Oxidative C-H/C-H Coupling of Dipyrromethanes with Azines by TiO2-Based Photocatalytic System. Synthesis of New BODIPY Dyes and Their Photophysical and Electrochemical Properties

Trestsova, Maria A.; Utepova, Irina A.; Чупахин, О. Н.; Semenov, Maksim V.; Pevtsov, D. N.; Nikolenko, L. M.; Товстун, С. А.; Gadomska, A. V.; Shchepochkin, Alexander V.; Кim, Grigory А.; Разумов, В. Ф.; Дорошева, И. Б.; Rempel, А. А.

doi:10.3390/molecules26185549

Cited by 5 publications

(4 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poly (titanium dioxide) is found to have a significant influence on the component compatibility and relaxation behavior of interpenetrating polymer networks [ 15 ]. TiO 2 photocatalysts treated at 800 °C in hydrogen atmosphere for 1 h showed higher visible photocatalytic activity for C-H/C-H coupling of dipyrromethanes with azines than commercial TiO 2 (P25) [ 16 ]. TiO 2 nanosheets were proved to exhibit superior photocatalytic activity for CO 2 reduction than the nanoparticle, thanks to its much higher surface area and surface activity [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Liao

Wang

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Titanium dioxide (TiO2) nanomaterials have been widely used in photocatalytic energy conversion and environmental remediation due to their advantages of low cost, chemical stability, and relatively high photo-activity. However, applications of TiO2 have been restricted in the ultraviolet range because of the wide band gap. Broadening the light absorption of TiO2 nanomaterials is an efficient way to improve the photocatalytic activity. Thus, black TiO2 with extended light response range in the visible light and even near infrared light has been extensively exploited as efficient photocatalysts in the last decade. This review represents an attempt to conclude the recent developments in black TiO2 nanomaterials synthesized by modified treatment, which presented different structure, morphological features, reduced band gap, and enhanced solar energy harvesting efficiency. Special emphasis has been given to the newly developed synthetic methods, porous black TiO2, and the approaches for further improving the photocatalytic activity of black TiO2. Various black TiO2, doped black TiO2, metal-loaded black TiO2 and black TiO2 heterojunction photocatalysts, and their photocatalytic applications and mechanisms in the field of energy and environment are summarized in this review, to provide useful insights and new ideas in the related field.

show abstract

Section: Introductionmentioning

confidence: 99%

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Liao

Wang

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Each form has different properties and applications. Titanium dioxide also exhibits high photocatalytic activity [ 9 , 10 , 11 ], which is associated with the generation of reactive oxygen species that may adversely affect the skin, accelerating the aging process [ 12 , 13 ]. Moreover, it is difficult to disperse TiO 2 while preparing the formulations.…”

Section: Introductionmentioning

confidence: 99%

Improving the Dispersibility of TiO2 in the Colloidal System Using Trifunctional Spherosilicates

et al. 2023

View full text Add to dashboard Cite

Titanium dioxide is a commonly used ingredient in cosmetics acting as a thickening agent and inorganic UV filter. However, TiO2 is difficult to disperse, which causes problems in spreading the formulations. The solution to this problem is to modify the titanium dioxide surface to change its properties by creation of the new type of hybrid inorganic–organic UV filter. Therefore, this study aimed to functionalize titanium dioxide with organosilicon compounds and determine how this modification will affect the dispersibility of TiO2 in the colloidal system and the stability of emulsions. First, the functionalized octaspherosilicates were obtained and characterized. Next, the synthesized compounds were applied as modifiers for titanium dioxide and were analyzed by FT-IR, UV-Vis, and laser diffraction. Furthermore, the hydrophilic–hydrophobic character was assessed by measuring the contact angle. The new materials were introduced into emulsions and the formulations were analyzed in terms of particle size distribution and stability by multiple light scattering. It was found that the modification of titanium dioxide with spherosilicates significantly improved both the stability of emulsion and the dispersibility of novel materials in the colloidal system compared to nonmodified TiO2. The covalent binding of the modifier with the titanium dioxide had an impact on the stability of the emulsion.

show abstract

“…One of the major drawbacks of TiO 2 is its wide band gap, ≈3.1-3.2 eV, which requires UV light for activation. Therefore, efforts have been made to develop visible light-active photocatalysts by modifying TiO 2 or using other types of semiconductor materials [8][9][10][11][12][13][14][15][16]. Noble metals, such as Ag and Au, are commonly used to enhance the photocatalytic performance of TiO 2 , as they act as an electron sink.…”

Section: Introductionmentioning

confidence: 99%

Performance of TiO2-Based Tubular Membranes in the Photocatalytic Degradation of Organic Compounds

et al. 2023

View full text Add to dashboard Cite

This work presents the photocatalytic degradation of organic pollutants in water with TiO2 and TiO2/Ag membranes prepared by immobilising photocatalysts on ceramic porous tubular supports. The permeation capacity of TiO2 and TiO2/Ag membranes was checked before the photocatalytic application, showing high water fluxes (≈758 and 690 L m−2 h−1 bar−1, respectively) and <2% rejection against the model pollutants sodium dodecylbenzene sulfonate (DBS) and dichloroacetic acid (DCA). When the membranes were submerged in the aqueous solutions and irradiated with UV-A LEDs, the photocatalytic performance factors for the degradation of DCA were similar to those obtained with suspended TiO2 particles (1.1-fold and 1.2-fold increase, respectively). However, when the aqueous solution permeated through the pores of the photocatalytic membrane, the performance factors and kinetics were two-fold higher than for the submerged membranes, mostly due to the enhanced contact between the pollutants and the membranes photocatalytic sites where reactive species were generated. These results confirm the advantages of working in a flow-through mode with submerged photocatalytic membranes for the treatment of water polluted with persistent organic molecules, thanks to the reduction in the mass transfer limitations.

show abstract

Oxidative C-H/C-H Coupling of Dipyrromethanes with Azines by TiO2-Based Photocatalytic System. Synthesis of New BODIPY Dyes and Their Photophysical and Electrochemical Properties

Cited by 5 publications

References 52 publications

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Improving the Dispersibility of TiO2 in the Colloidal System Using Trifunctional Spherosilicates

Performance of TiO2-Based Tubular Membranes in the Photocatalytic Degradation of Organic Compounds

Contact Info

Product

Resources

About