Preparation, characterization, antifungal activity, and mechanism of chitosan/TiO<sub>2</sub> hybrid film against <i>bipolaris maydis</i>

Huang, Qunzeng; Jiao, Zhujin; Li, Min; Qiu, Dongfang; Liu, Kecheng; Shi, Hengzhen

doi:10.1002/app.38322

Cited by 26 publications

(10 citation statements)

References 37 publications

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“…Among the photocatalysts, TiO 2 has received considerable attention due to its good chemical stability, nontoxicity, low cost, high photocatalytic activity, and antibacterial property . The photocatalytic property of TiO 2 generates highly reactive radical with a highly oxidative and reactive nature under UV‐light irradiation can completely decompose the contaminants and also kills the microbes.…”

Section: Introductionmentioning

confidence: 99%

Novel chitosan-TiO₂ nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

2013

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In this report, chitosan (CS) encapsulated titanium dioxide (TiO2) nanohybrid was prepared by chemical precipitation method. Fourier transform infrared spectroscopy (FT‐IR) and X‐ray diffraction (XRD) confirmed the formation of nanohybrid. Transmission electron microscopy (TEM) analysis showed the immobilization of TiO2 nanoparticles on the surface of CS. The nanohybrid was also characterized by thermogravimetric analysis (TGA) and zeta potential. The nanohybrid exhibited high photocatalytic activity as evident from the degradation of methylene blue (MB) dye. The result revealed substantial degradation of the MB dye (90%) under UV‐light illumination. The catalytic efficiency was unaltered even after five cycles of reuse. In addition, the nanohybrid exhibited a superior antibacterial activity of 100% within 24 h of treatment against Escherichia coli (E. coli) was measured by colony forming units (CFU). POLYM. COMPOS., 35:327–333, 2014. © 2013 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Novel chitosan-TiO₂ nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

2013

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“…Fig.5 (a,b) indicate the zeta potential of TiO 2 NPs and CS/TiO 2 nanocomposite prepared by chemical method. The zeta potential of TiO 2 NPs was found to be -21.6 mV as the pH of dispersion medium (distilled water) is higher than that pH at PZC of TiO 2 NPs [29]. It was found that the zeta potential of TiO 2 NPs was shifted to +2.73 mV after the chemical reaction with CS.…”

Section: Morphologymentioning

confidence: 95%

“…As shown in Fig.1, at solution pH values lower than that of pH at PZC, TiO 2 NPs surface has positive charge, whereas at solution pH values higher than pH at PZC, the surface of TiO 2 NPs becomes negatively charged. This is described by equations, (1) and (2) [29].…”

Section: Preparation Of Cs/tio 2 Nanocompositementioning

confidence: 99%

“…As showed in Fig.2b, a proper pH value below the pH at PZC of TiO 2 NPs and the pKa of CS will enable both the surface of TiO 2 NPs and the molecular chains of CS to be positively charged. Under the electrostatic repulsion forces between the nanoparticles and the polymer matrix, the flexible chains of CS molecules can be fully stretched out, resulting in dispersion of TiO 2 NPs in CS matrix [29].…”

Section: Physical Routementioning

confidence: 99%

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Chitosan/TiO2 nanocomposites: Effect of microwave heating and solution mixing techniques on physical properties

Hussein¹,

Abdaleem²,

Darwish³

et al. 2020

Egypt. J. Chem.

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C HITOSAN/titanium oxide nanocomposite (CS/TiO 2 nanocomposite) could be prepared by different physical and chemical methods for various applications. CS/TiO 2 nanocomposite has been chemically prepared via microwave heating technique and physically prepared through solution mixing method. Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM) and dynamic light scattering (DLS) were used as spectral tools to characterize the functionality, phase, morphology and particles size of the prepared nanocomposites, respectively. The thermal stability was investigated by the thermogravimetric analysis (TGA), while optical properties were studied using ultraviolet-visible spectroscopy (UV-vis).The results have confirmed that CS/TiO 2 nanocomposite was chemically and physically prepared via the outer sphere complexation and the electrostatic repulsion between chitosan and titanium oxide nanoparticles surface (TiO 2 NPs), respectively. The thermal stability was enhanced with nanocomposite prepared by chemical method when compared to that prepared by the physical method. In addition, a significant shift in the peak of the chemically prepared nanocomposite from the UV region to visible region was observed. This shift could be attributed to the surface modification of TiO 2 NPs by the chemical reaction.

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“…Chitosan is a partially deacetylated chitin that has been shown to possess a wide spectrum of antibacterial activity [ 21 , 22 ]. Chitosan’s antimicrobial mechanisms include increasing the permeability of the microbial wall or chelation trace metals [ 23 , 24 ]. Gelatin is derived from type I collagen composed of glycine- and proline-rich repeating units [ 25 – 27 ].…”

Section: Different Types Of Nanoantibiotics and The Promise Of Stimulmentioning

confidence: 99%

Design, challenge, and promise of stimuli-responsive nanoantibiotics

Edson

Kwon

2016

Nano Convergence

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Over the past few years, there have been calls for novel antimicrobials to combat the rise of drug-resistant bacteria. While some promising new discoveries have met this call, it is not nearly enough. The major problem is that although these new promising antimicrobials serve as a short-term solution, they lack the potential to provide a long-term solution. The conventional method of creating new antibiotics relies heavily on the discovery of an antimicrobial compound from another microbe. This paradigm of development is flawed due to the fact that microbes can easily transfer a resistant mechanism if faced with an environmental pressure. Furthermore, there has been some evidence to indicate that the environment of the microbe can provide a hint as to their virulence. Because of this, the use of materials with antimicrobial properties has been garnering interest. Nanoantibiotics, (nAbts), provide a new way to circumvent the current paradigm of antimicrobial discovery and presents a novel mechanism of attack not found in microbes yet; which may lead to a longer-term solution against drug-resistance formation. This allows for environment-specific activation and efficacy of the nAbts but may also open up and create new design methods for various applications. These nAbts provide promise, but there is still ample work to be done in their development. This review looks at possible ways of improving and optimizing nAbts by making them stimuli-responsive, then consider the challenges ahead, and industrial applications.Graphical abstractA graphic detailing how the current paradigm of antibiotic discovery can be circumvented by the use of nanoantibiotics

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Preparation, characterization, antifungal activity, and mechanism of chitosan/TiO₂ hybrid film against bipolaris maydis

Cited by 26 publications

References 37 publications

Novel chitosan-TiO₂ nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

Novel chitosan-TiO₂ nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

Chitosan/TiO2 nanocomposites: Effect of microwave heating and solution mixing techniques on physical properties

Design, challenge, and promise of stimuli-responsive nanoantibiotics

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Preparation, characterization, antifungal activity, and mechanism of chitosan/TiO2 hybrid film against bipolaris maydis

Cited by 26 publications

References 37 publications

Novel chitosan-TiO2 nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

Novel chitosan-TiO2 nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

Chitosan/TiO2 nanocomposites: Effect of microwave heating and solution mixing techniques on physical properties

Design, challenge, and promise of stimuli-responsive nanoantibiotics

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Product

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Preparation, characterization, antifungal activity, and mechanism of chitosan/TiO₂ hybrid film against bipolaris maydis

Novel chitosan-TiO₂ nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties

Novel chitosan-TiO₂ nanohybrid: Preparation, characterization, antibacterial, and photocatalytic properties