TiO2-Based Nanocomposites Thin Film Having Boosted Photocatalytic Activity for Xenobiotics Water Pollution Remediation

Photocatalytic remediation represents a potential sustainable solution to the abatement of xenobiotic pollutants released within the water environment. Aeroxide® P25 titanium dioxide nanoparticles (TiO2 NPs) are well-known as one of the most efficient photocatalysts in several applications, and have also been investigated in water remediation as suspended powder. Recently, their application in the form of thin films has been revealed as a potential alternative to avoid time-consuming filtration processes. Polymers represent suitable substrates to immobilize TiO2 NPs, allowing further production of thin films that can be exploited as a photoactive coating for environmental remediation. Nevertheless, the methods adopted to immobilize TiO2 NPs on polymer matrix involve time-consuming procedures and the use of several reactants. Here, titanium dioxide-based nanocomposites (NCx) were obtained through a new approach based on Methyl Methacrylate in situ bulk polymerization and were compared with a blended mixture (BL). Their morphology and chemical–physical properties were investigated through Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), UV–Vis, and Raman spectroscopies. It was revealed that the in situ approach deeply influences the chemical–physical interactions between the polymer matrix and TiO2 NPs. Photocatalytic experiments revealed the boosted photodegradation activity of NCx thin films, induced by the in situ approach. The photodegradation of paraquat and acetaminophen was also ascertained.

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Photocatalytic and Antibacterial Potency of Titanium Dioxide Nanoparticles: A Cost-Effective and Environmentally Friendly Media for Treatment of Air and Wastewater

Catalysts ◽

10.3390/catal11060709 ◽

2021 ◽

Vol 11 (6) ◽

pp. 709

Author(s):

Zohaib Razzaq ◽

Awais Khalid ◽

Pervaiz Ahmad ◽

Muhammad Farooq ◽

Mayeen Uddin Khandaker ◽

...

Keyword(s):

Titanium Dioxide ◽

Photoelectron Spectroscopy ◽

Environmental Remediation ◽

Titanium Dioxide Nanoparticles ◽

Environmentally Friendly ◽

Cost Effective ◽

Bromophenol Blue ◽

Bacterial Strains ◽

Tio2 Nps ◽

X Ray

Titanium dioxide nanoparticles (TiO2-NPs) were synthesized via a facile hydrothermal method. X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared (FTIR), and Raman spectroscopy were used to study the structure, morphology, chemical composition, and functional group attached to the as-synthesized TiO2-NPs. These NPs were then used to test their efficacy against various microbes and their potency as effective catalysts. TiO2-NPs are found to have the maximum antibacterial activity against Gram-negative bacterial strains rather than Gram-positive bacteria. The photocatalytic activity of the TiO2-NPs was investigated for the photodegradation of 10 ppm bromophenol blue (BPB) dye by using 0.01 g–0.05 g of catalyst. TiO2-NPs exhibited the removal of 95% BPB, respectively, within 180 min. The TiO2-NPs’ antibacterial and catalytic properties suggest that these may be used in environmental remediation as a cost-effective and environmentally friendly wastewater and air treatment material.

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Salt Stress Mitigation via the Foliar Application of Chitosan-Functionalized Selenium and Anatase Titanium Dioxide Nanoparticles in Stevia (Stevia rebaudiana Bertoni)

Molecules ◽

10.3390/molecules26134090 ◽

2021 ◽

Vol 26 (13) ◽

pp. 4090

Author(s):

Morteza Sheikhalipour ◽

Behrooz Esmaielpour ◽

Gholamreza Gohari ◽

Maryam Haghighi ◽

Hessam Jafari ◽

...

Keyword(s):

Titanium Dioxide ◽

Salt Stress ◽

Titanium Dioxide Nanoparticles ◽

Chitosan Nanoparticles ◽

Stevia Rebaudiana ◽

High Salt ◽

Steviol Glycosides ◽

Rebaudioside A ◽

Tio2 Nps ◽

Stevia Rebaudiana Bertoni

High salt levels are one of the significant and major limiting factors on crop yield and productivity. Out of the available attempts made against high salt levels, engineered nanoparticles (NPs) have been widely employed and considered as effective strategies in this regard. Of these NPs, titanium dioxide nanoparticles (TiO2 NPs) and selenium functionalized using chitosan nanoparticles (Cs–Se NPs) were applied for a quite number of plants, but their potential roles for alleviating the adverse effects of salinity on stevia remains unclear. Stevia (Stevia rebaudiana Bertoni) is one of the reputed medicinal plants due to their diterpenoid steviol glycosides (stevioside and rebaudioside A). For this reason, the current study was designed to investigate the potential of TiO2 NPs (0, 100 and 200 mg L−1) and Cs–Se NPs (0, 10 and 20 mg L−1) to alleviate salt stress (0, 50 and 100 mM NaCl) in stevia. The findings of the study revealed that salinity decreased the growth and photosynthetic traits but resulted in substantial cell damage through increasing H2O2 and MDA content, as well as electrolyte leakage (EL). However, the application of TiO2 NPs (100 mg L−1) and Cs–Se NPs (20 mg L−1) increased the growth, photosynthetic performance and activity of antioxidant enzymes, and decreased the contents of H2O2, MDA and EL under the saline conditions. In addition to the enhanced growth and physiological performance of the plant, the essential oil content was also increased with the treatments of TiO2 (100 mg L−1) and Cs–Se NPs (20 mg L−1). In addition, the tested NPs treatments increased the concentration of stevioside (in the non-saline condition and under salinity stress) and rebaudioside A (under the salinity conditions) in stevia plants. Overall, the current findings suggest that especially 100 mg L−1 TiO2 NPs and 20 mg L−1 Cs–Se could be considered as promising agents in combating high levels of salinity in the case of stevia.

