TiO2 quantum dots: Energy consumption cost,germination, and phytotoxicity studies, recycling photo and solar catalytic processes of reactive yellow 145 dye and natural industrial wastewater

Mohamed, Walied A.A.; El‐Gawad, Hala H. Abd; Handal, Hala T.; Galal, Hoda R.; Mousa, Hanan A.; El-Sayed, B. A.; Labib, Ammar A.; Abdel‐Mottaleb, M. S. A.

doi:10.1016/j.apt.2022.103923

Cited by 14 publications

(1 citation statement)

References 76 publications

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“…In Figure a, the TiO 2 QDs and TiO 2 OVs powders have powerful absorption, respectively, in the UV and visible ranges. In the TiO 2 QDs, compared to the commercial TiO 2 , due to having smaller particles and electron confinement, a shift toward shorter wavelengths has occurred. , This shift leads to an increase in the energy gap and the redox power of electrons and holes presented in the energy bands . Deficiency of oxygen and the high concentration of Ti 3+ in the TiO 2 OVs powder has led to a decrease in the band gap and an improvement in the absorption of visible light .…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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Distinguishable Recycling and Photodegradation Processes of Real Industrial Effluents and Blue Dianix Dye in the Presence of Different TQDs Size

Mohamed,

Saad,

Mohamed

et al. 2023

J Clust Sci

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Three titanium dioxide quantum dots (TQDs) samples were successfully synthesized at low calcination temperatures via a modified precipitation method at T1 = 330, T2 = 360, and T3 = 400 °C. The synthesized TQDs samples were characterized by: XRD, FE-SEM, HRTEM, and EDX to analyze the crystallinity, purity, and existence of asymmetric circle forms for the TQDs catalysts. Also, the surface area, band gap energy, and crystallite size at different calcination temperatures are 322.32 m2/g, 3.20 eV, and 4.9 nm at 300 °C, 292.39 m2/g, 3.14 eV, and 5.4 nm at 360 °C, and 254.66 m2/g, 3.07 eV, and 6.2 nm at 400 °C, respectively. A xenon photoreactor (70 W/cm2) was used to evaluate the photodegradation process of Blue Dianix dye and sunlight for real industrial effluent treatment. The photocatalytic activity decreases as the crystallite size increases in the TQD samples. Photocatalytic activity of TQDs due to their distinguishable crystalline domain size of less than 10 nm and their high surface area. The photodegradation rate of real industrial effluents was evaluated according to the COD limits permitted by Egyptian environmental law. Also, TOC and COD analyses evaluated 12 recycled samples of TQDs.

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Photophysical properties, antimicrobial activity, energy consumption and financial cost of recycling of TiO2 quantum dots via photomineralization processes of Vat Green dye and industrial dyeing effluents

Mohamed,

Abd El-Gawad,

Mousa

et al. 2024

Ceramics International

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TiO2 quantum dots: Energy consumption cost,germination, and phytotoxicity studies, recycling photo and solar catalytic processes of reactive yellow 145 dye and natural industrial wastewater

Cited by 14 publications

References 76 publications

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

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

Distinguishable Recycling and Photodegradation Processes of Real Industrial Effluents and Blue Dianix Dye in the Presence of Different TQDs Size

Photophysical properties, antimicrobial activity, energy consumption and financial cost of recycling of TiO2 quantum dots via photomineralization processes of Vat Green dye and industrial dyeing effluents

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TiO2 quantum dots: Energy consumption cost,germination, and phytotoxicity studies, recycling photo and solar catalytic processes of reactive yellow 145 dye and natural industrial wastewater

Cited by 14 publications

References 76 publications

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

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

Distinguishable Recycling and Photodegradation Processes of Real Industrial Effluents and Blue Dianix Dye in the Presence of Different TQDs Size

Photophysical properties, antimicrobial activity, energy consumption and financial cost of recycling of TiO2 quantum dots via photomineralization processes of Vat Green dye and industrial dyeing effluents

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Product

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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

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