Method for reduction preparation of silver nanowire by composite solvent

[0018] In a polytetrafluoroethylene reaction kettle, weigh 2.8g of template dispersant polyvinylpyrrolidone, add 100ml of glycerol, 10ml of water composite solvent, heat the temperature of the reaction kettle to 120°C, and reflux for 20 minutes; use nitric acid with a purity of 99.5% Silver is added into the mixed solution of glycerol and deionized water with a volume ratio of 1:2 and heated slightly to obtain a 1M silver nitrate solution; 60ml of this solution is used to spray the composite solvent in batches, and the speed of spraying can be 3g / m 2 .s~10g / m 2 Between .s, react at 120°C for 4 hours, separate, wash once with acetone or deionized water, and dry in vacuum. The obtained powder is subjected to physical and chemical testing to obtain 6.25 g of silver nanowires. exist figure 1 It can be seen in the silver nanowires composed of a large number of filaments with a length of tens of microns.

[0020] According to the method and dosage of Example 1, the amount of PVP was added to 11.2 g, the temperature of the reactor reached 160° C., and the reaction was carried out for 4 hours to obtain nano-silver nanowires, and the product was 6.32 g.

[0022] According to the method of Example 1, 100ml glycerol, 100ml water, PVP2.8g, spray 40ml1MAgNO 3 solution, the reaction kettle temperature is 90°C, and react for 4 hours to obtain a dark yellow silver sol with uniform silver nanowires, and the maximum visible ultraviolet absorption peak is around 420nm.