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Synthesis of Shape Controlled Pd Nanoparticles and Surface-Induced Photoreduction of 4-Nitrobenzenethiol on Pd

모양이 조절된 팔라듐 나노입자의 합성과 4-나이트로벤젠 사이올의 광환원 반응

  • Lee, Young Wook (Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Shin, Tae Ho (Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology)
  • 이영욱 (한국세라믹기술원 에너지환경본부) ;
  • 신태호 (한국세라믹기술원 에너지환경본부)
  • Received : 2019.08.02
  • Accepted : 2019.08.09
  • Published : 2019.11.01

Abstract

The facile synthesis of shape-controlled Pd nanoparticles (PdNPs) with ascorbic acid as a reducing agent and cetyltrimethylammonium bromide (CTAB) as a capping agent is presented in this study. The synthesized PdNPs were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman Spectroscopy. The prepared PdNPs show efficient surface-enhanced Raman scattering (SERS) properties. SERS studies on the adsorption characteristics of 1,4-phenylene diisocyanide (1,4-PDI) on colloidal PdNPs have revealed that the relative peak intensity of the $(NC)_{free}$ and $(NC)_{bound}$ modes distinctly depends on the 1,4-PDI concentration as well as the shape of the PdNPs. Furthermore, we found that the PdNPs are also efficient photoelectron emitters such that the SERS spectrum of 4-nitrobenzenethiol (4-NBT) on PdNPs is readily converted to that of 4-aminobenzenethiol (4-ABT) under 632.8 nm radiation.

Acknowledgement

Supported by : Ministry or Trade, Industry & Energy(MI), Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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