Size-Controlled Synthesis of Pt Particles on TiO2 Surface: Physicochemical Characteristic and Photocatalytic Activity

Zielińska‐Jurek, Anna; Wei, Zhishun; Janczarek, Marcin; Wysocka, Izabela; Kowalska, Ewa

doi:10.3390/catal9110940

Cited by 22 publications

(11 citation statements)

References 34 publications

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“…Degradation of phenol under UV-visible illumination was shown to depend on Pt particle size. Optimum particle size and maximization of activity was achieved using the microemulsion method [ 139 ]. Interestingly, Pt can be deposited over anatase TiO 2 selectively over specific surface planes (like (101)), favoring specific reactions like hydrogen production [ 140 ].…”

Section: Composite Photocatalystsmentioning

confidence: 99%

Sunlight-Operated TiO2-Based Photocatalysts

et al. 2020

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Photo-catalysis is a research field with broad applications in terms of potential technological applications related to energy production and managing, environmental protection, and chemical synthesis fields. A global goal, common to all of these fields, is to generate photo-catalytic materials able to use a renewable energy source such as the sun. As most active photocatalysts such as titanium oxides are essentially UV absorbers, they need to be upgraded in order to achieve the fruitful use of the whole solar spectrum, from UV to infrared wavelengths. A lot of different strategies have been pursued to reach this goal. Here, we selected representative examples of the most successful ones. We mainly highlighted doping and composite systems as those with higher potential in this quest. For each of these two approaches, we highlight the different possibilities explored in the literature. For doping of the main photocatalysts, we consider the use of metal and non-metals oriented to modify the band gap energy as well as to create specific localized electronic states. We also described selected cases of using up-conversion doping cations. For composite systems, we described the use of binary and ternary systems. In addition to a main photo-catalyst, these systems contain low band gap, up-conversion or plasmonic semiconductors, plasmonic and non-plasmonic metals and polymers.

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Section: Composite Photocatalystsmentioning

confidence: 99%

Sunlight-Operated TiO2-Based Photocatalysts

et al. 2020

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“…The selective deposition of Pt NPs is also attributed to adsorption behavior of the metal precursors on different crystal facets. The uniform deposition of Pt on {101} facets by chemical reduction of H 2 PtCl 6 precursor (different than that for Pt(NH 3 ) 4 Cl 2 ) might be explained by the good adsorption of PtCl [92]. The selective deposition of Pt NPs on DAP results from the fact that the surface of {101} facets is electron-rich, whereas the oxidized {001} surface is electron-deficient.…”

Section: Faceted Semiconductors As Supports For Noble Metalsmentioning

confidence: 98%

“…In contrast to OAP and commercial titania samples modified with noble metals by photodeposition, it has been found that a decrease in the size of Pt NPs results in activity enhancement under both UV and vis irradiation. [92]. The selective deposition of Pt NPs on DAP results from the fact that the surface of {101} facets is electron-rich, whereas the oxidized {001} surface is electron-deficient.…”

Section: Faceted Semiconductors As Supports For Noble Metalsmentioning

confidence: 99%

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Morphology-Governed Performance of Plasmonic Photocatalysts

et al. 2020

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Plasmonic photocatalysts have been extensively studied for the past decade as a possible solution to energy crisis and environmental problems. Although various reports on plasmonic photocatalysts have been published, including synthesis methods, applications, and mechanism clarifications, the quantum yields of photochemical reactions are usually too low for commercialization. Accordingly, it has been proposed that preparation of plasmonic photocatalysts with efficient light harvesting and inhibition of charge carriers’ recombination might result in improvement of photocatalytic activity. Among various strategies, nano-architecture of plasmonic photocatalysts seems to be one of the best strategies, including the design of properties for both semiconductor and noble-metal-deposits, as well as the interactions between them. For example, faceted nanoparticles, nanotubes, aerogels, and super-nano structures of semiconductors have shown the improvement of photocatalytic activity and stability. Moreover, the selective deposition of noble metals on some parts of semiconductor nanostructures (e.g., specific facets, basal or lateral surfaces) results in an activity increase. Additionally, mono-, bi-, and ternary-metal-modifications have been proposed as the other ways of performance improvement. However, in some cases, the interactions between different noble metals might cause unwanted charge carriers’ recombination. Accordingly, this review discusses the recent strategies on the improvements of the photocatalytic performance of plasmonic photocatalysts.

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“…In the case of ZnO, the surfactants-assisted synthesis allows us to obtain a 3D hierarchical structure. Many researchers [37,38] are working on the formation of new structures of well-known oxide materials due to the appropriate exposition of the crystal facets, e.g., in titania Based on the TEM image obtained for the reference sample (TiO 2 ), it should be noted particles with a rod-like shape were observed. Moreover, the particles are characterized by a diameter of approximately 50 nm and length of 150 nm.…”

Section: Morphologymentioning

confidence: 99%

Synthesis of Titanium Dioxide via Surfactant-Assisted Microwave Method for Photocatalytic and Dye-Sensitized Solar Cells Applications

et al. 2020

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In this study, titania nanoparticles were obtained using the microwave-assisted technique. Moreover, different surfactants (PEG (Mn = 400), Pluronic P123 and Triton X−100) were used during the synthesis in order to determine their impact on the crystallinity and morphology of the final products. Subsequently, techniques such as XRD, SEM and TEM (performed in high contrast and high-resolution mode), diffuse reflectance spectroscopy (DRS), low temperature N2 sorption (BET model), FTIR and TGA were carried out. Based on the crystallinity analysis of the obtained materials, it was established that the addition of surfactants results in greater (PEG and Triton X−100) or smaller (Pluronic P123) average crystallite size. The main purpose of this study was to use the synthesized nanomaterials in the photodegradation process (in the UV light range) of the model organic pollutants – phenol (20 mg/L) and etodolac (15 mg/L). Furthermore, it was also pointed out that the dye-sensitized solar cells can be a second application for the synthesized titania nanomaterials. The photo-oxidation and photovoltaic tests have shown that the titanium dioxide obtained using the surfactant-assisted microwave method is characterized not only by better photodegradation efficiency of phenol and etodolac, but also by higher photocurrent density compared to the reference titania samples—the pristine TiO2 and commercial P25.

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Size-Controlled Synthesis of Pt Particles on TiO2 Surface: Physicochemical Characteristic and Photocatalytic Activity

Cited by 22 publications

References 34 publications

Sunlight-Operated TiO2-Based Photocatalysts

Sunlight-Operated TiO2-Based Photocatalysts

Morphology-Governed Performance of Plasmonic Photocatalysts

Synthesis of Titanium Dioxide via Surfactant-Assisted Microwave Method for Photocatalytic and Dye-Sensitized Solar Cells Applications

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