A modular calcination method to prepare modified N-doped TiO2 nanoparticle with high photocatalytic activity

Zeng, Lei1,2; Lu, Zhao1; Li, Minghui1; Yang, Jin1; Song, Wulin1,3; Zeng, Dawen1; Xie, Changsheng1

2016-04

10.1016/j.apcatb.2015.10.048

APPLIED CATALYSIS B-ENVIRONMENTAL   影响因子和分区

0926-3373

1873-3883

In this paper, a highly active modified N-doped TiO2 nanoparticle is prepared by a novel modular calcination method. The combination among ammonia, hydrogen, air and vacuum module is investigated comprehensively. Moreover, the effect of calcination order on photocatalytic activity is also studied. The photocatalytic property of sample annealed in ammonia firstly is better than that of the sample annealed in ammonia last. NV-TiO2 sample which is prepared by combination between ammonia and vacuum module possesses the highest photocatalytic activity towards benzene. The photodegradation result shows that 300 ppm benzene can be decomposed completely during four hour visible light illumination. The excellent photocatalytic performance is attributed to the improvement of light harvesting, charge separation and increased surface electron scavenger, simultaneously. Besides, the photocatalytic degradation reaction path of benzene demonstrates that phenol is an important intermediate product. The faster decomposition of phenol is corresponded to higher photocatalytic reaction rate. In fact, the effect of calcination order on the photocatalytic activity is embodied in differences of the amount of oxygen vacancy and surface cleanliness. These findings aid us to prepare highly efficient visible light active photocatalyst by using a simple method and deepen the understanding on the mechanism of decomposing benzene. (C) 2015 Elsevier B.V. All rights reserved.

Modular calcination N-doped TiO2 Benzene Visible light Superoxide anion radical

SCI ; EI

英语

其他

National Basic Research Program of China[2009CB939705]

Chemistry ; Engineering

Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical

WOS:000367106200035

ELSEVIER SCIENCE BV

20154601546650

Ammonia ; Benzene ; Biodegradation ; Calcination ; Complexation ; Decomposition ; Light ; Nanoparticles ; Oxygen vacancies ; Phenols ; Photocatalysis ; Photocatalysts ; Reaction intermediates ; Titanium dioxide

Biotechnology:461.8 ; Light/Optics:741.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Solid State Physics:933 ; Crystalline Solids:933.1

CHEMISTRY

Web of Science

1.Huazhong Univ Sci & Technol, State Key Lab Mat Forming Simulat & Die & Mould T, Wuhan 430074, Peoples R China
2.South Univ Sci & Technol China, Shenzhen 518055, Peoples R China
3.Huazhong Univ Sci & Technol, Analyt & Testing Ctr, Wuhan 430074, Peoples R China

Zeng, Lei,Lu, Zhao,Li, Minghui,et al. A modular calcination method to prepare modified N-doped TiO2 nanoparticle with high photocatalytic activity[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2016,183:308-316.

Zeng, Lei.,Lu, Zhao.,Li, Minghui.,Yang, Jin.,Song, Wulin.,...&Xie, Changsheng.(2016).A modular calcination method to prepare modified N-doped TiO2 nanoparticle with high photocatalytic activity.APPLIED CATALYSIS B-ENVIRONMENTAL,183,308-316.

Zeng, Lei,et al."A modular calcination method to prepare modified N-doped TiO2 nanoparticle with high photocatalytic activity".APPLIED CATALYSIS B-ENVIRONMENTAL 183(2016):308-316.