Microstructure, magnetic properties, corrosion resistance and catalytic activity of dual-phase AlCoNiFeTi and AlCoNiFeTiSi high entropy alloys

Łoński, Wojciech; Spilka, M.; Kądziołka-Gaweł, Mariola; Gębara, P.; Radoń, Adrian; Warski, Tymon; Łoński, Sylwester; Barbusiński, K.; Młynarek-Żak, K.; Babilas, R.

doi:10.1016/j.jallcom.2022.167827

Cited by 17 publications

(7 citation statements)

References 71 publications

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“…The initial pH = 7 has not been modified, because the addition of SP no effect on its value [18]. Due to the lack of publications on the degradation of dyes using quasicrystals, the authors used the experience gained while working with high entropy alloys [18] regarding the adoption of the concentration of SP and quasicrystals (8.3; 16.7; 33.3 g/l and 8.3; 16.7; 33.3 g/l, respectively). The UV/Na 2 CO 3 1.5H 2 O 2 process without the addition of quasicrystals was used as a comparative reaction.…”

Section: Photocatalytic Experimentsmentioning

confidence: 99%

“…There are numerous variations of the Fenton reaction. Catalysing iron can be supplied in a variety of forms, including metallic [12][13][14], nanoparticle [15,16], amorphous alloys [17], and high entropy alloys [18].…”

Section: Introductionmentioning

confidence: 99%

“…Further modifications of the classic Fenton reaction are the methods of supplying the oxidant and the method of supplying the possible light. Hydrogen peroxide [15,16] and sodium percarbonate [18,20,21] are just two examples of the numerous oxidants that can be used to carry out the reaction. Light, of which there are many different kinds, from UV light [15,16,18,21] to sunlight [22], may catalyse the process even further.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen peroxide [15,16] and sodium percarbonate [18,20,21] are just two examples of the numerous oxidants that can be used to carry out the reaction. Light, of which there are many different kinds, from UV light [15,16,18,21] to sunlight [22], may catalyse the process even further. In these studies, it was decided to use sodium percarbonate Na 2 CO 3 1.5H 2 O 2 (SP) as the alternative source of H 2 O 2 in the Fenton reaction and UV light to catalyse this process.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Łoński

Babilas

et al. 2023

Architecture, Civil Engineering, Environment

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A novel photocatalytic process using a modification of photo-Fenton reaction, with sodium percarbonate (SP), as an alternative source of H2O2, and alloy Al65Cu20Fe15 containing, among others, quasicrystals (of the percentage composition Al65Cu20Fe15), being a source of iron ions, effectively decolourizes the aqueous solution of rhodamine B (RB; solution of 5 mg/l). The source of UV radiation was a lamp with a power of 36 W. The experiments were carried out at pH = 7 and reaction time (from 5 to 60 min). The increase in SP concentration (in the range of 8.3 to 33.3 g/l) significantly increased the degree of degradation of RB and the reaction rate. However, the use of quasicrystals, in the range of 8.3 to 33.3 g/l, was also important in the modified photocatalytic photo-Fenton process. The best degradation effects of RB (95%) were obtained for the highest SP concentration of 33.3 g/l and the lowest quasicrystal concentration of 8.3 g/l. On the other hand, visual decolourization of RB was obtained with an efficiency of 70% for SP and quasicrystal concentrations of 16.7 g/l and 16.7 g/l, respectively, after 45 minutes, and for SP and quasicrystal concentrations of 33.3 g/l and 8.3 g/l, respectively, after the time of 20 minutes. The best RB degradation effects in the comparative method (UV/Na2CO3·1.5H2O2 without the addition of quasicrystals) were only 52.7%. The obtained results encourage further research to optimize the conditions of the proposed method and to investigate its applicability to other types of dyes and pollutants.

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Section: Photocatalytic Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Łoński

Babilas

et al. 2023

Architecture, Civil Engineering, Environment

Self Cite

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“…These HEA have been investigated for, e.g., their mechanical (see Refs. [21][22][23][24]), catalytic [25][26][27][28], photocatalytic [29][30][31][32], and refractory [33][34][35][36] properties. To date, over 350 reviews have been published on HEAs various properties [37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

2022

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Thermoelectric materials have attracted extensive attention because they can directly convert waste heat into electric energy. As a brand-new method of alloying, high-entropy alloys (HEAs) have attracted much attention in the fields of materials science and engineering. Recent researches have found that HEAs could be potentially good thermoelectric (TE) materials. In this study, special quasi-random structures (SQS) of PbSnTeSe high-entropy alloys consisting of 64 atoms have been generated. The thermoelectric transport properties of the highest-entropy PbSnTeSe-optimized structure were investigated by combining calculations from first-principles density-functional theory and on-the-fly machine learning with the semiclassical Boltzmann transport theory and Green–Kubo theory. The results demonstrate that PbSnTeSe HEA has a very low lattice thermal conductivity. The electrical conductivity, thermal electronic conductivity and Seebeck coefficient have been evaluated for both n-type and p-type doping. N-type PbSnTeSe exhibits better power factor (PF = S2σ) than p-type PbSnTeSe because of larger electrical conductivity for n-type doping. Despite high electrical thermal conductivities, the calculated ZT are satisfactory. The maximum ZT (about 1.1) is found at 500 K for n-type doping. These results confirm that PbSnTeSe HEA is a promising thermoelectric material.

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Nanostructuring of AlSiCrMnFeNiCu High‐Entropy Alloy via Cryomilling: Exploring Structural, Magnetic, and Thermoelectric Properties

Shadangi,

Sherpa,

Jain

et al. 2024

Adv Eng Mater

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Efforts are made to understand the influence of milling intensity on structure, morphology, magnetic and thermoelectric properties of nonequiatomic nanostructured AlSiCrMnFeNiCu high‐entropy alloy (HEA) powders prepared by cryomilling. These powders are cryomilled with different ball‐to‐powder ratios (BPR) and present a dual‐phase structure containing a major B2‐type and a minor Cr5Si3‐type phase. An increase in BPR enhances the refinement of crystallite size, grain size, and particle size accompanied by a decrease in the phase fraction of the minor Cr5Si3‐type phase. Magnetic measurements revealed that at room temperature, sufficient increase in BPR leads to a transition from multi‐domain behavior to single‐domain behavior which leads to enhancement in soft magnetic properties. Thermal measurements show the presence of different magnetic phase transitions which vary with an increase in BPR. A change of charge carrier type from p to n‐type was observed as the grain size is reduced. The figure of merit decreases with the decrease in grain size from 2 × 10–5 for as‐cast powders and is lowest for the smallest grain‐sized sample due to a decrease in electrical conductivity. This study shows the possibility of exploring nonequiatomic low‐density HEAs whose functional properties can be tailored, offering flexibility in material design for specific applications.

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Microstructure, magnetic properties, corrosion resistance and catalytic activity of dual-phase AlCoNiFeTi and AlCoNiFeTiSi high entropy alloys

Cited by 17 publications

References 71 publications

Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

Nanostructuring of AlSiCrMnFeNiCu High‐Entropy Alloy via Cryomilling: Exploring Structural, Magnetic, and Thermoelectric Properties

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