Recent developments in immobilizing titanium dioxide on supports for degradation of organic pollutants in wastewater- A review

Alhaji, Mohammed Haji; Sanaullah, Khairuddin; Khan, Afrasyab; Hamza, Abdulhamid; Adamu, Muhammad; ISHOLA, MUSTAPHA SHERIF; Rigit, Andrew Ragai Henry; Bhawani, Showkat Ahmad

doi:10.1007/s13762-017-1349-4

Cited by 44 publications

(28 citation statements)

References 117 publications

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“…Foster et al (2011) have shown that a closer contact within the TiO 2 and the organism enhances the amount of oxidative damage. On this sense, it has been demonstrated that on water suspended TiO 2 has a greater effect than TiO 2 immobilized on surfaces like thin films (Alhaji et al, 2017;Sun, Tay, & Tan, 2003). This is presumably because of extended contact between the microbial cells in suspension and the TiO 2 NPs, augmenting the surface area for ROS production.…”

Section: Introductionmentioning

confidence: 99%

Bactericidal efficacy of UV activated TiO₂ nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Ripolles‐Avila

Martinez-Garcia

Hascoët

et al. 2019

CyTA - Journal of Food

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Two different TiO 2 nanoparticles, NM101 and NM105, were evaluated against a range of Grampositive (Staphylococcus aureus, Bacillus cereus, Lactobacillus casei, Lactobacillus bulgaricus, Lactobacillus acidophilus and Lactobacillus lactis) and Gram-negative (Salmonella enterica var. Enteridis and Escherichia coli) bacteria. Both NM101 and NM105 TiO 2 nanoparticles (UV-exposed or none) had a significant antibacterial activity when the concentration of TiO 2 suspension was 100 µg mL −1. The activation of the TiO 2 NPs led, in all cases, to a shift in the growth curve, revealing lower counts as the concentration increased. E. coli was the most significantly affected pathogen by both TiO 2 nanoparticles reaching among 2-3 log CFU.mL −1 reduction. In addition, in the case of the probiotic bacteria, NM105 TiO 2 nanoparticles had similar effects as the bacterial density was reduced by 2-3 log CFU.mL −1. These results may be applied as a potent technology to be included in the formulation of new disinfectants. Eficacia bactericida de nanopartículas de TiO 2 activadas por luz UV contra bacterias Gram-positivas y Gram-negativas en suspensión RESUMEN Se evaluaron dos nanopartículas diferentes de TiO 2 , denominadas NM101 y NM105, contra una batería de bacterias Gram-positivas (Staphylococcus aureus, Bacillus cereus, Lactobacillus casei, Lactobacillus bulgaricus, Lactobacillus acidophilus and Lactobacillus lactis) y Gram-negativas (Salmonella enterica var. Enteridis and Escherichia coli). Ambas nanopartículas de TiO 2 , NM101 y NM105 (expuestas o no a luz UV) tuvieron una actividad antibacteriana significativa cuando la concentración de suspensión de TiO 2 alcanzó los 100 µg mL −1. La activación de las nanopartículas de TiO 2 condujo, en todos los casos, a un desplazamiento en la curva de crecimiento microbiano, revelando recuentos más bajos a medida que concentración de TiO 2 aumentaba. E. coli fue el patógeno más afectado, alcanzando entre 2-3 log UFC.mL −1 de reducción. Además, en el caso de las bacterias probióticas, las nanopartículas NM105 TiO 2 tuvieron efectos similares, ya que la densidad bacteriana se redujo en 2-3 log UFC.mL −1. Estos resultados podrían aplicarse como una potente tecnología a incluir en la formulación de nuevos desinfectantes ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Bactericidal efficacy of UV activated TiO₂ nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Ripolles‐Avila

Martinez-Garcia

Hascoët

et al. 2019

CyTA - Journal of Food

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“…Immobilizing TiO 2 nanoparticles on macro carriers provides a simple way to separate the photocatalyst from the solution, preventing the harmful effects of nanoparticles from entering the environment. Various carrier materials have been reported to immobilize TiO 2 nanoparticles, including glass, metals, ceramics, polymers, and other porous carriers [5][6][7][8][9]. Nevertheless, choosing the best carrier is not an easy task.…”

Section: Introductionmentioning

confidence: 99%

Polymer-based TiO₂ nanocomposite membrane: synthesis and organic pollutant removal

