Structure–activity relationship of nanosized porous PEG-modified TiO2 powders in degradation of organic pollutants

Lončarević, Davor; Dostanić, Jasmina; Radonjić, Vidosava; Radosavljević-Mihajlović, Ana; Jovanović, D.

doi:10.1016/j.apt.2015.05.012

Cited by 7 publications

(10 citation statements)

References 47 publications

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“…Two distinct particle ranges were noticeable: one at about 30 nm, that is in agreement with crystallite size (obtained from XRD Fig. 1 Pore and particle size distributions, obtained from mercury porosimetry; dotted line represents particle size distribution, while solid line represents pore size distribution measurements [16]) and representing aggregates observable from SEM measurements (Fig. 2).…”

Section: Catalyst Characterizationmentioning

confidence: 57%

“…Scheme 1 Molecular structure of a methylene blue, b arylazo pyridone dye -(5-(4-sulphophenylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridone Experimental TiO 2 synthesis In our previously published paper [16], we presented the conditions used in the TiO 2 synthesis method in detail. This procedure has been modified according to the originally method taken from Bu et al [17].…”

Section: Introductionmentioning

confidence: 99%

“…The formed gel was dried in an oven for 12 h at temperature of 80°C. Finally, the dried gel was calcined in air stream to the final temperature of 550°C and held at this value for 4 h. The synthesized nanoparticles were characterized by XRD, SEM, DRS, Hg porosimetry and N 2 physisorption [16]. We hereby take the approach of measuring the pore diameter, pore volume distribution, and porosity of prepared TiO 2 particles, which were determined by mercury intrusion porosimetry on Pascal 140/440 (Thermo Scientific).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous photodegradation of two textile dyes using TiO2 as a catalyst

Lončarević

Dostanić

Radonjić

et al. 2016

Reac Kinet Mech Cat

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The simultaneous photocatalytic degradation of two dyes: methylene blue (MB), a cationic dye, and arylazo pyridone dye (SD), an anionic dye was investigated using sol-gel prepared TiO 2 particles. The paper shows the main difference in degradation kinetics between single dye solution and binary dye solutions. The effects of competitive adsorption and the concentration of the dyes on degradation rate were analyzed. The preferential adsorption capacity of TiO 2 toward MB was attributed to electrostatic interactions between the cationic dye and negatively charged TiO 2 surface, while repulsion between the negatively charged surface of the catalyst and SD dye results in its lower adsorption capacity. The TiO 2 surface charge and accordingly adsorption affinity of investigated dyes were found to be the main factors affecting degradation rate of the dyes. In the single dye system, the catalyst showed considerably higher degradation activity toward MB than to SD. In binary dye systems, the presence of SD did not affect the degradation of MB. On the other hand, the degradation efficiency of SD was found to be highly influenced by initial MB concentration and absorption ability of MB. In addition, higher MB concentration induces the production of a higher amount of reaction products, which also determine the SD degradation rate. Three kinetic regimes for the photodegradation of SD in binary mixtures were observed, used as a starting point to elucidate most influencing parameters for SD reaction kinetics.Electronic supplementary material The online version of this article (

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Section: Catalyst Characterizationmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous photodegradation of two textile dyes using TiO2 as a catalyst

Lončarević

Dostanić

Radonjić

et al. 2016

Reac Kinet Mech Cat

Self Cite

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“…It is noted that there are references reporting the surface adsorption of PEG on TiO 2 nanoparticles rather than incorporation into them. [29][30][31][32][33][34][35][36] With the increase of PEG amount added, surface area and porosity of PEG-removed TiO 2 nanoparticles was increased significantly, indicating the greatly increased encapsulation of PEG. In comparison, the pore size was greatly increased first and then decreased quickly, and a similar trend was also observed for electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Mesoporous Titania Nanoparticles with Controlled Porosity and Connectivity for Studying the Photovoltaic Properties in Perovskite Solar Cells

et al. 2018

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Mesoporous titania (TiO2) nanoparticles (NPs) were synthesized by treating prehydrolyzed titanium precursors with polyethylene glycol (PEG). By varying the amount of PEG, their different physical properties were tuned appropriately in terms of surface area, pore size/volume, and electrical conductivity. By increasing the amount of PEG in TiO2, the surface area and pore volume of mesoporous TiO2 increased, and no direct correlation with the photovoltaic performance of perovskite solar cells was observed. In comparison, the pore size of mesoporous TiO2 first increased greatly before quickly decreasing, and a similar trend was also observed for electrical conductivity. These implied that the interparticle interaction became much stronger with an optimum amount of PEG added to form mesoporous TiO2 NPs. With an optimum molar ratio of PEG/Ti precursor at 0.75, greatly improved conductivity of mesoporous TiO2 NPs with interconnection as compared to that prepared in the absence of PEG, which was used as an electron transport layer, improved the power conversion efficiency of perovskite solar cells by ≈36%. Their greatly reduced photoluminescence after incorporating the perovskite also revealed a difference in the electron‐injection properties from the perovskite into mesoporous TiO2. This strategy highlights a versatile tool to tune mesoporous structures to achieve a cooperative effect for studying photovoltaic properties in perovskite solar cells.

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“…To improve stability of FeCl3 catalyst, FeCl3/polyvinylpyrrolidone (PVP) was prepared using PVP as protective agent [14]. Polyethylene glycol (PEG) can also be used as a template [15] or a modifier [16] to improve catalytic performances of catalysts. Compared with PVP, PEG 1000 is very cheaper, so we prepared amorphous iron oxyhydroxide using PEG 1000 as a modifier to improve its catalytic performances in the reduction of nitrobenzene to aniline with hydrazine hydrate as a hydrogen donor (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Preparation of FeO(OH) Modified with Polyethylene Glycol and Its Catalytic Activity on the Reduction of Nitrobenzene with Hydrazine Hydrate

Cai

Liu

Song

et al. 2016

Bull. Chem. React. Eng. Catal.

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Iron oxyhydroxide was prepared by dropping ammonia water to Fe(NO3)3.9H2O dispersed in polyethylene glycol (PEG) 1000. The catalyst was characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy and laser particle size analyzer. The results showed the catalyst modified with polyethylene glycol was amorphous. The addition of PEG during the preparation make the particle size of the catalyst was smaller and more uniform. The catalytic performance was tested in the reduction of nitroarenes to corresponding amines with hydrazine hydrate, and the catalyst showed excellent activity and stability.

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Structure–activity relationship of nanosized porous PEG-modified TiO2 powders in degradation of organic pollutants

Cited by 7 publications

References 47 publications

Simultaneous photodegradation of two textile dyes using TiO2 as a catalyst

Simultaneous photodegradation of two textile dyes using TiO2 as a catalyst

Fabrication of Mesoporous Titania Nanoparticles with Controlled Porosity and Connectivity for Studying the Photovoltaic Properties in Perovskite Solar Cells

Preparation of FeO(OH) Modified with Polyethylene Glycol and Its Catalytic Activity on the Reduction of Nitrobenzene with Hydrazine Hydrate

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