The performance of different types of flower-like zinc oxide for photocatalytic desulfurization of synthetic thiophene
Zinc oxide (ZnO) nanoparticles have received great attention due to their advantages. Several improvements on the morphology of ZnO have been widely studied to solve the problem of agglomeration and surface-active sites. To date, there are limited studies involving the effect of flower-like Zn...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English English English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/8277/1/24p%20MOHAMAD%20ALIF%20HAKIMI%20HAMDAN.pdf http://eprints.uthm.edu.my/8277/2/MOHAMAD%20ALIF%20HAKIMI%20HAMDAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/8277/3/MOHAMAD%20ALIF%20HAKIMI%20HAMDAN%20WATERMARK.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Zinc oxide (ZnO) nanoparticles have received great attention due to their advantages.
Several improvements on the morphology of ZnO have been widely studied to solve
the problem of agglomeration and surface-active sites. To date, there are limited
studies involving the effect of flower-like ZnO in the application of thiophene
desulfurization via photocatalysis process. Thus, this study focuses on the performance
of different flower-like ZnO for synthetic thiophene desulfurization. Eight ZnO
photocatalyst species were synthesised and categorized into two groups, namely
flower-like ZnO and non-flower-like ZnO. The physical properties of all the ZnO
morphologies were analysed. Moreover, their performances for desulfurization of
synthetic thiophene were evaluated. From the findings, flower-like ZnO flakes showed
the highest performance in synthetic thiophene desulfurization (30%). Higher pH (pH
11) and turbidity reduction (32%) of the permeate indicated the higher generation of
hydroxyl radicals causing higher desulfurization of thiophene. From the kinetic study,
all ZnO morphologies were applicable with pseudo-second-order models due to higher
linear regression (R2
) values. The highest concentration equilibrium, Ce value for
flower-like ZnO flakes (909.09 mg/g) confirmed greater desulfurization of thiophene.
Moreover, it was found that pH 7 in the presence of 0.05 g/L flower-like ZnO flakes
for 90 minutes of irradiation were the best conditions and yield the highest
desulfurization of 300 ppm synthetic thiophene (30%) due to the highest generation of
hydroxyl radical. It is expected that this integrated approach could bring forward other
initiative methods in overcoming the problems in petroleum industry related to
desulfurization of sulphur-containing compounds. |
|---|