A critical review on the recent trends of photocatalytic, antibacterial, antioxidant and nanohybrid applications of anatase and rutile TiO2 nanoparticles

Thakur, Naveen; Thakur, Nikesh; Kumar, Anil; Thakur, Vijay Kumar; Kalia, Susheel; Arya, Vedpriya; Kumar, Ashwani; Kumar, Sunil; Kyzas, George Z.

doi:10.1016/j.scitotenv.2023.169815

Cited by 36 publications

(10 citation statements)

References 318 publications

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“…These criteria could be fulfilled by several metal oxides and perovskite-type metal oxides, including TiO 2 , ZnO, CeO 2 , Mn 3 O 4 , SrTiO 3 , BiVO 4 , and Bi 2 WO 6 nanoparticles. Supplementing to this, metal oxides, such as TiO 2 and ZnO nanoparticles, not only show good photoactivity in the removal of pharmaceuticals, pesticides, and organic dyes, but they can also exhibit antibacterial, antioxidant, and self-cleaning properties due to their morphology, structure, capacity to scavenge free radicals, inhibition of toxic by-products, and hydrophilicity [91,92]. These multifunctional properties give this photocatalytic material potential for the future of nanotechnology, biomedical applications, coatings, and window glass applications.…”

Section: Photocatalysismentioning

confidence: 99%

Recent Advances in Advanced Oxidation Processes for Degrading Pharmaceuticals in Wastewater—A Review

Roslan,

Lau,

Suhaimi

et al. 2024

Catalysts

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A large variety of pharmaceutical compounds have recently been detected in wastewater and natural water systems. This review highlighted the significance of removing pharmaceutical compounds, which are considered indispensable emerging contaminants, from wastewater and natural water systems. Various advanced oxidation processes (AOPs), including UV-H2O2, Fenton and photo-Fenton, ozone-based processes, photocatalysis, and physical processes, such as sonolysis, microwave, and electron beam irradiation, which are regarded as the most viable methods to eliminate different categories of pharmaceutical compounds, are discussed. All these AOPs exhibit great promising techniques, and the catalytic degradation process of the emerging contaminants, advantages, and disadvantages of each technique were deliberated. Heterogeneous photocatalysis employing metal oxides, particularly anatase TiO2 nanoparticles as catalysts activated by UV light irradiation, was reviewed in terms of the electron–hole separation, migration of the charge carriers to the catalyst surfaces, and redox potential of the charge carriers. This brief overview also emphasized that anatase TiO2 nanoparticles and TiO2-based nanomaterials are promising photocatalysts, and a combination of photocatalysis and other AOPs enhanced photocatalytic degradation efficiency. Finally, the challenges of applying anatase TiO2-based photocatalysis in environmental remediation and wastewater treatments to degrade pharmaceutical compounds, including mass spectroscopic analysis and a biological activity test of by-products of the emerging contaminants resulting from photocatalysis, are summarized.

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Section: Photocatalysismentioning

confidence: 99%

Recent Advances in Advanced Oxidation Processes for Degrading Pharmaceuticals in Wastewater—A Review

Roslan,

Lau,

Suhaimi

et al. 2024

Catalysts

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“…Therefore, researchers are looking for ways to promote the efficiency of this semiconductor in the visible region because almost 5% of solar energy is UV rays. The most satisfactory methods to improve the properties of TiO 2 are structural defect engineering, particle size control, and combination with other semiconductors . Reducing the particle size below 10 nm (quantum dots, QDs), which is associated with an increase in the number of surface atoms, leads to an enhancement in reactivity, acceleration in the charge-transfer process, and an increase in the specific surface area .…”

Section: Introductionmentioning

confidence: 99%

“…The most satisfactory methods to improve the properties of TiO 2 are structural defect engineering, 9 particle size control, 10 and combination with other semiconductors. 11 Reducing the particle size below 10 nm (quantum dots, QDs), which is associated with an increase in the number of surface atoms, leads to an enhancement in reactivity, acceleration in the charge-transfer process, and an increase in the specific surface area. 12 Besides, the most efficient method for manipulating the energy gap of TiO 2 is the synthesis of colored TiO 2 , which is created from the combination of Ti 3+ ions and oxygen vacancies (OVs) in the crystalline structure, leading to the promotion of visible-light absorption.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Cu₅FeS₄ QDs with Abundant Oxygen Vacancy TiO₂ QDs/TiO₂ OVs: Double S-Scheme Photocatalysts for Effectual N₂ Conversion to NH₃ under Simulated Solar Light

Pournemati,

Habibi-Yangjeh,

Khataee

2024

Inorg. Chem.

