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Volume 11
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10.3390/chemosensors11020130
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Article

Synthesis and Characterization of a Multiporous SnO2 Nanofibers-Supported Au Nanoparticles-Based Amperometric Sensor for the Nonenzymatic Detection of H2O2

by
Md. Ashraful Kader
1,
Nina Suhaity Azmi
1,*,
A. K. M. Kafi
2,
Md. Sanower Hossain
3,*,
Mohd Faizulnazrie Bin Masri
1,
Aizi Nor Mazila Ramli
1 and
Ching Siang Tan
4,*
1
Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Kuantan 26300, Malaysia
2
Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA
3
Centre for Sustainability of Ecosystem and Earth Resources (Pusat ALAM), Universiti Malaysia Pahang, Gambang, Kuantan 26300, Malaysia
4
School of Pharmacy, KPJ Healthcare University College, Nilai 71800, Malaysia
*
Authors to whom correspondence should be addressed.
Chemosensors 2023, 11(2), 130; https://doi.org/10.3390/chemosensors11020130
Submission received: 17 January 2023 / Revised: 2 February 2023 / Accepted: 5 February 2023 / Published: 10 February 2023
(This article belongs to the Special Issue Advanced Electrochemical Sensors or Biosensors Based on Nanomaterial)
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Abstract

The challenges of a heme protein and enzyme-based H2O2 sensor was subdued by developing a highly sensitive and practically functional amperometric gold nanoparticles (Au NPs)/SnO2 nanofibers (SnO2 NFs) composite sensor. The composite was prepared by mixing multiporous SnO2 NFs (diameter: 120–190 nm) with Au NPs (size: 3–5 nm). The synthesized Au NPs/SnO2 NFs composite was subsequently coated on a glassy carbon electrode (GCE) and displayed a well-defined reduction peak during a cyclic voltammetry (CV) analysis. The SnO2 NFs prevented the aggregation of Au NPs through its multiporous structure and enhanced the catalytic response by 1.6-fold. The SnO2 NFs-supported GCE/Au NPs/SnO2 NFs composite sensor demonstrated a very good catalytic activity during the reduction of hydrogen peroxide (H2O2) that displayed rapid amperometric behavior within 6.5 s. This sensor allowed for highly sensitive and selective detection. The sensitivity was 14.157 µA/mM, the linear detection range was from 49.98 µM to 3937.21 µM (R2 = 0.99577), and the lower limit of detection was 6.67 µM. Furthermore, the developed sensor exhibited acceptable reproducibility, repeatability, and stability over 41 days. In addition, the Au NPs/SnO2 NFs composite sensor was tested for its ability to detect H2O2 in tap water, apple juice, Lactobacillus plantarum, Bacillus subtilis, and Escherichia coli. Therefore, this sensor would be useful due to its accuracy and sensitivity in detecting contaminants (H2O2) in commercial products.
Keywords: gold nanoparticle; SnO2 nanofiber; electrochemical non-enzymatic H2O2 sensor; Au-SnO2 composite; amperometric sensor; bacteria-based real sample gold nanoparticle; SnO2 nanofiber; electrochemical non-enzymatic H2O2 sensor; Au-SnO2 composite; amperometric sensor; bacteria-based real sample
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MDPI and ACS Style

Kader, M.A.; Azmi, N.S.; Kafi, A.K.M.; Hossain, M.S.; Masri, M.F.B.; Ramli, A.N.M.; Tan, C.S. Synthesis and Characterization of a Multiporous SnO2 Nanofibers-Supported Au Nanoparticles-Based Amperometric Sensor for the Nonenzymatic Detection of H2O2. Chemosensors 2023, 11, 130. https://doi.org/10.3390/chemosensors11020130

AMA Style

Kader MA, Azmi NS, Kafi AKM, Hossain MS, Masri MFB, Ramli ANM, Tan CS. Synthesis and Characterization of a Multiporous SnO2 Nanofibers-Supported Au Nanoparticles-Based Amperometric Sensor for the Nonenzymatic Detection of H2O2. Chemosensors. 2023; 11(2):130. https://doi.org/10.3390/chemosensors11020130

Chicago/Turabian Style

Kader, Md. Ashraful, Nina Suhaity Azmi, A. K. M. Kafi, Md. Sanower Hossain, Mohd Faizulnazrie Bin Masri, Aizi Nor Mazila Ramli, and Ching Siang Tan. 2023. "Synthesis and Characterization of a Multiporous SnO2 Nanofibers-Supported Au Nanoparticles-Based Amperometric Sensor for the Nonenzymatic Detection of H2O2" Chemosensors 11, no. 2: 130. https://doi.org/10.3390/chemosensors11020130

APA Style

Kader, M. A., Azmi, N. S., Kafi, A. K. M., Hossain, M. S., Masri, M. F. B., Ramli, A. N. M., & Tan, C. S. (2023). Synthesis and Characterization of a Multiporous SnO2 Nanofibers-Supported Au Nanoparticles-Based Amperometric Sensor for the Nonenzymatic Detection of H2O2. Chemosensors, 11(2), 130. https://doi.org/10.3390/chemosensors11020130

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