稳定剂和 pH 值对 SnO2 纳米颗粒粒径的影响。
Influence of stabilising agents and pH on the size of SnO2 nanoparticles.
机构信息
Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, Janiszewskiego 11/17, 50-372 Wroclaw, Poland.
出版信息
Beilstein J Nanotechnol. 2014 Nov 20;5:2192-201. doi: 10.3762/bjnano.5.228. eCollection 2014.
According to recent research, the use of nanoparticles as a gas-sensitive material increases the selectivity and sensitivity and shortens the response time of a sensor. However, the synthesis of SnO2 nanoparticles presents many difficulties. The following article presents a simple and inexpensive method for the synthesis of SnO2 nanoparticles. The influence of the surfactant and polymer choice on the size of the resulting nanoparticles was investigated and a mechanism describing their interaction was proposed. It was found that stable colloids of SnO2 nanoparticles are formed in the presence of both PEI and Triton X-100 surfactants as stabilising agents. However, an additional factor essential for good stabilisation of the nanoparticles was an appropriate acidity level of the solution. Under optimal conditions, nanoparticles having an average diameter of about 10 nm are reproducibly formed.
根据最近的研究，将纳米粒子用作气体敏感材料可以提高传感器的选择性、灵敏度并缩短响应时间。然而，SnO2 纳米粒子的合成存在许多困难。本文提出了一种简单且廉价的 SnO2 纳米粒子合成方法。研究了表面活性剂和聚合物选择对所得纳米粒子尺寸的影响，并提出了描述它们相互作用的机制。结果发现，当使用 PEI 和 Triton X-100 表面活性剂作为稳定剂时，SnO2 纳米粒子的胶体是稳定的。然而，对于纳米粒子的良好稳定，还有一个额外的重要因素是溶液的适当酸度水平。在最佳条件下，可重复性地形成平均直径约为 10nm 的纳米粒子。
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