Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application
Green synthesis of metal oxide nanoparticles is a cost-effective and sustainable approach that allows tailoring of the size and shape of the nanostructures for versatile applications. In this study, aloe vera extract-assisted sol-gel synthesis of nickel oxide nanoparticles (NiOx NPs) was explored fo...
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my.uniten.dspace-367152025-03-03T15:44:07Z Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application Selvanathan V. Islam M.A. Kiong T.S. Razali S.A. Alharbi H.F. Akhtaruzzaman M. 57160057200 57361246600 57216824752 57225826234 57188221000 57195441001 Calcination Capacitance Cost effectiveness Crystallite size Energy storage Metal nanoparticles Nickel oxide Sol-gel process Sol-gels Storage (materials) Synthesis (chemical) Aloe vera Calcination temperature Charge storage Energy Green synthesis Nanopyramids Nickel oxide nanoparticle Sol - Gel synthesis Supercapacitor application Synthesised Supercapacitor Green synthesis of metal oxide nanoparticles is a cost-effective and sustainable approach that allows tailoring of the size and shape of the nanostructures for versatile applications. In this study, aloe vera extract-assisted sol-gel synthesis of nickel oxide nanoparticles (NiOx NPs) was explored for supercapacitor application. The NiOx NPs were synthesized at different aloe vera concentrations (2.5 and 5 wt%) and calcination temperatures (300, 400 and 500 �C). The phytochemical-assisted synthesis yielded NiOx nanopyramids with pores on their surface which widens as calcination temperature increases. As confirmed by XRD analysis, NiOx crystallite size also increased at higher calcination temperatures. Upon electrochemical characterization, NiOx-400B which was synthesized with 5 wt% aloe vera extract at 400 �C recorded the highest specific capacitance of 721 F g?1 at 1 A g-1 current density with the energy and power density of 10.38 Whkg?1 and 241.08 W kg-1 respectively. The charge storage mechanisms in the samples were gauged using Dunn's method which revealed that NiOx synthesized at higher calcination temperatures exhibited a greater contribution of the diffusion-controlled process. The optimized composition, NiOx-400B, also demonstrated excellent cycle stability by retaining up to 90.4 % of its original capacitance over 1500 cycles. This work is an attempt to investigate the viability of green synthesized nanoparticles in energy storage applications and the novel NiOx nanopyramid substantiates its prospect as a good electrode material for supercapacitors. ? 2024 Elsevier Ltd and Techna Group S.r.l. Final 2025-03-03T07:44:07Z 2025-03-03T07:44:07Z 2024 Article 10.1016/j.ceramint.2023.12.400 2-s2.0-85182346106 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85182346106&doi=10.1016%2fj.ceramint.2023.12.400&partnerID=40&md5=2b07fbcf225d4a3eadef44c03d4fac13 https://irepository.uniten.edu.my/handle/123456789/36715 50 7 10843 10853 Elsevier Ltd Scopus |
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Calcination Capacitance Cost effectiveness Crystallite size Energy storage Metal nanoparticles Nickel oxide Sol-gel process Sol-gels Storage (materials) Synthesis (chemical) Aloe vera Calcination temperature Charge storage Energy Green synthesis Nanopyramids Nickel oxide nanoparticle Sol - Gel synthesis Supercapacitor application Synthesised Supercapacitor |
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Calcination Capacitance Cost effectiveness Crystallite size Energy storage Metal nanoparticles Nickel oxide Sol-gel process Sol-gels Storage (materials) Synthesis (chemical) Aloe vera Calcination temperature Charge storage Energy Green synthesis Nanopyramids Nickel oxide nanoparticle Sol - Gel synthesis Supercapacitor application Synthesised Supercapacitor Selvanathan V. Islam M.A. Kiong T.S. Razali S.A. Alharbi H.F. Akhtaruzzaman M. Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application |
| description |
Green synthesis of metal oxide nanoparticles is a cost-effective and sustainable approach that allows tailoring of the size and shape of the nanostructures for versatile applications. In this study, aloe vera extract-assisted sol-gel synthesis of nickel oxide nanoparticles (NiOx NPs) was explored for supercapacitor application. The NiOx NPs were synthesized at different aloe vera concentrations (2.5 and 5 wt%) and calcination temperatures (300, 400 and 500 �C). The phytochemical-assisted synthesis yielded NiOx nanopyramids with pores on their surface which widens as calcination temperature increases. As confirmed by XRD analysis, NiOx crystallite size also increased at higher calcination temperatures. Upon electrochemical characterization, NiOx-400B which was synthesized with 5 wt% aloe vera extract at 400 �C recorded the highest specific capacitance of 721 F g?1 at 1 A g-1 current density with the energy and power density of 10.38 Whkg?1 and 241.08 W kg-1 respectively. The charge storage mechanisms in the samples were gauged using Dunn's method which revealed that NiOx synthesized at higher calcination temperatures exhibited a greater contribution of the diffusion-controlled process. The optimized composition, NiOx-400B, also demonstrated excellent cycle stability by retaining up to 90.4 % of its original capacitance over 1500 cycles. This work is an attempt to investigate the viability of green synthesized nanoparticles in energy storage applications and the novel NiOx nanopyramid substantiates its prospect as a good electrode material for supercapacitors. ? 2024 Elsevier Ltd and Techna Group S.r.l. |
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57160057200 |
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57160057200 Selvanathan V. Islam M.A. Kiong T.S. Razali S.A. Alharbi H.F. Akhtaruzzaman M. |
| format |
Article |
| author |
Selvanathan V. Islam M.A. Kiong T.S. Razali S.A. Alharbi H.F. Akhtaruzzaman M. |
| author_sort |
Selvanathan V. |
| title |
Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application |
| title_short |
Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application |
| title_full |
Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application |
| title_fullStr |
Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application |
| title_full_unstemmed |
Aloe vera extract-assisted sol-gel synthesis of NiOx nanopyramids for supercapacitor application |
| title_sort |
aloe vera extract-assisted sol-gel synthesis of niox nanopyramids for supercapacitor application |
| publisher |
Elsevier Ltd |
| publishDate |
2025 |
| _version_ |
1825816071964196864 |
| score |
13.244413 |