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Gold Nanoparticle-Loaded Silica Nanospheres for Sensitive and Selective Electrochemical Detection of Bisphenol A

2023; American Chemical Society; Volume: 8; Issue: 42 Linguagem: Inglês

10.1021/acsomega.3c03607

2470-1343

Helttoney Antonio Rodrigues da Silva, Keleen M. Barbosa, Raiedhah A. Alsaiari, Gabriela N. Silva, João Maciel, Alex Sander Rodrigues Cangussu, Sérgio Bitencourt Araújo Barros, Luelc Souza da Costa, José Ribeiro dos Santos Júnior, Carla Verônica Rodarte de Moura, Mabkhoot Alsaiari, Vaeudo Valdimiro de Oliveira, Anna Karla dos Santos Pereira, Lucas Samuel Soares dos Santos, Abdur Rahim,

Chemistry and Chemical Engineering

In this work, silica nanospheres were used as support for gold nanoparticles and applied for bisphenol A electrochemical detection. The development of new silica-supported materials has attracted increasing attention in the scientific world. One approach of interest is using silica nanospheres as support for gold nanoparticles. These materials have a variety of applications in several areas, such as electrochemical sensors. The obtained materials were characterized by solid-state UV-vis spectroscopy, electron microscopy, X-ray diffraction, and electrochemical techniques. The electrode modified with AuSiO2700/CHI/Pt was applied as an electrochemical sensor for BPA, presenting an oxidation potential of 0.842 V and a higher peak current among the tested materials. The AuSiO2700/CHI/Pt electrode showed a logarithmic response for the detection of BPA in the range of 1-1000 nmol L-1, with a calculated detection limit of 7.75 nmol L-1 and a quantification limit of 25.8 nmol L-1. Thus, the electrode AuSiO2700/CHI/Pt was presented as a promising alternative to an electrochemical sensor in the detection of BPA.