Synthesis and characterization of Ag/TiO2/composite aerogel for enhanced adsorption and photo-catalytic degradation of toluene from the gas phase

Jafari, Ahmad Jonoidi; Kermani, Majid; Hosseini-Bandegharaei, Ahmad; Rastegar, Ayoob; Gholami, Mitra; Alahabadi, Ahmad; Farzi, Gholamali

doi:10.1016/j.cherd.2019.07.017

Cited by 38 publications

(5 citation statements)

References 43 publications

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“…It is then interesting to further explore the possible applications of such metal/metal oxide aerogel-based photocatalysts especially to those reactions on a gas–solid interface, , which can better utilize the microstructure advantages of the aerogel and may prevent the possible structural destruction when dispersing the carefully dried aerogels back to a liquid medium again . Gas-phase photodegradation of toluene was studied on an Ag/TiO 2 composite aerogel surface . A later study adopted photocatalytic CO oxidation as the model reaction to show how the size and distribution of Au and TiO 2 phases in an aerogel would affect such a gas–solid catalytic activity, and gas-phase H 2 evolution reactions have been studied on a self-assembled PdAu–TiO 2 monolithic composite aerogel .…”

Section: Introductionmentioning

confidence: 99%

Ag–CeO₂ Composite Aerogels as Photocatalysts for CO₂ Reduction

Ouyang

et al. 2022

ACS Appl. Energy Mater.

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Composite aerogels with a metallic Ag phase and a semiconductor CeO2 phase are prepared using a conventional epoxide assistant sol–gel method and ethanol supercritical drying. In such an aerogel, CeO2 nanoparticles surround Ag nanoparticles to form a continuous network for mass and charge transfer. The photocatalytic CO2 reduction reaction is studied on the gas–solid interface of the composite aerogels. It is found that with the Ag additives, the activity of the composite aerogels is greatly improved compared with that of pristine CeO2, both under the full-spectrum light and visible light. A high CH4 yield up to 21.9 μmol/g/h and high selectivity can be simultaneously achieved in a composite aerogel containing ∼5 wt.% Ag. Such an enhancement is attributed to the surface plasmon resonance effect brought by Ag, which promotes charge generation and separation efficiency in the composite aerogel.

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Section: Introductionmentioning

confidence: 99%

Ag–CeO₂ Composite Aerogels as Photocatalysts for CO₂ Reduction

Ouyang

et al. 2022

ACS Appl. Energy Mater.

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“…According to XRD, SEM, and energy-dispersive X-ray, titanium dioxide nanoparticles were evenly scattered on the aerogel surface, and Ag nanoparticles were well spread between them. [112] While Ryu et al reported on constructing an active and selective catalyst for the aqueous phase hydrodeoxygenation (APHDO) reaction, this study examined the endurance of the catalyst owing to the harsh conditions. APHDO of 1-propanol (1-PrOH) was carried out using Pt catalysts based on crystalline Nb 2 O 5 xH 2 O, amorphous SiO 2 , Al 2 O 3 , and Nb 2 O 5 (niobium pentoxide) aerogels.…”

Section: Gas-phase Catalystmentioning

confidence: 99%

“…According to XRD, SEM, and energy‐dispersive X‐ray, titanium dioxide nanoparticles were evenly scattered on the aerogel surface, and Ag nanoparticles were well spread between them. [ 112 ]…”

Section: Applications Of Silica Aerogelmentioning

confidence: 99%

Silica Aerogel: Synthesis, Characterization, Applications, and Recent Advancements

Rashid¹,

Shishir²,

Mahfuz³

et al. 2023

Part & Part Syst Charact

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Silica aerogels have drawn considerable attention due to their low density (almost 95% of the total volume is composed of air), hydrophobicity, optical transparency, low conductivity of heat, and large surface to volume ratio. Sol–gel processing is used to prepare aerogels from molecular precursors. To replace the pore fluid with air while retaining the solid network, a supercritical drying process (the most frequent approach) is used. However, recent technologies use atmospheric pressure to allow for liquid removal followed by chemical alteration of the gel's internal layer, which leaves only a silica network with a porous structure filled with air. This study discusses the sol–gel method for preparing silica aerogels and their various drying processes. Furthermore, various areas of applications of silica aerogels, including electronics, construction, aerospace, purification of water and air, sensing, catalyst, biomedical, absorbent, food packing, textile, etc., are also discussed. Lastly, this review provides a perception of the recent scientific progress along with the futuristic development of silica aerogel.

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“…Highly porous metal oxide aerogels are also beneficial for decomposing gas-phase pollutants and toxic chemicals in the air . An Ag/TiO 2 composite aerogel was prepared for removing toluene in the flowing air . The results showed that 95.7% of 300 ppm of toluene was decomposed under light irradiation.…”

Section: Photocatalytic Applications Of Metal Oxide Aerogelsmentioning

confidence: 99%

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

Zhi

Tang

et al. 2022

Energy Fuels

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Metal oxide aerogels have emerged as a new class of photocatalysts. As a type of 3-dimensional (3D) porous structure, an aerogel owns the characteristics of high specific surface area, tunable pore size, and large pore volume, which can distinguish itself from conventional powder or film counterparts. Such merits allow aerogels to expose more active catalytic sites and support other active cocatalysts. Metal oxide aerogels in a monolithic form also overcome the recycling and separation issues that hinder the application of free-standing powder photocatalysts. This article reviews the typical synthesis methodologies of metal oxide aerogels, including alkoxide hydrolysis and condensation, epoxide assistant, and self-assembly. It also discusses the interfacial charge and mass transfer processes in metal oxide aerogels and correlations among the composition, microstructure, and photocatalytic activity. In addition, this article gives a summary of photocatalytic applications of aerogels in water purification and sterilization, solar water splitting, and gas-phase reactions such as CO 2 reduction and CO oxidation. It also discusses the strategies for enhancing the performance of aerogel photocatalysts. In particular, this paper highlights the recent development of plasmonic aerogel photocatalysts.

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Synthesis and characterization of Ag/TiO2/composite aerogel for enhanced adsorption and photo-catalytic degradation of toluene from the gas phase

Cited by 38 publications

References 43 publications

Ag–CeO₂ Composite Aerogels as Photocatalysts for CO₂ Reduction

Ag–CeO₂ Composite Aerogels as Photocatalysts for CO₂ Reduction

Silica Aerogel: Synthesis, Characterization, Applications, and Recent Advancements

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

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Synthesis and characterization of Ag/TiO2/composite aerogel for enhanced adsorption and photo-catalytic degradation of toluene from the gas phase

Cited by 38 publications

References 43 publications

Ag–CeO2 Composite Aerogels as Photocatalysts for CO2 Reduction

Ag–CeO2 Composite Aerogels as Photocatalysts for CO2 Reduction

Silica Aerogel: Synthesis, Characterization, Applications, and Recent Advancements

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

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Product

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Ag–CeO₂ Composite Aerogels as Photocatalysts for CO₂ Reduction

Ag–CeO₂ Composite Aerogels as Photocatalysts for CO₂ Reduction