Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites
This research included studying and preparing the complex [Zn(DMB)Cl]2 from the reaction 1 M ratio of 2,6-dimethoxybenzoic acid ligand (DMB) with one molar ratio of aqueous zinc chloride in the presence of triethylamine. This complex was diagnosed by several techniques including FT-IR, 1H NMR, eleme...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221171562300187X |
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| author | Atyaf M. Alazawi Modher Y. Mohammed Mustafa A. Alheety Shankar Sehgal Pramod K. Singh |
| author_facet | Atyaf M. Alazawi Modher Y. Mohammed Mustafa A. Alheety Shankar Sehgal Pramod K. Singh |
| author_sort | Atyaf M. Alazawi |
| collection | DOAJ |
| description | This research included studying and preparing the complex [Zn(DMB)Cl]2 from the reaction 1 M ratio of 2,6-dimethoxybenzoic acid ligand (DMB) with one molar ratio of aqueous zinc chloride in the presence of triethylamine. This complex was diagnosed by several techniques including FT-IR, 1H NMR, elemental analysis and molar conductivity. The MWCNTS-ZnO composite was prepared by reacting the complex [Zn(DMB)Cl]2 with carbon nanotubes using an ultrasound device. The novelty of this work is mainly based on the use of zinc acetate and [Zn(DMB)Cl]2 in the preparation of MWCNTS-ZnO(acetate) and MWCNTS-ZnO(complex) nanocomposites, respectively, in order to determine the importance of raw materials and their effects on the ability to store hydrogen. Thereafter, hydrogen storage was measured as a prospective study of the MWCNTS-ZnO composites. The study proves that the maximum H2 storage was 4.3 wt% H2 using MWCNTS-ZnO(complex) at a pressure of 85 bar and a temperature of 77 K. Therefore, the kinetic and thermodynamic calculations were made for this composite to complete the study. The enthalpy value was 0.8771 KJ/(mol H2), the entropy value was 4.7029 (J/mol H2.K), and the separation factor RF was 0.168148. However, the adsorption process was compatible with the pseudo-second order reaction with a value of R2 = 0.9341. Moreover, the measurement shows that the nanocomposite has the ability to reach the highest storage value in only 30 s at a pressure of 85 bar. |
| first_indexed | 2024-03-13T04:12:37Z |
| format | Article |
| id | doaj.art-83f3128b30164db79e310199fea6039d |
| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-03-13T04:12:37Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-83f3128b30164db79e310199fea6039d2023-06-21T06:52:41ZengElsevierResults in Chemistry2211-71562023-01-015100948Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocompositesAtyaf M. Alazawi0Modher Y. Mohammed1Mustafa A. Alheety2Shankar Sehgal3Pramod K. Singh4Department of Chemistry, College of Education for Women, Tikrit University, Tikrit, IraqDepartment of Chemistry, College of Education for Women, Tikrit University, Tikrit, IraqDepartment of Nursing, Al-Hadi University College, Baghdad, Iraq; Corresponding author.Mechanical Engineering, University Institute of Engineering and Technology, Panjab University, Chandigarh 160014, IndiaCenter of Solar Cells and Renewable Energy, Department of Physics, Sharda University, Greater Noida 201310, IndiaThis research included studying and preparing the complex [Zn(DMB)Cl]2 from the reaction 1 M ratio of 2,6-dimethoxybenzoic acid ligand (DMB) with one molar ratio of aqueous zinc chloride in the presence of triethylamine. This complex was diagnosed by several techniques including FT-IR, 1H NMR, elemental analysis and molar conductivity. The MWCNTS-ZnO composite was prepared by reacting the complex [Zn(DMB)Cl]2 with carbon nanotubes using an ultrasound device. The novelty of this work is mainly based on the use of zinc acetate and [Zn(DMB)Cl]2 in the preparation of MWCNTS-ZnO(acetate) and MWCNTS-ZnO(complex) nanocomposites, respectively, in order to determine the importance of raw materials and their effects on the ability to store hydrogen. Thereafter, hydrogen storage was measured as a prospective study of the MWCNTS-ZnO composites. The study proves that the maximum H2 storage was 4.3 wt% H2 using MWCNTS-ZnO(complex) at a pressure of 85 bar and a temperature of 77 K. Therefore, the kinetic and thermodynamic calculations were made for this composite to complete the study. The enthalpy value was 0.8771 KJ/(mol H2), the entropy value was 4.7029 (J/mol H2.K), and the separation factor RF was 0.168148. However, the adsorption process was compatible with the pseudo-second order reaction with a value of R2 = 0.9341. Moreover, the measurement shows that the nanocomposite has the ability to reach the highest storage value in only 30 s at a pressure of 85 bar.http://www.sciencedirect.com/science/article/pii/S221171562300187XHydrogen storageZn complex2,6-DimethoxybenzoicacidMWCNTsNanocomposite |
| spellingShingle | Atyaf M. Alazawi Modher Y. Mohammed Mustafa A. Alheety Shankar Sehgal Pramod K. Singh Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites Results in Chemistry Hydrogen storage Zn complex 2,6-Dimethoxybenzoicacid MWCNTs Nanocomposite |
| title | Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites |
| title_full | Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites |
| title_fullStr | Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites |
| title_full_unstemmed | Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites |
| title_short | Effect of Zn precursors on hydrogen storage in MWCNTs-ZnO nanocomposites |
| title_sort | effect of zn precursors on hydrogen storage in mwcnts zno nanocomposites |
| topic | Hydrogen storage Zn complex 2,6-Dimethoxybenzoicacid MWCNTs Nanocomposite |
| url | http://www.sciencedirect.com/science/article/pii/S221171562300187X |
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