An electrochemical preparation of bismuth nanoparticles by reduction of bismuth oxide nanoparticles and their application as an environmental sensor

作者：Hwang Gil Ho; Han Won Kyu; Kim So Jin; Hong Seok Jun; Park Joon Shik; Park Hyun Joon; Kang Sung Goon^*

来源：Journal of Ceramic Processing Research, 2009, 10(2): 190-194.

• Bismuth oxide nanoparticles
• Bismuth nanoparticles
• Electrochemical reduction
• Electrochemical sensor

Bismuth nanoparticles were prepared by electrochemical reduction of bismuth oxide nanoparticles. Bismuth nitrate (Bi(NO(3))(3)center dot 5H(2)O) and ammonium hydroxide (NH(4)OH) were used as starting materials and precipitant to synthesize bismuth hydroxide. After decomposition of bismuth hydroxide at 800 degrees C, spherical bismuth oxide nanoparticles with a diameter of 200 nm were obtained. Bismuth oxide nanoparticles were electrochemically reduced to bismuth nanoparticles below -1.0 V (vs. SCE) in a 0.1 M KOH solution. The morphology and structure of the nanoparticles were analyzed with a scanning electron microscope(SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The bismuth nanoparticles prepared were applied for the simultaneous determination of lead and cadmium by square wave anodic stripping voltammetry. Screen-printed bismuth nanoparticle electrodes presented well-defined, reproducible and sharp stripping signals.

• 出版日期2009-4