Preparation of gold nanoparticles using pyridine-formaldehyde as a reducing agent and its application in high sensitivity colorimetric detection of Pb2+
Literature Information
Liling Lei, Haimei Song, Junhong Zhao, Qingxiang Yang, Zhijun Chen
Recently, functionalized Au nanoparticles (AuNPs) have become fascinating nanomaterials for colorimetric detection of heavy metal ions. In this paper, AuNPs were for the first time prepared by using pyridine-formaldehyde as a reducing agent under alkaline conditions in aqueous solution. In this procedure, pyridine-formaldehyde acts as a reducing agent to reduce HAuCl4 to AuNPs, and is itself oxidized to pyridine carboxylic acid simultaneously and adsorbed on the surface of AuNPs, avoiding the use of any other special stabilizing agent. The prepared AuNPs were used in colorimetric sensor for detection of Pb2+ in aqueous solutions. The Pb2+ induced aggregation could be detected quickly by a colorimetric method with the naked eye and UV-vis absorption spectra with a detection limit of 4 and 1 μM, respectively.
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Analytical Methods welcomes early applications of new analytical and bioanalytical methods and technology demonstrating the potential for societal impact. We require that methods and technology reported in the journal are sufficiently innovative, robust, accurate, and compared to other available methods for the intended application. Developments with interdisciplinary approaches are particularly welcome. Systems should be proven with suitably complex and analytically challenging samples. We encourage developments within, but not limited to, the following technologies and applications: global health, point-of-care and molecular diagnostics biosensors and bioengineering drug development and pharmaceutical analysis applied microfluidics and nanotechnology omics studies, such as proteomics, metabolomics or glycomics environmental, agricultural and food science neuroscience biochemical and clinical analysis forensic analysis industrial process and method development










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