Porous microtubes of nickel-cobalt double oxides as non-enzymatic hydrogen peroxide sensors

TMB+-mediated etching of urchin-like gold nanostructures for colorimetric sensing

“…Herein, using this reaction, we aimed to demonstrate a proof-ofconcept analytical application for the detection of H 2 O 2 . H 2 O 2 is an important by-product of many enzymatic reactions and has been used as a target molecule of many biosensors [44][45][46]. For example, the oxidation of glucose by glucose oxidase (GOx) can produce H 2 O 2 , which is the actual target of electrochemical glucose meters.…”

Wedged DNA Walker Coupled with a Bimetallic Metal–Organic Framework Electrocatalyst for Rapid and Sensitive Monitoring of DNA Methylation

“…Metal–organic frameworks (MOFs) as a group of porous crystalline materials are constructed by the autoassemblages of metal cations, salts, and polydentate organic ligands, which have attracted substantial interest for sensor design, catalysis, gas storage, and separations. − The extraordinary characterizations, including the exceptionally high surface area, various tailorable functional groups, and tunable pore size, make MOFs an excellent candidate for catalyst development. − Particularly, the metallic components contributed to the significant catalytic activity of MOFs to different substances. For example, Ni and Co ions with easy coordination with organic ligands have exhibited high catalytic activity for H 2 O 2 detection. − Additionally, bimetallic MOFs are composed of two different metal ions in the inorganic nodes, exhibiting the synergistic effect and enhanced catalytic activity in comparison with their monometallic counterparts, which could enable the extended applications for catalysis reaction. − On the other hand, metal nanoparticles with desirable electrical conductivity and biocompatibility were usually coated on the MOFs to improve the poor conductivity of the MOFs. , However, the composites exhibited some loss of catalytic activity, which was caused by the poor thermodynamical stability and the high surface energy, which is a pressing need to address.…”

A novel metal–organic framework of Co-hemin for portable and visual colorimetric detection of 2,4-dichlorophenoxyacetic acid

“…Nanoenzymes are nanomaterials with enzyme-like characteristics, with merits of high stability, low-cost and superior catalytic activity. [17][18][19] Metal-organic frameworks (MOFs) are an emerging class of functional materials, which are formed by self-assembly of metal ions and organic linkers, with merits of high surface area, large pore volume and tunable shapes, and have been exploited for potential applications in gas storage, drug delivery, selective catalysis, electronic equipment and sensing. 20 Hemin, as one of the iron porphyrin derivatives, could be used for mimicking the active site of various enzymes.…”