Photocatalytic activity of TiO2–SBA-15 under UV and visible light

Lachheb, Hinda; Ahmed, Oday H.; Houas, Ammar; Nogier, J.P.

doi:10.1016/j.jphotochem.2011.09.017

Cited by 66 publications

(27 citation statements)

References 38 publications

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“…) was produced because adsorbed O 2 readily traps electrons generated during photo-catalysis [25][26][27][28] and degrades the MO dye to CO 2 and other intermediate products. Stability is an important property for photo-catalysts, so in an effort to examine the stability of Ag/ZnO/SBA-15, recycling of the photo-catalyst was tested for MO photo-catalytic degradation (Fig.…”

Section: Catalytic Performancementioning

confidence: 99%

Synthesis, characterization, and photo-catalytic activity of Ag/ZnO/SBA-15 composite

Zhou¹

2019

Desalination and Water Treatment

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Herein, the mesoporous silica material SBA-15 was chosen as a carrier to load photo-catalytic composite materials. To promote the catalytic activity of ZnO under solar light, photo-reduced Ag/ZnO materials were synthesized onto SBA-15. These composite materials were unambiguously characterized using a variety of spectroscopic techniques. The adsorption and catalytic efficiencies of these catalysts were evaluated by the decomposition of Methyl Orange (MO). The resulting material showed enhanced photo-catalytic efficiency with 96% MO degradation using just simulated solarlight irradiation over 60 min. With excellent stability and recyclability, Ag/ZnO/SBA-15 represents a promising photo-catalyst for decontamination applications.

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Section: Catalytic Performancementioning

confidence: 99%

Synthesis, characterization, and photo-catalytic activity of Ag/ZnO/SBA-15 composite

Zhou¹

2019

Desalination and Water Treatment

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“…be used as a template for anode or cathode materials for batteries [68][69][70]. Furthermore, it can also be used in solar cell applications, both as a template for incorporation of titania or cobalt nanoparticles [42,44,[71][72][73], and as a scattering layer for improving the cell efficiency [74].…”

Section: Energy Applicationsmentioning

confidence: 99%

“…As mentioned in Section 3.3.2, the properties of P123 is temperature dependent, and therefore this is a good way of tuning the properties in term of pore size, micropore volume and specific surface area of the final product. Several studies of the effect of the hydrothermal treatment have been performed on standard syntheses [14,[84][85][86][87], with varying silica precursors [73], and syntheses with swelling agents [88].…”

Section: Hydrothermal Treatmentmentioning

confidence: 99%

Mesoporous Building Blocks: Synthesis and Characterization of Mesoporous Silica Particles and Films

Björk¹

2013

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On the cover, the structure of SBA-15 is illustrated. Inside the pores SEM micrographs have been inserted showing (clockwise from the top): rods, fibers, a film consisting of rods grown on a substrate, a film consisting of platelets grafted on a substrate, short rods, and platelets. In the center the sheet morphology is presented.© Emma Björk, unless otherwise stated.ISBN: 978-91-7519-516-2 ISSN: 0345-7524 Printed by LiU-tryck, Linköping, Sweden, 2013 Research is formalized curiosity. It is poking and prying with a purposeZora Neale Hurston (1903Hurston ( -1960 i ABSTRACTCatalyst supports, drug delivery systems, hosts for nanoparticles, and solar cells are just some examples of the wide range of exciting applications for mesoporous silica. In order to optimize the performance of a specific application, controlling the material's morphology and pore size is crucial. For example, short and separated particles are beneficial for drug delivery systems, while for molecular sieves, the pore size is the key parameter.In this thesis, mesoporous silica building blocks, crystallites, with hexagonally ordered cylindrical pores were synthesized, with the aim to understand how the synthesis parameters affect the particle morphology and pore size. The synthesis of the particles is performed using a sol-gel process, and in order to increase the pore size, a combination of low temperature, and additions of heptane and NH 4 F was used. By variations in the amounts of reagents, as well as other synthesis conditions, the particle morphology and pore size could be altered. Separated particles were also grown on or attached to substrates to form films. Also, a material with spherical pore structure was synthesized, for the first time using this method.It was found that a variation in the heptane concentration, in combination with a long stirring time, yields a transition between fiber and sheet morphologies. Both morphologies consist of crystallites, which for the fibers are joined end to end, while for the sheets they are attached side by side such that the pores are accessible from the sheet surface. The crystallites can be separated to a rod morphology by decreasing the stirring time and tuning the HCl concentration, and it was seen that these rods are formed within 5 min of static time, even though the pore size and unit cell parameters were evolving for another 30 min. Further studies of the effects of heptane showed that the shape and mesoscopic parameters of the rods are affected by the heptane concentration, up to a value where the micelles are fully saturated with heptane. It was also observed that the particle width increases with decreasing NH 4 F concentration, independent of heptane amount, and a platelet morphology can be formed. The formation time of the particles decrease with decreasing NH 4 F, and the growth mechanism for platelets was further studied. The pore sizes for various morphologies were altered by e.g. variations in the hydrothermal treatment conditions, or the method for removing the surfactants.ii T...

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“…[15] Recently, introducing semiconductor nanoparticles into mesoporous materials has attracted great interest. For instance, (ZnOÀ CuO)/SBA-15, [20] SnO 2 /SBA-15, [21] and TiO 2 -SBA-15 [22] materials show higher photodegradation activity than unsupported catalyst. Titanium dioxide (TiO 2 ) has been practically used as photocatalyst because of its relatively long lifetime of electron-hole pair and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ordered Mesoporous Alumina Supported‐ZnO/NiO Nanocomposite Using Supercritical Carbon Dioxide Impregnation and Its Photocatalytic Performance

2019

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ZnO/NiO nanoparticles supported on ordered mesoporous alumina (OMA) have been prepared by supercritical carbon dioxide impregnation using Zn(NO3)2 ⋅ 6H2O and Ni(NO3)2 ⋅ 6H2O as the precursors, supercritical carbon dioxide as the solvent and methanol as the co‐solvent. The ordered mesostructures of OMA were well‐maintained during the preparation. Ordered mesoporous alumina was prepared via solvent evaporation self‐assembly. The photocatalytic performance of ZnO/NiO/OMA composites for degradation of Congo Red was studied under simulated sunlight irradiation. The results showed that photocatalytic activity of the ZnO/NiO/OMA prepared by supercritical carbon dioxide impregnation was superior to those of commercial P‐25 and the composites prepared via the incipient wetness impregnation. The removal rate of Congo Red was found to be dependent on both the microstructure of the prepared ZnO/NiO/OMA composites and also the molar ratio of ZnO/NiO nanoparticles in OMA. The optimal molar ratio of ZnO/NiO was investigated to achieve a maximum photocatalytic activity.

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Photocatalytic activity of TiO2–SBA-15 under UV and visible light

Cited by 66 publications

References 38 publications

Synthesis, characterization, and photo-catalytic activity of Ag/ZnO/SBA-15 composite

Synthesis, characterization, and photo-catalytic activity of Ag/ZnO/SBA-15 composite

Mesoporous Building Blocks: Synthesis and Characterization of Mesoporous Silica Particles and Films

Preparation of Ordered Mesoporous Alumina Supported‐ZnO/NiO Nanocomposite Using Supercritical Carbon Dioxide Impregnation and Its Photocatalytic Performance

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