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Recent Advances in Photo(electro)chemical Sensing and Sensors
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Recent Advances in Photo(electro)chemical Sensing and Sensors

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Environmental Sensing".

Deadline for manuscript submissions: 30 April 2025 | Viewed by 3652

Special Issue Editor

Dr. Sridharan Balu

E-Mail Website
Guest Editor
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan
Interests: photo(electro)catalysis; water-splitting; DSSC; electrochemical sensors; materials science; semiconductor materials; CO2 hydrogenation; in-situ DRIFT reactions

Special Issue Information

Dear Colleagues,

In recent years, the electrochemical sensing platform has emerged as a promising alternative and real-time method for environmental monitoring. Its ability to detect various analytes, including pharmaceuticals, biomolecules, environmentally hazardous heavy metals, pesticides, and contaminants, has received much attention owing to its extended detection limit, high selectivity, excellent accuracy, stability, ease of fabrication and cost-effectiveness. The sensing performances and signal transduction depend on the catalyst/material surface and type of analytes. In this regard, different catalyst design strategies, including heterojunction formation, metal/non-metal doping, surface functionalization and defect engineering, are of interest to boost optoelectronic properties such as light absorption, charge migration, electron transferability, selectivity and surface-redox properties.

This Special Issue aims to showcase research works based on the recent advances and developments in photoelectrochemical and electrochemical sensing and sensors using a wide range of novel single and nanocomposite catalytic materials. We welcome the submission of original research, reviews and short communication articles on this topic.

Dr. Sridharan Balu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electrochemical sensors
  • photoelectrochemical sensors
  • nanomaterials
  • metal-oxides
  • carbon-based materials
  • semiconductors
  • hybrid materials
  • environmental/water/health monitoring
  • hazardous chemicals
  • pharmaceuticals
  • environmental contaminants

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Published Papers (3 papers)

