Molecular imprinted BiOBr nanosheets for visual ultrasensitive chlorophenols detection by developing a dye-photosensitization sensing system.

The ultrasensitive, visual and intelligent identification of persistent chlorophenols (CPs) in complex drinking and environmental water matrices is highly desirable. In this study, we have established an interesting colorimetric dye eosin Y (EY)-molecular imprinted BiOBr nanosheet photosensitization sensing system for CPs detection, in which the key is the rapid EY photosensitization decolorization to be efficiently inhibited in the presence of CPs. It displays an ultrasensitive detection of CPs, especially for the typical 2,4,6-trichlorophenol (TCP) across from 10 ng·L to 1 mg·L, achieving a limit of detection of 7 ng·L with remarkable selectivity.

Visual Eosin Y-Based Photosensitization Sensing Systems for Ultrasensitive Detection of Diclofenac with Single-Atom Co─NO Site-Immobilized g-CN Nanosheets.

It is highly desired to develop a visual sensing system for ultrasensitive detection of colorless diclofenac (DCF), yet with a significant challenge. Herein, a novel dye-based photosensitization sensing system has been successfully developed for detecting DCF for the first time, in which the used dye eosin Y (DeY) can strongly absorb visible light and then be decolorized obviously by transferring photogenerated electrons to g-CN nanosheets (CN), while the built single-atomic Co─NO sites on CN by boron-oxygen connection can competitively adsorb DCF to impede the photosensitization decoloration of DeY. This system exhibits a broad detection range from 8 ng L to 2 mg L with 535 nm light, an exceptionally low detection limit (3.

Improving CO photoconversion with ionic liquid and Co single atoms.

Photocatalytic CO conversion promises an ideal route to store solar energy into chemical bonds. However, sluggish electron kinetics and unfavorable product selectivity remain unresolved challenges. Here, an ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate, and borate-anchored Co single atoms were separately loaded on ultrathin g-CN nanosheets.

Atomically Dispersed ZnN Sites Immobilized on g-C N Nanosheets for Ultrasensitive Selective Detection of Phenanthrene by Dual Ratiometric Fluorescence.

Ultrasensitively selective detection of trace polycyclic aromatic hydrocarbons (PAHs) like phenanthrene (PHE) is critical but remains challenging. Herein, atomically dispersed Zn sites on g-C N nanosheets (sZn-CN) are constructed by thermal polymerization of a Zn-cyanuric acid-melamine supramolecular precursor for the fluorescence detection of PHE. A high amount (1.

Current advances on g-CN-based fluorescence detection for environmental contaminants.

The development of highly-sensitive fluorescence detection systems for environmental contaminants has become high priority research in the past years. Special attention has been paid to graphitic carbon nitride (g-CN)-based nanomaterials, whose unique and superior optical property makes them promising and attractive candidates for this purpose. It is necessary to enhance the current understanding of the various classes of g-CN-based fluorescence detection systems and their mechanisms, as well as find suitable approaches to improve detection performance for environmental monitoring, protection, and management.

Construction of Six-Oxygen-Coordinated Single Ni Sites on g-C N with Boron-Oxo Species for Photocatalytic Water-Activation-Induced CO Reduction.

The configuration regulation of single-atom photocatalysts (SAPCs) can significantly influence the interfacial charge transfer and subsequent catalytic process. The construction of conventional SAPCs for aqueous CO reduction is mainly devoted toward favorable activation and photoreduction of CO , however, the role of water is frequently neglected. In this work, single Ni atoms are successfully anchored by boron-oxo species on g-C N nanosheets through a facile ion-exchange method.