The reducing property of potassium-filled single-walled carbon nanotubes (SWCNTs) was used to synthesize single-walled carbon nanotube/metal nanoparticle hybrid materials. Electron transfer from potassium to SWCNTs gives rise to a substantial enhancement of the reducing ability of the carbon nanotubes. Metal ions with redox potentials lower than that of pristine SWCNTs can be reduced by potassium-filled SWCNTs. SWCNTs decorated with copper and zinc nanoparticles were synthesized through redox reactions between potassium-filled SWCNTs and metal ions. These redox reactions cannot take place if the potassium-filled SWCNTs have been exposed to air, because of oxidation of the carbon nanotubes which is shown by a shift of the G band frequency in Raman spectra.
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机译:利用钾填充单壁碳纳米管(SWCNTs)的还原性能合成了单壁碳纳米管/金属纳米颗粒杂化材料。从钾到SWCNTs的电子转移大大增强了碳纳米管的还原能力。氧化还原电位低于原始单壁碳纳米管的金属离子可以通过充钾单壁碳纳米管还原。如果充满钾的 SWCNT 暴露在空气中,则不会发生这些氧化还原反应,因为碳纳米管的氧化表现为拉曼光谱中 G 波段频率的偏移。
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Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China;