Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ
Thermochemical conversion of plastic wastes into carbon nanotubes (CNTs) and hydrogen is a promising management option to eliminate their hazardous effect. The yields and morphologies of CNTs strongly depend on the catalyst design and reaction conditions. To boost the efficiency, tuning of bimetalli...
| Κύριοι συγγραφείς: | , , , |
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| Άλλοι συγγραφείς: | |
| Μορφή: | Journal Article |
| Γλώσσα: | English |
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2022
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| Θέματα: | |
| Διαθέσιμο Online: | https://hdl.handle.net/10356/159658 |
| _version_ | 1826127303250280448 |
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| author | Jia, Jingbo Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Jia, Jingbo Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz |
| author_sort | Jia, Jingbo |
| collection | NTU |
| description | Thermochemical conversion of plastic wastes into carbon nanotubes (CNTs) and hydrogen is a promising management option to eliminate their hazardous effect. The yields and morphologies of CNTs strongly depend on the catalyst design and reaction conditions. To boost the efficiency, tuning of bimetallic nanoparticles as catalyst is an effective approach. For that reason, A-site-deficient perovskite La0·8Ni1-xCoxO3-δ (LN1-xCx, x = 0.15, 0.5, 0.85) was developed and used as a catalyst precursor to achieve in situ formation of bimetallic Ni-Co nanoparticles. At an optimized Ni-to-Co ratio, the LN0.5C0.5 exhibited the highest yields of multi-walled CNTs, namely 840 and 853 mg/gcatalyst from high density polyethylene and polypropylene, respectively. This could be attributed to the higher catalytic capability of LN0.5C0.5 catalyst for the decomposition of hydrocarbons into hydrogen and carbon. In both cases, multi-walled CNTs had regular shapes when the reaction temperature was 700 °C. At higher reaction temperatures, the morphological changes of carbon products were observed from multi-walled CNTs to carbon nano-onions. The Raman spectra showed that compared with the commercial multi-walled CNTs, the as-prepared multi-walled CNTs had a lower degree of defects. |
| first_indexed | 2024-10-01T07:06:42Z |
| format | Journal Article |
| id | ntu-10356/159658 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:06:42Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1596582022-06-28T08:11:26Z Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ Jia, Jingbo Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Environmental engineering Plastics Upcycling Multi-Walled Carbon Nanotubes Thermochemical conversion of plastic wastes into carbon nanotubes (CNTs) and hydrogen is a promising management option to eliminate their hazardous effect. The yields and morphologies of CNTs strongly depend on the catalyst design and reaction conditions. To boost the efficiency, tuning of bimetallic nanoparticles as catalyst is an effective approach. For that reason, A-site-deficient perovskite La0·8Ni1-xCoxO3-δ (LN1-xCx, x = 0.15, 0.5, 0.85) was developed and used as a catalyst precursor to achieve in situ formation of bimetallic Ni-Co nanoparticles. At an optimized Ni-to-Co ratio, the LN0.5C0.5 exhibited the highest yields of multi-walled CNTs, namely 840 and 853 mg/gcatalyst from high density polyethylene and polypropylene, respectively. This could be attributed to the higher catalytic capability of LN0.5C0.5 catalyst for the decomposition of hydrocarbons into hydrogen and carbon. In both cases, multi-walled CNTs had regular shapes when the reaction temperature was 700 °C. At higher reaction temperatures, the morphological changes of carbon products were observed from multi-walled CNTs to carbon nano-onions. The Raman spectra showed that compared with the commercial multi-walled CNTs, the as-prepared multi-walled CNTs had a lower degree of defects. This work was supported by the Beijing Natural Science Foundation (8204065); the National Natural Science Foundation of China (No. 21908128); the Fundamental Research Funds for the Central Universities (JD2117). 2022-06-28T08:11:25Z 2022-06-28T08:11:25Z 2022 Journal Article Jia, J., Veksha, A., Lim, T. & Lisak, G. (2022). Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ. Chemosphere, 291 Pt 2, 132831-. https://dx.doi.org/10.1016/j.chemosphere.2021.132831 0045-6535 https://hdl.handle.net/10356/159658 10.1016/j.chemosphere.2021.132831 34767850 2-s2.0-85118747063 291 Pt 2 132831 en Chemosphere © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Plastics Upcycling Multi-Walled Carbon Nanotubes Jia, Jingbo Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ |
| title | Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ |
| title_full | Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ |
| title_fullStr | Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ |
| title_full_unstemmed | Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ |
| title_short | Temperature-dependent synthesis of multi-walled carbon nanotubes and hydrogen from plastic waste over A-site-deficient perovskite La₀.₈Ni₁-ₓCoₓO₃-δ |
| title_sort | temperature dependent synthesis of multi walled carbon nanotubes and hydrogen from plastic waste over a site deficient perovskite la₀ ₈ni₁ ₓcoₓo₃ δ |
| topic | Engineering::Environmental engineering Plastics Upcycling Multi-Walled Carbon Nanotubes |
| url | https://hdl.handle.net/10356/159658 |
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