2 results about "Methyl violet" patented technology

The application discloses a corn straw modified titanium dioxide photocatalyst, a preparation method and application thereof. The preparation method comprises the following steps: (1) crushing corn straw, calcining the crushed corn straw, and obtaining calcined corn straw; (2) mixing the calcined corn straw, ethanol and water to obtain a mixed solution A; mixing tetrabutyl titanate, glacial acetic acid and ethanol to obtain a mixed solution B; adding the mixed solution A into the mixed solution B to react, and then standing to obtain a gel; wherein the mass ratio of the corn straw to the tetrabutyl titanate is 0.05-0.15:100; wherein the mass of the tetrabutyl titanate is calculated based on the mass of completely formed titanium dioxide; (3) drying the gel to obtain a dry gel; and calcining the dry gel to obtain the corn straw modified titanium dioxide photocatalyst. The modified titanium dioxide photocatalyst can be used for degrading organic dye sewage, and can effectively degrade methyl violet in particular.

This invention discloses an electroplating solution and method for copper conductive grid lines with arched cross-sections in photovoltaic silicon panels, belonging to the field of photovoltaic electroplating technology. Each liter of the electroplating solution contains: 150-250 g of copper sulfate pentahydrate, 40-70 g of concentrated sulfuric acid, 10-100 mg of soluble chloride, 30-300 mg of polyethylene glycol, 1-20 mg of sodium polydithiopropane sulfonate, 1-30 mg of methylene violet, and the balance being distilled water. A silicon wafer with patterned mask trenches is immersed in the electroplating solution at a current density of 1-5 A / dm³. 2 Electroplating for 5–90 minutes allows copper to be deposited in a raised pattern within the trench. After removing the mask, an arched cross-section of copper conductive grid lines is obtained. This invention utilizes the synergistic effect of chloride ions, polyethylene glycol, sodium polydisulfide dipropane sulfonate, and methylene violet to preferentially promote longitudinal growth of copper within the mask trench, forming smooth, dense, and minimally shadowed arched grid lines under oblique light. Simultaneously, pure copper exhibits low resistivity and significantly lower cost than silver paste, thus comprehensively improving the light utilization efficiency and economic viability of photovoltaic cells.