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Photocatalytic N 2 conversion to NH 3 is a green, sustainable pathway with renewable energy sources and carbon neutrality. In this research, ternary TiO 2 QDs/TiO 2 OVs/Cu 5 FeS 4 nanocomposites were prepared by an easy and affordable procedure and utilized to produce clean ammonia energy without a sacrificial agent. The amount of produced green ammonia by the optimum nanocomposite achieved was 17,274 μmol L −1 g −1 , which was approximately 20.9, 6.48, 4.45, 2.26, and 1.45 times higher than those of commercial TiO 2 , TiO 2 QDs, TiO 2 OVs, Cu 5 FeS 4 , and TiO 2 QDs/TiO 2 OVs photocatalysts, respectively. Lattice compatibility through the developed homojunction within TiO 2 QDs/TiO 2 OVs and the integration of Cu 5 FeS 4 nanoparticles led to the establishment of a double S-scheme homo/heterojunction system, which improved the photocatalytic activity by maintaining electrons and holes with high oxidation and reduction power and greatly reduced the recombination of charges, which led to the acceleration of charge transfer and migration. Besides, the promoted surface area compared to the pure components, introducing oxygen vacancies, and reducing the particle size boosted the photocatalytic N 2 conversion to NH 3 . The results of this research are a basis for the rational design of homojunction/heterojunction visible-light-responsive systems for photocatalytic nitrogen fixation reactions.

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“…However, these existing techniques encounter challenges in completely removing non-biodegradable pollutants due to constraints such as high chemical and energy consumption, prolonged reaction time, high operating costs, sludge generation and toxic gas release [22,23]. Therefore, semiconductor-based photocatalysts have drawn significant attention for wastewater remediation due to their capability to efficiently remove pollutants, transforming them into harmless by-products under light irradiation [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

“…Titanium dioxide (TiO2) is a promising material for semiconductor-based photocatalysts due to its excellent optical properties, affordability, high photocatalytic activity, chemical stability, and non-toxicity [25][26][27]. TiO2 has several polymorphs, including brookite, anatase, and rutile, with rutile being the most stable in the crystal phase [25,28,29].…”

Section: Introductionmentioning

confidence: 99%

Designing A Visible Light Driven TiO2-Based Photocatalyst by Doping and Co-Doping with Niobium (Nb) and Boron (B)

Yeoh,

Chan,

Pung

et al. 2024

Bull. Chem. React. Eng. Catal.

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Water pollution has emerged as a significant worldwide issue, with organic pollutants being a key contributor. Titanium dioxide (TiO2) has demonstrated promising photocatalytic performance in removing organic pollutants under ultraviolet (UV) irradiation. However, the wide band gap (3.2 eV) of TiO2 results in low absorption capacity of visible light, hindering its overall efficiency in degrading organic pollutants. To address the limitation, this research aimed to synthesize visible light-driven TiO2 photocatalyst with different polymorphs (anatase and rutile) and investigate the effect of various doping combination (Nb, B and Nb,B) and concentrations (0.25, 0.50, 0.75 and 1.00 mol%) on the photodegradation efficiency towards methylene blue (MB) dye solution. Anatase phase was obtained when TiO2-based nanopowders were calcined at 400 °C, while the rutile phase was formed at 900 °C based on XRD analyses. Additionally, the morphology analyses revealed that the particle size of anatase is much smaller than that of rutile. The presence of dopants further reduced the particle size of both anatase and rutile phases. Based on UV-Vis absorbance spectra analyses, the anatase Nb,B-TiO2 with 0.50 mol% of dopant concentration exhibited the best photocatalytic performance towards MB. Moreover, the anatse phase of 0.50 mol% Nb,B-TiO2 showed the narrowest band gap of 2.74 eV compared to the TiO2 (3.4 eV), representing a reduction of 19.41 %, according to UV-Vis analyses. These outcomes suggest the potential application of anatase phase of 0.50 mol% Nb,B-TiO2 in treating organic pollutants in wastewater under visible light conditions in future. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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A critical review on the recent trends of photocatalytic, antibacterial, antioxidant and nanohybrid applications of anatase and rutile TiO2 nanoparticles

Cited by 36 publications

References 318 publications

Recent Advances in Advanced Oxidation Processes for Degrading Pharmaceuticals in Wastewater—A Review

Recent Advances in Advanced Oxidation Processes for Degrading Pharmaceuticals in Wastewater—A Review

Incorporation of Cu₅FeS₄ QDs with Abundant Oxygen Vacancy TiO₂ QDs/TiO₂ OVs: Double S-Scheme Photocatalysts for Effectual N₂ Conversion to NH₃ under Simulated Solar Light

Designing A Visible Light Driven TiO2-Based Photocatalyst by Doping and Co-Doping with Niobium (Nb) and Boron (B)

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A critical review on the recent trends of photocatalytic, antibacterial, antioxidant and nanohybrid applications of anatase and rutile TiO2 nanoparticles

Cited by 36 publications

References 318 publications

Recent Advances in Advanced Oxidation Processes for Degrading Pharmaceuticals in Wastewater—A Review

Recent Advances in Advanced Oxidation Processes for Degrading Pharmaceuticals in Wastewater—A Review

Incorporation of Cu5FeS4 QDs with Abundant Oxygen Vacancy TiO2 QDs/TiO2 OVs: Double S-Scheme Photocatalysts for Effectual N2 Conversion to NH3 under Simulated Solar Light

Designing A Visible Light Driven TiO2-Based Photocatalyst by Doping and Co-Doping with Niobium (Nb) and Boron (B)

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Incorporation of Cu₅FeS₄ QDs with Abundant Oxygen Vacancy TiO₂ QDs/TiO₂ OVs: Double S-Scheme Photocatalysts for Effectual N₂ Conversion to NH₃ under Simulated Solar Light