Synthesis of caged iodine-modified ZnO nanomaterials and study on their visible light photocatalytic antibacterial properties

Jin, Yubo; Long, Jintao; Ma, Xi; Zhou, Tanghua; Zhang, Zizhong; Lin, Huaxiang; Wang, Xuxu

doi:10.1016/j.apcatb.2019.117873

Cited by 92 publications

(40 citation statements)

References 45 publications

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“…Photocatalysis is a highly efficient and inexpensive technique to inhibit and kill the bacteria [17][18][19][20]. It is based on the photochemical properties of semiconductor photocatalyst to generate reactive oxygen species (ROS), superoxide anion (O À 2 ) radicals under external energy such as the natural energy of sunlight [20][21][22]. TiO 2 , a wide band gap semiconductor (3.2 eV), is generally used as a photocatalyst in the presence of ultraviolet (UV) radiation [23,24].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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The demand of medical materials for rapid and efficient elimination of bacteria has seen a dramatic surge over the past few years. In this study, antibacterial nanofilms with reactive oxygen species were generated by photocatalysis. To prepare these nanofilms, Ag and amorphous TiO 2 nanoparticles decorated on polydopamine (PDA) were coated on three-dimensional (3D) nanopore arrays, which was fabricated on a substrate of anodized stainless steel. All the antibacterial tests were conducted with a household flashlight, which may be considered as a practical approach for antibacterial materials. The photoelectrochemical property of the 3D Ag/TiO 2 /PDA nanofilm on 316L stainless steel (Ag/TiO 2 /PDA SS) was about 15 times higher than that of the annealed Ag/ TiO 2 /PDA SS, and consequently, it exhibited higher antibacterial activity. The enhanced photoelectrochemical property is attributed to the successful separation of electrons (amorphous TiO 2 ) and holes (Ag nanoparticles). Further, when a plate containing 3D Ag/TiO 2 /PDA SS was irradiated with visible light just for 10 min, it immediately destroyed the bacteria in 10 6 CFU/mL without any bacterial colony. After five weeks, there were still no bacterial colonies in the plate corresponding to Ag/TiO 2 /PDA SS under visible light, while Ag/TiO 2 / PDA SS in dark had a negligible effect on the bacteria, i.e., the antibacterial mechanism through direct contact and ion dissolution was not efficient. The excellent antibacterial properties of 3D Ag/TiO 2 /PDA SS illuminated by flashlight provides an efficient, facile, and cost-effective technique for the development of antibacterial medical materials to meet the increasing demand of eliminating bacterial infections.

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Section: Introductionmentioning

confidence: 99%

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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“…[38,42,43] Indeed, the changes in the intensity of the peak O V might be associated with the changes in the concentration of oxygen vacancies. In addition, oxygen vacancies are known to affect the luminescence properties and certainly act as active sites for catalytic reaction, [20,[44][45][46] thereby improving the performance. As perceived in spectra, the content of O V in ZSWHT displays the substantial increase as compared with that of ZnO belt (ZB), suggesting that interfaces at the grains generate more oxygen vacancies as observed by their morphological features.…”

Section: Preparation Morphology Evolution and Physicochemical Propermentioning

confidence: 99%

“…A deeper examination foreseen that the broad DEB can be the superimposition of various emissions including violet, blue, green and orange-red emission representing different types of defects in the electrospun ZnO structures. [44][45][46][47][48][49][50][51][52] The defects are expected to act as charge traps in the nanostructured sample and they are strongly associated with the nature of the defect center. Although tremendous efforts have been shed light on the correlation between the structure and energetic center of these defects, still their precise emission nature at room temperature remains under dispute.…”

Section: Investigations On Structure-photoluminescence Property Corrementioning

confidence: 99%

“…Overall, the predicted energetic location of each center is well agreed with theoretical calculations and various experimental results available in the literature so far. [44][45][46][47][48][49][50][51][52] The detailed investigation predicted that the variations in the relative intensity of ZB to ZST might be ascribed to the presence of radiative defects at the interface of the grains in the ZnO. The relative areas of each emission for all samples have been calculated and plotted in Figure 5h.…”

