Mesoporous ZnO nanorods array with a controllable area density for enhanced photocatalytic properties

Tian, Shouqin; Liu, Qiufen; Sun, Jianan; Zhu, Mingbei; Wu, Senwei; Zhao, Xiujian

doi:10.1016/j.jcis.2018.09.049

Cited by 17 publications

(10 citation statements)

References 36 publications

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“…The porosity in materials was found to add more surface defects that improves light absorption efficiency and increase the photocatalytic degradation activity. 47,59 The several past The metal oxides have a unique electronic configuration/ band gap that facilitates the absorption of a characteristic wavelength of light. However, the band edge positions of metal oxides are dependent on the surface charge.…”

Section: Resultsmentioning

confidence: 99%

“…The porosity in materials was found to add more surface defects that improves light absorption efficiency and increase the photocatalytic degradation activity. , The several past studies − revealed the fact that the charge transfer improvement of ZnO is due to the formation of a heterojunction with manganese oxides. In the study of the reflectance spectra of UV–vis-DRS analysis, we did not observe a band gap redshift due to Mn 2 O 3 incorporation on PVA-ZnO/Mn 2 O 3 nanocomposite spectra; therefore, we used a UV-light lamp as an irradiation source.…”

Section: Results and Discussionmentioning

confidence: 99%

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Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn₂O₃ Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

2020

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Zinc oxide is one of the novel metal oxides utilized for diverse applications. The sol−gel and unintended selfpropagation procedures were applied to synthesize the porous and high surface area ZnO-based metal oxide nanocomposite. The p-type manganese(III) oxide was successfully coupled with n-type ZnO. The physical property characterization results revealed the surface area, porosity, and charge transfer capability improvement on the poly(vinyl alcohol) (PVA)-aided binary nanocomposite (PVA-ZnO/Mn 2 O 3 ), compared to ZnO. The XRD patterns and TEM image analysis validated the nanometer size range for the materials (15−60 nm). The SEM micrographs and BET spectral details have confirmed the porous nature of the PVA-ZnO/Mn 2 O 3 nanocomposite. The supporting results were obtained from the HRTEM (IFFT) and SAED pattern analyses. The EDX and HRTEM analyses were used for the confirmation of elemental composition and reality of the PVA-ZnO/Mn 2 O 3 composite, respectively. The presence of the improved charge transfer property for PVA-ZnO/Mn 2 O 3 , compared to ZnO, was evidenced from acid orange-8 dye degradation. The highest zone of inhibition (14 mm) was recorded on Escherichia coli bacteria for the uncalcined PVA-ZnO/Mn 2 O 3 nanocomposite compared to PVA, yet, less zone of inhibition compared to the calcined PVA-ZnO/Mn 2 O 3 nanocomposite. The authors recommend the formation of the couple between metal oxides by electrochemical technique analyses as a future work.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn₂O₃ Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

2020

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“…ZnO shows high photocatalytic activity for the degradation of environmental pollutants due to its high abundance, weak toxicity, easy fabrication, chemical stability and low cost. Inspired by the extensive role of ZnO materials in both scientific and technological disciplines, much efforts have been devoted to synthesize them in various shapes and sizes, such as nanorods , nanosheets , nanospheres and nanoflowers . Unfortunately, the poor degradation activity caused by the low separation efficiency of photogenerated e − /h + leads to high cost consumption and greatly restricts the applications on photocatalytic degradation processes.…”

Section: Introductionmentioning

confidence: 99%

Morphology‐controlled Fabrication of SnO₂/ZnO Nanocomposites with Enhanced Photocatalytic Performance

Yao

Cao

et al. 2019

Photochem & Photobiology

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In this work, a series of novel SnO2/ZnO nanocomposites with different morphologies were fabricated via a facile hydrothermal technique followed by calcination in air. The morphological, structural and photocatalytic properties of the SnO2/ZnO nanocomposites were studied using different methods. The results showed that the synthesized nanocomposites possessed crystal phases of wurtzite hexagonal phase ZnO and tetragonal rutile phase SnO2. In addition, the morphologies of SnO2/ZnO nanocomposites strongly depended on the molar ratios of Sn and Zn. Compared with ZnO and SnO2, the SnO2/ZnO nanocomposites exhibited considerably higher degradation efficiency for the photodegradation of methylene blue and quinolone antibiotics under mercury lamp irradiation. The SZ‐2 nanospheres exhibited the highest degradation efficiency of 95.81%, which was about 2.63 times higher than that of ZnO nanoparticles. Moreover, the trapping experiments confirmed that ˙OH played the dominant role in MB degradation. Finally, the charge carriers potential transfer pathway and photocatalytic degradation mechanism were put forward. This study provides an economical way to prepare hybrid nanocomposites with controlled morphology for practical applications in the photocatalytic degradation of organic dyes and residual antibiotics.

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“…This indicates that PPL restricts the particle size and results in relatively large specific surface areas. However, the specific surface area of ZnO@PPL is still not as high as that of ZnO prepared by other surfactants. − This may be caused by the hierarchical structure of ZnO@PPL. Although nano-size slices of ZnO were found in the particles, they assembled into large pinecone-like morphology, which would reduce the surface area.…”

Section: Resultsmentioning

confidence: 97%

Design of a ZnO@Plant Polyphenol/Poly(vinyl alcohol) Film via Plant Polyphenol-Induced Cross-Linking and Its Enhanced UV Shielding and Antibacterial Performance

Pang

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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Its microstructures and morphology were examined by experimental techniques in conjunction with density functional theory calculations. Small pinecone-like particles of ZnO@PPL are accessible. As a coating layer, PPLs play two roles: (1) chemically couple with ZnO and control its size and (2) cross-link with each other and make ZnO slices build up a hierarchical structure. It has been found that ZnO@PPL bears good ultraviolet (UV) shielding performance by covering the entire UV light range. The fabricated ZnO@PPL/poly(vinyl alcohol) (ZnO@PPL/PVA) film inherits a remarkable UV shielding ability and blocks almost 100% irradiation between 200 and 420 nm. Moreover, the antibacterial activity and mechanism are also addressed.

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Mesoporous ZnO nanorods array with a controllable area density for enhanced photocatalytic properties

Cited by 17 publications

References 36 publications

Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn₂O₃ Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn₂O₃ Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

Morphology‐controlled Fabrication of SnO₂/ZnO Nanocomposites with Enhanced Photocatalytic Performance

Design of a ZnO@Plant Polyphenol/Poly(vinyl alcohol) Film via Plant Polyphenol-Induced Cross-Linking and Its Enhanced UV Shielding and Antibacterial Performance

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Mesoporous ZnO nanorods array with a controllable area density for enhanced photocatalytic properties

Cited by 17 publications

References 36 publications

Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn2O3 Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn2O3 Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

Morphology‐controlled Fabrication of SnO2/ZnO Nanocomposites with Enhanced Photocatalytic Performance

Design of a ZnO@Plant Polyphenol/Poly(vinyl alcohol) Film via Plant Polyphenol-Induced Cross-Linking and Its Enhanced UV Shielding and Antibacterial Performance

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Product

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Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn₂O₃ Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

Synthesis of Poly(vinyl alcohol)-Aided ZnO/Mn₂O₃ Nanocomposites for Acid Orange-8 Dye Degradation: Mechanism and Antibacterial Activity

Morphology‐controlled Fabrication of SnO₂/ZnO Nanocomposites with Enhanced Photocatalytic Performance