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Citation: YANG Shi-Guo, CHEN Qing-De, SHI Jian-Feng, SHEN Xing-Hai. Controllable Radiolytic Reduction of Cu²⁺ in Aqueous Solution by β-Cyclodextrin[J]. Acta Physico-Chimica Sinica, ;2010, 26(04): 805-810. doi: 10.3866/PKU.WHXB20100407 shu

Controllable Radiolytic Reduction of Cu²⁺ in Aqueous Solution by β-Cyclodextrin

1.
Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Received Date: 13 October 2009
Available Online: 5 February 2010

We used β-cyclodextrin (β-CD) to control the radiolytic reduction of Cu2+ in aqueous solution at a safe absorbed dose. With an increase in the concentration of β-CD, the reduction product of Cu(NO3)2 gradually changed from cuprous oxide to copper. At a β-CD concentration of 8.0 mmol·L-1, the main reduction product was composed of pure copper nanoparticles. Meanwhile, no cuprous oxide was generated during the course of irradiation. This is attributed to the regularity that β-CD is able to scavenge·OH, which suppresses the reaction between hydrated electrons (e-aq) and·OH, and increases the yield of e-aq. This favors the generation of copper. The adsorption of β-CDs on the surface of copper nanoparticles via hydroxyl groups promotes the stability of copper nanoparticles in the aqueous solution. The reduction products were characterized by UV-Vis absorption spectroscopy, powder X-ray diffraction (XRD), and selected area electron diffraction (SAED).
- Radiolytic reduction,
- Nanoparticle,
- Cyclodextrin,
- Copper,
- Cuprous oxide
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Controllable Radiolytic Reduction of Cu2+ in Aqueous Solution by β-Cyclodextrin

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通讯作者: 陈斌, bchen63@163.com

Controllable Radiolytic Reduction of Cu²⁺ in Aqueous Solution by β-Cyclodextrin