Cargando…
Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection
The electrocatalytic characteristics of nanostructures are significantly affected by surface structure. The strict regulation of structural characteristics is highly beneficial for the creation of novel nanocatalysts with enhanced electrocatalytic performance. This work reports a nitrite electrochem...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822311/ https://www.ncbi.nlm.nih.gov/pubmed/36615294 http://dx.doi.org/10.3390/molecules28010099 |
_version_ | 1784865914967031808 |
---|---|
author | Hu, Yaojuan He, Fengyun Chen, Changyun Zhang, Changli Liu, Jingliang |
author_facet | Hu, Yaojuan He, Fengyun Chen, Changyun Zhang, Changli Liu, Jingliang |
author_sort | Hu, Yaojuan |
collection | PubMed |
description | The electrocatalytic characteristics of nanostructures are significantly affected by surface structure. The strict regulation of structural characteristics is highly beneficial for the creation of novel nanocatalysts with enhanced electrocatalytic performance. This work reports a nitrite electrochemical sensor based on novel flower-like Pd-ZnO nanostructures. The Pd-ZnO nanocatalysts were synthesized through a simple hydrothermal method, and their morphology and structure were characterized via field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Their electrocatalytical performance in the nitrite oxidation reaction was studied via cyclic voltammetry (CV) and the amperometric technique. Compared to pure ZnO and Pd nanoparticles, the Pd-ZnO nanostructures exhibited enhanced electrochemical performance in the nitrite oxidation reaction. In order to investigate the relationships between the structures of Pd-ZnO nanocatalysts and the corresponding electrocatalytic performances, different surface morphologies of Pd-ZnO nanocatalysts were fabricated by altering the solution pH. It was found that the flower-like Pd-ZnO nanostructures possessed larger effective surface areas and faster electron transfer rates, resulting in the highest electrocatalytic performance in the nitrite oxidation reaction. The designed nitrite sensor based on flower-like Pd-ZnO displayed a wide concentration linear range of 1 µM–2350 µM, a low detection limit of 0.2 µM (S/N of 3), and high sensitivity of 151.9 µA mM(−1) cm(−2). Furthermore, the proposed sensor exhibited perfect selectivity, excellent reproducibility, and long-time stability, as well as good performance in real sample detection. |
format | Online Article Text |
id | pubmed-9822311 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-98223112023-01-07 Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection Hu, Yaojuan He, Fengyun Chen, Changyun Zhang, Changli Liu, Jingliang Molecules Article The electrocatalytic characteristics of nanostructures are significantly affected by surface structure. The strict regulation of structural characteristics is highly beneficial for the creation of novel nanocatalysts with enhanced electrocatalytic performance. This work reports a nitrite electrochemical sensor based on novel flower-like Pd-ZnO nanostructures. The Pd-ZnO nanocatalysts were synthesized through a simple hydrothermal method, and their morphology and structure were characterized via field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Their electrocatalytical performance in the nitrite oxidation reaction was studied via cyclic voltammetry (CV) and the amperometric technique. Compared to pure ZnO and Pd nanoparticles, the Pd-ZnO nanostructures exhibited enhanced electrochemical performance in the nitrite oxidation reaction. In order to investigate the relationships between the structures of Pd-ZnO nanocatalysts and the corresponding electrocatalytic performances, different surface morphologies of Pd-ZnO nanocatalysts were fabricated by altering the solution pH. It was found that the flower-like Pd-ZnO nanostructures possessed larger effective surface areas and faster electron transfer rates, resulting in the highest electrocatalytic performance in the nitrite oxidation reaction. The designed nitrite sensor based on flower-like Pd-ZnO displayed a wide concentration linear range of 1 µM–2350 µM, a low detection limit of 0.2 µM (S/N of 3), and high sensitivity of 151.9 µA mM(−1) cm(−2). Furthermore, the proposed sensor exhibited perfect selectivity, excellent reproducibility, and long-time stability, as well as good performance in real sample detection. MDPI 2022-12-23 /pmc/articles/PMC9822311/ /pubmed/36615294 http://dx.doi.org/10.3390/molecules28010099 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Hu, Yaojuan He, Fengyun Chen, Changyun Zhang, Changli Liu, Jingliang Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection |
title | Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection |
title_full | Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection |
title_fullStr | Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection |
title_full_unstemmed | Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection |
title_short | Facile Controlled Synthesis of Pd-ZnO Nanostructures for Nitrite Detection |
title_sort | facile controlled synthesis of pd-zno nanostructures for nitrite detection |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822311/ https://www.ncbi.nlm.nih.gov/pubmed/36615294 http://dx.doi.org/10.3390/molecules28010099 |
work_keys_str_mv | AT huyaojuan facilecontrolledsynthesisofpdznonanostructuresfornitritedetection AT hefengyun facilecontrolledsynthesisofpdznonanostructuresfornitritedetection AT chenchangyun facilecontrolledsynthesisofpdznonanostructuresfornitritedetection AT zhangchangli facilecontrolledsynthesisofpdznonanostructuresfornitritedetection AT liujingliang facilecontrolledsynthesisofpdznonanostructuresfornitritedetection |