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Research

15 pages, 5107 KiB  
Article
Feasibility Study of Photoelectrochemical Sensing of Glucose and Urea Using BiVO4 and BiVO4/BiOCl Photoanodes
by Monika Skruodiene, Jelena Kovger-Jarosevic, Irena Savickaja, Jurga Juodkazyte and Milda Petruleviciene
Sensors 2025, 25(4), 1260; https://doi.org/10.3390/s25041260 - 19 Feb 2025
Viewed by 424
Abstract
This study investigates the photoelectrochemical (PEC) performance of molybdenum-doped bismuth vanadate (Mo-doped BiVO4) and its heterojunction with the BiOCl layer in glucose and urea sensing. Photoelectrochemical analyses, including cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), revealed that the formation of [...] Read more.
This study investigates the photoelectrochemical (PEC) performance of molybdenum-doped bismuth vanadate (Mo-doped BiVO4) and its heterojunction with the BiOCl layer in glucose and urea sensing. Photoelectrochemical analyses, including cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), revealed that the formation of a heterojunction enhanced charge carrier separation. The impact of the interaction between the surface of the photoanode and analytes on sensing performance was systematically evaluated. Among the tested configurations, Mo-doped BiVO4 exhibited superior glucose sensing with a limit of detection (LOD) of 0.173 µM, while BiVO4/BiOCl demonstrated an LOD of 2.474 µM. In the context of urea sensing, Mo-doped BiVO4 demonstrated an LOD of 0.656 µM, while BiVO4/BiOCl exhibited an LOD of 0.918 µM. Notably, despite the enhanced PEC activity observed in heterostructured samples, Mo-doped BiVO4 exhibited superior sensing performance, attributable to good interaction with analytes. The photocurrent response trends—an increase with glucose concentration and a decrease with urea concentration—were attributed to oxidation and adsorption phenomena on the photoanode surface. These findings underscore the critical role of photoanode surface engineering in advancing PEC sensor technology, paving the way for more efficient environmental and biomedical applications. Full article
(This article belongs to the Special Issue Recent Advances in Photo(electro)chemical Sensing and Sensors)
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13 pages, 3504 KiB  
Article
The Effect of the Position of a Phenyl Group on the Luminescent and TNP-Sensing Properties of Cationic Iridium(III) Complexes
by Xiaoran Yang, Jiahao Du, Rui Cai and Chun Liu
Sensors 2025, 25(3), 839; https://doi.org/10.3390/s25030839 - 30 Jan 2025
Viewed by 624
Abstract
Three cationic Ir(III) complexes, 1, 2, and 3, were successfully synthesized and characterized by tuning the position of a phenyl group at the pyridyl moiety in 2-phenylpyridine. All three complexes exhibited typical aggregation-induced phosphorescence emission (AIPE) properties in CH3 [...] Read more.
Three cationic Ir(III) complexes, 1, 2, and 3, were successfully synthesized and characterized by tuning the position of a phenyl group at the pyridyl moiety in 2-phenylpyridine. All three complexes exhibited typical aggregation-induced phosphorescence emission (AIPE) properties in CH3CN/H2O. The AIPE property was further utilized to achieve the highly sensitive detection of 2,4,6-trinitrophenol (TNP) in aqueous media with low limit of detection (LOD) values of 164, 176, and 331 nM, respectively. This suggests that the different positions of the phenyl group influence the effectiveness of 1, 2, and 3 in the detection of TNP. In addition, 1, 2, and 3 showed superior selectivity and anti-interference properties for the detection of TNP and were observed to have the potential to be used to detect TNP in practical applications. The changes in the luminescence lifetime and UV-Vis absorption spectra of 1, 2, and 3 before and after the addition of TNP indicate that the corresponding quenching process is a combination of static and dynamic quenching. Additionally, the proton nuclear magnetic resonance spectra and results of spectral studies show that the detection mechanism is photo-induced electron transfer (PET). Full article
(This article belongs to the Special Issue Recent Advances in Photo(electro)chemical Sensing and Sensors)
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16 pages, 5122 KiB  
Article
Sensitive Electrochemical Detection of Ammonia Nitrogen via a Platinum–Zinc Alloy Nanoflower-Modified Carbon Cloth Electrode
by Guanda Wang, Guangfeng Zhou, Qingze Zhang, Dong He, Chun Zhao and Hui Suo
Sensors 2024, 24(3), 915; https://doi.org/10.3390/s24030915 - 31 Jan 2024
Cited by 5 | Viewed by 1909
Abstract
As a common water pollutant, ammonia nitrogen poses a serious risk to human health and the ecological environment. Therefore, it is important to develop a simple and efficient sensing scheme to achieve accurate detection of ammonia nitrogen. Here, we report a simple fabrication [...] Read more.
As a common water pollutant, ammonia nitrogen poses a serious risk to human health and the ecological environment. Therefore, it is important to develop a simple and efficient sensing scheme to achieve accurate detection of ammonia nitrogen. Here, we report a simple fabrication electrode for the electrochemical synthesis of platinum–zinc alloy nanoflowers (PtZn NFs) on the surface of carbon cloth. The obtained PtZn NFs/CC electrode was applied to the electrochemical detection of ammonia nitrogen by differential pulse voltammetry (DPV). The enhanced electrocatalytic activity of PtZn NFs and the larger electrochemical active area of the self-supported PtZn NFs/CC electrode are conducive to improving the ammonia nitrogen detection performance of the sensitive electrode. Under optimized conditions, the PtZn NFs/CC electrode exhibits excellent electrochemical performance with a wide linear range from 1 to 1000 µM, a sensitivity of 21.5 μA μM−1 (from 1 μM to 100 μM) and a lower detection limit of 27.81 nM, respectively. PtZn NFs/CC electrodes show excellent stability and anti-interference. In addition, the fabricated electrochemical sensor can be used to detect ammonia nitrogen in tap water and lake water samples. Full article
(This article belongs to the Special Issue Recent Advances in Photo(electro)chemical Sensing and Sensors)
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