Photocatalytic water disinfection under the artificial solar light by fructose-modified TiO2

Rokicka-Konieczna, Paulina; Markowska‐Szczupak, Agata; Kusiak-Nejman, Ewelina; Morawski, Antoni W.

doi:10.1016/j.cej.2019.04.113

Cited by 35 publications

(12 citation statements)

References 72 publications

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“…Photocatalysis is widely used in organic matter degradation and sterilization [ 11 ]. In the degradation of organic pollutants, photocatalytic technology can effectively degrade the pollutants into small molecules such as carbon dioxide, water, and nitrogen [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Application of Photocatalytic Composites and Water Treatment Facility Based on 3D Printing Technology

et al. 2021

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Currently, the degradation of organic pollutants in wastewater by photocatalytic technology has attracted great attention. In this study, a new type of 3D printing material with photocatalytic activity was first prepared to print a water treatment equipment, and then a layer of silver-loaded TiO2 was coated on the equipment to further improve the catalytic degradation performance. The composite filaments with a diameter of 1.75 ± 0.05 mm were prepared by a melt blending method, which contained 10 wt% of modified TiO2 and 90 wt% of PLA. The silver-loaded TiO2 was uniformly coated on the equipment through a UV-curing method. The final results showed that those modified particles were uniformly dispersed in the PLA matrix. The stable printing composite filaments could be produced when 10 wt% TiO2 was added to the PLA matrix. Moreover, the photocatalytic degradation performance could be effectively improved after 5 wt% of silver loading was added. This novel facility showed good degradability of organic compounds in wastewater and bactericidal effect, which had potential applications for the drinking water treatment in the future.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Application of Photocatalytic Composites and Water Treatment Facility Based on 3D Printing Technology

et al. 2021

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“…The DRIFTS measurements were utilized to determine the surface characteristics of the prepared photocatalysts. All spectra presented in Figure 3 showed a narrow band at 1620 cm −1 , as well as a wide band from 3700 cm −1 to 2500 cm −1 , associated with the molecular water and stretching vibrations of surface hydroxyl groups [28,43,44]. An increase of the modification temperature of APTES/TiO2 samples resulted in a decrease of the intensity of these bands, due to the changes in the amount of surface −OH groups [45,46].…”

Section: Characterization Of Materialsmentioning

confidence: 95%

The Role of Adsorption in the Photocatalytic Decomposition of Dyes on APTES-Modified TiO2 Nanomaterials

et al. 2021

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This work investigated for the first time the role of adsorption in the photocatalytic degradation of methylene blue and Orange II dyes in the presence of 3-aminopropyltriethoxysilane (APTES)-modified TiO2 nanomaterials. It has been demonstrated that the decrease in adsorption has a detrimental effect on photocatalytic activity. APTES/TiO2 photocatalysts were successfully prepared by solvothermal modification of TiO2 in a pressure autoclave, followed by heat treatment in an inert gas atmosphere at the temperature range from 300 °C to 900 °C. It was observed that functionalization of TiO2 via APTES effectively suppressed the anatase-to-rutile phase transformation, as well as the growth of crystallites size during calcination, and reduction of specific surface area (APTES modification inhibits sintering of crystallites). The noted alterations in the adsorption properties, observed after the calcination, were generally related to changes in the surface characteristics, mainly surface charges expressed by the zeta potential. Positively charged surface enhances adsorption of anionic dye (Orange II), while negatively charged surface was better for adsorption of cationic dye (methylene blue). The adsorption process substantially affects the efficiency of the photocatalytic oxidation of both dyes. The methylene blue decomposition proceeded according to the pseudo-first and pseudo-second-order kinetic models, while the degradation of Orange II followed the zero, pseudo-first, and pseudo-second order kinetic models.

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“…Titanium dioxide (TiO 2 ) nanoparticles have often been utilized to provide the destruction of pathogens due to their photocatalytic activity when exposed to electromagnetic radiation [ 15 , 16 , 17 ]. In most cases, studies of TiO 2 nanoparticles have been focused on the development of water disinfection methods [ 18 , 19 ]. However, several studies have reported a use of the TiO 2 nanoparticles for the destruction of malignant cells in the human body [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Polymer Membrane Modified with Photocatalytic and Plasmonic Nanoparticles for Self-Cleaning Filters

et al. 2023

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In this study, we developed a filtering material for facial masks, which is capable of trapping and subsequent inactivation of bacteria under white light emitting diodes (LED) or sunlight irradiation. Such a functionality is achieved via the modification of the composite membrane based on porous polymer with photocatalytic (TiO2) and plasmonic (Ag) nanoparticles. The porous polymer is produced by means of a computer numerical control machine, which rolls a photoresist/thermoplastic mixture into a ~20-µm-thick membrane followed by its thermal/ultraviolet (UV) hardening and porosification. TiO2 nanoparticles are prepared by hydrothermal and sol-gel techniques. Colloidal synthesis is utilized to fabricate Ag nanoparticles. The TiO2 photocatalytic activity under UV excitation as well as a photothermal effect generated by plasmonic Ag nanoparticles subjected to LED irradiation are studied by the assessment of methylene blue (MB) decomposition. We demonstrate that, in contrast to the filter of the standard facial medical mask, the polymer membrane modified with spray-coated TiO2 and Ag nanoparticles prevents the penetration of bacillus subtilis from its top to bottom side and significantly inhibits bacterial growth when exposed to LED or sunlight.

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Photocatalytic water disinfection under the artificial solar light by fructose-modified TiO2

Cited by 35 publications

References 72 publications

Fabrication and Application of Photocatalytic Composites and Water Treatment Facility Based on 3D Printing Technology

Fabrication and Application of Photocatalytic Composites and Water Treatment Facility Based on 3D Printing Technology

The Role of Adsorption in the Photocatalytic Decomposition of Dyes on APTES-Modified TiO2 Nanomaterials

Polymer Membrane Modified with Photocatalytic and Plasmonic Nanoparticles for Self-Cleaning Filters

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