Building porphyrin-based MOFs on MXenes for ppb-level NO sensing

Abstract

Fractional exhaled nitric oxide (FeNO) is a significant biological signaling molecule. However, the detection of ppb-level Nitric oxide (NO) still faces great challenges. Herein, we designed and papered a...

A bio-inspired and switchable H+/OH− ion-channel for room temperature exhaled CO2 chemiresistive sensing

“…The preparation process of the CO 2 sensor is similar to our previous report. [31][32][33][34] Briey, 5 mL of sensing material dispersion (0.1 mg mL −1 ) was drop-coated on interdigital electrodes (IDEs) and dried at 50 °C for 30 min. The resistance change of the prepared sensor was recorded with a Keithley 2450 source meter (Tektronix, USA).…”

“Visualization” Gas—Gas Sensors Based on High Performance Novel MXenes Materials

“…At the same time, MXenes (such as Ti 3 C 2 T x ) are prone to oxidation and deterioration, leading to severe baseline drift and poor recovery of the sensor. In addition to VOCs, NH 3 , NO 2 , and CH 4 gases, MXenes and their composite materials are also used for gas detection such as hydrogen, [180,[190][191][192][193] hydrogen sulfide, [164,[194][195][196][197][198] carbon dioxide, [189,190] and methane. [191,192] The widespread application of MXenes in various gas detection indicates that MXenes can be used as a multifunctional sensitive material.…”

“…In addition to VOCs, NH 3 , NO 2 , and CH 4 gases, MXenes and their composite materials are also used for gas detection such as hydrogen, [180,[190][191][192][193] hydrogen sulfide, [164,[194][195][196][197][198] carbon dioxide, [189,190] and methane. [191,192] The widespread application of MXenes in various gas detection indicates that MXenes can be used as a multifunctional sensitive material. [193][194][195][196][197] Therefore, the specificity and selectivity of MXenes for specific gases urgently need to be further improved through modification, [198][199][200][201][202][203] doping, [204][205][206][207] and composite strategies.…”

Design and application of dual-emission metal–organic framework-based ratiometric fluorescence sensors

“…1 In general, transition metal ions with unfilled d orbitals are selected as metal centers to accept lone pairs of electrons from ligands, and ligands containing at least one polydentate functional group are selected to decoordinate metal ions. 2 Due to advantages such as simple synthesis routes, large specific surface areas, high porosities, and easy modifications, MOFs have been widely used in the fields of gas storage and separation, [3][4][5] catalysis, [6][7][8] sensing, [9][10][11] and drug delivery. [12][13][14] In these applications, the use of MOFs as fluorescent materials to construct sensors for a variety of targets is popular due to…”