AuNPs/NiFe-LDHs-assisted laser desorption/ionization mass spectrometry for efficient analysis of metronidazole and its metabolites in water samples

Li, Lingyu; Qiu, Zhichang; Qi, Yuanfeng; Zhao, Dantong; Ali, Iftikhar; Sun, Chenglong; Xu, Longhua; Zheng, Zhenjia; Ma, Chunxia

doi:10.1016/j.jhazmat.2021.126893

Cited by 24 publications

(15 citation statements)

References 42 publications

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“…Several experiments were performed to examine this possibility: i) the XPS spectrum of the Au 3+modified NMOFs was compared to the reported XPS spectrum of AuNPs. [86,87] The results are displayed in Figure 1G. No overlaying band could be detected.…”

Section: Resultsmentioning

confidence: 94%

Au³⁺‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O₂^•− and •OH Generating Nanozymes and Their Antibacterial Functions

Pan

Ouyang

Song

et al. 2022

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The synthesis and characterization of Au3+ -modified UiO-67 metal-organic framework nanoparticles, Au 3+ -NMOFs, are described. The Au 3+ -NMOFs reveal dual oxidase-like and peroxidase-like activities and act as an active catalyst for the catalyzed generation of O 2 •− under aerobic conditions or •OH in the presence of H 2 O 2 . The two reactive oxygen species (ROS) agents O 2 •− and •OH are cooperatively formed by Au 3+ -NMOFs under aerobic conditions, and in the presence of H 2 O 2. The Au 3+ -NMOFs are applied as an effective catalyst for the generation ROS agents for antibacterial and wound healing applications. Effective antibacterial cell death and inhibition of cell proliferation of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacterial colonies are demonstrated in the presence of the Au 3+ -NMOFs. In addition, in vivo experiments demonstrate effective wound healing of mice wounds infected by S. aureus, treated by the Au 3+ -NMOFs.

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Section: Resultsmentioning

confidence: 94%

Au³⁺‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O₂^•− and •OH Generating Nanozymes and Their Antibacterial Functions

Pan

Ouyang

Song

et al. 2022

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“…The FTIR spectra of the samples are shown in Figure . The broad bands centered at 3346 and 1617 cm –1 are assigned to the O–H stretching modes, bending modes of the interlayer water molecules, and the H-bonded OH groups in LDH, respectively . The intense peaks at 1352 and 781 cm –1 were assigned to the v 3 vibration and the bending modes of CO 3 2– , respectively.…”

Section: Resultsmentioning

confidence: 98%

“…The broad bands centered at 3346 and 1617 cm −1 are assigned to the O−H stretching modes, bending modes of the interlayer water molecules, and the H-bonded OH groups in LDH, respectively. 17 The intense peaks at 1352 and 781 cm −1 were assigned to the v 3 vibration and the bending modes of CO 3 2− , 18 respectively. The bands at 615 and 547 cm −1 are due to M−O vibrations and bending modes in the brucite-like lattice of CoAl−LDH.…”

Section: X-ray Powder Diffraction and Fourier Transform Infraredmentioning

confidence: 99%

Rational Design and Preparation of Pt–LDH/CeO₂ Catalyst for High-Efficiency Photothermal Catalytic Oxidation of Toluene

Liu

Pei

Liang

et al. 2022

ACS Appl. Mater. Interfaces

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Volatile organic compounds (VOCs) are attracting much more attention due to their contributions to air pollution and human health problems. Photothermal catalytic oxidation is considered as an energy-saving method for the removal of VOCs. However, the efficiency of the photothermal catalytic system is still suffering from the low activity of the catalyst due to its poor response to visible light and low efficiency of charge separation. Here, few-layer CoAl–LDH (layered double hydroxide) was prepared as an advantageous support for loading Pt nanoparticles to obtain Pt–LDH, which were coated on CeO2 nanoparticles. Type II heterojunctions were formed on the interface of LDH and CeO2. In photocatalysis, the hot electrons will move to CeO2, which is better at the activation of O2 molecules, and holes will concentrate on the LDHs, which have plenty of hydroxyls to generate •OH radicals. Furthermore, the Schottky heterojunctions between LDH and Pt nanoparticles benefit the improvement of light absorption by the localized surface plasmon resonance of Pt nanoparticles. As a consequence, a high removal rate of toluene (75.7%) at a weight-hourly space velocity of 23340 mL/(g·h) under visible light irradiation (160 mW/cm2, λ > 400 nm) at room temperature was achieved over the Pt–LDH/CeO2 catalyst. The catalyst design provides a useful method to prepare high-efficiency photothermal catalysts.

