Photocatalytic Performance of Titanates with Formula MTiO3 (M= Fe, Ni, and Co) Synthesized by Solvo-Combustion Method

Morín, María Elvira Zarazúa; Torres-Martı́nez, Leticia M.; Sánchez-Martínez, D.; Gómez-Solís, C.

doi:10.1590/1980-5373-mr-2016-0615

Cited by 28 publications

(5 citation statements)

References 33 publications

(49 reference statements)

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“…The UV–vis absorption spectra of our systems show a band shift from 554 nm, the maximum absorption of RhB, to 530 nm (Figure S23). As reported earlier, this effect indicates that photodegradation occurs via N-deethylation. − It was found that the photodegradation of RhB was negligible if the experiment was performed under an argon atmosphere, indicating that the presence of oxygen is essential. Generally, it is known that when a photocatalyst is irradiated by light, various generated reactive oxygen species (ROS) can degrade the pollutants.…”

Section: Resultssupporting

confidence: 55%

Graphene Oxide Functionalized with Cationic Porphyrins as Materials for the Photodegradation of Rhodamine B

et al. 2020

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Two noncovalent nanohybrids between cationic porphyrin (free-base TMPyP and zinc(II) ZnTMPyP) bearing cationic ( N -methylpyridyl) groups and graphene oxide (GO) were constructed with the aim of generating a photocatalyst active for rhodamine B (RhB) degradation. The obtained materials were thoroughly characterized by steady-state and time-resolved absorption and emission methods, which indicated that metalation of the porphyrin with Zn(II) increases the affinity of the porphyrin toward the GO surface. Photocurrent experiment together with femtosecond transient absorption spectroscopy clearly showed the existence of electron transfer from the photoexcited porphyrin to GO. Both hybrid materials demonstrated higher photocatalytic activity toward RhB degradation as compared to GO; however, ZnTMPyP–GO exhibited more efficient performance (19% of RhB decomposition after 2 h of irradiation). Our data indicate that the presence of Zn(II) in the core of the porphyrin can promote charge separation in the ZnTMPyP–GO composites. The higher degradation rate seen with ZnTMPyP–GO as compared to the TMPyP–GO assemblies highlights the beneficial role of Zn(II)-metalation of the porphyrin ring.

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Section: Resultssupporting

confidence: 55%

Graphene Oxide Functionalized with Cationic Porphyrins as Materials for the Photodegradation of Rhodamine B

et al. 2020

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“…Perovskite oxide has been proven to be an important class of photocatalysts 7 . As one of the perovskite photocatalysts, BiFeO 3 exhibits visible-light-driven photocatalytic activity for the degradation of dyes and water splitting due to its narrow bandgap and chemical stability [8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

Yang

Tang

et al. 2018

Mat. Res.

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In this work, the g-C 3 N 4 nanoparticles decorated BiFeO 3 microspheres composites (g-C 3 N 4 / BiFeO 3 ) were successfully synthesized by hydrothermal treatment of g-C 3 N 4 nanoparticles together with BiFeO 3 microspheres. The SEM and HRTEM observation indicate that the C 3 N 4 nanoparticles with size of 30-50 nm are well decorated on the surface of BiFeO 3 microspheres. The photocatalytic activities of the samples are investigated by the degradation of methylene blue (MB) under the irradiation of simulated sunlight. The as-prepared g-C 3 N 4 /BiFeO 3 composites exhibit remarkable enhanced photocatalytic activity compared with bare BiFeO 3 . More importantly, the photocataltic performance of the composites is further confirmed by the degradation of colorless phenol. Furthermore, the favorable catalytic stability of composites is demonstrated through the recycling photocatalytic experiment. The enhanced photocatalytic activity of g-C 3 N 4 /BiFeO 3 composites is mainly attributed to the separation of the photogenerated electron-hole pairs, resulting from the migration of the photoinduced charge between g-C 3 N 4 nanoparticles and BiFeO 3 . A possible photocatalytic mechanism for dye degradation over g-C 3 N 4 /BiFeO 3 composite is proposed based on the active species trapping experiment, revealing that the photogenerated hole (h + ) and hydrogen peroxide (H 2 O 2 ) are regarded as the major active species for the decomposition of dye, while hydroxyl radicals (•OH) plays a minor role in the photocatalytic reaction.

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“…with other cations, including alkaline ions (Li + , Na + , K + , Rb + , Cs + ) [20], transition (Co 2+ , Ni 2+ , Fe 3+ , Cu 2+ , Zn 2+ , Cd 2+ ) [20,26,27] and noble metals (Au, Pt, Pd, Ru, Ag) [28,29]. Along with the iron titanate nanotubes, the literature is moderately limited [9,21,26,27,[30][31][32][33][34][35][36][37][38]. Attention has been focused on the electrochemistry [32,38], photocatalysis [31,33,36,37], molecular segregation [27], optical and magnetic properties [21,26,27,31,33] of Fe-titanates.…”

Section: Introductionmentioning

confidence: 99%

“…Along with the iron titanate nanotubes, the literature is moderately limited [9,21,26,27,[30][31][32][33][34][35][36][37][38]. Attention has been focused on the electrochemistry [32,38], photocatalysis [31,33,36,37], molecular segregation [27], optical and magnetic properties [21,26,27,31,33] of Fe-titanates. Notwithstanding research and development efforts into the properties of Fe-titanate nanotubes, including the intrinsic ability of iron when present in titanate nanotubes in building carbon domains via catalytic decomposition from light carbon feedstocks, have not been widely explored so far.…”

Section: Introductionmentioning

confidence: 99%

Interplay between Fe-Titanate Nanotube Fragmentation and Catalytic Decomposition of C2H4: Formation of C/TiO2 Hybrid Interfaces

et al. 2018

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This paper reports the synthesis of Fe-titanate nanotubes by means of the conventional ion-exchange method with iron nitrate solutions. As the iron-rich nanotubes were found to contain the catalyst precursor intrinsically dispersed in their structures, the unprecedented possibility of using this kind of materials for building carbon nanostructures, firmly attached at the surface of the forming TiO 2 nanoparticles, was verified. The catalytic decomposition of ethylene, used as a carbon source, was performed at a relatively high temperature (750 • C) when the nanotubes undergo an irreversible phase transformation to form anatase and rutile nanoparticles. Due to the different amounts of Fe ions in the nanotubes, distinct types of carbon/TiO 2 hybrid interfaces were formed, ranging from amorphous (lower Fe 3+ concentration) to the more crystalline graphitic domains (higher Fe 3+ concentrations), as documented by the microstructure of the treated samples. The present approach is of potential interest for (photo)catalytic and energy conversion/transport applications.

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Photocatalytic Performance of Titanates with Formula MTiO3 (M= Fe, Ni, and Co) Synthesized by Solvo-Combustion Method

Cited by 28 publications

References 33 publications

Graphene Oxide Functionalized with Cationic Porphyrins as Materials for the Photodegradation of Rhodamine B

Graphene Oxide Functionalized with Cationic Porphyrins as Materials for the Photodegradation of Rhodamine B

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

Interplay between Fe-Titanate Nanotube Fragmentation and Catalytic Decomposition of C2H4: Formation of C/TiO2 Hybrid Interfaces

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