Novel synthesis method for photo-catalytic system based on some 3d-metal titanates

Absalan, Yahya; Bratchikova, I. G.; Лобанов, Н. Н.; Kovalchukova, O. V.

doi:10.1007/s10854-017-7769-6

Cited by 11 publications

(5 citation statements)

References 67 publications

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“…The perovskites that possess inherent dipole moment due the non-centrosymmetric metal center, are advantageous, particularly, to improve the separation of photogenerated charge carriers due to localized electric field developed, is the most crucial phenomena that govern the overall efficiency of the redox reactions, as most of the photogenerated charge carriers approximately (80 %) are lost by recombination, rather than participating in the water splitting redox reactions. [4] A variety of perovskites have shown great potential for hydrogen generation via either a photocatalytic or photoelectrochemical pathway, e. g., CaTiO 3 , [5] CoTiO 3 , [6][7][8][9] FeTiO 3 , [10] CrTiO 3 [10] etc. However, these perovskite catalysts suffer from various limitations that includes low surface area, rapid recombination of the charge species among others.…”

Section: Introductionmentioning

confidence: 99%

“…A variety of perovskites have shown great potential for hydrogen generation via either a photocatalytic or photoelectrochemical pathway, e. g., CaTiO 3 , [5] CoTiO 3 , [6–9] FeTiO 3 , [10] CrTiO 3 [10] etc. However, these perovskite catalysts suffer from various limitations that includes low surface area, rapid recombination of the charge species among others.…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

Moses,

Bastia,

Kumar

et al. 2023

ChemistrySelect

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Modification of nickel titanate nanocubes with metal nanocrystals is a viable approach to build a Schottky heterojunction for efficient hydrogen generation. The deconvoluted XPS spectrum of Pt 4 f (peaks at 72.0 and 75.5 eV corresponding to Pt° and Pt2+) and Pd 3d3/2 (335.4 and 336.7 eV corresponding to Pd° and Pd2+) and presence of lattice fringes in HRTEM at 2.19 Å of Pd°, reveal the formation of heterojunction in Pd−NiTiO3 and Pt−NiTiO3 nanocubes. The solar hydrogen generation investigation exhibits 2‐fold enhancement in HER (130 and 165 μmol g−1 h−1 while using Pt−NiTiO3 and Pd−NiTiO3, respectively) than that of bare NiTiO3 (88 μmol g−1 h−1). The creation of heterojunctions between titanates and metal nanoparticles, facilitating efficient transport of photo‐generated electron to empty or partially filled d or f orbitals of metals, thereby lowering electron‐hole recombination rate, as revealed by shorter average lifetime 29 ns (Pd−NiTiO3) than 64 ns (NiTiO3). Further, the unison of faster charge transfer kinetics as revealed by the Nyquist plot, more negative flatband potential (Efb −0.3 vs. RHE) leading to appropriate band bending, reduced overpotential requirement, higher oxygen vacancies (19.46 %) and uniform dispersion of metal atoms on NiTiO3 surfaces that are acting as trapping centers etc. are enabling improved hydrogen generation in the case of Pd−NiTiO3.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

Moses,

Bastia,

Kumar

et al. 2023

ChemistrySelect

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“…This system is only activated by UV light, which has limited its application. This limitation can be resolved by modifying a TiO 2 nano-photocatalyst for instance through doping [14,15], grafting [16], solid solution, semiconductor coupling, floatability amelioration, immobilization and magnetic separation [17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TiC@C-anatase/rutile@polyvinyl alcohol/xylan: a powerful photocatalyst for degradation of organic pollutant under visible light

et al. 2022

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In this study, a composite bearing titanium carbide (TiC), titanium dioxide (TiO 2 ), polyvinyl alcohol and xylan (TiC@C-anatase/rutile@polyvinyl alcohol/xylan) was synthesized and applied as a photocatalyst for the degradation of bromophenol blue (BPB) solution through several steps. Nanostructure of TiC and TiO 2 in the anatase and rutile phases was obtained through heat treatment of TiC at different times and temperatures (TiC@AR) which led to a reduction in energy bandgap from UV to visible light, in addition to the enhancement of the surface activity. After TiC@AR polymerization by xylan and polyvinyl alcohol and obtaining TiC@AR/PX, the energy bandgap reduced to IR range (52% of the sunlight) while showing an enhancement in the surface activity. The photocatalytic activity of the compounds was tested by studying the decomposition of BPB solution under visible light. The result illustrated the ability of TiC and TiC@AR to decrease the concentration of BPB after 150 min by 35% and 37%, respectively, while this reduction was 72% for TiC@AR/PX. Considering the effective parameters, the energy bandgap and the surface layer played key roles in photocatalytic degradation.

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“…The photocatalytic oxidation of alcohols to their corresponding aldehydes has attracted a great deal of interest in several fields of chemistry [18][19][20][21][22][23][24][25]. This is because of the importance of aldehydes in various chemical usages, including drugs, dyes, resins and fragrances [26].…”

Section: Introductionmentioning

confidence: 99%

The Complex Compound of Amino Acids With Titanium (III) as a Method to Control and Synthesis of Different Structures of TiO2 Nanoparticles; Usage as Photocatalysts to Oxidize Alcohols to Aldehyde

Absalan

Shad

Gholizadeh

2021

Preprint

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Different types of the amino acids (Glutamine, Glycine, Alanine) were used to coordinate TiCl3 in order to investigating the best precursor for synthesis of TiO2. Also, a full investigation was carried out to synthesis four different structures of TiO2 nanoparticles [TiO2 (A0.8R0.2), TiO2 (A0.6R0.4), TiO2 (Anatase), and TiO2 (Rutile)]. Oxidation of derivatives alcohol to their corresponding aldehyde through the obtained nanoparticles, as a photocatalyst, under UV light was considered to investigate the best structure of TiO2. Different physical-chemical analyses were applied to investigate the result. The result showed that the titanium dioxide nanoparticle, synthesized from glycine was obtained at the least temperature and was chosen as a precursor to synthesis of four different types of TiO2. All the synthesized TiO2 were applied for oxidation of benzyl alcohols into benzaldehyde, as a test, and TiO2 (A0.6R0.4) could give the best result (87% efficiency). Then it was used to oxidize benzyl alcohol, 4-cholorobenzyl alcohol, 4-nitrobenzyl alcohol and 4-methoxybenzyl alcohol to their corresponding aldehyde and efficiency were 74, 92, 87, and 65% respectively.

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Novel synthesis method for photo-catalytic system based on some 3d-metal titanates

Cited by 11 publications

References 67 publications

Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

Synthesis of TiC@C-anatase/rutile@polyvinyl alcohol/xylan: a powerful photocatalyst for degradation of organic pollutant under visible light

The Complex Compound of Amino Acids With Titanium (III) as a Method to Control and Synthesis of Different Structures of TiO2 Nanoparticles; Usage as Photocatalysts to Oxidize Alcohols to Aldehyde

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