Zinc oxide/vanadium pentoxide heterostructures with enhanced day-night antibacterial activities

Sun, Haiyun; Yang, Zhaoqing; Pu, Yunfeng; Dou, Wenwen; Wang, Caiyu; Wang, Wenhui; Hao, Xiangping; Chen, Shougang; Shao, Qian; Dong, Mengyao; Wu, Shao-Yi; Ding, Tao; Guo, Zhanhu

doi:10.1016/j.jcis.2019.03.061

Cited by 164 publications

(46 citation statements)

References 81 publications

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“…Besides, the techniques and findings described in this study enable the production of biochemicals and bioenergy from the lignin. As compared with the metals, carbon, polymers and ceramics (32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49)(50), the lightweight makes this obtained lignin to be used together with other functional fillers for making multifunctional polymer nanocomposites suitable for various applications including electromagnetic interface (EMI) shielding (51)(52)(53)(54)(55), adsorbents for heavy metal, dye and spilled oil removal (56)(57)(58)(59)(60)(61)(62)(63)(64) and sensors (65)(66)(67)(68), etc.…”

Section: Discussionmentioning

confidence: 99%

Structural characterization of lignin from D. sinicus by FTIR and NMR techniques

Shi

Deng

et al. 2019

Green Chemistry Letters and Reviews

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144

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Milled wood lignin (MWL) was isolated from Dendrocalamus sinicus, an abundant bamboo variety in the earth, using Bjorkman method. Elucidation and quantification of the chemical structures for the isolated MWL have been facilitated by employing FT-IR and NMR techniques. The obtained results showed that the MWL consists of syringyl (S), guaiacyl (G), and p-hydroxyphenyl (H) units, indicating it as grass type (HGS) lignin. There is no significant change in structure (i.e. cleavage at α-O-4 ′ and β-O-4 ′ linkage) was observed. NMR techniques indicated that the isolated lignin was rich in β-O-4 ′ aryl ether substructures and syringyl (S) units. Furthermore, the sufficient understanding of the chemical structure of the lignin benefits their effective utilization towards the production of renewable biomass and biofuels.

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Section: Discussionmentioning

confidence: 99%

Structural characterization of lignin from D. sinicus by FTIR and NMR techniques

Shi

Deng

et al. 2019

Green Chemistry Letters and Reviews

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144

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“…Being safe and cost effective, ZnO NPs are among the most commonly used NPs (Jiang, Pi, & Cai, 2018;Siddiqi, Rahman, Husen, & Husen, 2018). They exert their antimicrobial activity via several mechanisms including: binding to membranes; disrupting their potential and integrity, inducing ROS production and their positive charges enhance destruction of organic material upon direct contact (Bondarenko et al, 2018;Mahmoud, Ali, Raafat, Badawy, & Elshahawy, 2018;Sun et al, 2019). The antimicrobial and antibiofilm activities of ZnO NPs against Gram-negative bacteria, Grampositive bacteria, and fungi was documented (Beyth et al, 2015;Gunalan, Sivaraj, & Rajendran, 2012;Jiang et al, 2018;Zvekić, Srdić, Karaman, & Matavulj, 2011), the antibacterial and antifungal activity of ZnO nanocomposites was also accentuated (Sikora et al, 2018;Yu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

In-vitro evaluation of antibacterial and antibiofilm efficiency of radiation-modified polyurethane–ZnO nanocomposite to be used as a self-disinfecting catheter