Section: Investigations On Structure-photoluminescence Property Corrementioning

confidence: 99%

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General Strategy for Fabrication of Ordered One Dimensional Inorganic Structures by Electrospinning: Structural Evolution From Belt to Solid via Hollow Tubes

et al. 2021

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Increasing profound interest in methods to fabricate complex hollow superstructures in terms of shell architecture is highly desirable for the realization of various functionalities. Recent efforts in this direction have strongly suggested that unlike other hollow structures, tubular structures do not have well-developed nanostructure library, and establishing a general method remains a significant challenge. Hollowstructured metal oxides have emerged as one of the most propitious functional materials by virtue of their hollow interior, shell composition, internal structure, low density, high surface area, and fast diffusion ability. [1][2][3][4] These solitary and exceptional characteristics have made them outstand in various fields including catalysis, chemical sensors, adsorption, and energy conversion/storage systems. [5][6][7][8][9][10][11][12] The recent past has significantly seen dimensionally controlled structures to be drawing recognition because of their correlation between the structure and property in surfaceenhanced applications. In this aspect, intensive efforts have taken place to develop diverse approaches for assembling hollow structures to optimize their physicochemical properties for specific applications. Consequently, this has been upheld through varied synthesis routes and numerous hollow structures such as spheres, boxes, and micro/nanotubes have been fabricated. [13,14] To raise the value of appropriate functionalities and exploit the structural advantages in surface-enhanced applications, welldefined shell structures with tunable size, shape, composition, and pores are highly desirable. However, most of the reported hollow structures possess relatively simple configuration which strongly limits their prospects to modulate potential characteristics. This remains as a substantial challenge to structural aspects including the shell thickness, number of internal multishells, porosity, and importantly unsuitable for large-scale synthesis. Among the different methods for preparing the hollow structures, template-assisted synthesis has been recognized as a straightforward method because of the predictability of the resultant shapes originating from the sacrificed templates. [15][16][17][18] Although the templating strategy has enabled the successful preparation of hollow structures; however, it still possess few critical challenges. They include the cost, tedious and timeconsuming coating procedure, nonuniformity of coating, reproducibility, additional steps to remove the template without collapsing the original structure, and scalability. Furthermore, the

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“…The same tendency occurred when natural sunlight was used as the light source. Importantly, the catalytic performance of ZnO@ZnS micro/nanoferns in the photoremediation of MB, 4-NP, or Rh-B was comparable to or better than that of the most competitive state-of-the-art ZnO photocatalysts [27][28][29][30][31][32][33].…”

Section: Photooxidation Of Popsmentioning

confidence: 99%

Bioinspired ZnO-Based Solar Photocatalysts for the Efficient Decontamination of Persistent Organic Pollutants and Hexavalent Chromium in Wastewater

2019

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Biomimetic/bioinspired engineering and sulfidation processes are effective strategies for improving the visible light-driven photocatalytic performance of ZnO photocatalysts. A facile electrodeposition process in high oxygen-flux conditions was used to synthesize well-defined fractal micro/nanoferns, consequently increasing the photocatalyst’s light-trapping capability and the accessible active surface. Next, a simple sulfidation process was used to form a thin layer of ZnS, producing ZnO@ZnS core@shell micro/nanoferns, thereby tuning the optoelectronic properties and extending the photoresponse to the visible region. The ZnO@ZnS micro/nanoferns exhibited clear superiority over other ZnO photocatalysts in the photooxidation of persistent organic pollutants (POPs) and the photoreduction of Cr(VI). Their excellent photocatalytic performance allowed the photodegradation under UV-filtered sunlight of nearly 97% of methylene blue after 60 min; the mineralization of >98% of a mixture of methylene blue, 4-nitrophenol, and rhodamine-B after 210 min; and the removal of nearly 65% of Cr(VI) after 180 min. In addition, the ZnO@ZnS micro/nanoferns demonstrated a good ability to decontaminate an inorganic-organic bipollutant system, with promising potential to leverage synergistic effects. Finally, these micro/nanoferns presented great recyclability and reusability for both photooxidation and photoremediation processes. These findings support that sulfidation and biomimetic engineering can be a superior route for designing efficient sunlight-driven ZnO-photocatalysts for water decontamination.

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Synthesis of caged iodine-modified ZnO nanomaterials and study on their visible light photocatalytic antibacterial properties

Cited by 92 publications

References 45 publications

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

General Strategy for Fabrication of Ordered One Dimensional Inorganic Structures by Electrospinning: Structural Evolution From Belt to Solid via Hollow Tubes

Bioinspired ZnO-Based Solar Photocatalysts for the Efficient Decontamination of Persistent Organic Pollutants and Hexavalent Chromium in Wastewater

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