Facile synthesis of highly thermally stable TiO<sub>2</sub> photocatalysts

Mezni, Amine; Saber, Nesrine Ben; Ibrahim, Mohamed M.; El‐Kemary, Maged; Aldalbahi, Ali; Feng, Peter; Smiri, Leila Samia; Altalhi, Tariq

doi:10.1039/c7nj00747g

Cited by 49 publications

(26 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to the SEM image of ZnO NPs, Figure 7A, it can be noted that the average particle size of the ZnO/TiO 2 hybrid nanomaterial (~55 nm) is bigger than that of ZnO (~30 nm) alone. These findings indicate that ZnO NPs are firmly attached to the NPs of TiO 2 , taking into consideration, based on our previous study, 70 that the size of TiO 2 NPs prepared in DMSO was ~15 nm. The elemental distribution of ZnO/TiO 2 was assessed by the elemental mapping of Zn, O, and Ti, as shown in the three SEM images collected in Figure 8E.…”

Section: Resultssupporting

confidence: 75%

Crystalline ZnO and ZnO / TiO ₂ nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H ₂ generation in alkaline electrolytes

et al. 2020

Self Cite

View full text Add to dashboard Cite

Summary A newly synthesized zinc(II) complex, namely tert‐butyl N‐(2 mercaptoethyl)carbamatozinc(II) complex [Zn(Boc‐S)2] (Boc = tert‐butyl N‐[2‐mercaptoethyl]carbamate), has been used as an organozinc precursor for the production of crystalline ZnO and ZnO/TiO2 nanoparticles. The synthesized complex and the obtained nanomaterials were fully characterized using various spectroscopic and surface analysis techniques. Their surface morphology, chemical purity and stoichiometry have been investigated by scanning electron microscopy (SEM), energy dispersive X‐ray analysis (EDX) as well as X‐ray fluorescence. The synthesized Zn(II) molecular complex, ZnO and ZnO/TiO2 nanomaterials have been tested in alkaline aqueous solution (1.0 MNaOH) for the hydrogen evolution reaction (HER) using various electrochemical techniques. The results revealed high HER catalytic performance of ZnO and ZnO/TiO2 cathode materials, with the latter exhibiting higher catalytic activity recording an exchange current density (jo) of 0.3 mA cm−2. This current value, which approaches that of Pt wire (0.5 mA cm−2), cross‐sectional area ~0.008 cm2, is about 11 and 100 times greater than those measured for ZnO alone (0.028 mA cm−2) and TiO2 alone (0.0032 mA cm−2), respectively. Moderate catalytic activity was recorded for the complex catalyst, namely GC‐Zn(Boc‐S)2 with jo value of (0.01 mA cm−2). Tafel slope values of 130 and 122 mV dec−1 were calculated for ZnO and ZnO/TiO2, respectively. Such Tafel slope values, which are close to that of the Pt wire (120 mV dec−1), referred to a Volmer‐controlled HER kinetics. Other important electrochemical parameters describing the kinetics of the HER, such as roughness factor (Rf) and turnover frequency (TOF) were also estimated and discussed. The high numerical values of the various HER kinetic parameters recorded for the ZnO/TiO2 catalyst, in addition to its high stability and durability (stable for up to 10 000 continuous cathodic polarization cycles), besides maintaining its morphology and chemical composition after stability test (confirmed from SEM/EDX and XRD examinations), located it in a privileged position among the most efficient HER electrocatalysts reported in the literature.

show abstract

Section: Resultssupporting

confidence: 75%

Crystalline ZnO and ZnO / TiO ₂ nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H ₂ generation in alkaline electrolytes

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The interest derives from a synthesis that can be easily achieved in the laboratory at low temperature, without heavy metals and dangerous reagents; this kind of approach, in our opinion, does not emerge from the literature. We focused on some manuscripts from 2017 [ 26 , 27 , 28 ], which while being close to our needs do not fully meet our requirements.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of TiO2 Nanoparticles for the Reduction of Water Pollutants

