One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation
Maghemite (γ-Fe2O3) nanopowders were synthesized under aeration (oxidizing) conditions by aqueous synthesis in this study. The microstructures of the prepared powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET-BJH. The XRD analysis and the chemical exp...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/791829 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850174043052834816 |
|---|---|
| author | Chunhua Liang Hui Liu Jianmin Zhou Xiaochun Peng Haizhou Zhang |
| author_facet | Chunhua Liang Hui Liu Jianmin Zhou Xiaochun Peng Haizhou Zhang |
| author_sort | Chunhua Liang |
| collection | DOAJ |
| description | Maghemite (γ-Fe2O3) nanopowders were synthesized under aeration (oxidizing) conditions by aqueous synthesis in this study. The microstructures of the prepared powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET-BJH. The XRD analysis and the chemical experiments showed that well-crystallized γ-Fe2O3 nanoparticles were successfully obtained with a mean particle size of approximately 17 nm. The prepared γ-Fe2O3 was spherical with a BET surface area of 14.357 m2/g and a total pore volume of 0.050 cm3/g. Varying the reaction conditions, such as pH, temperature, and reaction time, we obtained crystallized γ-Fe2O3 powders with different crystallization extent and different particle sizes. When the pH of the reaction suspension was increased, the reaction time was prolonged, and the reaction temperature was increased, the γ-Fe2O3 powders underwent superior crystallization and had larger particle sizes. All the obtained γ-Fe2O3 powders had significant photocatalytic activities under both UV and visible light irradiation for Orange I degradation, and the powders with better crystallization and larger particle size had relatively lower activities for Orange I photocatalytic degradation. The one-step aqueous synthesis method presented in this paper may provide an advantageous pathway to synthesize large quantities of this important iron oxide. |
| format | Article |
| id | doaj-art-c72b8defeffc44d782e6d0a6a2b2f9ee |
| institution | OA Journals |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-c72b8defeffc44d782e6d0a6a2b2f9ee2025-08-20T02:19:44ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/791829791829One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I DegradationChunhua Liang0Hui Liu1Jianmin Zhou2Xiaochun Peng3Haizhou Zhang4Department of Chemistry, Huaihua University, Huaihua, Hunan 418008, ChinaState Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, ChinaState Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, ChinaState Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, ChinaDepartment of Chemistry, Huaihua University, Huaihua, Hunan 418008, ChinaMaghemite (γ-Fe2O3) nanopowders were synthesized under aeration (oxidizing) conditions by aqueous synthesis in this study. The microstructures of the prepared powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET-BJH. The XRD analysis and the chemical experiments showed that well-crystallized γ-Fe2O3 nanoparticles were successfully obtained with a mean particle size of approximately 17 nm. The prepared γ-Fe2O3 was spherical with a BET surface area of 14.357 m2/g and a total pore volume of 0.050 cm3/g. Varying the reaction conditions, such as pH, temperature, and reaction time, we obtained crystallized γ-Fe2O3 powders with different crystallization extent and different particle sizes. When the pH of the reaction suspension was increased, the reaction time was prolonged, and the reaction temperature was increased, the γ-Fe2O3 powders underwent superior crystallization and had larger particle sizes. All the obtained γ-Fe2O3 powders had significant photocatalytic activities under both UV and visible light irradiation for Orange I degradation, and the powders with better crystallization and larger particle size had relatively lower activities for Orange I photocatalytic degradation. The one-step aqueous synthesis method presented in this paper may provide an advantageous pathway to synthesize large quantities of this important iron oxide.http://dx.doi.org/10.1155/2015/791829 |
| spellingShingle | Chunhua Liang Hui Liu Jianmin Zhou Xiaochun Peng Haizhou Zhang One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation Journal of Chemistry |
| title | One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation |
| title_full | One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation |
| title_fullStr | One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation |
| title_full_unstemmed | One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation |
| title_short | One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation |
| title_sort | one step synthesis of spherical γ fe2o3 nanopowders and the evaluation of their photocatalytic activity for orange i degradation |
| url | http://dx.doi.org/10.1155/2015/791829 |
| work_keys_str_mv | AT chunhualiang onestepsynthesisofsphericalgfe2o3nanopowdersandtheevaluationoftheirphotocatalyticactivityfororangeidegradation AT huiliu onestepsynthesisofsphericalgfe2o3nanopowdersandtheevaluationoftheirphotocatalyticactivityfororangeidegradation AT jianminzhou onestepsynthesisofsphericalgfe2o3nanopowdersandtheevaluationoftheirphotocatalyticactivityfororangeidegradation AT xiaochunpeng onestepsynthesisofsphericalgfe2o3nanopowdersandtheevaluationoftheirphotocatalyticactivityfororangeidegradation AT haizhouzhang onestepsynthesisofsphericalgfe2o3nanopowdersandtheevaluationoftheirphotocatalyticactivityfororangeidegradation |