High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure
Abstract The enhancement of the photocatalytic performance of pristine WO3 was systematically adjusted due to its fast recombination rate and low reduction potential. A designed heterostructure photocatalyst was necessarily synthesised by Fe3+ metal ions doping into WO3 structure with and compositio...
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| Format: | Article |
| Language: | English |
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Springer
2024-01-01
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| Series: | Discover Nano |
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| Online Access: | https://doi.org/10.1186/s11671-023-03919-0 |
| _version_ | 1797273541476876288 |
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| author | Natkritta Boonprakob Duangdao Channei Chen Zhao |
| author_facet | Natkritta Boonprakob Duangdao Channei Chen Zhao |
| author_sort | Natkritta Boonprakob |
| collection | DOAJ |
| description | Abstract The enhancement of the photocatalytic performance of pristine WO3 was systematically adjusted due to its fast recombination rate and low reduction potential. A designed heterostructure photocatalyst was necessarily synthesised by Fe3+ metal ions doping into WO3 structure with and composition modification. In this study, we synthesised a retrievable Fe-doped WO3/SiO2 heterostructure using a surfactant-assisted hydrothermal method. This heterostructure was then employed as an effective photocatalyst for the removal of Cr(VI) under visible light irradiation. Enlarged photocatalytic reduction was observed over a synergetic 7.5 mol% Fe-doped WO3/SiO2-20 nanocomposite, resulting in dramatically increased activity compared with undoped WO3 and SiO2 nanomaterials under visible light illumination within 90 min. The presence of 7.5 mol% Fe3+ ion dopant in WO3 optimised electron–hole recombination, consequently reducing WO3 photocorrosion. After adding SiO2 nanoparticles, the binary WO3-SiO2 nanocomposite played roles as both adsorbent and photocatalyst to increase specific surface area. Thus, the 7.5 mol% Fe-doped WO3/SiO2-20 nanocomposite catalyst had more active sites on the surface of catalyst, and enhanced photocatalytic reduction was significantly achieved. The results showed 91.1% photocatalytic reduction over the optimum photocatalyst, with a photoreduction kinetic rate of 21.1 × 10–3 min−1, which was approximately four times faster than pristine WO3. Therefore, the superior optimal photocatalyst demonstrated reusability, with activities decreasing by only 9.8% after five cycles. The high photocatalytic performance and excellent stability of our photocatalyst indicate great potential for water pollution treatments. |
| first_indexed | 2024-03-07T14:45:51Z |
| format | Article |
| id | doaj.art-96fc52e7be55402eac4f67b818a0356c |
| institution | Directory Open Access Journal |
| issn | 2731-9229 |
| language | English |
| last_indexed | 2024-03-07T14:45:51Z |
| publishDate | 2024-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Discover Nano |
| spelling | doaj.art-96fc52e7be55402eac4f67b818a0356c2024-03-05T20:02:00ZengSpringerDiscover Nano2731-92292024-01-0119112010.1186/s11671-023-03919-0High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructureNatkritta Boonprakob0Duangdao Channei1Chen Zhao2Program of Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat UniversityDepartment of Chemistry, Faculty of Science, Naresuan UniversitySchool of Materials and Energy, Guangdong University of TechnologyAbstract The enhancement of the photocatalytic performance of pristine WO3 was systematically adjusted due to its fast recombination rate and low reduction potential. A designed heterostructure photocatalyst was necessarily synthesised by Fe3+ metal ions doping into WO3 structure with and composition modification. In this study, we synthesised a retrievable Fe-doped WO3/SiO2 heterostructure using a surfactant-assisted hydrothermal method. This heterostructure was then employed as an effective photocatalyst for the removal of Cr(VI) under visible light irradiation. Enlarged photocatalytic reduction was observed over a synergetic 7.5 mol% Fe-doped WO3/SiO2-20 nanocomposite, resulting in dramatically increased activity compared with undoped WO3 and SiO2 nanomaterials under visible light illumination within 90 min. The presence of 7.5 mol% Fe3+ ion dopant in WO3 optimised electron–hole recombination, consequently reducing WO3 photocorrosion. After adding SiO2 nanoparticles, the binary WO3-SiO2 nanocomposite played roles as both adsorbent and photocatalyst to increase specific surface area. Thus, the 7.5 mol% Fe-doped WO3/SiO2-20 nanocomposite catalyst had more active sites on the surface of catalyst, and enhanced photocatalytic reduction was significantly achieved. The results showed 91.1% photocatalytic reduction over the optimum photocatalyst, with a photoreduction kinetic rate of 21.1 × 10–3 min−1, which was approximately four times faster than pristine WO3. Therefore, the superior optimal photocatalyst demonstrated reusability, with activities decreasing by only 9.8% after five cycles. The high photocatalytic performance and excellent stability of our photocatalyst indicate great potential for water pollution treatments.https://doi.org/10.1186/s11671-023-03919-0Fe-doped WO3/SiO2HeterostructurePhotocatalytic reductionNanocompositeCr6+ |
| spellingShingle | Natkritta Boonprakob Duangdao Channei Chen Zhao High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure Discover Nano Fe-doped WO3/SiO2 Heterostructure Photocatalytic reduction Nanocomposite Cr6+ |
| title | High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure |
| title_full | High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure |
| title_fullStr | High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure |
| title_full_unstemmed | High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure |
| title_short | High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO3/SiO2 heterostructure |
| title_sort | high performance photocatalytic reduction of cr vi using a retrievable fe doped wo3 sio2 heterostructure |
| topic | Fe-doped WO3/SiO2 Heterostructure Photocatalytic reduction Nanocomposite Cr6+ |
| url | https://doi.org/10.1186/s11671-023-03919-0 |
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