Influence of the gelation and calcination temperatures on physical parameters and photocatalytic activity of mesoporous titania powders synthesized by the nonhydrolytic sol–gel process

Petrović, Rada; Tanasković, N.; Djokić, Veljko; Radovanović, Željko; Janković-Čaštvan, Ivona; Stamenkovic, I.; Janaćković, Djordje

doi:10.1016/j.powtec.2011.12.049

Cited by 11 publications

(7 citation statements)

References 27 publications

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“…The simultaneous presence of the anatase and rutile phase in TiO 2 causes a reduction in the recombination of electrons and holes and results in an increase in photocatalytic activity . It is known that the calcination temperature influences the anatase/rutile ratio in the photocatalyst . Thus, higher crystallization due to calcination results in an increased H 2 production.…”

Section: Resultsmentioning

confidence: 99%

The influence of process parameters on photocatalytic hydrogen production

Bednarczyk

Stelmachowski

Gmurek

2018

Env Prog and Sustain Energy

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High‐efficiency photocatalysts that are synthesized for hydrogen production via photocatalytic water splitting and glycerol conversion without the generation of additional pollutants are presented. Photocatalytic hydrogen production is particular promising because it utilizes glycerol, which is an inexpensive waste from biodiesel production. The main goal of the investigation was the proper selection of photocatalysts based on finding the optimal conditions of the photocatalytic production of hydrogen in the glycerol–water system. TiO2 as well as TiO2 doped with platinum, palladium or gold (0.1, 0.5, 1 wt%), prepared by the photodeposition and sol–gel method, were applied as photocatalysts. The photocatalysts were characterized by X‐ray powder diffraction analysis (XRD). The influences of the preparation methodology, the addition of the doped metal and amount of the doping, radiation intensity, solvent additives, and the amount of photocatalysts on process efficiency were investigated. The efficiency of hydrogen production is high compared to that reported in the literature. It was found that a high yield is impossible without the addition of glycerol or other organic compounds. The hydrogen production exceeded 141 × 103 μmol H2/h·gcat when 0.5 wt% Pt doped TiO2 was used. The novelty of this study is the highest hydrogen productivity obtained at a laboratory scale. The production rate of hydrogen depended on the catalyst concentration, the amount of the noble metal in the catalysts and the glycerol concentration. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 680–687, 2019

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Section: Resultsmentioning

confidence: 99%

The influence of process parameters on photocatalytic hydrogen production

Bednarczyk

Stelmachowski

Gmurek

2018

Env Prog and Sustain Energy

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“…P160 TiO 2 was prepared according to a previously procedure published. 11,12 The textile dye, CI Basic Yellow 28, was obtained from Bezema as a gift (commercial name Bezacryl Goldgelb GL 200) and was used without purification. Deionized water was obtained from a Milipore Waters Milli Q purification unit.…”

Section: Methodsmentioning

confidence: 99%

“…18 The surface of the catalyst is positive below pH 6.0, and as the pH decreases, the functional groups are protonated (TiOH 2 + ), and the proportion of the positively charged surface increases (Eq. (13)): 8 TiOH + OH - TiO -+ H 2 O, pH > pH zpc (12) TiOH + H +  TiOH 2 + , pH < pH zpc (13) It was found that the initial photodegradation rate was higher at 5.2 than in more acidic or alkaline solutions (Fig. 6).…”

Section: Effect Of Phmentioning

confidence: 97%

“…The most frequently used methods are sol-gel method, hydrothermal processing and gas-phase reaction. 10 The aim of the present study was to investigate the influence of various parameters on the photocatalytic decomposition of the textile dye CI Basic Yellow 28 in the presence of a recently synthesized P160 TiO 2 -based catalyst 11,12 irradiated under an Osram ultra-vitalux  lamp as the light source. CI Basic Yellow 28 dye is a cationic azo dye that can be also be called an azomethine dye (-CH=N-) or hydrazone dye (=N-N(H,R)-) (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The P160 TiO 2 -based catalyst was synthesized by a non-hydrolytic sol-gel process. 11,12 The effects of parameters such as initial concentration of catalyst, initial dye concentration, pH and the presence of salts (NaCl, Na 2 SO 4 , NaNO 3 and Na 2 CO 3 ) were studied. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A study of photocatalytic degradation of textile dye CI basic yellow 28 in water using P160 TiO2 based catalyst

Djokić¹,

Vujovic²,

Marinković³

et al. 2012

J Serb Chem Soc

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The photocatalytic degradation of synthetic textile dye CI Basic Yellow 28 (BY28) in water, using recently synthesized P160 TiO2 based catalyst, under Osram ultra-vitalux® lamp (300 W) light, was studied. The effect of the operational parameters such as initial concentration of catalyst, initial dye concentration and pH was studied. Salt effect was also investigated (NaCl, Na2CO3, Na2SO4, NaNO3). It was found that the optimal concentration of catalyst is 2.0 g L-1. A pseudo first-order kinetic model was illustrated using the Langmuir-Hinshelwood mechanism, and the adsorption equilibrium constant and the rate constant of the surface reaction were calculated (KBY = 6.126 L mg-1 and kC = 0.272 mg L-1 min-1, respectively). The photodegradation rate was higher in weak acidic than in high acidic and alkaline conditions. The presence of CO32- ions increases the photodegradation rate while Cl-, SO42- and NO3-ions decreases the reaction rate. The rate of photodegradation of BY28 was measured using UV-Vis spectroscopy. [Projekat Ministarstva nauke Republike Srbije, br. III 45019 and br. 172013.

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Controlled nanostructuring of TiO2 nanoparticles: a sol–gel approach

Riaz

Naseem

2014

J Sol-Gel Sci Technol

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Influence of the gelation and calcination temperatures on physical parameters and photocatalytic activity of mesoporous titania powders synthesized by the nonhydrolytic sol–gel process

Cited by 11 publications

References 27 publications

The influence of process parameters on photocatalytic hydrogen production

The influence of process parameters on photocatalytic hydrogen production

A study of photocatalytic degradation of textile dye CI basic yellow 28 in water using P160 TiO2 based catalyst

Controlled nanostructuring of TiO2 nanoparticles: a sol–gel approach

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