l-proline covered N doped graphene quantum dots modified CuO/ZnO hexagonal nanocomposite as a robust retrievable catalyst in synthesis of substituted chiral 2-amino-4H-chromenes

Babaei, Pouria; Safaei‐Ghomi, Javad

doi:10.1016/j.matchemphys.2021.124668

Cited by 20 publications

(7 citation statements)

References 60 publications

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“…The bands at 463 cm −1 and 683 cm −1 can be attributed to the Zn–O bonds, specifically the bending vibration of the Zn–O–Zn bonds within the PAA-ZnO structure. Their intensity undergoes relative changes upon BCP loading 30 , 31 . Additionally, the absorption peak at 1072 cm −1 is a result of the symmetric stretching vibration of the Zn–O bond 30 , 31 .…”

Section: Resultsmentioning

confidence: 99%

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Exploring nanoarchitectonics and optical properties of PAA-ZnO@BCP wide-band-gap organic semiconductors

Mansour,

Abou Hammad,

El Nahrawy

2024

Sci Rep

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This work reports the formation of polyacrylic acid (PAA)—zinc oxide (ZnO)—bromocresol purple (BCP), (PAA-ZnO@ (0.00–0.01) BCP wide-bandgap organic semiconductors deposited onto glass substrates via a sol–gel polymerization process. These semiconductor films were deposited on glass substrates using a spin coating and then dried at 60 °C. The PAA-ZnO film appeared to be of amorphous phase, and films loaded with BCP revealed semicrystalline behavior. The surface of the films exhibited adherence and extended grains. The hydrogen bonds formed between PAA-ZnO and the BCP dye within the PAA-ZnO@BCP films was performed using FTIR-spectroscopy. The prepared nanocomposites demonstrate an indirect band transition which is affected slightly by adding ZnO and BCP dye. Optical parameters such as the absorption coefficient, the refractive index, the dielectric constant, optical conductivity, optical depth, and optical electronegativity of the prepared nanocomposites were studied as functions of incident light energy (wavelength). The PAA carbonyl group n-π* transition and BCP aromatic ring π-π* transitions were detected at about 285 (for all samples) and 432 nm (for BCP loaded samples), respectively. The superior photoluminescence characteristics observed in the BCP/PAA-Zn films excited with a wavelength of 250 nm indicated the successful loading of the BCP dye during the self-aggregation of the PAA-Zn film.

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Section: Resultsmentioning

confidence: 99%

“…Their intensity undergoes relative changes upon BCP loading 30 , 31 . Additionally, the absorption peak at 1072 cm −1 is a result of the symmetric stretching vibration of the Zn–O bond 30 , 31 .…”

Section: Resultsmentioning

confidence: 99%

Exploring nanoarchitectonics and optical properties of PAA-ZnO@BCP wide-band-gap organic semiconductors

Mansour,

Abou Hammad,

El Nahrawy

2024

Sci Rep

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“…Figure 22a Illustrates the processing and structure of a carboxymethylcellulose (CMC) and ZnO quantum dot (QD) coating [208] . Figure 22b shows the structural and compositional analysis of l‐proline‐assisted CuO/ZnO@N‐GQDs hexagonal nanocomposites designed for robust multicomponent reactions [209] . Figure 22c presents a schematic diagram of the ultraviolet (UV) light detection mechanism in a surface acoustic wave (SAW) sensor setup, employing a GQD@ZnO‐NWs composite material.…”

Section: Applications Of Carbon‐zno Quantum Dots Hybrid Nanocompositesmentioning

confidence: 99%

Nanostructured ZnO‐CQD Hybrid Heterostructure Nanocomposites: Synergistic Engineering for Sustainable Design, Functional Properties, and High‐Performance Applications

Mishra,

Chianella,

Sarkar

et al. 2024

ChemNanoMat

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Hybrid nanocomposites integrating nanostructured zinc oxide (ZnO) and carbon quantum dots (CQDs) with designed heterostructures possess exceptional optical and electronic properties. These properties hold immense potential for advancements across diverse scientific and technological fields. This review article investigates the synthesis, properties, and applications of ZnO‐CQD heterostructure nanocomposites. Recent breakthroughs in fabrication methods are examined, including hydrothermal, microwave‐assisted, and eco‐friendly techniques. Key preparation methods such as sol‐gel, co‐precipitation, and electrochemical deposition are discussed, emphasizing their role in controlling heterostructure formation. This review analyses the impact of heterostructures on optical and electronic properties, such as fluorescence, photoluminescence, and photocatalytic activity. Synergistic interactions between ZnO and CQDs within heterostructures are highlighted, demonstrating how they lead to substantial performance improvements. Applications of ZnO‐CQD heterostructures span solar cells, LEDs, photodetectors, water purification, antimicrobial treatments, gas sensing, catalysis, biomedical imaging, drug delivery, environmental sensing, and energy storage. Insights are provided into refining synthesis methods, enhancing characterisation techniques, and broadening the application landscape. Challenges like stability are addressed, along with strategies for optimised performance and practical implementation.

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“…The nanoflowers are tightly clustered; the SnS nanosheets are stacked layer by layer and are closely agglomerated to form this nanoflower-like structure, which increases their surface area. From previous studies, it is known that the morphology and size of nanomaterials has an effect on CTL [25], and this special sensing property can be attributed to its special hierarchical structure and flower-like morphology. The special nanoflower-like structure [26] not only facilitates a good connection between each SnS structure, but also maintains a large retention space for gas diffusion and adsorption.…”

Section: Materials Characterizationmentioning

confidence: 99%

A Strategy for Studying Environmental Engineering: Simple Hydrothermal Synthesis of Flower-Shaped Stannous Sulfide Nanomaterials for Efficient Cataluminescence Sensing of Diethyl Ether

Sun,

Fan,

Tang

et al. 2023

Molecules

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In this work, flower-like stannous sulfide (SnS) nanomaterials are synthesized using a hydrothermal method and used as sensitive materials for cataluminescence (CTL)-based detection of diethyl ether. Gas sensors based on SnS nanomaterials are prepared, and the SnS nanomaterials exhibit excellent gas-sensitive behavior towards ether. High sensitivity to ether is achieved at a relatively low operating temperature (153 °C) compared to other common sensors. The response time is 3 s and the recovery time is 8 s. The CTL intensity shows a good linear relationship (R2 = 0.9931) with a detection limit of 0.15 ppm and the concentration of ether in the range of 1.5–60 ppm. The proposed CTL sensor shows good selectivity towards ether. In addition, a highly stable signal is obtained with a relative standard deviation of 1.5%. This study indicates that the SnS-based sensor has excellent gas-sensitive performance and shows potential for applications in the detection of ether.

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l-proline covered N doped graphene quantum dots modified CuO/ZnO hexagonal nanocomposite as a robust retrievable catalyst in synthesis of substituted chiral 2-amino-4H-chromenes

Cited by 20 publications

References 60 publications

Exploring nanoarchitectonics and optical properties of PAA-ZnO@BCP wide-band-gap organic semiconductors

Exploring nanoarchitectonics and optical properties of PAA-ZnO@BCP wide-band-gap organic semiconductors

Nanostructured ZnO‐CQD Hybrid Heterostructure Nanocomposites: Synergistic Engineering for Sustainable Design, Functional Properties, and High‐Performance Applications

A Strategy for Studying Environmental Engineering: Simple Hydrothermal Synthesis of Flower-Shaped Stannous Sulfide Nanomaterials for Efficient Cataluminescence Sensing of Diethyl Ether

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