A low-cost and label-free assay for hydrazine using MnO2 nanosheets as colorimetric probes

Manganese Dioxide Nanosheets‐Induced Oxidation of Dopamine for Colorimetric Sensing of Hydrogen Sulfide

“…The UV‐vis absorption spectrum displays a wide absorption band in the range of 200–500 nm as shown in Figure S2. The maximum absorption peak is located at 374 nm, which is attributed to the d‐d transition of Mn(IV) ions in the MnO 6 octahedron of MnO 2 . These results confirm that MnO 2 nanosheets are successfully synthesized.…”

Self-assembly of 2D MnO2nanosheets into high-purity aerogels with ultralow density

“…The colour change of the aerogels can be attributed to the transformation of MnO 2 into Mn(OH) 2 by the reducing gas. 58 A reported N 2 H 4 -sensitive colorimetric probe ( Fig. 4c ) was then prepared according to a previously reported method, 58 and was used for the detection of residual hydrazine to verify the adsorption efficiency of MnO 2 aerogels.…”

“… 58 A reported N 2 H 4 -sensitive colorimetric probe ( Fig. 4c ) was then prepared according to a previously reported method, 58 and was used for the detection of residual hydrazine to verify the adsorption efficiency of MnO 2 aerogels. No evident colour change of the colorimetric probe has be observed (top inset of Fig.…”

A Sensitive and Selective Method for Visual Chronometric Detection of Copper(II) Ions Using Clock Reaction

“…Although the plasmonic nanoparticle-based assays are able to improve the sensitivity, the nanoparticle probes are easily affected by environmental conditions such as salts, temperature, and thiol-containing substances. [18][19][20][21][22][23][24][25][26] Moreover, the plasmonic nanoparticle is metastable, which gradually aggregates with time. These drawbacks seriously influence their analytical performance in terms of accuracy, reproducibility, and practicality.…”