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Impact of titanium dioxide nanoparticles on intestinal community in the 2,4,6-Trinitrobenzenesulfonic acid (TNBS)-induced acute colitis mice and the intervention effect of vitamin E

Nanoscale ◽

10.1039/d0nr08106j ◽

2020 ◽

Author(s):

Yanjun Gao ◽

Tingyu Li ◽

Shuming Duan ◽

Lizhi Lv ◽

Yuan Li ◽

...

Keyword(s):

Antibacterial Activity ◽

Titanium Dioxide ◽

Vitamin E ◽

Titanium Dioxide Nanoparticles ◽

Trinitrobenzenesulfonic Acid ◽

Acute Colitis ◽

Intervention Effect ◽

Tio2 Nps

Titanium dioxide nanoparticles (TiO2-NPs) is widely applicated as additives in foods for its excellent whitening and brightening capability. Although the toxicity and antibacterial activity of TiO2-NPs has been extensively studied,...

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A Coronopus didymus based eco-benign synthesis of Titanium dioxide nanoparticles (TiO2 NPs) with enhanced photocatalytic and biomedical applications

Inorganic Chemistry Communications ◽

10.1016/j.inoche.2021.109179 ◽

2021 ◽

pp. 109179

Author(s):

Khalil ur Rehman ◽

Umber Zaman ◽

Kamran Tahir ◽

Dilfaraz Khan ◽

Noor Saeed Khattak ◽

...

Keyword(s):

Titanium Dioxide ◽

Biomedical Applications ◽

Titanium Dioxide Nanoparticles ◽

Tio2 Nps ◽

Benign Synthesis

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In Situ Detoxification of Venomous Agent X Surrogate Profenofos by Doped Titanium Dioxide Nanoparticles under Illumination at the UV and Visible Ranges

The Journal of Physical Chemistry A ◽

10.1021/acs.jpca.9b07492 ◽

2019 ◽

Vol 123 (44) ◽

pp. 9456-9461 ◽

Cited By ~ 2

Author(s):

Avraham Dayan ◽

Rotem Mor Yosef ◽

Judith Risphon ◽

Eran Tuval ◽

Gideon Fleminger

Keyword(s):

Titanium Dioxide ◽

Titanium Dioxide Nanoparticles ◽

In Situ Detoxification ◽

Doped Titanium Dioxide

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Impact of Titanium Dioxide Nanoparticles on Cd Phytotoxicity and Bioaccumulation in Rice (Oryza sativa L.)

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17092979 ◽

2020 ◽

Vol 17 (9) ◽

pp. 2979 ◽

Cited By ~ 2

Author(s):

Wei Zhang ◽

Jinghua Long ◽

Jianmin Geng ◽

Jie Li ◽

Zhongyi Wei

Keyword(s):

Titanium Dioxide ◽

Oryza Sativa ◽

Plant Height ◽

Oryza Sativa L ◽

Titanium Dioxide Nanoparticles ◽

Engineered Nanoparticles ◽

Control Treatment ◽

Booting Stage ◽

Tio2 Nps ◽

The Impact

The impact of engineered nanoparticles (ENPs) on the migration and toxicity of coexisting pollutants is still unclear, especially in soil media. This study aims to evaluate the impact of titanium dioxide nanoparticles (TiO2 NPs) on the phytotoxicity of cadmium (Cd) to Oryza sativa L., and the migration of cadmium (Cd) in the soil-rice system. Three different Cd stress groups (C1 group: 1.0 mg kg−1, C2 group: 2.5 mg kg−1 and C3 group: 5.0 mg kg−1) were set in the pot experiment, and the target concentration of TiO2 NPs in each group were 0 mg kg−1 (T0), 50 mg kg−1 (T1), 100 mg kg−1 (T2) and 500 mg kg−1 (T3). Plant height and biomass decreased with the increasing of Cd content in paddy soil. TiO2 NPs could lower the phytotoxicity of Cd in terms of the changes in the morphological and biochemical characteristics, especially in the tillering and booting stage. In the tillering stage, TiO2 NPs addition caused a significant increase in plant height, biomass and the total chlorophyll content in the leaves of Oryza saliva L. In the booting stage, TiO2 NPs addition caused a 15% to 32% and 24% to 48% reduction of malondialdehyde (MDA) content for the C2 and C3 group, respectively, compared to that of the respective control treatment (T0). TiO2-NPs addition reduced the activity of peroxidase (POD) in the leaves in the booting and heading stage, and the activity of catalase (CAT) in the tillering stage. In the C1 and C2 group, the grain Cd content in the 100 and 500 mg kg−1 TiO2 NPs treatments reached 0.47–0.84 mg kg−1, obviously higher than that of the treatment without TiO2 NPs (0.27–0.32 mg kg−1), suggesting that TiO2-NPs could promote Cd migration in the soil-rice system.

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