Applications of two-dimensional layered nanomaterials in photoelectrochemical sensors: A comprehensive review

Recent advances in photoelectrocatalysis for environmental applications: Sensing, pollutants removal and microbial inactivation

Graphitic Carbon Nitride for Photoelectrochemical Detection of Environmental Pollutants

A highly selective HBT-based “turn-on” fluorescent probe for hydrazine detection and its application

Hydrogen sulfide (H2S) and biothiol molecules, such as glutathione (GSH), cysteine (Cys), and homocysteine (Hcy), play an important role in biology. However, understanding the complicated relationship between H2S and biothiols remains an enormous challenge owing to the difficulty in sensing H2S and biothiols simultaneously. Therefore, the development of probes for detecting H2S and biothiols is of great importance in biological science. In this work, we reported a novel fluorescent probe for the sensitive and selective detection of H2S and glutathione (GSH) simultaneously in different buffer solutions. The key design principle is based on a coumarin as the fluorophore structuring a fluorescent probe with three potential sites which could react with H2S and biothiols. This probe displays a rapid response with highly sensitive and selective detection of H2S and GSH (the detection limit of 75 nM and 280 nM, respectively). Moreover, with the assistance of a confocal fluorescence microscope, we demonstrated that the probe can be successfully applied for imaging H2S and GSH in MCF-7 cells.

A tri-site fluorescent probe for simultaneous sensing of hydrogen sulfide and glutathione and its bioimaging applications

In this work, on the basis of a Cu2+-doped two-dimensional material-based heterojunction photoelectrode, a novel anodic photoelectrochemical (PEC) sensing platform was constructed for highly sensitive detection of endogenous H2S. Briefly, with g-C3N4 and TiO2 as representative materials, the sensor was fabricated by modifying g-C3N4/TiO2 nanorod arrays (NAs) onto the surface of fluorine-doped tin oxide (FTO) and then doping Cu2+ as a CuxS (x = 1, 2) precursor. After the binding of S2− with surface-attached Cu2+, the signal was quenched owing to the in situ generation of CuxS which offers trapping sites to hinder generation of photocurrent signals. Since the photocurrent inhibition was intimately associated with the concentration of S2−, a highly sensitive PEC biosensor was fabricated for H2S detection. More importantly, the proposed sensing platform showed the enormous potential of g-C3N4/TiO2 NAs for further development of PEC bioanalysis, which may serve as a common basis for other semiconductor applications and stimulates the exploration of numerous high-performance nanocomposites.

/pdf/a-cu2-doped-two-dimensional-material-based-heterojunction-4ozy543112.pdf

A Cu2+-doped two-dimensional material-based heterojunction photoelectrode: application for highly sensitive photoelectrochemical detection of hydrogen sulfide

Based on ESIPT and heavy atom effect strategy, we firstly reported a new type of turn-on fluorescent probe for Hcy. This probe displayed fast response time (15 min), excellent selectivity over other interfering species and high sensitivity with a low detection limit of 1.6 × 10−7 M in PBS buffer containing 1% CH3CN (v/v). Moreover, the probe was also successfully applied for fluorescence imaging of Hcy in HeLa cells.

/pdf/hbt-based-turn-on-fluorescent-probe-for-discrimination-of-2ombdqkg3l.pdf

HBT-based turn-on fluorescent probe for discrimination of homocysteine from glutathione/cysteine and its bioimaging applications

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A Cu2+-doped two-dimensional material-based heterojunction photoelectrode: application for highly sensitive photoelectrochemical detection of hydrogen sulfide

HBT-based turn-on fluorescent probe for discrimination of homocysteine from glutathione/cysteine and its bioimaging applications