Wang

et al. 2021

International Journal of Smart and Nano Materials

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Titanium dioxide (TiO 2 ) nanoparticles are efficient photocatalysis for treating organic pollutants in water. Immobilizing TiO 2 nanoparticles not only enables the reuse of nanoparticles but also prevents the harmful impact of releasing nanoparticles into the aquatic environment. In this study, a porous composite microfiber membrane based on polyacrylonitrile (PAN) with TiO 2 nanoparticles has been synthesized by electrospinning technique. The new membrane system has exhibited excellent adsorptive-photocatalytic property to degrade Methylene blue (MB). Using the nonlinear form of the pseudo-firstorder, pseudo-second-order, Elovich, and Intra-particle diffusion models, the adsorption mechanism was analyzed. Coupling with adsorption and photocatalysis, the efficiency of this membrane system was illustrated via the multistage linear form of the pseudo-firstorder kinetic; and the electrical energy per order (EEO) confirmed the lowest energy requirements to transfer selected pollutants. Combining the results of SEM, BET, FTIR, XRD and TGA, it revealed the relationship of microstructure, composition, and MB decomposition performance. The finding presents new knowledge for material design and evaluation of polymers/oxides membrane systems for remediating organic pollutants in water.

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“…Among them, post separation for the recovery of the very fine particles of the photocatalyst and the feasibility of reuse of the recovered catalyst are considered the most prominent challenges since they render the whole process unprofitable. To overcome this drawback, the immobilization of the TiO 2 catalyst on different polymer-supporting materials has been recently proposed [33][34][35]. In the latter case, immobilization of TiO 2 on a membrane or a film demonstrates the advantage of acting also as a barrier for contaminants and their degradation products, thus improving the efficiency of the process.…”

Section: Introductionmentioning

confidence: 99%

Development of Novel Polymer Supported Nanocomposite GO/TiO2 Films, Based on poly(L-lactic acid) for Photocatalytic Applications

Malesic-Eleftheriadou

Ofrydopoulou

Papageorgiou

et al. 2020

Applied Sciences

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In the present study the development of novel polymer-supported nanocomposite graphene oxide (GO)–TiO2 films, based on poly(L-lactic acid), one of the most exploited bioplastics worldwide, was explored for photocatalytic applications. The nanocomposites were synthesized and evaluated as photocatalysts for the removal of a mixture of nine antibiotics, consisting of two sulphonamides (sulfamethoxazole, sulfadiazine), three fluoroquinolones (levofloxacin, norfloxacin, moxifloxacin), one anti-TB agent (isoniazid), one nitroimidazole (metronidazole), one lincosamide (lincomycin) and one diaminopyrimidine (trimethoprim), which are commonly found in wastewaters. The films were synthesized using 1 wt% GO and different TiO2 content (10, 25, and 50 wt%) and characterized using Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Findings confirmed the successful immobilization of GO/TiO2 in all cases. The PLLA–GO–TiO2 50 wt% composite film demonstrated higher photocatalytic efficiency and, thus, was further investigated demonstrating excellent photostability and reusability even after four cycles. Overall, PLLA–GO–TiO2 50 wt% nanocomposite demonstrated high efficiency in the photocatalytic degradation of the antibiotics in various matrices including pure water and wastewater.

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Recent developments in immobilizing titanium dioxide on supports for degradation of organic pollutants in wastewater- A review

Cited by 44 publications

References 117 publications

Bactericidal efficacy of UV activated TiO₂ nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Bactericidal efficacy of UV activated TiO₂ nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Polymer-based TiO₂ nanocomposite membrane: synthesis and organic pollutant removal

Development of Novel Polymer Supported Nanocomposite GO/TiO2 Films, Based on poly(L-lactic acid) for Photocatalytic Applications

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Recent developments in immobilizing titanium dioxide on supports for degradation of organic pollutants in wastewater- A review

Cited by 44 publications

References 117 publications

Bactericidal efficacy of UV activated TiO2 nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Bactericidal efficacy of UV activated TiO2 nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Polymer-based TiO2 nanocomposite membrane: synthesis and organic pollutant removal

Development of Novel Polymer Supported Nanocomposite GO/TiO2 Films, Based on poly(L-lactic acid) for Photocatalytic Applications

Contact Info

Product

Resources

About

Bactericidal efficacy of UV activated TiO₂ nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Bactericidal efficacy of UV activated TiO₂ nanoparticles against Gram-positive and Gram-negative bacteria on suspension

Polymer-based TiO₂ nanocomposite membrane: synthesis and organic pollutant removal