Novel modified nonalkoxide sol–gel synthesis of multiphase high surface area TiO2 aerogels for photocatalysis

Bernardes, Joseane C.; Pinheiro, Geneviève K.; Müller, Daliana; Latocheski, Eloah; Domingos, Josiel B.; Rambo, Carlos R.

doi:10.1007/s10971-020-05286-z

Cited by 14 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Titania aerogels were prepared by the modified sol-gel route proposed in [10]. Briefly, titanium trichloride (TiCl 3 , Vetec) was dissolved in 10 mL of absolute ethanol.…”

Section: Methodsmentioning

confidence: 99%

Aerogel‐Based TiO₂ Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Barreiro

Pinheiro

Wesling

et al. 2020

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

Inkjet printing presents a high potential for cost reduction of electronic devices manufacturing due to the capacity to deposit materials with high precision, less material waste, and large-scale production through the roll-to-roll printing processes. In this work, a nanostructured TiO2 ink was developed using TiO2 aerogel and an alkaline aqueous solution, which resulted in a very stable suspension. A high-intensity ultrasonic mixer was used to fragment and disperse TiO2 aerogels producing suspensions with particles smaller than 200 nm, which are suitable for the inkjet printing process. For the development of the ink, the viscosity and surface tension were adjusted by using glycerol and a surfactant (Triton X-100). The influence of those components on the properties of the ink was evaluated for different concentrations. After formulation of the inks, the printing parameters were adjusted to optimize the process. Films with high surface area and less than 100 nm grain size were successfully produced. Electrical measurements revealed a resistive-like behavior with the sheet resistance increasing with number of printed layers.

show abstract

“…Titania aerogels were prepared by the modified sol-gel route proposed in [10]. Briefly, titanium trichloride (TiCl 3 , Vetec) was dissolved in 10 mL of absolute ethanol.…”

Section: Methodsmentioning

confidence: 99%

Aerogel‐Based TiO₂ Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Barreiro

Pinheiro

Wesling

et al. 2020

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Aerogels were reported as suitable catalysts for photocatalytic applications, for example, the degradation of dyes or organic substances and hydrogen evolution. − Especially, TiO 2 and composite aerogels are promising materials for efficient photocatalysis, due to the high number of reactive sites and improved charge separation. , Both the polymorphic forms of TiO 2 and the morphological and structural characteristics were reported as crucial factors for photocatalysis. Different synthesis procedures for TiO 2 aerogels are reported in the literature to optimize the synthesis parameters and consequently the morphological and structural characteristics with regard to photocatalytic hydrogen evolution.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity and Electron Storage Capability of TiO₂ Aerogels with an Adjustable Surface Area

Rose

Hofmann

Voepel

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Mesoporous TiO 2 aerogels with a surface area larger than 600 m 2 g −1 have been prepared via acid-catalyzed sol−gel synthesis and supercritical drying. Varying temperature treatments in air result in changes in the morphology of the aerogels and their specific surface area. Interestingly, the ability to store photogenerated electrons in the surface states of the aerogels upon illumination of dispersions in water−methanol mixtures increases at lower calcination temperatures. Additionally, the extent of electron storage capability also depends on hole scavenger concentration. Increasing the calcination temperature to 500 °C results in a decreased surface area and electron storage capability but increased hydrogen evolution rates. Finally, nitrogen reduction to ammonia in the dark is performed with photogenerated stored electrons in TiO 2 aerogels, separating the charge carrier photogeneration from the dark reduction reaction.

show abstract

High Specific Surface Area TiO₂ Aerogels Incorporated in situ with Co/Mn Oxides as Stable Electrochemical Capacitor Electrodes

Bernardes,

Dal Ross,

Rambo

2024

Adv Eng Mater

View full text Add to dashboard Cite

Nanocomposite aerogels comprised of TiO2 and metal (Co and Mn) oxides, were synthesized via an in situ sol‐gel method in this study, and their structural, compositional and electrochemical properties were evaluated for possible applications as electrodes in energy storage devices. The inclusion of metallic oxides into TiO2 aerogels hindered the formation of titania crystalline phases, preserved particle sizes close to their original dimensions and yielded higher specific surface areas compared to pure TiO2 aerogels after heat treatment. High specific surface areas in aerogels positively affects the electrochemical properties, allowing a high electrochemical activity of the electrodes, in addition to intensifying the transport of ions and solvents through the mesoporous network of this material. Evaluation of the electrochemical properties of the aerogel‐based nanocomposites involved galvanostatic charge‐discharge, cyclic voltammetry, and impedance spectroscopy. The nanocomposites exhibited enhanced electrochemical properties and stable performance within the range suitable for supercapacitor applications, as indicated by the Ragone chart. Notably, aerogels with higher incorporation of cobalt and manganese oxides in TiO2 aerogels exhibited significantly elevated specific surface areas, reaching 562 m2/g and 555 m2/g, respectively. These values are notably high for nanocomposites, underscoring the potential of these electroactive materials for electrochemical capacitors.This article is protected by copyright. All rights reserved.

show abstract

Novel modified nonalkoxide sol–gel synthesis of multiphase high surface area TiO2 aerogels for photocatalysis

Cited by 14 publications

References 54 publications

Aerogel‐Based TiO₂ Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Aerogel‐Based TiO₂ Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Photocatalytic Activity and Electron Storage Capability of TiO₂ Aerogels with an Adjustable Surface Area

High Specific Surface Area TiO₂ Aerogels Incorporated in situ with Co/Mn Oxides as Stable Electrochemical Capacitor Electrodes

Contact Info

Product

Resources

About

Novel modified nonalkoxide sol–gel synthesis of multiphase high surface area TiO2 aerogels for photocatalysis

Cited by 14 publications

References 54 publications

Aerogel‐Based TiO2 Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Aerogel‐Based TiO2 Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Photocatalytic Activity and Electron Storage Capability of TiO2 Aerogels with an Adjustable Surface Area

High Specific Surface Area TiO2 Aerogels Incorporated in situ with Co/Mn Oxides as Stable Electrochemical Capacitor Electrodes

Contact Info

Product

Resources

About

Aerogel‐Based TiO₂ Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Aerogel‐Based TiO₂ Stable Inks for Direct Inkjet Printing of Nanostructured Layers

Photocatalytic Activity and Electron Storage Capability of TiO₂ Aerogels with an Adjustable Surface Area

High Specific Surface Area TiO₂ Aerogels Incorporated in situ with Co/Mn Oxides as Stable Electrochemical Capacitor Electrodes