Influence of preparation method on the structural, linear, and nonlinear optical properties of TiN nanoparticles

Safa, Mahdi; Rajabi, Yasser; Ardyanian, M.

doi:10.1007/s10854-021-06463-8

Cited by 6 publications

(6 citation statements)

References 55 publications

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“…Large band gap narrowing of Cu 2 O/CuO-decorated TiO 2 /graphene oxide nanocomposites: TC1, 2.90 eV, TC2, 2.94 eV, TC3, 2.86 eV, TC1-GO, 2.75 eV, TC2-GO, 2.56 eV, TC3-GO, and 2.76 eV as compared to pure TiO2, 3.2 eV reported previously [ 9 ] may explain their enhanced electron transfer capacity.…”

Section: Resultssupporting

confidence: 57%

“…As a result of TiO 2 decoration with Cu 2 O and CuO species (identified by XPS in the previous study [ 9 ]), a lower PL intensity of TC1, TC2, and TC3 was observed, indicating an efficient charge–carrier separation. This finding is in good agreement with the data reported by M. Janczarek and E. Kowalska in their comprehensive review that presents the Cu 2 O and CuO as active species in TiO 2 photocatalytic system being efficient electron trappers to prevent the recombination of the photogenerated electron–hole pairs [ 19 ].…”

Section: Resultsmentioning

confidence: 84%

“…The optical absorption performance in the visible region could be enhanced by adding copper oxides and graphene oxide (GO) to TiO 2 nanoparticles [ 6 , 7 ]. Various methods of obtaining TiO 2 and GO based nanocomposites and their optical and photocatalytic properties extensive characterization are reported [ 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Luminescence, Paramagnetic, and Electrochemical Properties of Copper Oxides-Decorated TiO2/Graphene Oxide Nanocomposites

Bala

Matei

Ioniţă

et al. 2022

IJMS

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The properties of newly synthesized Cu2O/CuO-decorated TiO2/graphene oxide (GO) nanocomposites (NC) were analyzed aiming to obtain insight into their photocatalytic behavior and their various applications, including water remediation, self-cleaning surfaces, antibacterial materials, and electrochemical sensors. The physico-chemical methods of research were photoluminescence (PL), electron paramagnetic resonance (EPR) spectroscopy, cyclic voltammetry (CV), and differential pulse voltammetry (DPV). The solid samples evidenced an EPR signal that can be attributed to the oxygen-vacancy defects and copper ions in correlation with PL results. Free radicals generated before and after UV-Vis irradiation of powders and aqueous dispersions of Cu2O/CuO-decorated TiO2/GO nanocomposites were studied by EPR spectroscopy using two spin traps, DMPO (5,5-dimethyl-1-pyrroline-N-oxide) and CPH (1-hydroxy-3-carboxy-2,2,5,5-tetramethylpyrrolidine), to highlight the formation of hydroxyl and superoxide reactive oxygen species, respectively. The electrochemical characterization of the NC modified carbon-paste electrodes (CPE) was carried out by CV and DPV. As such, modified carbon-paste electrodes were prepared by mixing carbon paste with copper oxides-decorated TiO2/GO nanocomposites. We have shown that GO reduces the recombination process in TiO2 by immediate electron transfer from excited TiO2 to GO sheets. The results suggest that differences in the PL, respectively, EPR data and electrochemical behavior, are due to the different copper oxides and GO content, presenting new perspectives of materials functionalization.

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Section: Resultssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Luminescence, Paramagnetic, and Electrochemical Properties of Copper Oxides-Decorated TiO2/Graphene Oxide Nanocomposites

Bala

Matei

Ioniţă

et al. 2022

IJMS

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“…The resulting highly crystalline TiN with a thickness of 60 nm was prepared within a short time and was more scalable and economical as compared to other methods of synthesis. Mahdi Safa and his team compared different nanosized TiN nanoparticles prepared using the ball milling, sol-gel, and co-precipitation methods [ 77 ]. In both co-precipitation and sol-gel methods, the resulting material synthesized using these processes were directly annealed in the ammonia atmosphere for 5 h at 1000°C to obtain TiN nanoparticles.…”

