Visible-light-responsive surface-modified TiO2 powder with 4-chlorophenol: A combined experimental and DFT study

Barbieriková, Zuzana; Dvoranová, Dana; Brezová, Vlasta; Džunuzović, Enis S.; Sredojević, Dušan N.; Lazić, Vesna; Nedeljković, Jovan M.

doi:10.1016/j.optmat.2019.01.027

Cited by 23 publications

(12 citation statements)

References 45 publications

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“…After loading with Pt, these nanosheets demonstrated a quantum efficiency of 34% in hydrogen production, a rather high value. Introduction of oxygen vacancies (Vo) into the TiO 2 support improved the reductive properties of deposited Pd nanoparticles [51]. V O were introduced into TiO 2 via calcination at 800 • C in Ar flow.…”

Section: Metal-loaded Tio 2 Surfacesmentioning

confidence: 99%

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

et al. 2020

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Surface chemistry plays a major role in photocatalytic and photoelectrochemical processes taking place with the participation of TiO2. The synthesis methods, surface characterizations, theoretical research methods, and hardware over the last decade generated opportunities for progress in the surface science of this photocatalyst. Very recently, attention was paid to the design of photocatalysts at the nanoscale level by adjusting the types of exposed surfaces and their ratio, the composition and the surface structure of nanoparticles, and that of individual surfaces. The current theoretical methods provide highly detailed designs that can be embodied experimentally. The present review article describes the progress in the surface science of TiO2 and TiO2-based photocatalysts obtained over the last three years. Such aspects including the properties of macro- and nano-scale surfaces, noble-metal-loaded surfaces, doping with Mg and S, intrinsic defects (oxygen vacancies), adsorption, and photoreactions are considered. The main focus of the article is on the anatase phase of TiO2.

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Section: Metal-loaded Tio 2 Surfacesmentioning

confidence: 99%

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

et al. 2020

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“…Catechol complexation shifts the absorption onset of TiO 2 up to over 600 nm (Figure 6b). The presence of substituents on the catechol ring can enhance the visible light absorption and the photochemical response of the complexes; electron-donating or electron-withdrawing groups are reported to have different effects on the charge separation lifetime and photocatalytic efficiency of the sensitized system [106][107][108][109]. For example, electron-withdrawing substituents, such as cyanoor sulfonic groups, fostered H 2 production on Pt/TiO 2 [109].…”

Section: Lmct-sensitized Tiomentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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Solar radiation is becoming increasingly appreciated because of its influence on living matter and the feasibility of its application for a variety of purposes. It is an available and everlasting natural source of energy, rapidly gaining ground as a supplement and alternative to the nonrenewable energy feedstock. Actually, an increasing interest is involved in the development of efficient materials as the core of photocatalytic and photothermal processes, allowing solar energy harvesting and conversion for many technological applications, including hydrogen production, CO2 reduction, pollutants degradation, as well as organic syntheses. Particularly, photosensitive nanostructured hybrid materials synthesized coupling inorganic semiconductors with organic compounds, and polymers or carbon-based materials are attracting ever-growing research attention since their peculiar properties overcome several limitations of photocatalytic semiconductors through different approaches, including dye or charge transfer complex sensitization and heterostructures formation. The aim of this review was to describe the most promising recent advances in the field of hybrid nanostructured materials for sunlight capture and solar energy exploitation by photocatalytic processes. Beside diverse materials based on metal oxide semiconductors, emerging photoactive systems, such as metal-organic frameworks (MOFs) and hybrid perovskites, were discussed. Finally, future research opportunities and challenges associated with the design and development of highly efficient and cost-effective photosensitive nanomaterials for technological claims were outlined.

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“…The assignment of PC4-C is uncertain. Similar axially symmetric species have been observed by Barbierikováet al (g ⊥ = 2.013, g || = 2.003) in UV-exposed TiO 2 /chlorophenol nanocomposite 3 and Pb 2+ /cysteine-modified TiO 2 g-factors of 2.022 and 2.004) in cysteine-modified TiO 2 . 29 They were assigned to trapped holes on oxygen centers (O − species) or carboxylate radicals, respectively.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Titanium dioxide (TiO 2 ) is the most studied photocatalyst due to its efficient photoactivity, chemical stability and relatively low cost. − Interest in heterogeneous photocatalysis employing TiO 2 has grown considerably because of its potential for a wide variety of applications in environmental science and energy conversion. − To improve its efficiency and photoactivity properties, TiO 2 has been used in the form of mesoporous solids and in a nanotube form, as well as a pure material and as a hybrid with carbon nanotubes . Also, a series of photocatalytic TiO 2 -based nanocomposites have been studied.…”

Section: Introductionmentioning

confidence: 99%

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Photoinduced Paramagnetic Centers in Nanocomposites Formed by Titanium Dioxide and Myristic Acid

et al. 2021

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An electron paramagnetic resonance (EPR) study has been carried out on the hybrid layered nanocomposite formed by TiO2 and myristic acid. The samples were characterized by means of X-ray diffraction (XRD), thermogravimetric analysis, solid-state NMR, scanning electron microscopy (SEM), spectral absorbance (UV–vis), and Raman and infrared spectroscopy (FTIR). X-band continuous wave (CW)-EPR was used to investigate the photoinduced paramagnetic species generated in the nanocomposite by UV irradiation at 365 nm in vacuum and in ambient atmosphere and characterized spectroscopically at 90 K. Various paramagnetic species were identified and characterized by their Hamiltonian parameters. They include disordered isolated Ti3+ centers, dimeric units producing S = 1 triplet species, and superoxide radicals, (ROO•), whose concentrations were monitored as a function of temperature and annealing times during the course of well-defined temperature cycling protocols.

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Visible-light-responsive surface-modified TiO2 powder with 4-chlorophenol: A combined experimental and DFT study

Cited by 23 publications

References 45 publications

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

Photoinduced Paramagnetic Centers in Nanocomposites Formed by Titanium Dioxide and Myristic Acid

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