A novel portable electrochemical sensor for Hg detection was developed, featuring integration with a smartphone-based potentiostat and utilizing a β-cyclodextrin-coated porous graphene ink-modified screen-printed electrode (β-CD/P-Gi/SPE). The use of β-cyclodextrin enhances molecular recognition and selectivity for Hg, while porous graphene ink improves conductivity and sensitivity, addressing limitations of existing electrode materials. Comprehensive characterization using SEM, EDX, FT-IR, and Raman spectroscopy confirmed the successful incorporation of the β-CD polymer film onto the P-Gi. The electrochemical properties of the modified electrode were evaluated using electrochemical impedance spectroscopy and cyclic voltammetry. The adsorptive anodic stripping voltammetry (AdASV) condition was also optimized. Under optimal conditions, AdASV demonstrated that the oxidation peak current was linearly proportional to the Hg concentration in the range of 0.50-80 μg mL with a detection limit of 0.11 μg mL. Furthermore, the sensor exhibited excellent reproducibility, sustained long-term stability, and a fast current response. To demonstrate the practical applicability of the proposed sensor, the proposed sensor successfully determined Hg in skin whitening creams.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.talanta.2025.127776 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
3D-Printed Flexible and Integrable Asymmetric Microsupercapacitors with High-Areal-Energy-Density.
ACS Appl Mater Interfaces
March 2025
College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China.
3D-Printed quasi-solid-state microsupercapacitors (MSCs) present immense potential as next-generation miniature energy storage devices, offering superior power density, excellent flexibility, and feasible on-chip integration. However, the challenges posed by formulating 3D printing inks with high-performance and ensuring efficient ionic transport in thick electrodes hinder the development of advanced MSCs with high areal energy density. Herein, we report 3D-printed ultrahigh-energy-density asymmetric MSCs with latticed electrodes, fabricated using Ni-Co-S/Co(OH)/carbon nanotubes/reduced graphene oxide (Ni-Co-S/Co(OH)/CNTs/rGO) positive electrode ink and activated carbon (AC)/CNTs negative electrode ink.
View Article and Find Full Text PDFA β-cyclodextrin/porous graphene ink electrode for smartphone-assisted electrochemical Hg sensing.
Talanta
February 2025
Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Forensic Science Innovation and Service Center, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand. Electronic address:
A novel portable electrochemical sensor for Hg detection was developed, featuring integration with a smartphone-based potentiostat and utilizing a β-cyclodextrin-coated porous graphene ink-modified screen-printed electrode (β-CD/P-Gi/SPE). The use of β-cyclodextrin enhances molecular recognition and selectivity for Hg, while porous graphene ink improves conductivity and sensitivity, addressing limitations of existing electrode materials. Comprehensive characterization using SEM, EDX, FT-IR, and Raman spectroscopy confirmed the successful incorporation of the β-CD polymer film onto the P-Gi.
View Article and Find Full Text PDFRecent Advances in Scalable, High-Mass Loaded Electrodes for Grid-Scale Energy Storage.
Adv Mater
March 2025
Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA.
The increasing electrification of daily life as well as the intermittent characteristic of renewable energy sources require viable solutions for grid-scale energy storage. Critical considerations for grid storage applications are electrode mass loading and electrode thickness as these features govern battery pack energy density, an important factor in determining manufacturing costs. For this reason, there is increased interest in finding new ways of creating electrodes with high mass loading.
View Article and Find Full Text PDFInkjet Printing of Heterostructures: Investigation and Strategies for Control of Interfaces.
ACS Appl Mater Interfaces
March 2025
Centre for Additive Manufacturing, Faculty of Engineering, University of Nottingham, Jubilee Campus, Nottingham NG8 1BB, U.K.
Development of printed electronics requires understanding and control of the interfaces in heterostructure devices. However, investigation of the interfaces between dissimilar materials to achieve control of intermixing presents challenges. Here, we report investigation of interfaces in inkjet printed heterostructures by time-of-flight secondary ion mass spectrometry (ToF-SIMS), focused ion beam scanning electron microscopy (FIB-SEM), and energy dispersive X-ray (EDX) analysis to provide complementary insights into the intermixing phenomena.
View Article and Find Full Text PDFLiquid Printing in Nanochitin Suspensions: Interfacial Nanoparticle Assembly Toward Volumetric Elements, Organic Electronics and Core-Shell Filaments.
Small Methods
March 2025
Department of Wood Science, The University of British Columbia, 2424 Main Mall #2900, Vancouver, BC, V6T 1Z1, Canada.
A nanoparticle-nanoparticle assembly is introduced using electrostatic complexation to precisely control volumetric structuring at the water/alcohol interface. In this system, an aqueous graphene oxide (GO) ink interacts electrostatically with partially deacetylated chitin nanofibers (mChNF), modified with benzophenone and dispersed in 1-butanol, which serves as the external phase. Upon extrusion of the GO ink, a jammed interfacial network forms, stabilizing the printed patterns within the external suspension, which provides suitable viscoelasticity for support-free printing.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!