Lusvardi

Barani²,

Giubertoni³

et al. 2017

Materials

View full text Add to dashboard Cite

The aim of this manuscript was the optimization of the synthesis of TiO2 nanoparticles (TiO2 NPs) with conditions that could be easily reproducible at the industrial level. Several procedures were tested and those with C12H28O4Ti and CO(NH2)2 as precursors seemed the most promising and, consequently, were improved with different molar ratios, lower temperatures and the addition of NH4Cl as a secondary dopant of nitrogen. The obtained samples were studied with analytical techniques such as X-ray powder diffraction (XRPD) and field emission scanning electron microscopy (FESEM). To complete the study, dye degradation and bacteriological tests were also performed. The results indicate that it is possible to obtain TiO2 NPs at lower temperatures with respect to those used in the literature; the best candidate that could satisfy all the requirements was a sample with a molar ratio of C12H28O4Ti:CO(NH2)2 at 2:1 and obtained at 50 °C.

show abstract

“…The TiO2-Gd1.0 and TiO2-Gd6.0 NPs were prepared following a previously reported method [9][10][11][12][13][14]. Briefly, titanium (IV) tert-butoxide (5.0 mL) was added to gadolinium(II) nitrate hexahydrate with two different atomic concentrations (1.0. and 6.0%) in DMSO (50 mL).…”

Section: Synthesis Of Gd 3+ -Doped Tio2 Npsmentioning

confidence: 99%

“…The reaction of titanium(IV) tert-butoxide in presence of gadolinium(III) nitrate hexahydrate in boiling DMSO as solvent and oxidizing agent [9] produces the Gd 3+ Ti(OH)4 monomer. These hydroxide monomers were then reacted with the dimethyl sulfoxonium cation [18], which evolved from the degradation of DMSO molecules deposited at the surfaces of Gd 3+ -doped TiO2 NPs.…”

Section: Structural Analysismentioning

confidence: 99%

Enhanced Acidic Hydrogen Evolution on TiO2-Doped Gadolinium Electrocatalysts

Alsawat

2020

J. Nanosci. Tech.

View full text Add to dashboard Cite

Gadolinium-doped TiO2 NPs, namely TiO2-Gd1.0 and TiO2-Gd6.0 have been synthesized using two different atomic concentrations of gadolinium(III) nitrate hexahydrate in presence of titanium(IV) tert-butoxide as a titanium precursor and dimethyl sulfoxide as a solvent. The structure and morphology of these NPs have been characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TGA-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The two synthesized TiO2-Gd1.0 and TiO2-Gd6.0 were tested as electrocatalysts for hydrogen evolution reaction (HER) in an acidic electrolyte (0.5 M H2SO4) based on linear sweep voltammetry (LSV) measurements. LSV data were fitted to Tafel equation and the various electrochemical parameters describing the HER kinetics were evaluated and discussed. Results demonstrate that the kinetics of the HER on the surface of TiO2 NPs significantly enhanced upon doping it with Gd3+, proportionally to the atomic concentration of the Gd3+ cations in the TiO2 NPs.

show abstract

Facile synthesis of highly thermally stable TiO₂ photocatalysts

Abstract: Synthesis of titanium dioxide (TiO2) nanoparticles by a new one-pot solvothermal process.

Cited by 49 publications

References 22 publications

Crystalline ZnO and ZnO / TiO ₂ nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H ₂ generation in alkaline electrolytes

Crystalline ZnO and ZnO / TiO ₂ nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H ₂ generation in alkaline electrolytes

Synthesis and Characterization of TiO2 Nanoparticles for the Reduction of Water Pollutants

Enhanced Acidic Hydrogen Evolution on TiO2-Doped Gadolinium Electrocatalysts

Contact Info

Product

Resources

About

Facile synthesis of highly thermally stable TiO2 photocatalysts

Abstract: Synthesis of titanium dioxide (TiO2) nanoparticles by a new one-pot solvothermal process.

Cited by 49 publications

References 22 publications

Crystalline ZnO and ZnO / TiO 2 nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H 2 generation in alkaline electrolytes

Crystalline ZnO and ZnO / TiO 2 nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H 2 generation in alkaline electrolytes

Synthesis and Characterization of TiO2 Nanoparticles for the Reduction of Water Pollutants

Enhanced Acidic Hydrogen Evolution on TiO2-Doped Gadolinium Electrocatalysts

Contact Info

Product

Resources

About

Facile synthesis of highly thermally stable TiO₂ photocatalysts

Crystalline ZnO and ZnO / TiO ₂ nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H ₂ generation in alkaline electrolytes

Crystalline ZnO and ZnO / TiO ₂ nanoparticles derived from tert ‐butyl N‐(2 mercaptoethyl)carbamatozinc( II ) chelate: Electrocatalytic studies for H ₂ generation in alkaline electrolytes