Covalent organic framework film as an effective electrocatalyst for the simultaneous determination of dihydroxybenzene isomers in water samples

In Situ Generation of Regularly Ordered 2D Ultrathin Covalent Organic Framework Films for Highly Sensitive Photoelectrochemical Bioanalysis

“…Figure S3 shows the presence of C, N, and O elements in the D-TA COF film. In the high-resolution XPS spectra of C 1s (Figure B), a clear emission line at a binding energy of 285.7 eV was detected, which was attributed to the CN bonds . The CN bonds at 398.8 eV were also observed in the high-resolution XPS spectra of N 1s (Figure C). , These results were consistent with that observed in the Raman spectra, further confirming the formation of the imine linkers in the D-TA COF thin film.…”

Phenolic water toxins: redox mechanism and method of their detection in water and wastewater

“…30 Remarkably, the LODs for the target DHBIs attainable by using the stated platform are much better than any sensors reported so far. [2][3][4][5][6]8,[10][11][12][13][14][15] Hence, the designed electrochemical nanosensor is novel in the perspective of sensitivity, stability and selectivity.…”

“…Although a considerable progress for the detection of individual dihydroxybenzene isomers (DHBIs) i.e., HQ, CC, and RC has been made, but simultaneous detection of minute level concentration of these isomers is still a challenging task. To deal with this challenge a number of reports on synchronized micro to nanomolar detection of HQ, RC, and CC are available, [2][3][4][5][6][8][9][10][11][12][13][14][15] however, new materials are urgently required for picomolar to femtomolar simultaneous sensing of these isomeric water toxins. In this regard carbon nanotubes (CNTs) are promising materials for electrode modication by virtue of their structure that supports efficient electron transport.…”

“…26,27 Consequently, the distribution of bimetallic NPs onto large active surface of fCNTs network improves the physiochemical features such as conductivity, signal amplication and electrocatalytic performance of the nanosensor for the discrimination of target isomeric analytes. Literature survey [2][3][4][5][6][8][9][10][11][12][13][14][15] reveals that the reported sensors for the solo and concurrent detection of DHBIs demand improvement in sensitivity. Our designed sensing platform based on Au-Ag NPs decorated fCNTs present practically superior gures of merit for the target phenolic isomers than a plethora of electrode modiers such as protein units (amino acids), organic compounds (2,5-dimercapto-1,3,4-thiadiazole, 3,5-diamino-1,2,4-triazole-CO covalent organic frame work lm, polydiallyldimethylammonium chloride), inorganic conductors (metal NPs, amino functionalized ordered mesoporous silica), and carbonaceous compounds (nitrogen-doped carbon nanobers, porous graphene, graphene sheets embedded carbon).…”

“…Our designed sensing platform based on Au-Ag NPs decorated fCNTs present practically superior gures of merit for the target phenolic isomers than a plethora of electrode modiers such as protein units (amino acids), organic compounds (2,5-dimercapto-1,3,4-thiadiazole, 3,5-diamino-1,2,4-triazole-CO covalent organic frame work lm, polydiallyldimethylammonium chloride), inorganic conductors (metal NPs, amino functionalized ordered mesoporous silica), and carbonaceous compounds (nitrogen-doped carbon nanobers, porous graphene, graphene sheets embedded carbon). [2][3][4][5][6][7][8][9][10][11][12][13][14][15] To the best of our knowledge, this is the rst report about a sensor development that selectively senses the target isomers concurrently with detection limits in the femtomolar range.…”