Microwave assisted synthesis of high surface area TiO 2 aerogels: A competent photoanode material for quasi-solid dye-sensitized solar cells

Alwin, S.; Shajan, X. Sahaya; Karuppasamy, K.; Warrier, K. G. K.

doi:10.1016/j.matchemphys.2017.04.045

Cited by 52 publications

(21 citation statements)

References 51 publications

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“…The TiO 2 aerogel can be obtained by the sol-gel method using special drying methods such as supercritical [ 18 , 19 , 20 ], sublimation [ 21 ], and subcritical [ 22 ] drying or drying under ambient conditions [ 23 ] to preserve the formed mesopores. The most commonly used method for aerogel drying is supercritical drying, and it requires specific equipment and results in high production costs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Precursor Nature and Sol-Gel Synthesis Conditions on TiO2 Aerogel’s Structure

Donėlienė¹,

Fataraitė‐Urbonienė

Rudzikas³

et al. 2021

Molecules

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The aim of this investigation was to synthesize high porosity TiO2 aerogel by applying sol-gel and subcritical drying methods and to identify the influence of reagent’s nature and synthesis conditions on their structural and optical properties. Methods of XRD, FT-IR, BET, STA, SEM, and UV-vis were applied to investigate and compare the properties of synthesized TiO2 aerogels and to determine the most effective synthesis route. The structural parameters of the synthesized materials can be varied by changing the precursor type (titanium (IV), isopropoxide (TIP), or tetrabutylorthotitanate (TBOT)) and the nature of the solvent used for additional exchange (n-hexane (nH), cyclohexane (CH), or diethyl ether (DE)). All of the subcritical dried samples show the amorphous structure, which tends to crystallize into the anatase phase after calcination. The number of micro and mesopores and the specific surface area depends on the synthesis conditions. The pores with the highest diameter have been found for additionally nH exchanged and aged aerogel synthesized from precursor TIP. Despite the imperfections in the structure, the produced aerogels show structural and optical properties typical of the TiO2 structures mentioned in the literature.

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Section: Introductionmentioning

confidence: 99%

Effect of Precursor Nature and Sol-Gel Synthesis Conditions on TiO2 Aerogel’s Structure

Donėlienė¹,

Fataraitė‐Urbonienė

Rudzikas³

et al. 2021

Molecules

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“…It has also been proven that the synthesis method, yielding particles with different sizes and shapes, plays a key role on the photocatalytic performance [26]. TiO 2 nanopowders can be prepared via various routes like sol gel, chemical vapor deposition, pyrolysis and hydrothermal treat ment [27][28][29][30]. The sol-gel technique offers advantages to support metal catalysts, since the active metal and support can be prepared in a single step [31,32].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted sol-gel synthesis of an Au-TiO2 photoanode for the advanced oxidation of paracetamol as model pharmaceutical pollutant

Hernández

Olvera-Rodriguez

Guzmán

et al. 2018

Electrochemistry Communications

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An Au-TiO 2 photoanode on carbon cloth has been synthesized by microwave-assisted sol-gel method to treat paracetamol solutions at pH 3.0 by photocatalysis (PC), electro-oxidation (EO), photoelectrocatalysis with UVA light (PEC), solar PEC (SPEC) and hybrid methods with photoelectro-Fenton under UVA (PEC + PEF) and sunlight (SPEC + SPEF) irradiation at constant anodic potential (E an). The photoanode has been characterized by XRD, Raman spectroscopy, HRTEM and SEM-EDS. The counter electrode was a 316L stainless steel plate, which was replaced by an air-diffusion electrode for H 2 O 2 generation in hybrid treatments. The most powerful process was SPEC + SPEF, yielding total paracetamol removal in <30 min and 24% mineralization after 180 min, at E an = +0.82 V. The paracetamol decay followed a pseudo-first-order kinetics in PEC. A lower rate constant was obtained upon increase of pharmaceutical concentration, showing good linear fit using a Langmuir-Hinshelwood model.

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“…Mesoporous TiO 2 with varying surface area was synthesized using different templates and achieved a superior DSSC performance [9]. High-surface area TiO 2 aerogels were obtained through microwave-assisted method and a maximum power conversion efficiency of 5.2% was attained in quasi-solid DSSCs [10]. Our recent reports show that plasma treatment of TiO 2 aerogel increases the specific surface area and hydrophilicity, which enhances the amount of dye adsorption, consequently, the DSSC performance [11,12].…”

Section: Introductionmentioning

confidence: 99%

$$\hbox {TiO}_{2}$$ TiO 2 aerogel–metal organic framework nanocomposite: a new class of photoanode material for dye-sensitized solar cell applications

Alwin¹,

Ramasubbu²,

Shajan³

2018

Bull Mater Sci

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TiO 2 aerogel-metal organic framework (MOF) nanocomposite was synthesized using sol-gel method followed by subcritical drying technique and employed as a photoanode material in quasi-solid dye-sensitized solar cells (DSSCs). The nanocomposite material showed a BET surface area of 250 m 2 g −1 with an average pore size of 5 nm. Field emission scanning electron microscopic images revealed the continuous arrangement of pore-solid network structure. Energy-dispersive X-ray analysis shows the presence of MOF clusters on TiO 2 aerogel network. X-ray photoelectron spectroscopic analysis also supports the presence of MOF clusters in the aerogel network and indicates the presence of some oxygen vacancies in the nanocomposite material. The TiO 2 aerogel-MOF nanocomposite was used as photoanode in DSSC and an overall power conversion efficiency 2.34% along with a short-circuit current density 6.22 mA cm −2 was achieved.

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Microwave assisted synthesis of high surface area TiO 2 aerogels: A competent photoanode material for quasi-solid dye-sensitized solar cells

Cited by 52 publications

References 51 publications

Effect of Precursor Nature and Sol-Gel Synthesis Conditions on TiO2 Aerogel’s Structure

Effect of Precursor Nature and Sol-Gel Synthesis Conditions on TiO2 Aerogel’s Structure

Microwave-assisted sol-gel synthesis of an Au-TiO2 photoanode for the advanced oxidation of paracetamol as model pharmaceutical pollutant

$$\hbox {TiO}_{2}$$ TiO 2 aerogel–metal organic framework nanocomposite: a new class of photoanode material for dye-sensitized solar cell applications

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