BiOI hierarchical nanoflowers as novel robust peroxidase mimetics for colorimetric detection of H₂O₂

Abstract

BiOI hierarchical nanoflower was developed as a novel, simple and highly sensitive biomimetic catalyst and used for colorimetric detection of H2O2.

2D CTAB-MoSe2 Nanosheets and 0D MoSe2 Quantum Dots: Facile Top-Down Preparations and Their Peroxidase-Like Catalytic Activity for Colorimetric Detection of Hydrogen Peroxide

“…This indicates that Ȯ 2 − radical plays the major role to oxidize TMB to produce a TMB oxide and generate color contrast. Based on our finding and several previous reports [ 67 , 68 ], we propose the peroxidase-like catalytic mechanism of our MoSe 2 –based enzymes, which is illustrated in Figure 12 . In the reaction process, TMB molecules are absorbed on the surface of MoSe 2 –based nanomaterials and act as the chromogenic electron donors.…”

Enhanced Peroxidase-Like Activity of MoS2 Quantum Dots Functionalized g-C3N4 Nanosheets towards Colorimetric Detection of H2O2

“…In addition, the Brunauer Emmett Teller (BET) specific surface area is a significant affecting factor for the catalytic abilities of catalysts, which was determined by the nitrogen adsorption method [23,24,45]. And the specific surface areas of MoS 2 @CNNS(15), MoS 2 @CNNS(30), MoS 2 @CNNS(45), CNNS, and MoS 2 QDs were measured as 45.58, 75.93, 69.37, 29.85 and 16.13 m 2 /g, respectively.…”

“…To explore the roles of active species played in the catalytic reaction, the active species trapping experiments were carried out. In brief, scavengers (10.0 mM IPA, a scavenger of ⋅OH; 10.0 mM BQ, a scavenger of ⋅O 2 − ) were added into the reaction systems respectively to remove the active species under the optimal experimental conditions [23,24,43]. Then, the absorbance and color change of the reaction system was recorded at 652 nm by an UV-visible spectrophotometer.…”

“…Thus, the field for seeking novel nanomaterials such as peroxidase mimetics has been rapidly developed since Fe 3 O 4 magnetic nanoparticles were first found to present the intrinsic peroxidase-like activity like that of horseradish peroxidase (HRP) in 2007 [4]. Thereafter, many kinds of nanomaterials have been exploited as peroxidase mimetics, and have exhibited good peroxidase-like properties, such as magnetic nanomaterials (CoFe 2 O 4 [12] and FeVO 4 [13]), carbon nanomaterials (carbon nanotubes [14], carbon dots [15], graphene oxides [16], and C 3 N 4 [17]), noble metal nanomaterials (gold, silver and platinum) [18] and their alloys (AgVO 3 nanobelts [19], FeSe-Pt@SiO 2 nanospheres [20], Fe 3 O 4 -Pt nanocomposites [21], and Fe 3 O 4 -Au nanohybrids [22]), and other nanomaterials (BiOI nanoflowers [23], CeVO 4 nanorods [24] and MoS 2 nanoflakes [25]). Despite this progress, there is still an urgent demand to pursue novel nanomaterials with highly-efficient and stable peroxidase-like activities to overcome their inherent disadvantages, including the loss of noble metals, environmental pollution, difficulty in separation, and recyclability.…”

Chemical vapor deposition graphene combined with Pt nanoparticles applied in non-enzymatic sensing of ultralow concentrations of hydrogen peroxide

“…Hence, effective detection of H 2 O 2 is of great necessity for biological and chemical analysis. 1,2 Many methods have been developed for this purpose in recent years, with these methods including chemiluminescence, 3 spectro-uorimetry, 4 chromatography, 5 electrochemical methods, 6 and so forth. Among them, electrochemical methods based on nonenzymatic detection of H 2 O 2 have been widely studied due to their advantages in convenience, low cost and repeatability.…”