Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst
The intense rise of wastes production in the industrial field due to rapid industrialization had brought more concern and interest in the development of wastewater treatment technologies in the country. The aim of this study is to synthesize simple, high efficiency and environment-friendly photoc...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/69115/ http://psasir.upm.edu.my/id/eprint/69115/7/FS%202016%2041%20IR%20edit.pdf |
| _version_ | 1848867642875576320 |
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| author | Wan, Tze Peng |
| author_facet | Wan, Tze Peng |
| author_sort | Wan, Tze Peng |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The intense rise of wastes production in the industrial field due to rapid
industrialization had brought more concern and interest in the development of
wastewater treatment technologies in the country. The aim of this study is to
synthesize simple, high efficiency and environment-friendly photocatalyst with easy
and affordable photodegradation experiments in degrading dye. In this study, a series
of bismuth(III) vanadate (BiVO4) photocatalysts were prepared via precipitation
method and a series of Cu-loaded BiVO4 (Cu-BiVO4) photocatalysts were prepared
via impregnation method.
XRD analysis showed that tetragonal phase of BiVO4 was formed during
precipitation process and the phase transformation from tetragonal to monoclinic
phase of BiVO4 was completed at temperature 450 °C after 4 hours of calcination in
air. The crystallite size of the synthesized photocatalysts ranging from 25.8 to 51.1
nm. The synthesized photocatalysts were spherical in shape, as observed in FESEM
images, with surface area from 0.2 to 0.8 m2g-1. The particle size of the
photocatalysts obtained via TEM, was in the range of 34.1 to 60.6 nm. Result from
UV/Vis DRS indicated that band gap energy of BiVO4 had increased due to copper
loading. The presence of copper in the Cu-BiVO4 photocatalysts was justified by
result of AAS.
Photocatalytic degradation efficiency of the BiVO4 and Cu-BiVO4 photocatalysts
was evaluated by degrading methylene blue (MB) dye under visible-light irradiation.
The optimum conditions of the photocatalytic degradation were based on parameters.
Among the undoped BiVO4 photocatalyst, sample calcined at 550 °C for 1 hour
demonstrated the highest photocatalytic degradation efficiency. Highest removal
percentage of MB dye solution at initial concentration of 10 ppm and initial pH at 8, was achieved by loading 1.0 g of BiVO4 in the photocatalytic degradation
experiment, under 18W fluorescent light irradiation at room temperature.
The photocatalytic degradation efficiency of BiVO4 photocatalyst was enhanced by
doping copper (Cu). 1 wt% Cu-BiVO4 was found to exhibit the highest
photocatalytic degradation efficiency. The percentage removal of MB dye solution at
initial concentration of 10 ppm and initial pH at 10, approached 99.57%, when 0.8 g
of 1 wt% Cu-BiVO4 was loaded in the photocatalytic degradation experiment, under
18W fluorescent light irradiation at room temperature. The photocatalytic
degradation of MB dye in this study followed first order kinetics. |
| first_indexed | 2025-11-15T11:39:43Z |
| format | Thesis |
| id | upm-69115 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:39:45Z |
| publishDate | 2016 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-691152025-10-10T03:47:19Z http://psasir.upm.edu.my/id/eprint/69115/ Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst Wan, Tze Peng The intense rise of wastes production in the industrial field due to rapid industrialization had brought more concern and interest in the development of wastewater treatment technologies in the country. The aim of this study is to synthesize simple, high efficiency and environment-friendly photocatalyst with easy and affordable photodegradation experiments in degrading dye. In this study, a series of bismuth(III) vanadate (BiVO4) photocatalysts were prepared via precipitation method and a series of Cu-loaded BiVO4 (Cu-BiVO4) photocatalysts were prepared via impregnation method. XRD analysis showed that tetragonal phase of BiVO4 was formed during precipitation process and the phase transformation from tetragonal to monoclinic phase of BiVO4 was completed at temperature 450 °C after 4 hours of calcination in air. The crystallite size of the synthesized photocatalysts ranging from 25.8 to 51.1 nm. The synthesized photocatalysts were spherical in shape, as observed in FESEM images, with surface area from 0.2 to 0.8 m2g-1. The particle size of the photocatalysts obtained via TEM, was in the range of 34.1 to 60.6 nm. Result from UV/Vis DRS indicated that band gap energy of BiVO4 had increased due to copper loading. The presence of copper in the Cu-BiVO4 photocatalysts was justified by result of AAS. Photocatalytic degradation efficiency of the BiVO4 and Cu-BiVO4 photocatalysts was evaluated by degrading methylene blue (MB) dye under visible-light irradiation. The optimum conditions of the photocatalytic degradation were based on parameters. Among the undoped BiVO4 photocatalyst, sample calcined at 550 °C for 1 hour demonstrated the highest photocatalytic degradation efficiency. Highest removal percentage of MB dye solution at initial concentration of 10 ppm and initial pH at 8, was achieved by loading 1.0 g of BiVO4 in the photocatalytic degradation experiment, under 18W fluorescent light irradiation at room temperature. The photocatalytic degradation efficiency of BiVO4 photocatalyst was enhanced by doping copper (Cu). 1 wt% Cu-BiVO4 was found to exhibit the highest photocatalytic degradation efficiency. The percentage removal of MB dye solution at initial concentration of 10 ppm and initial pH at 10, approached 99.57%, when 0.8 g of 1 wt% Cu-BiVO4 was loaded in the photocatalytic degradation experiment, under 18W fluorescent light irradiation at room temperature. The photocatalytic degradation of MB dye in this study followed first order kinetics. 2016-03 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/69115/7/FS%202016%2041%20IR%20edit.pdf Wan, Tze Peng (2016) Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst. Masters thesis, Universiti Putra Malaysia. http://ethesis.upm.edu.my/id/eprint/11102/ Bismuth Copper-bismuth alloys Photocatalysis |
| spellingShingle | Bismuth Copper-bismuth alloys Photocatalysis Wan, Tze Peng Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| title | Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| title_full | Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| title_fullStr | Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| title_full_unstemmed | Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| title_short | Synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| title_sort | synthesis, characterization and performance of visible light active copper-loaded bismuth vanadate photocatalyst |
| topic | Bismuth Copper-bismuth alloys Photocatalysis |
| url | http://psasir.upm.edu.my/id/eprint/69115/ http://psasir.upm.edu.my/id/eprint/69115/ http://psasir.upm.edu.my/id/eprint/69115/7/FS%202016%2041%20IR%20edit.pdf |