Smartphone-Assisted Plasmonic Nanosensor for Visual and Specific Sensing of Toxic Cyanide Ions by β−Cyclodextrin Templated Gold-Rich/Silver Bimetallic Alloy Nanoparticles DOI Open Access
Nguyễn Xuân Trường, Ramar Rajamanikandan,

Kandasamy Sasikumar

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(7), P. 1604 - 1604

Published: April 2, 2025

As cyanide ion (CN−), an ecologically harmful pollutant, has received incessant attention with growing industrialization on a global scale, the capability of on-site monitoring CN− contamination becomes increasingly crucial. In this work, we have fabricated simplistic plasmonic-sensing platform for CN−, which can be combined human naked eye visual monitoring. The main sensor part consisted β-Cyclodextrin (β−CD)-decorated gold-rich silver bimetallic alloy nanoparticles (β−CD-Ag/Au-rich NPs), while sensing analysis was performed by spectrophotometer or smartphone, where optical data gathered its camera were analyzed RGB color sensing. Upon introduction various quantities into β−CD-Ag/Au-rich NPs, spectral peak surface plasmon resonance (SPR) shifted from 488 nm to 496 nm. This redshift indicated strong etching reaction between NPs and demonstrating ultrahigh detection sensitivity, i.e., limit (LOD) 0.24 nM. During formation metal-cyano complexes in CN−-induced response observed naked-eye discernible change brownish-red colorless, allowing smartphone could also analyze colorimetric such process via sensing, LOD 1.35 nM, being still less than maximum concentration (1.91 nM) drinking water, is allowable World Health Organization (WHO). straightforwardness very high sensitivity proposed technique using may hold promise simplistic, affordable in-field examinations CN⁻ water.

Language: Английский

Recent Advances in Vanadate-Based Materials for Photocatalytic Hydrogen Production DOI Creative Commons

Kandasamy Sasikumar,

Heongkyu Ju

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 789 - 789

Published: Feb. 8, 2025

Metal vanadates are a developing group of semiconducting metal oxide materials that gaining increasing attention due to their great redox potential, effective separation photogenerated electron–hole pairs, and tunability structural physicochemical properties. Their rational design as photocatalysts can find use in various applications, including energy conversion/storage environmental remediation. In particular, one the viable ways address energy-related issues be through sustainable production hydrogen (H2), clean fuel produced by photocatalysis using vanadates. However, rapid recombination pairs limits practical photocatalysts, thus, many efforts have been devoted optimizing enhance efficiency. Herein, we provide comprehensive review deals with recent development strategies (Ni, Fe, Zn, Ag, In, Bi, rare earth, etc.) working mechanisms. synthesis, doping, cocatalyst loading, heterojunction creation, carbon loading also reviewed for photocatalytic H2 production. The challenges vanadate-based facing discussed along significant potential environmentally friendly

Language: Английский

Citations

0
Smartphone-Assisted Plasmonic Nanosensor for Visual and Specific Sensing of Toxic Cyanide Ions by β−Cyclodextrin Templated Gold-Rich/Silver Bimetallic Alloy Nanoparticles DOI Open Access
Nguyễn Xuân Trường, Ramar Rajamanikandan,

Kandasamy Sasikumar

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(7), P. 1604 - 1604

Published: April 2, 2025

As cyanide ion (CN−), an ecologically harmful pollutant, has received incessant attention with growing industrialization on a global scale, the capability of on-site monitoring CN− contamination becomes increasingly crucial. In this work, we have fabricated simplistic plasmonic-sensing platform for CN−, which can be combined human naked eye visual monitoring. The main sensor part consisted β-Cyclodextrin (β−CD)-decorated gold-rich silver bimetallic alloy nanoparticles (β−CD-Ag/Au-rich NPs), while sensing analysis was performed by spectrophotometer or smartphone, where optical data gathered its camera were analyzed RGB color sensing. Upon introduction various quantities into β−CD-Ag/Au-rich NPs, spectral peak surface plasmon resonance (SPR) shifted from 488 nm to 496 nm. This redshift indicated strong etching reaction between NPs and demonstrating ultrahigh detection sensitivity, i.e., limit (LOD) 0.24 nM. During formation metal-cyano complexes in CN−-induced response observed naked-eye discernible change brownish-red colorless, allowing smartphone could also analyze colorimetric such process via sensing, LOD 1.35 nM, being still less than maximum concentration (1.91 nM) drinking water, is allowable World Health Organization (WHO). straightforwardness very high sensitivity proposed technique using may hold promise simplistic, affordable in-field examinations CN⁻ water.

Language: Английский

Citations

0