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	Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions
	Shougang Chen，吴爱国 ; Junwei Xin,ab Lijing Miao,a Shougang Chen*b and Aiguo Wu*a
刊名	Analytical Methods
	2012-02-25
卷号	37期号:4页码:1259—1264
通讯作者	Shougang Chen，吴爱国
合作状况	李雨桐
中文摘要	A sensitive and selective colorimetric assay method for the detection of Cr3+ has been developed using tripolyphosphate functionalized gold nanoparticles (P3O10 5 –AuNPs). Infrared (IR) spectra and energy dispersive X-ray spectroscopy (EDS) confirmed that tripolyphosphates capped on the surfaces of gold nanoparticles (AuNPs). Gold nanoparticles were prepared by reducing HAuCl4 with sodium borohydride (NaBH4) in the presence of sodium tripolyphosphate (Na5P3O10). Upon exposure to Cr3+, the color of the gold nanoparticle solution changed from red to violet, which was in response to the surface plasmon absorption of dispersed and aggregated nanoparticles. The P3O10 5 –AuNPs were bound by Cr3+ and showed excellent selectivity compared to other ions (Hg2+, Fe3+, Cr6+, Mn2+, Cd2+, Ni2+, Pb2+, Ba2+, Co2+, Cu2+, Ca2+,Mg2+, Zn2+, Al3+, Na+, Cl , SO4 2 , PO4 3 , CO3 2 , NO3 , and all of the above interfering ions with the exception of Cr3+) and had a detection limit of 10 7M by the naked eye in this way. Most importantly, the P3O10 5 –AuNPs can be stored at room temperature over half a year. In addition, the P3O10 5 –AuNPs were also used to detect Cr3+ in real environmental water samples, with low interference.
学科主题	材料科学
原文出处	其他国内刊物
公开日期	2013-12-16
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/9561]
专题	宁波材料技术与工程研究所_宁波所知识产出
推荐引用方式 GB/T 7714	Shougang Chen，吴爱国,Junwei Xin,ab Lijing Miao,a Shougang Chen*b and Aiguo Wu*a. Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions[J]. Analytical Methods,2012,37(4):1259—1264.
APA	Shougang Chen，吴爱国,&Junwei Xin,ab Lijing Miao,a Shougang Chen*b and Aiguo Wu*a.(2012).Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions.Analytical Methods,37(4),1259—1264.
MLA	Shougang Chen，吴爱国,et al."Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions".Analytical Methods 37.4(2012):1259—1264.

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