Hosny

Farrag

Helmy

et al. 2020

Journal of Radiation Research and Applied Sciences

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In the era of antibiotic resistance, antimicrobial polymers represent state of the art innovation evolved to fight biofilm-associated infections. In the present study, novel self-disinfecting polyurethane (PU) catheter materials were developed. Gamma radiation-induced graft copolymerization was used to functionalize PU using acrylic acid-co-glycidyl methacrylate (AAc/GMA) binary comonomer. The grafted PU, PU-g-(AAc-co-GMA), was subsequently modified by covalent immobilization of cefepime and/or wet in-situ intermatrix synthesis of ZnO (NPs) to produce PU-g-(AAc-co-GMA)/cefepime, PU-g-(AA-co-GMA-cefepime/ZnO and PU-g-(AAc-co-GMA)/ZnO nanocomposites, respectively. Modified polymers were characterized by Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and scanning electron microscope (SEM). Finally, the antibacterial and antibiofilm characteristics were evaluated against five multidrug-resistant (MDR) clinical bacterial isolates; including Gram-positive and Gram-negative microorganisms. FTIR confirmed the successful grafting and subsequent immobilization of cefepime. Formation of ZnO was verified by EDX analysis, while XRD analysis revealed the crystalline nature of ZnO NPs with a size range of 43-62 nm. Moreover, SEM showed the morphology, particle size and distribution of ZnO NPs within the prepared nanocomposites. The modified PU catheter nancomposites with or without cefepime showed excellent antibacterial and anti-biofilm characteristics. The prepared polymeric biocides could be potential candidates in medical care to combat biofilm formation on biomaterials.

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“…superoxide anion radical • O2 -and hydroxyl radical • OH) are able to partially or completely degrade organic contaminants including microbes. It has been claimed that ZnO can produce ROS even without light activation [16] -ROS production via releasing of trapped electrons, so called "photocatalysis in the dark" [17]. Therefore, not only metal ions but assumingly also ROS can contribute to the antimicrobial and self-cleaning nature of photocatalytic metal oxide based surfaces in dark conditions.…”

Section: Introductionmentioning

confidence: 99%

Selective antibiofilm properties and biocompatibility of nano-ZnO and nano-ZnO/Ag coated surfaces

Rosenberg

Visnapuu

Vija

et al. 2020

Preprint

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Spread of pathogenic microbes and antibiotic-resistant bacteria in health-care settings and public spaces is a serious public health challenge. Materials and surface-treatments that prevent solid surface colonization and biofilm formation or impede touch-transfer of viable microbes could provide means to decrease pathogen transfer from high-touch surfaces in critical applications. Both, ZnO and Ag nanoparticles have shown a great potential in antimicrobial applications. Although antimicrobial properties of such nanoparticle suspensions and their biocompatibility with human cells are well studied, less is known about nano-enabled solid surfaces. Here we demonstrate that surfaces coated with nano-ZnO or nano-ZnO/Ag composites possess species-selective medium-dependent antibiofilm activity against Escherichia coli, Staphylococcus aureus and Candida albicans. Colonization of nano-ZnO surfaces by E. coli and S. aureus was decreased in oligotrophic (nutrient-poor, no growth) conditions with E. coli showinghigher sensitivity to Ag and S. aureus to Zn, respectively. Minor to no effect was observed for bacteria in growth medium (nutrient-rich, exponential growth). Inversely, compared to uncoated surfaces, nano-ZnO surfaces enhanced biofilm formation by C. albicans in oligotrophic conditions and just a minor transient negative effect was seen in nutrient-rich medium. However, enhanced C. albicans biofilm formation on nano-ZnO surfaces was effectively counteracted by the addition of Ag. Our results not only showed that nano-ZnO/Ag coated solid surfaces have the potential to effectively decrease surface colonization by the bacteria E. coli and S. aureus but also indicated the importance of the use of application-appropriate test conditions and exposure medium in antimicrobial surface testing. Possible selective enhancement of biofilm formation by the yeast C. albicans on Zn-enabled surfaces should be taken into account in antimicrobial surface development.

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Zinc oxide/vanadium pentoxide heterostructures with enhanced day-night antibacterial activities

Cited by 164 publications

References 81 publications

Structural characterization of lignin from D. sinicus by FTIR and NMR techniques

Structural characterization of lignin from D. sinicus by FTIR and NMR techniques

In-vitro evaluation of antibacterial and antibiofilm efficiency of radiation-modified polyurethane–ZnO nanocomposite to be used as a self-disinfecting catheter

Selective antibiofilm properties and biocompatibility of nano-ZnO and nano-ZnO/Ag coated surfaces

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