纳米银催化共振瑞利散射光谱检测痕量肼  

An Analytical Platform of Nanosilver SPR Rayleigh Scattering and Its Application to Detect N_2H_4

作　　者：汤雪萍[1,2,3] 王耀辉[1,2,3] 刘庆业[1,2,3] 温桂清[1,2,3] 张杏辉[1,2,3] 罗杨合[1,2,3] 梁爱惠[1,2,3] 蒋治良[1,2,3] 

机构地区：[1]广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室,广西桂林541004 [2]广西师范大学广西污染控制理论与技术重点实验室,广西桂林541004 [3]广西师范大学环境与资源学院,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2015年第2期88-95,共8页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(21477025;21465006;21267004;21367005;21365011;21467001;21447006;21307017);广西自然科学基金资助项目(2013GXNSFFA019003;2014GXNSFAA118050;2014GXNSFAA118059)

摘　　要：在pH6．2的Na2HPO4-柠檬酸缓冲溶液、水浴60℃条件下，纳米银粒子催化水合肼（N2H4）还原氯金酸（HAuCl4），Au3＋被还原成单质金并吸附在金纳米表面，在370nm处有一个较强的共振瑞利散射（RRS）峰。随着N2H4浓度的增大，生成的单质金越多，金纳米的粒径也逐渐增大，使得体系370nm处的共振瑞利散射峰线性强度增大，从而构建纳米银催化RRS分析平台并用于检测N2H4在选定条件下，N2H4的浓度在0．0125～3．5μmol／L范围内与共振散射峰强度增加值△I呈现良好线性关系，线性方程为△IRS=1297．8C十228．78，检出限为0．006μmol／LN2H4，该法测定了水样中的N2H4，结果令人满意。In pH 6.2 Na2HPO4-citric acid buffer solution, water bath 60 ℃, AC＋ from HAuC14 was reduced to Au nanoflowers （AuNF） by hydrazine hydrate （N2H4）that catalyzed by silver nanoparticles （AgNPs）and growing around the AgNPs surface. Thus, the special AuNFs exhibited a strong resonance Rayleigh scattering （RRS）peak at 370 nm. With increase of N2H4 concentration, AuNFs gradually increased and formed the larger size AuNFs, and the RRS intensity was linearly increased. So, a simple and sensitive nanosilver catalytic reaction RRS analysis platform was fabricated which can be utilized to detect trace N2H4. Under the selected conditions, a linear relation between the increased RRS intensity （AI370nm）and N2H4 concentration was found in the range of 0.012 5=-3.5 μmol/L, with a regression equation of AIRS = 1 297.8C ＋228.78, and detection limit of 0.006/μmol/L. The method was used for the detection of N2H4 in water sample with satisfactory results.

关 键 词：纳米金 氯金酸 共振瑞利散射 N2H4 

分 类 号：O657.3[理学—分析化学]