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	β-环糊精调控水溶液中Cu~(2+)的辐射还原; Controllable Radiolytic Reduction of Cu2+ in Aqueous Solution by beta-Cyclodextrin
	杨士国 ; 陈庆德 ; 施建峰 ; 沈兴海
	2010
关键词	辐射还原 纳米粒子 环糊精 铜 氧化亚铜 Radiolytic reduction Nanoparticle Cyclodextrin Copper Cuprous oxide
英文摘要	在β-环糊精(β-CD)水溶液的安全吸收剂量范围内,利用β-CD来调控Cu2+的辐射还原.随着β-CD的加入,硝酸铜的辐射还原产物从Cu2O逐渐转变为Cu.当β-CD浓度增大至8.0mmol·L-1时,辐射还原产物主要为Cu纳米粒子.在辐照过程中,Cu2+的还原没有经历Cu2O的中间过程.这是由于β-CD对·OH的清除减少了·OH与水化电子(ea-q)的反应,增大了ea-q的产额,从而有利于Cu的生成.另外,β-CD通过羟基在Cu纳米粒子表面的吸附可增强Cu纳米粒子在水溶液中的稳定性.用紫外-可见(UV-Vis)吸收光谱、粉末X射线衍射(XRD)和选区电子衍射(SAED)对Cu2+辐射还原产物...; We used beta-cyclodextnn (beta-CD) to control the radiolytic reduction of Cu2+ in aqueous solution at a safe absorbed dose With an increase in the concentration of beta-CD. the reduction product of Cu(NO3)(2) gradually changed from cuprous oxide to copper. At a beta-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 beta-CD is able to scavenge center dot OH, which suppresses the reaction between hydrated electrons (e(aq)(-)) and center dot OH. and increases the yield of e(aq)(-). This favors the generation of copper The adsorption of beta-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); http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000276958400003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 4; 04; 805-810; 26
语种	中文
出处	万方 ; 知网 ; SCI
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/80260]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	杨士国,陈庆德,施建峰,等. β-环糊精调控水溶液中Cu~(2+)的辐射还原, Controllable Radiolytic Reduction of Cu2+ in Aqueous Solution by beta-Cyclodextrin. 2010-01-01.

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