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“…The mass spectrometry analysis followed our previous method, with minor modifications [ 22 ]. A mixture of DHB and CHCA standards were used for calibration of the mass analyzer, and mixed DHB/CHCA (1:1, w / w ) solution was prepared in 0.1% TFA buffer (ACN/MeOH/water, 70:25:5, v / v / v ) at 20 mg/mL [ 23 ]. The intensity and the global attenuator offset were set to 70% and 15%, respectively, and the repetition rate and frequency were 1000 Hz and 5000 Hz, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The moving distance of the nozzle was 3 mm, the number of spraying cycles was 18, and the spraying density of the optimal matrix on the slice was approximately 0.0025 mg/mm 2 . After matrix spraying, the mixture of DHB/CHCA (1:1, w / w ) solution was dropped on the ITO glass slides where there were no sections of A. lappa roots for molecular weight correction [ 23 ].…”

Section: Methodsmentioning

confidence: 99%

Visualizing the Spatial Distribution of Arctium lappa L. Root Components by MALDI-TOF Mass Spectrometry Imaging

Qiu

Jiang

et al. 2022

Foods

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This study is aimed at developing novel analytical methods to accurately visualize the spatial distribution of various endogenous components in Arctium lappa L. (A. lappa) roots, and to precisely guide the setting of pre-treatment operations during processing technologies and understand plant metabolism process. The matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) imaging technology was used for visual demonstration of the in situ spatial distribution in A. lappa roots. This work consisted of four steps: matrix selection, section preparation, matrix coating, and MALDI-TOF MS imaging analysis. Consequently, eight saccharides, four caffeoylquinic acids, four flavonoids, six amino acids, one choline, and one phospholipid were imaged and four unidentified components were found. Saccharides were distributed in the center, whereas caffeoylquinic acids and flavonoids were mainly present in the epidermis and cortex. Furthermore, amino acids were mainly detected in the phloem, and choline in the cambium, while phosphatidylserine was found in the secondary phloem and cambium. This study demonstrated that MALDI-TOF MS imaging technology could provide a technical support to understand the spatial distribution of components in A. lappa roots, which would promote the processing technologies for A. lappa roots and help us to understand the plant metabolism process.

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AuNPs/NiFe-LDHs-assisted laser desorption/ionization mass spectrometry for efficient analysis of metronidazole and its metabolites in water samples

Cited by 24 publications

References 42 publications

Au³⁺‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O₂^•− and •OH Generating Nanozymes and Their Antibacterial Functions

Au³⁺‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O₂^•− and •OH Generating Nanozymes and Their Antibacterial Functions

Rational Design and Preparation of Pt–LDH/CeO₂ Catalyst for High-Efficiency Photothermal Catalytic Oxidation of Toluene

Visualizing the Spatial Distribution of Arctium lappa L. Root Components by MALDI-TOF Mass Spectrometry Imaging

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AuNPs/NiFe-LDHs-assisted laser desorption/ionization mass spectrometry for efficient analysis of metronidazole and its metabolites in water samples

Cited by 24 publications

References 42 publications

Au3+‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O2•− and •OH Generating Nanozymes and Their Antibacterial Functions

Au3+‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O2•− and •OH Generating Nanozymes and Their Antibacterial Functions

Rational Design and Preparation of Pt–LDH/CeO2 Catalyst for High-Efficiency Photothermal Catalytic Oxidation of Toluene

Visualizing the Spatial Distribution of Arctium lappa L. Root Components by MALDI-TOF Mass Spectrometry Imaging

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Product

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Au³⁺‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O₂^•− and •OH Generating Nanozymes and Their Antibacterial Functions

Au³⁺‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O₂^•− and •OH Generating Nanozymes and Their Antibacterial Functions

Rational Design and Preparation of Pt–LDH/CeO₂ Catalyst for High-Efficiency Photothermal Catalytic Oxidation of Toluene