New pathway to prepare gold nanoparticles and their applications in catalysis and surface-enhanced Raman scattering

Chun Chao Chang, Kuang Hsuan Yang, Yu Chuan Liu, Ting Chu Hsu

研究成果: 雜誌貢獻文章同行評審

7 引文 斯高帕斯(Scopus)

摘要

As shown in the literature, additional energies are necessary for the reduction of positively charged noble metal ions to prepare metal nanoparticles (NPs). In this work, we report a new green pathway to prepare Au NPs in neutral 0.1. M NaCl aqueous solutions from bulk Au substrates without addition of any stabilizer and reductant just via aid of natural chitosan (Ch) at room temperature. Au- and Ch-containing complexes in aqueous solution were electrochemically prepared. The role of Ch is just an intermediate to perform electron transfer with Au NPs. The stability of these prepared Au NPs is well maintained by Au NPs themselves with slightly positively charged Au remained on the surface of Au NPs. The particle size of prepared spherical Au (1. 1. 1) NPs is ca. 15. nm in diameter. Moreover, increasing the pH of preparation solutions can be contributive to preparing concentrated Au NPs in solutions. The prepared Au NPs are surface-enhanced Raman scattering (SERS)-active for probe molecules of Rhodamine 6G. They also demonstrate significantly catalytic activity for decomposition of acetaldehyde in rice wine.

原文英語
頁(從 - 到)169-173
頁數5
期刊Colloids and Surfaces B: Biointerfaces
93
DOIs
出版狀態已發佈 - 五月 1 2012

ASJC Scopus subject areas

  • 生物技術
  • 膠體和表面化學
  • 物理與理論化學
  • 表面和介面

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