High-Efficiency Photo-Generated Charges of ZnO/TiO<sub>2</sub> Heterojunction Thin Films for Photocatalytic and Antibacterial Performance

Ton, Nu Quynh Trang; Le, Thi Ngoc Tu; Kim, Sangho; Dao, Vinh Ai; Yi, Junsin; Vu, Thi Hanh Thu

doi:10.1166/jnn.2020.17306

Cited by 27 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ZnO thin-film antimicrobial properties were evaluated by the interaction of the microbial cells with the surface of the ZnO thin films under UV-A irradiation, as followed by the previous report [ 9 , 47 , 50 ] ( Figure 1 ). Thin-film samples of 1 cm × 1 cm, previously sterilized with 70% ethanol for 2 h and rinsed in sterile deionized water, then were placed in 12-weel sterilized cell culture plates (SPL Life Sciences Co., Ltd., Pocheon-si, Gyeonggi-do, Korea).…”

Section: Methodsmentioning

confidence: 99%

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

2022

View full text Add to dashboard Cite

Zinc oxide thin films have been developed through thermal oxidation of Zinc thin films grown by high impulse power magnetron sputtering (HiPIMS). The influence of various sputtering power on thin film structural, morphological, photocatalytic, and antimicrobial properties was investigated. X-ray diffraction (XRD) analysis confirmed that the crystalline phase of ZnO thin films consists of a hexagonal wurtzite structure. Increasing the sputtering power will lead to intrinsic stress on thin films that promote whisker formation. In this study, whiskers were successfully developed on the thin films without precursors/catalysts and not thermally treated over the Zn melting point. This finding showed that the film phase structure and morphology are significantly affected by sputtering power. It was found that ZnO thin films exhibit high photocatalytic performance under UV irradiation (89.91%) of methylene blue after 300 min of irradiation. The antimicrobial activity on ZnO thin films showed significant inhibition activity (p < 0.05) against E. coli, S. aureus, and C. albicans. However, the whisker formation on ZnO thin films is not accessible to enhance photocatalytic and antimicrobial activity. This study demonstrates that the HiPIMS method through the thermal oxidation process can promote a good performance of ZnO thin films as photocatalyst and antimicrobial agents.

show abstract

Section: Methodsmentioning

confidence: 99%

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

2022

View full text Add to dashboard Cite

show abstract

“…TiO 2 material could deeply oxidize most of the toxic organic substances [5]. This major discovery attracted a large amount of scholars' interests, and there have been many outcomes related TiO 2 material [6][7][8][9][10][11][12]. However, TiO 2 has a large forbidden band width (about 3.2 eV) and cannot absorb solar light efficiently.…”

Section: Introductionmentioning

confidence: 99%

g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation

et al. 2020

View full text Add to dashboard Cite

Vehicle exhaust seriously pollutes urban air and harms human health. Photocatalytic technology can effectively degrade automobile exhaust. This work prepared g-C3N4/CeO2 photocatalytic material by constructing heterojunctions. Four kinds of g-C3N4/CeO2 composite photocatalytic materials with different mass ratios were prepared. An indoor exhaust gas purification test was carried out under natural light and ultraviolet light irradiations. The optimum mass ratio of g-C3N4 material and CeO2 material was determined by evaluating the exhaust gas degradation effective. Moreover, the structure and morphology of the g-C3N4/CeO2 composite were investigated with microscopic characterization experiments (including XRD, TG-DSC, FT-IR, UV-Vis, SEM and XPS). The results obtained were that the optimum mass ratio of g-C3N4 material to CeO2 material was 0.75. The degradation efficiencies under ultraviolet irradiation in 60 min for HC, CO, CO2, NOX were 7.59%, 12.10%, 8.25% and 36.82%, respectively. Under visible light conditions, the degradation efficiency in 60 min for HC, CO, CO2 and NOX were 15.88%, 16.22%, 10.45% and 40.58%, respectively. This work is useful for purifying automobile exhaust in the future.

show abstract

“…Thus, they can decompose various components of microorganisms and be used to kill germs. In addition, O 2 − has a high reduction capacity and also plays a role in antibacterial performance [38][39][40]. ZnO + hv → e − + h + (2)…”

Section: Antibacterial Properties Of E-spun Fibersmentioning

confidence: 99%

Preparation and Performance of Ultra-Fine Polypropylene Antibacterial Fibers via Melt Electrospinning

Fan

et al. 2020

Polymers

View full text Add to dashboard Cite

Polypropylene (PP) fibers are employed commonly as the raw material of technical textiles (nonwovens), and the research focuses on fine-denier fibers and their functionalities. In this work, antibacterial PP masterbatches with different dosage (1–5 wt.%) of nano-ZnO particles as the antibacterial agent were prepared via a twin-screw extruder. The as-prepared PP masterbatches were electrospun on a home-made electrospinning device to afford ultra-fine PP fibers. The morphologies of as-spun ultrathin PP fibers with 16 μm of average diameter were observed by SEM. The structure and element distribution were characterized by means of energy-dispersive spectroscopy (EDS) and Fourier-transfer infrared spectroscopy (FTIR), respectively. There was some zinc obviously distributed on the surface when a dosage of ZnO more than 1 wt.% was used, which contributed to the antibacterial activity. The crystallinity of PP fibers was not affected strongly by the dosage of ZnO based on the differential scanning calorimetry (DSC) heating curves, while thermal decomposition improved with the increase in ZnO content, and the mechanical strength decreased predictably with the increase in inorganic ZnO content.

show abstract

High-Efficiency Photo-Generated Charges of ZnO/TiO₂ Heterojunction Thin Films for Photocatalytic and Antibacterial Performance

Cited by 27 publications

References 0 publications

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation

Preparation and Performance of Ultra-Fine Polypropylene Antibacterial Fibers via Melt Electrospinning

Contact Info

Product

Resources

About

High-Efficiency Photo-Generated Charges of ZnO/TiO2 Heterojunction Thin Films for Photocatalytic and Antibacterial Performance

Cited by 27 publications

References 0 publications

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation

Preparation and Performance of Ultra-Fine Polypropylene Antibacterial Fibers via Melt Electrospinning

Contact Info

Product

Resources

About

High-Efficiency Photo-Generated Charges of ZnO/TiO₂ Heterojunction Thin Films for Photocatalytic and Antibacterial Performance