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Controlled synthesis of bismuth-containing compounds (α-, β- and δ-Bi2O3, Bi5O7NO3 and Bi6O6(OH)2(NO3)4·2H2O) and their photocatalytic performance
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gong, Shu Han, Qiaofeng Wang, Xin Zhu, Junwu |
| Copyright Year | 2015 |
| Abstract | Basic bismuth nitrate (Bi6O6(OH)2(NO3)4·2H2O; BiON), α- and δ-Bi2O3, or Bi5O7NO3 and β-Bi2O3 were synthesized from Bi(NO3)3·5H2O using a facile solution crystallization route or a subsequent calcination procedure by adjusting growth parameters such as the base and solvent. When hexamethylenetetramine (HMT) was used as a base, distorted hexagonal BiON prisms could be prepared in a mixed solution of 2-methoxyethanol (EM) and H2O (pH range 2.5–6), whereas δ-Bi2O3 nanosheets would be obtained if ethylene glycol (EG) instead of EM (pH ≈ 6) was used. The addition of NH3·H2O as a base led to the formation of amorphous nanoparticles in EG–H2O (pH ≈ 6) and EM–H2O (pH range 6–9) solutions or amorphous nanotubes in H2O (pH ≈ 9) solution, which completely converted into highly crystalline β-Bi2O3 nanoparticles or Bi5O7NO3 nanoplates upon calcination at 300, 350 or 400 °C for 2 h, respectively. Analogous to previous work, NaOH as a base in H2O or NaOH/EM–H2O solution (pH > 13) induced the formation of α-Bi2O3. The studies of the photocatalytic activity of the as-prepared samples indicated that δ-Bi2O3 nanosheets and Bi5O7NO3 nanoplates exhibited the highest degradation efficiency for Rhodamine (RhB) under visible light irradiation due to their sheet or plate-like morphology and the associated high surface areas. |
| Starting Page | 9185 |
| Ending Page | 9192 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C5CE01787D |
| Volume Number | 17 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c5/ce/c5ce01787d/c5ce01787d1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C5CE01787D |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
