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Korean Chemical Engineering Research,
Vol.42, No.1, 78-83, 2004
Vol.42, No.1, 78-83, 2004
화학환원법을 이용한 Ag 나노분말의 합성
Synthesis of Silver Nanoparticles by Chemical Reduction Method
화학환원법을 이용하여 AgNO3 수용액에 환원제를 첨가시키는 방법으로 Ag분말을 제조하였으며, 이 과정 중 환원제의 종류 변화(N2H4, NaBH4)가 얻어진 분말의 특성 변화에 미치는 영향을 살펴보았다. 또한 분말합성 과정 중 계면활성제(Tween20)를 수용액에 첨가하여 계면활성제가 분말의 특성에 미치는 영향도 살펴보았다. 제조된 분말의 SEM 측정결과 환원제로 sodium borohydride(NaBH4)를 사용하여 제조된 Ag 분말의 크기는 약 0.3 μm인 반면 hydrazine(N2H4)을 사용하여 제조된 분말의 크기는 약 1 μm로 sodium borohydride를 사용해 제조한 분말의 크기가 더 작고 고른 크기 분포를 보였다. 또한 환원제로써 hydrazine을 사용시 계면활성제를 첨가하여 제조된 Ag 나노분말의 크기는 50 nm정도로 계면활성제를 첨가하지 않고 제조된 분말보다(1 μm)입자의 크기가 더 작고 균일한 입도 분포를 나타내었다.
Silver powders were prepared by chemical reduction method using reductants in AgNO3 aqueous solutions. The effect of the type of reductants (N2H4, NaBH4) was investigated on the properties of the obtained powders. In addition, the effect of the addition of a surfactant (Tween20) during particle synthesis was studied. The Ag powders prepared using the sodium borohydride as a reductant were found to be 0.3 μm in particle diameter, while those using the hydrazine showed 1 μm in particle diameter. The mean particle size of Ag nanopowders, prepared by the addition of Tween20 as a surfactant, was 50 nm, which is smaller than 1 μm powders formed without the surfactant.
Keywords:
Silver; Hydrazine; Sodium Borohydride; Chemical Reduction; Surfactant; Tween20; Nanoparticle
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- Song JY, Kim BS, Korean Chemical Engineering Research, 48(1), 98, 2010
- Sung IK, Song JY, Kim BS, Korean Chemical Engineering Research, 49(4), 475, 2011
- Song JY, Kwon EY, Kim BS, Korean Journal of Chemical Engineering, 29(12), 1771, 2012
- Roh J, Umh HN, Sim J, Park S, Yi J, Kim Y, Korean Journal of Chemical Engineering, 30(3), 671, 2013
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