Next Article in Journal
Fabrication of an All-Solid-State Ammonium Paper Electrode Using a Graphite-Polyvinyl Butyral Transducer Layer
Previous Article in Journal
Applications of the Photoionization Detector (PID) in Occupational Hygiene. Estimation of Air Changes per Hour in Premises with Natural Ventilation
Previous Article in Special Issue
Leftover Kiwi Fruit Peel-Derived Carbon Dots as a Highly Selective Fluorescent Sensor for Detection of Ferric Ion
Article

Tannic Acid-Capped Gold Nanoparticles as a Novel Nanozyme for Colorimetric Determination of Pb2+ Ions

A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Gajanan Ghodake
Chemosensors 2021, 9(12), 332; https://doi.org/10.3390/chemosensors9120332 (registering DOI)
Received: 20 October 2021 / Revised: 19 November 2021 / Accepted: 22 November 2021 / Published: 25 November 2021
In this study, tannic acid-modified gold nanoparticles were found to have superior nanozyme activity and catalyze the oxidation reaction of 3,3′,5,5′-tetramethylbenzidine in the presence of hydrogen peroxide. Enhancing the catalytic activity of the nanozyme by Pb2+ ions caused by selectively binding metal ions by the tannic acid-capped surface of gold nanoparticles makes them an ideal colorimetric probe for Pb2+. The parameters of the reaction, including pH, incubation time, and concentration of components, were optimized to reach maximal sensitivity of Pb2+ detection. The absorption change is directly proportional to the Pb2+ concentration and allows the determination of Pb2+ ions within 10 min. The colorimetric sensor is characterized by a wide linear range from 25 to 500 ng×mL−1 with a low limit of detection of 11.3 ng×mL−1. The highly sensitive and selective Pb2+ detection in tap, drinking, and spring water revealed the feasibility and applicability of the developed colorimetric sensor. View Full-Text
Keywords: colorimetric sensor; gold nanoparticles; tannic acid; nanozyme; catalytic activity; heavy metal detection; lead; water pollution colorimetric sensor; gold nanoparticles; tannic acid; nanozyme; catalytic activity; heavy metal detection; lead; water pollution
Show Figures

Graphical abstract

MDPI and ACS Style

Serebrennikova, K.V.; Komova, N.S.; Berlina, A.N.; Zherdev, A.V.; Dzantiev, B.B. Tannic Acid-Capped Gold Nanoparticles as a Novel Nanozyme for Colorimetric Determination of Pb2+ Ions. Chemosensors 2021, 9, 332. https://doi.org/10.3390/chemosensors9120332

AMA Style

Serebrennikova KV, Komova NS, Berlina AN, Zherdev AV, Dzantiev BB. Tannic Acid-Capped Gold Nanoparticles as a Novel Nanozyme for Colorimetric Determination of Pb2+ Ions. Chemosensors. 2021; 9(12):332. https://doi.org/10.3390/chemosensors9120332

Chicago/Turabian Style

Serebrennikova, Kseniya V., Nadezhda S. Komova, Anna N. Berlina, Anatoly V. Zherdev, and Boris B. Dzantiev 2021. "Tannic Acid-Capped Gold Nanoparticles as a Novel Nanozyme for Colorimetric Determination of Pb2+ Ions" Chemosensors 9, no. 12: 332. https://doi.org/10.3390/chemosensors9120332

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop