Mass production of Carbon Nanotubes from waste cooking palm oil via modified thermal chemical vapor deposition and its application
This study is aimed to synthesize carbon nanotubes (CNTs) for the large scaleproduction (in term of high volume production around 500 mg per day) by utilizing the novel wastecooking palm oil (WCPO) as carbon feedstock. The method used were modified thermal chemical vapordeposition (TCVD) that equipp...
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| Format: | thesis |
| Language: | eng |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://ir.upsi.edu.my/detailsg.php?det=6790 |
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| Summary: | This study is aimed to synthesize carbon nanotubes (CNTs) for the large scaleproduction (in term of high volume production around 500 mg per day) by utilizing the novel wastecooking palm oil (WCPO) as carbon feedstock. The method used were modified thermal chemical vapordeposition (TCVD) that equipped with a peristaltic sprayer in order to continuously supplythe precursor and catalyst into the system. Various synthesis parameters, such as effect ofvaporization and synthesis temperature, synthesis time interval, precursor flow rate, postannealing treatment, nozzle diameter, and catalyst concentration were conducted in order to findout the optimum parameter to produce high quantity and good quality of CNTs. The totalamount of 1000 ml WCPO precursor was sprayed continuously during the experiment with ferroceneas catalyst via modified TCVD system. The samples were characterized using field emissionscanning electron microscopy, energy dispersive X-ray, high resolution transmissionelectron microscopy, micro-Raman spectroscopy and thermogravimetric analysis. The optimumsamples were then used as nanofiller for supercapacitor application and as an adsorbentmaterial for adsorption heavy metal ions application. The findings showed that the total of~433 g CNTs were produced with high carbon conversion rate of 56 %. Growth of dense CNTswith a high purity of ~90 % and good crystallinity (ID/IG ratio ~0.43) occurredat combination temperature of 500 and 800 C of vaporization and synthesis temperature,respectively, time interval between spraying process of 15 min, precursor flow rate of 30 mLmin?,annealing treatment at 500 C for 4 h, nozzle diameter of 0.25 mm and catalystconcentration of 5.33 wt% using modified TCVD system. The CNTs/natural rubber-latex (NRL) nanocomposite exhibited a good capacitance performance with a specific capacitance of81.82 F/g. Meanwhile, CNTs from WCPO shows an excellent ability in order to remove heavy metal ionfrom aqueous solutions which match well with the Langmuir isotherm model with higher correlationcoefficient and maximum adsorption capacity metal ions of 0.9894 and 31.25 mg/g,respectively. In conclusion, this study determined that a high production of WCPO based-CNTs usingmodified TCVD method provided benefits for its utilization as composite and adsorbent materialsespecially for supercapacitor and adsorption of heavy metal ions application. The implicationof this study is used a simple method, economical and green approach in order to produceshigher productionand good quality of CNTs. |
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