還元沈澱法을 利用한 水溶液으로부터 銀 나노 粉末의 製造 硏究
Preparation of Ag Nano-Powder from Aqueous Silver Solution through Reductive Precipitation Method
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
국내 은 함유 폐자원의 고부가가치 제품화를 위한 연구의 일환으로써 sodium formaldehydesulfoxylate와 ascorbic acid를 각각 환원제로 사용한 Ag 나노분말의 제조실험을 수행하였다. Ag 수용액은 질산은을 소정 농도로 증류수에 용해시켜 사용하였으며, Ag 미립자의 응집방지를 위한 분산제로는 Tamol NN8906, PVP, SDS 및 caprylic acid를 각각 사용하였다. 환원반응을 통하여 제조한 Ag 미립자는 입도분석기 및 TEM 측정을 통하여 morphology 와 평균입도를 측정하였다. sodium formaldehydesulfoxylate에 의한 은의 환원을 위해서는 이론치의 1.4배를 첨가해 주어야 하는 것으로 나타났으며, ascorbic acid와는 달리 생성된 Ag 입자가 너무 크게 성장하는 문제점이 있었다. 분산제에 따른 Ag 입자의 특성을 살펴본 결과, Tamol 및 PVP를 사용한 경우에는 bimodal distribution을 보였으나, SDS 와 caprylic acid의 경우에는 수십 nm에서 100 m에 이르는 매우 broad한 입도분포를 보였다.
Abstract
As one of the hydrometallurgical processes available in the recycling of silver-bearing wastes, the preparation of Ag nano-powder was investigated by a reductive precipitation reaction in silver solution using sodium formaldehydesulfoxylate and ascor-bic acid as a reducing agent. Silver solution was prepared by dissolving silver nitrate with distilled water, and Tamol NN8906,PVP, SDS and caprylic acid were also used respectively as the dispersant to avoid the agglomeration of particles during theesize analyzer and TEM to determine the particle size distribution and morphology. It was found that about 40% excess of sodiumformaldehydesulfoxylate was required to reduce completely silver ions in the solution. It also appeared that the particle size gen-erated with sodium formaldehydesulfoxylate was much greater than that with ascorbic acid. As far as the efect of dispersanton the Ag particles was concerned, the particle size distribution showed typically bimodal distribution in case of Tamol/PVPwhile very broad distribution ranged from 0.01 to 100m appeared in case of SDS/caprylic acid.
참고문헌 (13)
- "The potential carcinogenic hazards of electromagnetic radiation", 19(3), pp.244~248 (1995)
- "Synthesis of nanocrystalline copper-tungsten alloys by mechanical alloying", pp.438~441 (2001), A304-306
- "Formation of condensation aerosils at high vapor supersaturation", 27(2), pp.216~228 (1968)
- "Synthesis of semiconducting nanoparticles", pp.165~166 (1996)
- "Synthesis of nanosized silver particles by chemical reduction method", pp.241~246 (2000)
- "Preparation of highly concentrated stable dispersions of uniform silver nanoparticles", pp.75~81 (2003)
- "Nanosized silver powder via reduction of silver nitrate by sodium formaldehydesulfoxylate in acidic pH medium", pp.2242~2245 (2003)
- "Reduction and stabilization of silver nanoparticles in ethanol by nonionic surfactants", pp.3585~3589 (1996)
- "Study of fine silver powder from AgOH slurry by hydrothermal techniques", pp.55~59 (2003), 137
- "Prepara-tion of nanocrystalline silver powders by gamma-ray radiation combined with hydrothermal treatment", pp.314~318 (1993)
- "Hydrothermal preparation and characterization of nanocrystalline silver gallium sulfides", 3(3), pp.275~278 (2001)
- "Electrochemical Deposition of metals in the pre-paration of standard materials for GDMS", pp.208~221 (1997)
- "Ag 수용액으로부터 환원반응에 의한 Ag 미립자의 제조연구", 14(1), pp.26~32 (2005)