2results about How to "Preparation Process Green" patented technology

The application provides an amphiphilic carbon dot, a rapid dispersion ultra-stable foam system and a preparation method thereof, and belongs to the field of oil field chemistry, wherein the preparation method of the amphiphilic carbon dot comprises the following steps: dissolving cholic acid in a first solvent to obtain a hydrophobic phase precursor solution; dissolving chitosan oligomer in a second solvent to obtain a hydrophilic phase precursor solution; mixing the hydrophobic phase precursor solution and the hydrophilic phase precursor solution in a closed reactor, standing for 5-10 min, and performing phased microwave treatment: 180-220 W for 1-3 min, 450-550 W for 2-5 min, and 80-120 W for 4-8 min; cooling the reaction liquid to room temperature, and obtaining the amphiphilic carbon dot through filtration, dialysis and freeze-drying. Through the synergistic effect of the amphiphilic carbon dot and the surfactant, the application can realize rapid dispersion to form uniform foam, and can maintain the stability of the foam in a high-salt environment for a long time, thereby meeting the application requirements in a high-salt scene.

This invention discloses a method for preparing a TNTs / NiO@CoPi array electrode (TNCP) for photoelectrocatalytic water splitting, belonging to the field of photoelectrocatalytic new energy materials technology. The invention first prepares a highly ordered anatase TiO2 nanotube array (TNTs) using secondary anodic oxidation, then loads Ni nanoparticles onto the surface and inside the nanotubes via constant current electrodeposition, followed by high-temperature calcination to generate p-type NiO, constructing a TNTs / NiO p-n heterojunction (TN). Finally, it uses AM 1.5 simulated sunlight to selectively deposit an amorphous CoPi cocatalyst, where the CoPi only coats the NiO nanospheres without blocking the TiO2 mass transfer channels. This invention utilizes the p-n heterojunction to broaden the full-spectrum light absorption from 250 to 800 nm, and CoPi acts as a hole-trapping layer to suppress electron-hole recombination, significantly reducing interfacial charge transport impedance; the steady-state photocurrent of the TNCP deposition sample reaches 0.06 mA·cm⁻. 2 It is three times that of pure TNTs. This process involves no precious metals or highly toxic corrosive solvents, and the reaction conditions are mild. The electrodes produced can be used for photoelectric water splitting to produce hydrogen, photoelectric oxidation of organic pollutants, and ethylene glycol photoelectric fuel cells. They exhibit excellent cycle stability and have promising prospects for large-scale industrial applications.