Enhanced photoelectron transfer from light-harvesting antenna of phycocyanin to Fe3O4 hierarchical structure

Zhang, Wenyan; Kuang, Caiyuan; Chen, Xiaoyu; Yang, Xiaoli

doi:10.1016/j.apsusc.2021.150652

Cited by 6 publications

(1 citation statement)

References 36 publications

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“…[ 23 ] The three fitted peaks in the high‐resolution spectrum of O 1s were ascribed to the lattice oxide (O 2– ), OH bonds, and the absorbed water (H 2 O), respectively. [ 24 ] Typical peaks of Ti 2p were observed in Figure 3h, and the peaks at 458.86 and 464.55 eV were attributed to the binding energies of Ti 2p 3/2 and Ti 2p 1/2 , which confirmed the presence of Ti 4+ in the composites. [ 25 ] The high‐resolution spectrum of Mo 3d was shown in Figure 3i, the fitted peaks at 228.75, 232.16, and 236.09 eV were assigned to Mo 4+ 3d 5/2 , Mo 4+ 3d 3/2 , and Mo 6+ , respectively.…”

Section: Resultsmentioning

confidence: 83%

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe₃O₄@hollow‐TiO₂@MoS₂ Nanochains for Tetracycline Determination

Sun

Zhou

et al. 2023

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Herein, for the first time, the CRISPR‐Cas12a system is combined with aptamer, cascaded dynamic DNA network circuits, and Fe3O4@hollow‐TiO2@MoS2 nanochains (Fe3O4@h‐TiO2@MoS2 NCs) to construct an efficient sensing platform for tetracycline (TC) analysis. In this strategy, specific recognition of the target is transduced and amplified into H1‐H2 duplexes containing the specific sequence of Cas12a‐crRNA through an aptamer recognition module and the dual amplification dynamic DNA network. Subsequently, the obtained activated Cas12a protein non‐specifically cleaves the adjacent reporter gene ssDNA‐FAM to dissociate the FAM molecule from the quencher Fe3O4@h‐TiO2@MoS2 NCs, resulting in the recovery of the fluorescence signal and further signal amplification. Particularly, the synthesized multifunctional Fe3O4@h‐TiO2@MoS2 NCs composites also exhibit superb magnetic separability and photocatalytic degradation ability. Under optimal conditions, the aptasensor displays a distinct linear relationship with the logarithm of TC concentration, and the limit of detection is as low as 0.384 pg mL−1. Furthermore, the results of spiked recovery confirm the viability of the proposed aptasensor for TC quantification in real samples. This study extends the application of the CRISPR‐Cas12a system in the field of analytical sensing and contributes new insights into the exploration of reliable tools for monitoring and treating hazards in food and environment.

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Section: Resultsmentioning

confidence: 83%

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe₃O₄@hollow‐TiO₂@MoS₂ Nanochains for Tetracycline Determination

Sun

Zhou

et al. 2023

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Highly active iron oxide@N catalyst derived from the iron acetate/polyacrylonitrile threads: Driving nitroarene conversion to value‐added amines

Rubab,

Sharif,

Razzaq

et al. 2024

J of Applied Polymer Sci

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Chemoselective reduction of nitroarenes to corresponding arylamines is a significant reaction in the chemical industry. However, in the presence of other reducible groups, including halogenated nitrobenzene, nitrobiphenyl, and nitroquinoline in the same molecule of nitroaromatics, the control of chemoselectivity remains challenging. Here, a facile fabrication of a heterogeneous iron‐based catalyst is reported as a potential alternative to precious metal catalysts for the chemoselective reduction of nitroarenes. The pyrolysis of iron acetate/polyacrylonitrile (PAN) template under an inert atmosphere furnishes active Fe3O4 nanoparticles (NPs) encapsulated in nitrogen‐doped (N‐doped) carbon layers, which can provide more catalytic active sites (Fe3O4/PAN@800). Notably, non‐precious iron oxide NPs supported on N‐doped carbon support prevent aggregation, thereby enhancing the catalytic activity. The sustainable and reusable Fe3O4/PAN@800 catalyst, having only 0.8% metal content as demonstrated by x‐ray photoelectron spectroscopy, delivers excellent yields of corresponding amines from differently functionalized nitroarenes. Hydrogenation of a series of structurally functionalized nitroarenes produced excellent yields of anilines, which serve as building blocks and intermediates for fine and bulk chemicals. Hydrogenation of 2‐chloro‐3‐nitropyridine, 2‐nitro‐1,1′‐biphenyl, ortho‐nitroaniline, and 4‐aminophenyl acrylonitrile yielded respective anilines up to 99%. The active sites of Fe3O4 have magnetic performance, hence, the catalyst can be easily recovered using a magnet and reused for at least five cycles without significant loss of catalytic activity. Therefore, the easily prepared, cost‐effective, and reusable Fe3O4/PAN@800 catalyst presented in this study shows potential for applications in the selective reduction of aromatic nitro compounds. Consequently, this study potentially establishes a guideline for the facile preparation of abundant transition‐non‐noble metal‐based reusable supported catalysts for various applications in the chemical industry.

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Plasmonic MoO3-x nanosheets by anodic oxidation of molybdenum for colorimetric sensing of hydrogen peroxide

Ahmadzadeh

Ranjbar

2022

Analytica Chimica Acta

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Enhanced photoelectron transfer from light-harvesting antenna of phycocyanin to Fe3O4 hierarchical structure

Cited by 6 publications

References 36 publications

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe₃O₄@hollow‐TiO₂@MoS₂ Nanochains for Tetracycline Determination

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe₃O₄@hollow‐TiO₂@MoS₂ Nanochains for Tetracycline Determination

Highly active iron oxide@N catalyst derived from the iron acetate/polyacrylonitrile threads: Driving nitroarene conversion to value‐added amines

Plasmonic MoO3-x nanosheets by anodic oxidation of molybdenum for colorimetric sensing of hydrogen peroxide

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Enhanced photoelectron transfer from light-harvesting antenna of phycocyanin to Fe3O4 hierarchical structure

Cited by 6 publications

References 36 publications

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe3O4@hollow‐TiO2@MoS2 Nanochains for Tetracycline Determination

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe3O4@hollow‐TiO2@MoS2 Nanochains for Tetracycline Determination

Highly active iron oxide@N catalyst derived from the iron acetate/polyacrylonitrile threads: Driving nitroarene conversion to value‐added amines

Plasmonic MoO3-x nanosheets by anodic oxidation of molybdenum for colorimetric sensing of hydrogen peroxide

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Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe₃O₄@hollow‐TiO₂@MoS₂ Nanochains for Tetracycline Determination

Cascade DNA Circuits Mediated CRISPR‐Cas12a Fluorescent Aptasensor based on Multifunctional Fe₃O₄@hollow‐TiO₂@MoS₂ Nanochains for Tetracycline Determination