Photocatalytic degradation of gaseous VOCs over Tm3+-TiO2: Revealing the activity enhancement mechanism and different reaction paths
文献类型：期刊论文
| 作者 | Rao, ZP; Shi, GS; Wang, Z; Mahmood, A; Xie, XF; Sun, J |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2020-09-01 |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2020.125078 |
| 文献子类 | Article |
| 英文摘要 | In this work, we synthesized thulium (Tm3+) modified TiO2 nanoparticles by a facile sol-gel route. We show that Tm3+-modified TiO2 exhibit superior photocatalytic activity than pure TiO2 towards gas-phase degradation of acetaldehyde, o-xylene, and their mixture. The photocatalytic activity enhances with the increasing Tm content from 0.1 to 0.5 mol%. The 0.5 mol%Tm-TiO2 sample demonstrated the highest photodegradation efficiency (> 90.0%) for acetaldehyde and o-xylene. According to the systematic characterization such as photoluminescence (PL), photocurrent, up-conversion spectra, UV-Vis diffuse reflectance spectroscopy and electron spin resonance (ESR) analysis, the enhanced photocatalytic performance can be attributed to introducing the new Tm-4f states between the original band gap of TiO2, which led to the increase of efficiency of light-induced electron-hole separation and the increase of hydrophilicity which resulted in the increased adsorption capacity towards acetaldehyde and o-xylene. Gas Chromatography-Mass Spectrometer (GC-MS) analysis suggested that o-xylene was first oxidized to o-benzaldehyde, which was eventually converted to butanol before being mineralized into CO2. However, new intermediates including phthalide, o-methyl acetophenone, naphthalene and 5-Methyl-4-octanone were detected in the mixture. |
| WOS关键词 | TM-DOPED TIO2 ; UP-CONVERSION ; GAS-PHASE ; CATALYTIC-OXIDATION ; OPTICAL-PROPERTIES ; FACILE SYNTHESIS ; ANATASE TIO2 ; TOLUENE ; NANOPARTICLES ; NANOTUBES |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27804]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Rao, ZP,Shi, GS,Wang, Z,et al. Photocatalytic degradation of gaseous VOCs over Tm3+-TiO2: Revealing the activity enhancement mechanism and different reaction paths[J]. CHEMICAL ENGINEERING JOURNAL,2020. |
| APA | Rao, ZP,Shi, GS,Wang, Z,Mahmood, A,Xie, XF,&Sun, J.(2020).Photocatalytic degradation of gaseous VOCs over Tm3+-TiO2: Revealing the activity enhancement mechanism and different reaction paths.CHEMICAL ENGINEERING JOURNAL. |
| MLA | Rao, ZP,et al."Photocatalytic degradation of gaseous VOCs over Tm3+-TiO2: Revealing the activity enhancement mechanism and different reaction paths".CHEMICAL ENGINEERING JOURNAL (2020). |
入库方式： OAI收割
来源：上海硅酸盐研究所
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