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小木虫论坛-学术科研互动平台 » 化学化工区 » 催化 » 催化剂制备 » 求助用PVP制取AgCl纳米颗粒的原理
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[求助] 求助用PVP制取AgCl纳米颗粒的原理

本人本科生小白，差不多知道这是一个溶胶法制取纳米颗粒的过程，但是原理什么不是很了解，特别是一开始滴入NaCl后，PVP和NaCl是怎么形成溶胶体系的，希望大家能够指导一下，谢谢！下面是制取的过程：
Hybrid Nanoparticles: In a typical synthesis,
ethylene glycol (12 mL, J. T. Baker) in a 20-mL scintillation vial (borosilicate
glass with a polyethylene cap, VWR) was heated at 60 8C for 30 min.
Poly(vinyl pyrrolidone) (PVP, 54 mg,MW55000, Aldrich) and NaCl
(45 mg, Fisher Chemicals) were sequentially added to the ethylene glycol.
After both PVP and NaCl were completely dissolved, ethylene glycol
solution (1 mL) of AgNO3 (57 mg), which was prepared at room
temperature of 22 8C, was injected via a pipette to the above ethylene
glycol solution. Temperature of the solution was continued to maintain at
60 8C for additional 30 min, resulting in the formation of a milky dispersion
containing AgCl nanoparticles. The vial containing milky dispersion was
then transferred to an oil bath set at 160 8C to continue reaction for 35 min
until the dispersion became pale red. The vial was taken out of the oil bath
and cooled down to room temperature in the air. Magnetic stirring was
maintained at 300 rpm and 240 rpm for the reactions at 60 8C and 160 8C,
respectively, throughout the synthesis.
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