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Citation: HAN Tao, YANG Jia, TANG Ying, ZHANG Jin, TU Mingjing. Resonance Light Scattering Spectra of Copper Colloids in Ethylene Glycol[J]. Chinese Journal of Applied Chemistry, ;2011, 28(10): 1213-1217. doi: 10.3724/SP.J.1095.2011.00624 shu

Resonance Light Scattering Spectra of Copper Colloids in Ethylene Glycol

HAN Tao ^a,b,, ,
YANG Jia ^b ,
TANG Ying ^b ,
ZHANG Jin ^a ,
TU Mingjing ^c

1.
a Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology, Chongqing 402160;
2.
b College of Chemistry and Environmental Technology, Chongqing University of Arts and Sciences, Chongqing 402160;
3.
c College of Material Science and Engineering, Sichuan University, Chengdu

Corresponding author: HAN Tao,
Received Date: 19 October 2010
Available Online: 2 March 2011
Fund Project: 重庆市教委科技基金资助项目(KJ101215) (KJ101215)重庆市科技攻关项目(CSTC,2010AC7136) (CSTC,2010AC7136)重庆高校创新团队(201042) (201042)

Copper colloids were synthesized in ethylene glycol by using ascorbic acid(VC) as the reducing agent and polyvinyl pyrrolidone(PVP) as the dispersant.The as-prepared copper colloids were characterized by XRD,UV-Vis and resonance light scattering(RLS).Face-centered cubic Cu(0) particles were formed,which displayed resonance light scattering(RLS) spectra with a typical plasma resonance absorption within the range of 592~602 nm and the maximum scattering wavelength at 468 nm.The RLS results show that the favorable reaction conditions are in the addition order of VC,CuSO₄ and PVP under n(VC)/n(Cu²⁺)=15,n(PVP-K30)/n(Cu²⁺)=1.4,temperature=60℃,and incubating for 1 h.The obtained copper colloids are stable for 24 h.Under such reaction conditions,the scattering intensity(ΔI_RLS) is proportional to Cu²⁺ content in the range of 5.12~12.8 mg/L with the detection limit of 0.63 μg/L(3σ),and the regression equation is ΔI=7420.2ρ-631.8(r=0.9962).When the concentration of Cu²⁺ solution is 10 mg/L,the colloidal system is stable for 24 h.Foreign substances such as 0.64 mg/L MnSO₄,CdSO₄ and ZnSO₄,1.28 mg/L of KI,64 mg/L of Na₂CO₃ and Ca(OH)₂,960 mg/L CH₃CH₂OH,640 mg/L CH₃OH and 320 mg/L CH₃CH₂CH₂OH had no interference.Therefore,a simple method to detect the Cu²⁺ in ethylene glycol is established using the RLS spectra.
- copper colloids,
- resonance light scattering,
- ascorbic acid
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