Visible-light-driven N-F-codoped TiO2 photocatalysts.: 1.: Synthesis by spray pyrolysis and surface characterization

被引:322
作者
Li, D [1 ]
Haneda, H [1 ]
Hishita, S [1 ]
Ohashi, N [1 ]
机构
[1] NIMS, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
关键词
D O I
10.1021/cm049100k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Novel photocatalytic materials, yellow-colored N-F-codoped TiO2 (NFT) powders, were synthesized from a mixed aqueous solution containing TiCl4 and NH4F by spray pyrolysis (SP). The resulting powders were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), NH3-temperature-programmed desorption (NH3-TPD), X-ray photoelectron spectroscopy (XPS), and N-2 adsorption. FE-SEM images and N-2 adsorption confirm that the NFT powders possessed spherical particles with a highly porous surface morphology. The doped N and F concentrations in the NFT powders depended significantly on the SP temperature and ranged from 0.10 to 0.26 and from 0.11 to 0.40 atomic % (at. %), respectively. NH3-TPD measurement indicates that the surface of the NFT powder was strongly acidic. Moreover, by investigating the characteristics of the TiO2 precursor hydrolysis and the thermal decomposition behaviors of the other components in the starting solution, we elucidated the reasons for the formation of porous NFT powders, which we ascribed to the enormous gas evolution from NH4F during TiO2 particle formation and the template role played by NH4Cl.
引用
收藏
页码:2588 / 2595
页数:8
相关论文
共 36 条
[1]   The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation [J].
Anpo, M ;
Takeuchi, M .
JOURNAL OF CATALYSIS, 2003, 216 (1-2) :505-516
[2]   Visible-light photocatalysis in nitrogen-doped titanium oxides [J].
Asahi, R ;
Morikawa, T ;
Ohwaki, T ;
Aoki, K ;
Taga, Y .
SCIENCE, 2001, 293 (5528) :269-271
[3]   FT-IR CHARACTERIZATION OF THE SURFACE-ACIDITY OF DIFFERENT TITANIUM-DIOXIDE ANATASE PREPARATIONS [J].
BUSCA, G ;
SAUSSEY, H ;
SAUR, O ;
LAVALLEY, JC ;
LORENZELLI, V .
APPLIED CATALYSIS, 1985, 14 (1-3) :245-260
[4]   Nanosize Ti-W mixed oxides:: Effect of doping level in the photocatalytic degradation of toluene using sunlight-type excitation [J].
Fuerte, A ;
Hernández-Alonso, MD ;
Maira, AJ ;
Martínez-Arias, A ;
Fernández-García, M ;
Conesa, JC ;
Soria, J ;
Munuera, G .
JOURNAL OF CATALYSIS, 2002, 212 (01) :1-9
[5]   Highly efficient formation of visible light tunable TiO2-xNx photocatalysts and their transformation at the nanoscale [J].
Gole, JL ;
Stout, JD ;
Burda, C ;
Lou, YB ;
Chen, XB .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (04) :1230-1240
[6]   Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and by nitrogen doping [J].
Ihara, T ;
Miyoshi, M ;
Iriyama, Y ;
Matsumoto, O ;
Sugihara, S .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 42 (04) :403-409
[7]   Nitrogen-concentration dependence on photocatalytic activity of TiO2-xNx powders [J].
Irie, H ;
Watanabe, Y ;
Hashimoto, K .
JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (23) :5483-5486
[8]   Photoreactions on LaTiO2N under visible light irradiation [J].
Kasahara, A ;
Nukumizu, K ;
Hitoki, G ;
Takata, T ;
Kondo, JN ;
Hara, M ;
Kobayashi, H ;
Domen, K .
JOURNAL OF PHYSICAL CHEMISTRY A, 2002, 106 (29) :6750-6753
[9]   Microfoamy particles of copper oxide and nitride by spray pyrolysis of copper-ammine complex solutions [J].
Kieda, N ;
Messing, GL .
JOURNAL OF MATERIALS SCIENCE LETTERS, 1998, 17 (04) :299-301
[10]   Synthesis of nanoporous metal oxide particles by a new inorganic matrix spray pyrolysis method [J].
Kim, SH ;
Liu, BYH ;
Zachariah, MR .
CHEMISTRY OF MATERIALS, 2002, 14 (07) :2889-2899