Structural, Morphological and Optical Properties of ZnO, ZnO:Ni2+ and ZnO:Co2+ Nanostructures by Hydrothermal Process and Their Photocatalytic Activity

Sheela, J. Arul Hency; Lakshmanan, Sivalingam; Manikandan, A.; Antony, S. Arul

doi:10.1007/s10904-018-0909-5

Cited by 26 publications

(10 citation statements)

References 31 publications

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“…The XRD patterns prove the difference in the molecular conformation of the PAN, PVDF, P-PVDF/ZnO nanofibers, and ZnO powder. As shown in Figure 5 d, the diffraction peaks at 2θ = 31.7, 34.4, 36.2, 47.5, 56.6, 62.8, 66.1, 67.9, and 69.0° correspond to the (100), (002), (101), (102), (110), (103), (200), (112), and (201) crystal faces of the ZnO hexagonal wurtzite structure, respectively [ 29 ]. The diffraction peaks at 2θ = 18.4 and 26.7° correspond to the crystallization peaks of the PVDF [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Piezoelectric Properties of Flexible Nanofibrous Membranes by Hierarchical Structures and Nanoparticles

et al. 2022

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Piezoelectric nanogenerators (PENGs) show superiority in self-powered energy converters and wearable electronics. However, the low power output and ineffective transformation of mechanical energy into electric energy l limit the role of PENGs in energy conversion and storage devices, especially in fiber-based wearable electronics. Here, a PAN-PVDF/ZnO PENG with a hierarchical structure was designed through electrospinning and a hydrothermal reaction. Compared with other polymer nanofibers, the PAN-PVDF/ZnO nanocomposites not only showed two distinctive diameter distributions of uniform nanofibers, but also the complete coverage and embedment of ZnO nanorods, which brought about major improvements in both mechanical and piezoelectric properties. Additionally, a simple but effective method to integrate the inorganic nanoparticles into different polymers and regulate the hierarchical structure by altering the types of polymers, concentrations of spinning solutions, and growth conditions of nanoparticles is presented. Further, the designed P-PVDF/ZnO PENG was demonstrated as an energy generator to successfully power nine commercial LEDs. Thus, this approach reveals the critical role of hierarchical structures and processing technology in the development of high-performance piezoelectric nanomaterials.

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Section: Resultsmentioning

confidence: 99%

Enhancement of Piezoelectric Properties of Flexible Nanofibrous Membranes by Hierarchical Structures and Nanoparticles

et al. 2022

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“…The infrared spectra of ZnO and ZnO/PTh 10 are represented in Figure S2. A broad peak between 3200 and 3700 cm −1 can be observed, which is due to the stretching vibration of the hydroxyl group (-OH) generated by the coordination of water molecules with the ZnO sample [21]. The peak between 1500 and 1650 cm −1 is attributed to the bending vibration of the -OH.…”

Section: Photocatalyst Characterizationmentioning

confidence: 97%

“…First, porous ZnO nanosheets were prepared using a hydrothermal method [21], as shown in Figure 1a. Subsequently, the thiophene monomers were polymerized on the surface of ZnO in an ice water bath using ammonium persulfate as a polymerization agent to form the composite material of ZnO/PTh x .…”

Section: Photocatalyst Characterizationmentioning

confidence: 99%

“…The peak between 1500 and 1650 cm −1 is attributed to the bending vibration of the -OH. A new peak appears near 1100 cm −1 in the spectrum of ZnO/PTh 10 , which is attributed to the vibration modes of the water molecules [21], indicating that ZnO/PTh 10 is more hydrophilic, and the PTh formed on the surface can be used as a mass transfer channel. The infrared peaks have not changed significantly after the introduction of PTh, which indicates that the core crystal structure of ZnO has not changed, which is consistent with the above XRD analysis result.…”

Section: Photocatalyst Characterizationmentioning

confidence: 99%

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Improving Separation Efficiency of Photogenerated Charges through Combination of Conductive Polythiophene for Selective Production of CH4

Deng

Wang

et al. 2023

Catalysts

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In today’s society, mankind is confronted with two major problems: the energy crisis and the greenhouse effect. Artificial photosynthesis can use solar energy to convert the greenhouse gas CO2 into high-value compounds, which is an ideal solution to alleviate the energy crisis and solve the problem of global warming. The combination of ZnO and polythiophenes (PTh) can make up for each other’s drawbacks, thus improving the photoresponse behavior and separation efficiency of the photogenerated carriers. The PTh layer can transfer photogenerated electrons to ZnO, thereby extending the lifetime of the photogenerated charges. The production rate of CH4 from the photoreduction of CO2 with ZnO/PTh10 is 4.3 times that of pure ZnO, and the selectivity of CH4 is increased from 70.2% to 92.2%. The conductive PTh can absorb photons to induce π–π* transition, and the photogenerated electrons can transfer from the LUMO to the conduction band (CB) of ZnO, thus more electrons are involved in the reduction of CO2.

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“…As of late, nanocrystalline spinel ferrites have intrigued novel auxiliary, attractive and electrical properties which regularly vary from these in microstructure scale [1,2]. These properties are appropriate for different applications, for example, segments in recording tape, attractive sensors, biomedical material and attractive reverberation imaging [3,4] and just as being a helpful impetus for synergist oxidation and furthermore corruption of colors [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Structural, Vibrational, Morphological and Magnetic Properties of Mn-doped CuFe2O4 Ferrite Nano-Photocatalysts

2019

IJITEE

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Unadulterated and Mn-doped CuFe2O4 nano-precious stones were effectively incorporated from its stoichiometric metal nitrates and urea blends, utilizing a microwave helped ignition strategy. Basic and attractive properties have been explored by XRD, FTIR, and VSM examination. Results uncovered that the as-arranged example is a cubic ferrite has high crystallinity. A minor of α-Fe2O3 stage is distinguished, because of inadequacy of response. The normal crystallite size of the as readied Mn-doped CuFe2O4 powders is around 20 to 25nm. FTIR spectra indicated two assimilation groups in the CuFe2O4 structure identified with octahedral and tetrahedral locales in the scope of 400-600 cm-1. The room temperature VSM aftereffects of the examples are speaking to the superparamagnetic conduct of the examples. The immersion polarization estimation of the as readied CuFe2O4 is 29 emu/g was watched and its worth increments to 39 emu/g after Mn-doping. The photocatalytic reactant movement for the as prepared samples was carried out using degradation of methylene blue. The results revealed that the samples are active catalyst.

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Structural, Morphological and Optical Properties of ZnO, ZnO:Ni2+ and ZnO:Co2+ Nanostructures by Hydrothermal Process and Their Photocatalytic Activity

Cited by 26 publications

References 31 publications

Enhancement of Piezoelectric Properties of Flexible Nanofibrous Membranes by Hierarchical Structures and Nanoparticles

Enhancement of Piezoelectric Properties of Flexible Nanofibrous Membranes by Hierarchical Structures and Nanoparticles

Improving Separation Efficiency of Photogenerated Charges through Combination of Conductive Polythiophene for Selective Production of CH4

Structural, Vibrational, Morphological and Magnetic Properties of Mn-doped CuFe2O4 Ferrite Nano-Photocatalysts

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