Effect of TiO2 nanoparticle loading by sol–gel method on the gas-phase photocatalytic activity of CuxO–TiO2 nanocomposite

Ansari, Fahimeh; Sheibani, S.; Caudillo-Flores, Uriel; Fernández, M.

doi:10.1007/s10971-020-05388-8

Cited by 9 publications

(6 citation statements)

References 66 publications

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“…TiO 2 is a key material in photocatalytic applications owing to its thermal and chemical stability, nontoxicity, cost-effectiveness, and availability [ 5 , 6 , 7 ]. The anatase phase of TiO 2 exhibits higher photocatalytic activity than the rutile and brookite phases.…”

Section: Introductionmentioning

confidence: 99%

“…The anatase phase of TiO 2 exhibits higher photocatalytic activity than the rutile and brookite phases. However, it still has some disadvantages because of its wide bandgap (3.2 eV), which suppresses the photoactivity owing to rapid electron–hole recombination [ 3 , 5 , 8 ] and limits light absorption primarily to the ultraviolet (UV) region [ 8 ], which constitutes only 5% of the solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

“…Various transition metal oxide semiconductors such as WO 3 , ZnO, SiO 2 , Fe 2 O 3 , and CuO [ 2 , 9 ] have been incorporated into TiO 2 to enhance its activity. In this regard, economical, environmentally safe, abundant, and highly active copper oxides (Cu 2+ and Cu 1+ ) are suitable for synergistic integration with TiO 2 [ 5 , 7 , 10 ]. TiO 2 (an n-type semiconductor) and CuO (a p-type semiconductor) form a p–n heterojunction, which is considered to increase the photocatalytic efficiency [ 6 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…CuO provides a favorable bandgap energy range of 1.2–2.2 eV, which expands light absorption to the visible spectrum [ 5 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Coupling TiO 2 with a lower-bandgap semiconductor can prolong its electron–hole separation lifetime by suppressing electron–hole recombination [ 5 , 6 ]. This prolonged separation facilitates the generation of hydroxyl radicals and is therefore critical to photodegradation.…”

Section: Introductionmentioning

confidence: 99%

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Gas-Phase Fabrication and Photocatalytic Activity of TiO2 and TiO2–CuO Nanoparticulate Thin Films

Hudandini,

Kusdianto,

Kubo

et al. 2024

Materials

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CuO-loaded TiO2 nanomaterials have applications in pollutant degradation via photocatalysis. However, the existing methods of fabricating these nanomaterials involve liquid-phase processes, which require several steps and typically generate liquid waste. In this study, TiO2 and TiO2–CuO nanoparticulate thin films were successfully fabricated through a one-step gas-phase approach involving a combination of plasma-enhanced chemical vapor deposition and physical vapor deposition. The resulting films consisted of small, spherical TiO2 nanoparticles with observable CuO on the TiO2 surface. Upon annealing in air, the TiO2 nanoparticles were crystallized, and CuO was completely oxidized. The photocatalytic activity of TiO2–CuO/H2O2, when introduced into the rhodamine 6G degradation system, was substantially enhanced under both ultraviolet and visible light irradiation. Moreover, this study highlights the influence of pH on the photocatalytic activity; TiO2–CuO/H2O2 exhibited the highest photocatalytic activity at pH 13, with a reaction rate constant of 0.99 h−1 cm−2 after 180 min of visible light irradiation. These findings could facilitate the development of nanoparticulate thin films for enhanced pollutant degradation in wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…CuO provides a favorable bandgap energy range of 1.2–2.2 eV, which expands light absorption to the visible spectrum [ 5 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gas-Phase Fabrication and Photocatalytic Activity of TiO2 and TiO2–CuO Nanoparticulate Thin Films

Hudandini,

Kusdianto,

Kubo

et al. 2024

Materials

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Photoreforming Light Alcohols for Value‐Added Resources: A Mini Review

Liu,

Yin,

Guo

et al. 2024

Energy Tech

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Hydrogen gas as a clean energy source, it is a promising alternative to fossil fuels. Therefore, people are actively seeking effective ways to produce hydrogen to cope with the imminent global energy shortage. However, the current production of hydrogen relies on the catalytic reforming of fossil fuels, inducing inevitable environmental pollution. Alternatively, photocatalysis for produce hydrogen gas from reforming alcohols is a promising approach. Especially, other value‐added hydrocarbon products, such as acetone, acetaldehyde, acetic acid, etc., can also be produced during the photoreforming process of alcohols. Meanwhile, reducing the production of COx, making it an environmentally friendly conversion process. Outstandingly, TiO2 and its derivative are excellent photocatalysts. Among them, TiO2 cocatalyzed with noble metal can easily increase the H2 evolution rate to the mmol g−1 h−1 scale. Among the light alcohols isopropyl alcohol has fewer side reactions, methanol and ethanol have higher reaction rate, but they require to reduce the by‐product COx. In this review, the recent developments in this field are summarized; various studies regarding H2 evolution rate, illumination condition, quantum efficiency, etc., are compared; and the development prospects of this field, with the hope of sparking widespread research interest, are proposed.

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Removal of organic dyes and free radical assay by encapsulating polyvinylpyrrolidone and Tinospora Cordifolia in dual (Co–Cu) doped TiO2 nanoparticles

Thakur

2023

Environmental Pollution

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Effect of TiO2 nanoparticle loading by sol–gel method on the gas-phase photocatalytic activity of CuxO–TiO2 nanocomposite

Cited by 9 publications

References 66 publications

Gas-Phase Fabrication and Photocatalytic Activity of TiO2 and TiO2–CuO Nanoparticulate Thin Films

Gas-Phase Fabrication and Photocatalytic Activity of TiO2 and TiO2–CuO Nanoparticulate Thin Films

Photoreforming Light Alcohols for Value‐Added Resources: A Mini Review

Removal of organic dyes and free radical assay by encapsulating polyvinylpyrrolidone and Tinospora Cordifolia in dual (Co–Cu) doped TiO2 nanoparticles

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