Effects of different Sn contents on formation of Ti2SnC by self-propagating high-temperature synthesis method in Ti-Sn-C and Ti-Sn-C-TiC systems

Sun, Hong; Kong, Xin Ying; Sen, Wei; Yi, Zhen; Wang, Baosen; Liu, Guiyang

doi:10.2478/s13536-014-0252-7

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…As shown in Fig. 1 c, the original Sn@Ti 2 SnC MAX shows a plate-like structure [ 43 ]. In addition, according to the mapping and energy-dispersive spectrometer (EDS) results of Sn@Ti 2 SnC (Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Green Ammonia Electrosynthesis Through Tuning Sn Vacancies in Sn-Based MXene/MAX Hybrids

Dai,

Du,

Sun

et al. 2024

Nano-Micro Lett.

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Renewable energy driven N2 electroreduction with air as nitrogen source holds great promise for realizing scalable green ammonia production. However, relevant out-lab research is still in its infancy. Herein, a novel Sn-based MXene/MAX hybrid with abundant Sn vacancies, Sn@Ti2CTX/Ti2SnC–V, was synthesized by controlled etching Sn@Ti2SnC MAX phase and demonstrated as an efficient electrocatalyst for electrocatalytic N2 reduction. Due to the synergistic effect of MXene/MAX heterostructure, the existence of Sn vacancies and the highly dispersed Sn active sites, the obtained Sn@Ti2CTX/Ti2SnC–V exhibits an optimal NH3 yield of 28.4 µg h−1 mgcat−1 with an excellent FE of 15.57% at − 0.4 V versus reversible hydrogen electrode in 0.1 M Na2SO4, as well as an ultra-long durability. Noticeably, this catalyst represents a satisfactory NH3 yield rate of 10.53 µg h−1 mg−1 in the home-made simulation device, where commercial electrochemical photovoltaic cell was employed as power source, air and ultrapure water as feed stock. The as-proposed strategy represents great potential toward ammonia production in terms of financial cost according to the systematic technical economic analysis. This work is of significance for large-scale green ammonia production.

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Section: Resultsmentioning

confidence: 99%

Enhancing Green Ammonia Electrosynthesis Through Tuning Sn Vacancies in Sn-Based MXene/MAX Hybrids

Dai,

Du,

Sun

et al. 2024

Nano-Micro Lett.

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“…The etchant concentration, however, was much higher than the 10% HF reported by Gogotsi et al The synthesis using 10% HF was not reproducible in our environment, and the MXene yield from the reaction was not significant. The resulting HF-MXene (Figure S2) also shows the absence of the distinct peak at 19.8°, but the remaining peaks could be indexed as a cubic TiC phase (PDF 32-1383). , This shows that HF-MXene was overetched, which results in an inseparable mixture of Ti 3 C 2 T x and TiC, that is challenging to purify, highlighting the main drawback of this approach, along with chemical safety concern over using a hazardous etchant. The bonding structure in the MILD-synthesized MXene is consistent with the previously reported works using Raman spectroscopy with peaks present at 200, 630, and 730 cm –1 , as shown in Figure b .…”

Section: Resultsmentioning

confidence: 99%

MXene Nanosheets Functionalized with Cu Atoms for Urea Adsorption in Aqueous Media

Yen,

Salim,

Boothroyd

et al. 2023

ACS Appl. Nano Mater.

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Ti3C2T x MXene is an emerging family of two-dimensional materials, and because of its large specific surface area, it has the potential for many applications. Herein, a new application using Cu-doped MILD (minimally intensive layer delamination)-synthesized Ti3C2T x MXene for urea removal is demonstrated. The doping of Cu on MXene results in an increase in its affinity for urea adsorption as compared to pristine MILD-synthesized MXene due to the formation of the Cu–urea complex. Previous computational studies have shown that the adsorption energies of urea on the MXene surface can be improved in the presence of Cu. The valence state of Cu in doped MILD-synthesized MXene, which binds onto the surface via a Ti–O–Cu linkage, is between 0 and +1, as verified by XAS and XPS. As the optimal urea adsorption occurs on Cu as a single-atom site, an increase in Cu doping on MXene does not increase urea removal due to Cu agglomeration. Looking at the adsorption behavior, it seems that Cu-doped MXene follows the monolayer adsorption on a homogeneous surface model.

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“…Results in Fig. 10 show the XRD patterns that, besides the broad peaks represented by the α phase of titanium with a hexagonal close-packed (hcp) lattice at 35.2°, 38.5° and 40.5° (Pushilina et al, 2018), for the specimens of N=16, 32 after laser irradiation, the peaks around 36.1° and 41.9° have risen, corresponding to the TiC (111) and TiC (200) (Sun et al, 2014;Li et al, 2006), respectively. It indicates the hard titanium carbide layer can also be formed after the laser scanning irradiation under the conditions of high pulse number N. Hence, it is considered that under conditions of N=2-8 the surface modification is mainly due to the laser hardening effect, while for high pulse numbers it is the combined effects of laser quenching and surface carbonization.…”

Section: Surface Modification and Investigation Of Tribological Prope...mentioning

confidence: 99%

Surface modification technique of titanium alloy to improve the tribological properties using sub-ns laser irradiation in PAO oil

LIU

TANAKA

Fujiwara

et al. 2023

JAMDSM

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Titanium alloy is widely used in different industrial applications. For the surface modification to improve the tribological properties, laser irradiation is a promising technology, which offers high efficiency, and high automation potential and geometrical flexibility. In this study, a novel method of surface modification for titanium alloys by carbonization using low fluence of laser irradiation in the atmosphere of PAO oil is proposed. Results show that the carbon content on the surfaces significantly increases with the laser shot number, with the laser irradiated spot showing little change of Ra. XPS analysis confirms that the carbon from the oil has bonded to the Titanium inside the alloy. By comparison with that irradiated without oil, the hardness of that irradiated in oil is much higher, demonstrating the feasibility of the surface modification of titanium carbide layer generation. To investigate the tribological properties, laser scanning irradiation in oil with different laser pulses were carried out to create laser modified areas and reciprocating ball-on-disk friction tests under oil lubrication were conducted. The laser modified areas show friction of 0.13, much lower than that of the unirradiated which is approximate 0.55, and the sliding lifetime of low friction is also increased with the laser pulse number. Moreover, by introducing patterning laser irradiation onto the uniformly irradiated area, the wear resistance can be further greatly improved, and the sliding lifetime can extend to 13 times of the optimal result of uniform irradiation.

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Effects of different Sn contents on formation of Ti2SnC by self-propagating high-temperature synthesis method in Ti-Sn-C and Ti-Sn-C-TiC systems

Cited by 7 publications

References 16 publications

Enhancing Green Ammonia Electrosynthesis Through Tuning Sn Vacancies in Sn-Based MXene/MAX Hybrids

Enhancing Green Ammonia Electrosynthesis Through Tuning Sn Vacancies in Sn-Based MXene/MAX Hybrids

MXene Nanosheets Functionalized with Cu Atoms for Urea Adsorption in Aqueous Media

Surface modification technique of titanium alloy to improve the tribological properties using sub-ns laser irradiation in PAO oil

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