiO 2 The nanomaterials exhibit positively charged groups on their surface under acidic conditions and have a particle size of 10–300 nm. This invention also discloses the aforementioned carbon-coated raspberry-like SiO₂. 2 The preparation method of nanomaterials first involves preparing raspberry-like SiO₂ with different roughness through weak alkaline etching. 2 Nanomaterials, and then prepare raspberry-like SiO 2 The nanomaterials are modified, hydrothermally carbonized, dried, and washed. This invention features a simple, low-energy-consumption, and environmentally friendly preparation process, resulting in a carbon layer that coats raspberry-like SiO₂. 2 Nanomaterials have rough surfaces, large specific surface areas, are rich in hydrophilic oxygen-containing groups, and have controllable carbon layer morphology, which can promote the efficient hydrolysis of cellulose into sugars in low-acid aqueous systems.