Section: Synthesis Of Mnsmentioning

confidence: 99%

Metal nitride-based nanostructures for electrochemical and photocatalytic hydrogen production

Gujral

Singh

Baskar

et al. 2022

Science and Technology of Advanced Materials

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The over-dependence on fossil fuels is one of the critical issues to be addressed for combating greenhouse gas emissions. Hydrogen, one of the promising alternatives to fossil fuels, is renewable, carbon-free, and non-polluting gas. The complete utilization of hydrogen in every sector ranging from small to large scale could hugely benefit in mitigating climate change. One of the key aspects of the hydrogen sector is its production via cost-effective and safe ways. Electrolysis and photocatalysis are well-known processes for hydrogen production and their efficiency relies on electrocatalysts, which are generally noble metals. The usage of noble metals as catalysts makes these processes costly and their scarcity is also a limiting factor. Metal nitrides and their porous counterparts have drawn considerable attention from researchers due to their good promise for hydrogen production. Their properties such as active metal centres, nitrogen functionalities, and porous features such as surface area, pore-volume, and tunable pore size could play an important role in electrochemical and photocatalytic hydrogen production. This review focuses on the recent developments in metal nitrides from their synthesis methods point of view. Much attention is given to the emergence of new synthesis techniques, methods, and processes of synthesizing the metal nitride nanostructures. The applications of electrochemical and photocatalytic hydrogen production are summarized. Overall, this review will provide useful information to researchers working in the field of metal nitrides and their application for hydrogen production.

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“…Therefore, the fabrication method should be carefully chosen. 23 Additionally, the size and shape of nanoparticles (NPs) also strongly affect the resulting optical properties. Hence, to ensure efficient optical absorption, it is important optimize their size and shape to achieve the best absorption at the wavelength of the excitation light that is used.…”

Section: Introductionmentioning

confidence: 99%

High Photothermal Conversion of Ball-Milled Titanium Nitride Nanoparticles: Evaluation of Size and Amorphous Effect

Sakamoto

Akashi

Hotta

et al. 2022

ACS Appl. Eng. Mater.

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Gold, one of the most commonly studied plasmonic nanomaterials, has a high thermal conversion efficiency. However, its high cost, low thermal durability, and complicated synthesis procedures prevent its application on a large scale. To address these issues, cost-effective, inert metal nitrides such as titanium nitride (TiN) can be considered as alternative materials. TiN has high thermal stability and exhibits metallic properties at visible wavelengths. In this study, TiN nanoparticles (NPs) were prepared using a facile ball milling method suitable for large-scale production. The time and rotational speed of the ball mill were varied to evaluate the effect of particle size and the amorphous content of TiN NPs on the photothermal properties under white light. Moreover, the effects of particle size and the amorphous content on photoheating were evaluated by measuring the increase in temperature of a dispersive TiN NP solution exposed to a white light-emitting diode (LED) source. We found that TiN NPs with a diameter of approximately 100 nm exhibited a maximum temperature increase of 52.5 °C, which was in agreement with the theoretical calculations. The theoretical calculations were conducted on the basis of Mie theory under conditions identical to those used in the experiment. The best photothermal conversion efficiency was obtained using 100 nm TiN NPs prepared by milling at a high rotational speed (600 rpm) for a short time (0.5 h). In addition, experimental and theoretical analyses confirmed that an increasingly amorphous TiN structure impeded the photoheating of the dispersive TiN NP solution. The results of this research have potential implications for indoor environmental heating systems, including heating a room with TiN-embedded walls or floors or distilling water using only visible-light energy.

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Influence of preparation method on the structural, linear, and nonlinear optical properties of TiN nanoparticles

Cited by 6 publications

References 55 publications

Luminescence, Paramagnetic, and Electrochemical Properties of Copper Oxides-Decorated TiO2/Graphene Oxide Nanocomposites

Luminescence, Paramagnetic, and Electrochemical Properties of Copper Oxides-Decorated TiO2/Graphene Oxide Nanocomposites

Metal nitride-based nanostructures for electrochemical and photocatalytic hydrogen production

High Photothermal Conversion of Ball-Milled Titanium Nitride Nanoparticles: Evaluation of Size and Amorphous Effect

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