Colorimetric and electrochemical arsenate assays by exploiting the peroxidase-like activity of FeOOH nanorods

Zhong, Xiaoli; Wang, Yi; Luo, Yuxi; Li, Zhimei; Liang, Ru‐Ping; Zhang, Li; Qiu, Jian‐Ding

doi:10.1007/s00604-019-3863-1

Cited by 22 publications

(7 citation statements)

References 35 publications

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“…FT-IR spectrum of FeOOH (Figure S5) showed a broad band at 3400–3100 cm –1 as the characteristic absorption of the hydroxyl group (−OH) . The absorption at ∼1633 cm –1 corresponded to the vibrations of the adsorbed water molecules .…”

Section: Resultsmentioning

confidence: 99%

Sensitivity Dependence on the Crystal Forms of a Fluorescence Quencher for Silicon Quantum Dots and Its Use in Acetylcholinesterase Assay

et al. 2021

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Acetylcholinesterase (AChE) plays crucial roles in the nervous system, and thus the reliable assay of its activity is of great significance for the diagnosis of nervous diseases. In this work, we report a fluorescent sensing platform with silicon quantum dots (Si-QDs) as a fluorescence oscillator and nano iron oxyhydroxide (α-, β-, and γ-FeOOH) as a quencher for the assay of AChE. FeOOH with α-, β-, and γ-crystal forms quenches the fluorescence of Si-QDs at λ ex /λ em = 350/438 nm, which is retrieved in the presence of AChE and its substrate acetylthiocholine (ATCh) to provide an off−on strategy with a high signal/noise ratio. It is interesting that the sensitivity of AChE sensing is closely related to the crystal forms of FeOOH, with the highest sensitivity by adopting α-FeOOH as the quencher. A linear calibration is achieved within 0.02−1.4 U/L along with a limit of detection of 0.016 U/L. The sensing strategy was demonstrated by the AChE assay in human blood, plasma, and hemocytes.

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Section: Resultsmentioning

confidence: 99%

Sensitivity Dependence on the Crystal Forms of a Fluorescence Quencher for Silicon Quantum Dots and Its Use in Acetylcholinesterase Assay

et al. 2021

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“…Then, it was diluted to 1 ml using ultrapure water, and the reaction occurred at constant temperature (37°C) for 30 min. The resulting mixture was allowed to stand for 20 min, and then the solution was transferred to a quartz cuvette for fluorescence detection and imaging [29].…”

Section: Experimental Steps and Measurement Methodsmentioning

confidence: 99%

Visualizing stimulus‐responsive dual‐ligand fluorescent probes for hypochlorite: A novel strategy for real application in tap water

et al. 2023

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As an effective ingredient of disinfectants, ClO À inevitably remains in water, which induces potential health hazards such as lung damage and kidney disease. In this study, we synthesized stimulus-responsive dual-ligand luminol-Tb-GMP coordination polymer nanoparticles (luminol-Tb-GMP CPNPs) as highly selective fluorescent probes for the real-time and visual detection of ClO À . CPNPs consist of Tb 3+ , a nuclear metal, that coordinates with GMP and luminol, an auxiliary ligand. GMP can be oxidized by ClO À and damage its structure, resulting in fluorescence quenching of CPNPs. The two-ligand CPNPs sensor has a rapid fluorescent response, significant fluorescent color change, and high sensitivity, with a linear range of 2-18 μM and a detection limit of 0.14 μM. It has been successfully used to detect ClO À in tap water, fountain water, and drinking water. Simultaneously, the portable filter paper strip was prepared to expand the range of applications outside the laboratory, which will provide a promising application for the real-time and semiquantitative analysis of ClO À .

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“…Because Hg 2+ hinders the combination of TMB and CGO, TMB is catalyzed by H 2 O 2 to produce more colored oxidation products, resulting in a more significant colorimetric response ( Figure 5 b), meaning, therefore, good detection of Hg 2+ . Zhong et al [ 60 ] used the peroxidase-like activity of iron hydroxide (FeOOH) nanorods to detect As(V) by colorimetry. Unlike TMB, the catalytic substrate is ABST, and its oxidation product is green and reaches the maximum absorption peak at 418 nm.…”

Section: Environmental Monitoringmentioning

confidence: 99%

Application of Nanozymes in Environmental Monitoring, Management, and Protection

et al. 2023

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Nanozymes are nanomaterials with enzyme-like activity, possessing the unique properties of nanomaterials and natural enzyme-like catalytic functions. Nanozymes are catalytically active, stable, tunable, recyclable, and versatile. Therefore, increasing attention has been paid in the fields of environmental science and life sciences. In this review, we focused on the most recent applications of nanozymes for environmental monitoring, environmental management, and environmental protection. We firstly introduce the tuning catalytic activity of nanozymes according to some crucial factors such as size and shape, composition and doping, and surface coating. Then, the application of nanozymes in environmental fields are introduced in detail. Nanozymes can not only be used to detect inorganic ions, molecules, organics, and foodborne pathogenic bacteria but are also involved in the degradation of phenolic compounds, dyes, and antibiotics. The capability of nanozymes was also reported for assisting air purification, constructing biofuel cells, and application in marine antibacterial fouling removal. Finally, the current challenges and future trends of nanozymes toward environmental fields are proposed and discussed.

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Colorimetric and electrochemical arsenate assays by exploiting the peroxidase-like activity of FeOOH nanorods

Cited by 22 publications

References 35 publications

Sensitivity Dependence on the Crystal Forms of a Fluorescence Quencher for Silicon Quantum Dots and Its Use in Acetylcholinesterase Assay

Sensitivity Dependence on the Crystal Forms of a Fluorescence Quencher for Silicon Quantum Dots and Its Use in Acetylcholinesterase Assay

Visualizing stimulus‐responsive dual‐ligand fluorescent probes for hypochlorite: A novel strategy for real application in tap water

Application of Nanozymes in Environmental Monitoring, Management, and Protection

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