Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach
<p dir="ltr">This paper investigates the influence of incorporating Eocene Midra Shale (EMS), consisting of 1D palygorskite and 2D irregular dolomite flakes, on the thermoelectric properties of an n-type Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , |
| منشور في: |
2025
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| الموضوعات: | |
| الوسوم: |
إضافة وسم
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| _version_ | 1864513534147166208 |
|---|---|
| author | Farah M. El-Makaty (14157090) |
| author2 | Manal M. Alsalama (22497152) Wael S. Matter (22497155) Khaled M. Youssef (14157099) |
| author2_role | author author author |
| author_facet | Farah M. El-Makaty (14157090) Manal M. Alsalama (22497152) Wael S. Matter (22497155) Khaled M. Youssef (14157099) |
| author_role | author |
| dc.creator.none.fl_str_mv | Farah M. El-Makaty (14157090) Manal M. Alsalama (22497152) Wael S. Matter (22497155) Khaled M. Youssef (14157099) |
| dc.date.none.fl_str_mv | 2025-10-15T15:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.jallcom.2025.184348 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Enhanced_thermoelectric_properties_of_Bi_sub_2_sub_Te_sub_2_55_sub_Se_sub_0_45_sub_nanocomposites_using_eco-friendly_Eocene_Midra_Shale_palygorskite_nanofillers_A_sustainable_approach/30447410 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Chemical engineering Materials engineering Nanotechnology Thermoelectric N-type Mechanical milling Hot pressing Bismuth telluride |
| dc.title.none.fl_str_mv | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">This paper investigates the influence of incorporating Eocene Midra Shale (EMS), consisting of 1D palygorskite and 2D irregular dolomite flakes, on the thermoelectric properties of an n-type Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> alloy. The EMS was obtained from one of Qatar’s substantial hydrocarbon reservoirs and mixed with the Bi2Te2.55Se0.45 alloy using ball-milling and hot-pressing techniques. Different wt% of EMS (0.025, 0.05, 0.1, 0.5, and 1) were considered. TEM analysis of the composite samples revealed the incorporation of palygorskite fibers within the Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> particles, while dolomite nanoflakes were observed at the boundaries. The distinct effects of the present minerals were evident in the thermoelectric properties of the EMS-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> composites. Incorporating a small quantity of EMS (0.05 wt%) has enhanced the electrical conductivity of the samples relative to the pristine ones, demonstrating the effectiveness of palygorskite nanofibers in facilitating charge carrier transport. However, adding higher amounts (0.1, 0.5, and 1) decreased the electrical and thermal conductivities due to the dominant effect of bulky precipitates in increasing the scattering of charge carriers and phonons. The calculated ZT profile showed that EMS can improve the thermoelectric properties only when added in small amounts of 0.05 wt%. The figure-of-merit of the 0.05 wt% sample reached 0.89 at 150 °C, resulting in 19 % improvements compared to the pristine Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> pellet measured at the same temperature. This performance surpassed both the pristine sample and reference nanocomposites with graphene and MXene. These results highlight EMS as a low-cost, natural nanofiller with strong potential for scalable thermoelectric applications.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Alloys and Compounds<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.jallcom.2025.184348" target="_blank">https://dx.doi.org/10.1016/j.jallcom.2025.184348</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_231112e5556d93df9f3dae5481c532ca |
| identifier_str_mv | 10.1016/j.jallcom.2025.184348 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/30447410 |
| publishDate | 2025 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approachFarah M. El-Makaty (14157090)Manal M. Alsalama (22497152)Wael S. Matter (22497155)Khaled M. Youssef (14157099)EngineeringChemical engineeringMaterials engineeringNanotechnologyThermoelectricN-typeMechanical millingHot pressingBismuth telluride<p dir="ltr">This paper investigates the influence of incorporating Eocene Midra Shale (EMS), consisting of 1D palygorskite and 2D irregular dolomite flakes, on the thermoelectric properties of an n-type Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> alloy. The EMS was obtained from one of Qatar’s substantial hydrocarbon reservoirs and mixed with the Bi2Te2.55Se0.45 alloy using ball-milling and hot-pressing techniques. Different wt% of EMS (0.025, 0.05, 0.1, 0.5, and 1) were considered. TEM analysis of the composite samples revealed the incorporation of palygorskite fibers within the Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> particles, while dolomite nanoflakes were observed at the boundaries. The distinct effects of the present minerals were evident in the thermoelectric properties of the EMS-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> composites. Incorporating a small quantity of EMS (0.05 wt%) has enhanced the electrical conductivity of the samples relative to the pristine ones, demonstrating the effectiveness of palygorskite nanofibers in facilitating charge carrier transport. However, adding higher amounts (0.1, 0.5, and 1) decreased the electrical and thermal conductivities due to the dominant effect of bulky precipitates in increasing the scattering of charge carriers and phonons. The calculated ZT profile showed that EMS can improve the thermoelectric properties only when added in small amounts of 0.05 wt%. The figure-of-merit of the 0.05 wt% sample reached 0.89 at 150 °C, resulting in 19 % improvements compared to the pristine Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> pellet measured at the same temperature. This performance surpassed both the pristine sample and reference nanocomposites with graphene and MXene. These results highlight EMS as a low-cost, natural nanofiller with strong potential for scalable thermoelectric applications.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Alloys and Compounds<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.jallcom.2025.184348" target="_blank">https://dx.doi.org/10.1016/j.jallcom.2025.184348</a></p>2025-10-15T15:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.jallcom.2025.184348https://figshare.com/articles/journal_contribution/Enhanced_thermoelectric_properties_of_Bi_sub_2_sub_Te_sub_2_55_sub_Se_sub_0_45_sub_nanocomposites_using_eco-friendly_Eocene_Midra_Shale_palygorskite_nanofillers_A_sustainable_approach/30447410CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/304474102025-10-15T15:00:00Z |
| spellingShingle | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach Farah M. El-Makaty (14157090) Engineering Chemical engineering Materials engineering Nanotechnology Thermoelectric N-type Mechanical milling Hot pressing Bismuth telluride |
| status_str | publishedVersion |
| title | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| title_full | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| title_fullStr | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| title_full_unstemmed | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| title_short | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| title_sort | Enhanced thermoelectric properties of Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposites using eco-friendly Eocene Midra Shale palygorskite nanofillers: A sustainable approach |
| topic | Engineering Chemical engineering Materials engineering Nanotechnology Thermoelectric N-type Mechanical milling Hot pressing Bismuth telluride |