Abstract
採用水熱法合成了一維La﹝OH﹞₃納米棒光催化劑，通過XRD，SEM，TEM，XPS，UV-vis DRS等對樣品進行結構表徵，並研究了其光催化凈化NO的性能。結果表明，La﹝OH﹞₃納米棒具有均勻的形貌結構，且對紫外光有較強吸收，水熱溫度對La﹝OH﹞₃納米棒微結構和光催化活性有較大影響。水熱溫度為180°C下樣品﹝La-180﹞光催化活性最佳且穩定性良好。ESR捕獲結果表明，La-180產生的？OH信號強於La-150和La-210，因而具備更優異的光催化活性。La-180產生更多？OH的原因是其UV光吸收增加；La-180納米棒形貌均一無團聚，增強了電荷分離效率；且La-180具有較大比表面積，增加了催化劑表面活性位點。
The one dimensional La(OH)₃ nanorods were synthesized by a hydrothermal method, and the microstructure of was characterized with XRD, SEM, TEM, XPS and UV-vis DRS. The as-prepared samples were applied in photocatalytic NO purification. The results indicated that the La(OH)₃ nanorods have uniform morphology and could absorb UV light. The hydrothermal temperature exerted a great influence on the microstructure and photocatalytic activity of La(OH)₃ nanorods. The highest photocatalytic performance and stability can be achieved when the temperature is controlled at 180℃ (La-180). The ESR trapping experiment showed that the signal of ⋅OH radicals produced by La-180 was stronger than that of La-150 and La-210, thus La-180 demonstrated highly enhanced photocatalytic activity. The enhanced generation of ⋅OH radicals by La-180 was associated with the enhanced UV-light absorption, uniform morphology of La-180 with enhanced charge separation efficiency and large specific surface areas providing more surface active sites. Copyright © 2017 Editorial Board of China Environmental Science. All right reserved.
The one dimensional La(OH)₃ nanorods were synthesized by a hydrothermal method, and the microstructure of was characterized with XRD, SEM, TEM, XPS and UV-vis DRS. The as-prepared samples were applied in photocatalytic NO purification. The results indicated that the La(OH)₃ nanorods have uniform morphology and could absorb UV light. The hydrothermal temperature exerted a great influence on the microstructure and photocatalytic activity of La(OH)₃ nanorods. The highest photocatalytic performance and stability can be achieved when the temperature is controlled at 180℃ (La-180). The ESR trapping experiment showed that the signal of ⋅OH radicals produced by La-180 was stronger than that of La-150 and La-210, thus La-180 demonstrated highly enhanced photocatalytic activity. The enhanced generation of ⋅OH radicals by La-180 was associated with the enhanced UV-light absorption, uniform morphology of La-180 with enhanced charge separation efficiency and large specific surface areas providing more surface active sites. Copyright © 2017 Editorial Board of China Environmental Science. All right reserved.
| Original language | Chinese |
|---|---|
| Pages (from-to) | 899-907 |
| Journal | 中國環境科學 |
| Volume | 37 |
| Issue number | 3 |
| Publication status | Published - Mar 2017 |
Citation
孫艷娟、肖香、董帆、何詠基和吳忠標(2017)：La﹝OH﹞₃納米棒的制備、表徵及光催化凈化NO的性能，《中國環境科學》，37(3)，頁899-907。Keywords
- 水熱法
- La﹝OH﹞₃
- 納米棒
- 光催化
- NO去除
- Hydrothermal method
- Nanorods
- Photocatalysis
- NO removal
- Alt. title: The investigation on the preparation, characterization and photocatalytic NO purification performance of La (OH)₃ nanorods