Brush-like SnO2/ZnO hierarchical nanostructure: Synthesis, characterization and application in UV photoresponse

Dai, Jun; Xu, Chunxiang; Guo, Jiyuan; Xu, Xiaoyong; Zhu, Gangyi; Lin, Yi

doi:10.1063/1.4811174

Cited by 26 publications

(11 citation statements)

References 53 publications

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“…Remarkably, under red light illumination, the properties were inferiort o other kinds of illumination. However,i ti si nteresting that the 0.3 gZ FP CNT (77) photodetectors still exhibited ab etter photoresponses witch ratio than for the other photodetectors, 0.1 g ZFP CNT (38), 0.5 gZ FP CNT (28) or as-prepared ZnO NRs (23).…”

Section: Resultsmentioning

confidence: 93%

“…To illustrate the effectiveness of the addition of SFP and CNTs into ZnO materials, we subjected the 0.3 gZ FP CNT materials to furthers tructural and opticala nalysis, primarily TEM investigation and HRTEM/EDX analysis. [20] 228 15 69 20 ZnO NRs/La [21] 212 0.2 10 --ZnO NRs/NiO [22] 165 80 36 .4 11 ZnO NRs/ SnO 2 [23] 13.3 24 5--ZnO NRs Biofilms [13] 10 15 16 12 ZnO NRs/PE-DOT.PSS [24] 37.6 0.1…”

Section: Discussionmentioning

confidence: 99%

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Bio‐industrial Waste Silk Fibroin Protein and Carbon Nanotube‐Induced Carbonized Growth of One‐Dimensional ZnO‐based Bio‐nanosheets and their Enhanced Optoelectronic Properties

Saravanan

Huang

Kathiravan

2018

Chemistry A European J

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High performance UV/Visible photodetectors are successfully fabricated from ZnO/fibroin protein-carbon nanotube (ZFP ) composites using a simple hydrothermal method. The as-fabricated ZnO nanorods (ZnO NRs) and ZFP nanostructures were measured under different light illuminations. The measurements showed the UV-light photoresponse of the as-fabricated ZFP nanostructures (55,555) to be approximately 26454 % higher than that of the as-prepared ZnO NRs (210). This photodetector can sense photons with energies considerably smaller (2.75 eV) than the band gap of ZnO (3.22 eV). It was observed that the finest distribution of fibroin and CNT into 1D ZnO resulted in rapid electron transportation and hole recombination via carbon/nitrogen dopants from the ZFP . Carbon dopants create new energy levels on the conduction band of the ZFP , which reduces the barrier height to allow for charge carrier transportation under light illumination. Moreover, the nitrogen dopants increase the adsorptivity and amount of oxygen vacancies in the ZFP so that it exhibits fast response/recovery times both in the dark and under light illumination. The selectivity of UV light among the other types of illumination can be ascribed to the deep-level energy traps (E ) of the ZFP . These significant features of ZFP lead to the excellent optical properties and creation of new pathways for the production of low-cost semiconductors and bio-waste protein based UV/Visible photodetectors.

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Section: Resultsmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Bio‐industrial Waste Silk Fibroin Protein and Carbon Nanotube‐Induced Carbonized Growth of One‐Dimensional ZnO‐based Bio‐nanosheets and their Enhanced Optoelectronic Properties

Saravanan

Huang

Kathiravan

2018

Chemistry A European J

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“…The deconvoluted PL spectrum of ZnO–SnO x in Figure 2 d exhibits three peaks. The emission at around 390 nm is from the near-band-edge transition of ZnO [ 38 , 49 ]. In addition, the emission of surface-localized excitons on the SnO x shell layer is also in this wavelength range [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Kumar

Mazinani

et al. 2021

IJMS

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Functional nanocomposites with biopolymers and zinc oxide (ZnO) nanoparticles is an emerging application of photocatalysis in antifouling coatings. The reduced chemical stability of ZnO in the acidic media in which chitosan is soluble affects the performance of chitosan nanocomposites in antifouling applications. In this study, a thin shell of amorphous tin dioxide (SnOx) was grown on the surface of ZnO to form ZnO–SnOx core–shell nanoparticles that improved the chemical stability of the photocatalyst nanoparticles, as examined at pH 3 and 6. The photocatalytic activity of ZnO–SnOx in the degradation of methylene blue (MB) dye under visible light showed a higher efficiency than that of ZnO nanoparticles due to the passivation of electronic defects. Chitosan-based antifouling coatings with varying percentages of ZnO or ZnO–SnOx nanoparticles, with or without the glutaraldehyde (GA) crosslinking of chitosan, were developed and studied. The incorporation of photocatalysts into the chitosan matrix enhanced the thermal stability of the coatings. Through a mesocosm study using running natural seawater, it was found that chitosan/ZnO–SnOx/GA coatings enabled better inhibition of bacterial growth compared to chitosan coatings alone. This study demonstrates the antifouling potential of chitosan nanocomposite coatings containing core–shell nanoparticles as an effective solution for the prevention of biofouling.

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“…However, by decreasing the electrical resistivity by means of extrinsic defects generated by donor doping, ZnO films turn into transparent conductive oxides (TCO) with applications of increasing technological interest such as transparent electrodes, solar cell anodes, light emitting diodes, liquid crystal displays, and touch‐screens, among others . Another interesting application that has gained attention is the use of ZnO in UV photodetectors for safety devices, flame detection, optical communication, industrial packaging/sealing lines and monitoring of artificially illuminated working environments …”

Section: Introductionmentioning

confidence: 99%

Effects of Grain Size on the UV‐Photoresponse of Zinc Oxide Thin Films Grown by Spray‐Pyrolysis

Villegas

Aldao

Savú

et al. 2018

Physica Status Solidi (a)

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Zinc oxide films with different average grain size are deposited on glass substrates by spray‐pyrolysis at 425 °C. Samples are characterized by XRD, UV–Vis transmittance, FE‐SEM, and electrical properties measurements. The increase in conductivity observed under 365 nm wavelength illumination is evaluated in terms of grain size. Films with small grains (120 nm) show higher response with respect to films with larger grains (230 and 300 nm). A model considering resistivity and grain size for the prediction of the response of films in terms of UV‐to‐dark conductivity ratio is proposed and validated with experimental results.

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Brush-like SnO2/ZnO hierarchical nanostructure: Synthesis, characterization and application in UV photoresponse

Cited by 26 publications

References 53 publications

Bio‐industrial Waste Silk Fibroin Protein and Carbon Nanotube‐Induced Carbonized Growth of One‐Dimensional ZnO‐based Bio‐nanosheets and their Enhanced Optoelectronic Properties

Bio‐industrial Waste Silk Fibroin Protein and Carbon Nanotube‐Induced Carbonized Growth of One‐Dimensional ZnO‐based Bio‐nanosheets and their Enhanced Optoelectronic Properties

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Effects of Grain Size on the UV‐Photoresponse of Zinc Oxide Thin Films Grown by Spray‐Pyrolysis

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