Coupling diazotization with oxidase-mimetic catalysis to realize dual-mode double-ratiometric colorimetric and electrochemical sensing of nitrite

Wang, Mengzhu; Zhao, Menghao; Liu, Peng; Zhu, Hengjia; Liu, Bangxiang; Hu, Panwang; Niu, Xiangheng

doi:10.1016/j.snb.2021.131308

Cited by 46 publications

(8 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detection of nitrite is regarded as an essential step for contamination monitoring. Several techniques have been employed for nitrite detection, such as colorimetric [ 5 ], high-performance liquid chromatography (HPLC) [ 6 ], and electrochemical methods [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Polyaniline-Supported Nickel Oxide Flower for Efficient Nitrite Electrochemical Detection in Water

et al. 2023

View full text Add to dashboard Cite

A modified electrode with conducting polymer (Polyaniline) and NiO nanoflowers was prepared to detect nitrite ions in drinking water. A simple method was used to prepare the NiO nanoflower (NiOnF). Several techniques characterized the as-prepared NiOnF to determine the chemical structure and surface morphology of the NiO, such as XRD, XPS, FT-IR, and TGA. The activity of the electrode toward nitrite sensing was investigated over a wide range of pH (i.e., 2 to 10). The amperometry method was used to determine the linear detection range and limit. Accordingly, the modified electrode GC/PANI/NiOnf showed a linear range of detection at 0.1–1 µM and 1–500 µM. At the same time, the limit of detection (LOD) was 9.7 and 64 nM for low and high concentrations, respectively. Furthermore, the kinetic characteristics of nitrite, such as diffusion and transport coefficients, were investigated in various media. Moreover, the charge transfer resistance was utilized for nitrite electrooxidation in different pH values by the electrochemical impedance technique (EIS). The anti-interfering criteria of the modified surfaces were utilized in the existence of many interfering cations in water (e.g., K+, Na+, Cu2+, Zn2+, Ba2+, Ca2+, Cr2+, Cd2+, Pd2+). A real sample of the Nile River was spiked with nitrite to study the activity of the electrode in a real case sample (response time ~4 s). The interaction between nitrite ions and NiO{100} surface was studied using DFT calculations as a function of adsorption energy.

show abstract

Section: Introductionmentioning

confidence: 99%

Polyaniline-Supported Nickel Oxide Flower for Efficient Nitrite Electrochemical Detection in Water

et al. 2023

View full text Add to dashboard Cite

show abstract

“…It is reported that TMB and oxidized TMB (TMBox) may react with nitrite through two different reaction paths and mechanisms: diazotization interaction , and redox interaction. To confirm these, a series of experiments were performed.…”

Section: Resultsmentioning

confidence: 99%

Fe-Single-Atom Nanozyme Catalysts for Sensitive and Selective Detection of Nitrite via Colorimetry and Test Strips

Liu

Lin

Chen

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Here, a sensitive and selective strategy for the detection of nitrite via colorimetry and test strips was developed based on Fe-single-atom catalysts (Fe SACs) through the oxidation–reduction and diazotization reactions. Fe SACs possess excellent oxidase-like (OXD) catalytic activity, which can catalyze the oxidation of the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue TMBox with the appearance of an obvious absorbance peak at 652 nm in the presence of oxygen. With the addition of nitrite (NO2 –), the oxidation–reduction and diazotization reactions between TMB/TMBox and nitrite can induce the color of the solution to change from blue to green and finally to yellow, with the increase of the peak at 445 nm. Based on this strategy, a dual-signal-ratio colorimetric detection method for nitrite was proposed. Within the concentration range of 1–120 μM, the ratio of A 652/A 445 has a favorable linear relationship with the logarithm concentration of NO2 –, with a detection limit of 0.238 μM. By combining smartphones with the colorimetric method, a more intuitive, visual, and convenient test strip detection platform was developed, which can be utilized for the detection of nitrite within 2–200 μM. The analysis strategy based on the Fe-single-atom nanozyme catalysis integrated with the specific redox/diazotization reaction not only provides a dual-signal ratio sensing with good sensitivity but holds the advantage of good selectivity for the utilization of the specific chemical reaction, which has broad application prospects in food safety supervision and food screening.

show abstract

“…165 Wang et al reported carbon-supported Mn 3 O 4 NPs with OXD-like activity to develop a dual-mode and double-ratiometric colorimetric and electrochemical sensor, which was employed to detect nitrite with a LOD as low as 0.9 μM. 166 In summary, nanozymes have been successfully employed in the detection of various contaminants in agroproducts. To enhance their practical application in agroproducts, the following problems should be considered in future research: (1) Although the detection of contaminants in agrofoods occurred in the collected agroproduct samples, the potential risk to food should be taken into account due to the possible development of real-time detection in agricultural practice.…”

Section: Nanozymes In Agroproductsmentioning

confidence: 99%

“…On this basis, a sandwich immunosensor was successfully fabricated to detect Escherichia coli in agroproducts (infant milk powder, fresh yogurt, expired yogurt, and pure fresh milk) and achieved a LOD as low as 50 colony forming units (CFU) mL –1 and a detection range from 1.0 × 10 2 to 1.0 × 10 6 CFU mL –1 (Figure H) . Wang et al reported carbon-supported Mn 3 O 4 NPs with OXD-like activity to develop a dual-mode and double-ratiometric colorimetric and electrochemical sensor, which was employed to detect nitrite with a LOD as low as 0.9 μM …”

Section: Applications Of Nanozymes In Agriculturementioning

confidence: 99%

Lighting Up Agricultural Sustainability in the New Era through Nanozymology: An Overview of Classifications and Their Agricultural Applications

Cui

Zhang

et al. 2022

J. Agric. Food Chem.

View full text Add to dashboard Cite

With the concept of sustainable agriculture receiving increasing attention from humankind, nanozymes, nanomaterials with enzyme-like activity but higher environmental endurance and longer-term stability than natural enzymes, have enabled agricultural technologies to be reformative, economic, and portable. Benefiting from their multiple catalytic activities and renewable nanocharacteristics, nanozymes can shine in agricultural scenarios using enzyme engineering and nanoscience, acting as sustainable toolboxes to improve agricultural production and reduce the risk to agricultural systems. Herein, we comprehensively discuss the classifications of nanozymes applied in current agriculture, including peroxidase-like, oxidase-like, catalase-like, superoxide dismutase-like, and laccase-like nanozymes, as well as their biocatalytic mechanisms. Especially, different applications of nanozymes in agriculture are deeply reviewed, covering crop protection and nutrition, agroenvironmental remediation and monitoring, and agroproduct quality monitoring. Finally, the challenges faced by nanozymes in agricultural applications are proposed, and we expect that our review can further enhance agricultural sustainability through nanozymology.

show abstract

Coupling diazotization with oxidase-mimetic catalysis to realize dual-mode double-ratiometric colorimetric and electrochemical sensing of nitrite

Cited by 46 publications

References 54 publications

Polyaniline-Supported Nickel Oxide Flower for Efficient Nitrite Electrochemical Detection in Water

Polyaniline-Supported Nickel Oxide Flower for Efficient Nitrite Electrochemical Detection in Water

Fe-Single-Atom Nanozyme Catalysts for Sensitive and Selective Detection of Nitrite via Colorimetry and Test Strips

Lighting Up Agricultural Sustainability in the New Era through Nanozymology: An Overview of Classifications and Their Agricultural Applications

Contact Info

Product

Resources

About