Effect of nitrogen-doping temperature on the structure and photocatalytic activity of the B,N-doped TiO{sub 2}

Journal Article · Fri Jan 14 23:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.10.039· OSTI ID:21504038

Zhou, Xiaosong ^[1]; Peng, Feng ^[1]; Wang, Hongjuan; Yu, Hao; Yang, Jian ^[1]

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1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640 (China)

B,N-TiO{sub 2} photocatalysts were synthesized by boron doping firstly and subsequently nitrogen doping in NH{sub 3} at variable temperatures. The effects of the nitrogen doping temperature on the structure and photocatalytic activity of the B,N-codoped TiO{sub 2} were investigated. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectrum (DRS), electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity was evaluated with photocatalytic degradation of methyl orange dye (MO) under visible light and UV-visible light irradiation. The results suggested that the boron and nitrogen can be incorporated into the TiO{sub 2} lattice either interstitially or substitutionally or both, while the Ti-O-B-N structure plays a vital role in photocatalytic activity in visible light region. The optimal nitrogen doping temperature is 550 {sup o}C. Higher temperature may form many oxygen vacancies and Ti{sup 3+} species, resulting in the decrease of photocatalytic activity in visible light. -- Graphical abstract: The changes of photocatalytic activity of B,N-TiO{sub 2} with variable nitrogen doping temperatures are attributed to the transformation of surface structure and oxygen vacancies, and the Ti-O-B-N structure plays a vital role in photocatalytic activity under visible light irradiation. Display Omitted Research highlights: > B,N-TiO{sub 2} photocatalysts are synthesized by boron doping firstly and subsequently nitrogen doping in NH{sub 3} at variable temperatures. > The boron and nitrogen can be incorporated into the TiO{sub 2} lattice either interstitially or substitutionally or both. > The temperature of nitrogen doping affects the transformation of surface structure and oxygen vacancies. > The Ti-O-B-N structure plays an important role in photocatalytic activity under visible light irradiation.

• OSTI ID: 21504038
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMINES
AMMONIA
AZO COMPOUNDS
AZO DYES
BORON
CATALYSIS
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFRACTION
DOPED MATERIALS
DYES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELECTRON SPIN RESONANCE
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
INDICATORS
IONS
MAGNETIC RESONANCE
MATERIALS
METHYL ORANGE
MICROSCOPY
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCATALYSIS
PHOTOELECTRON SPECTROSCOPY
POINT DEFECTS
RADIATIONS
RESONANCE
SCANNING ELECTRON MICROSCOPY
SCATTERING
SEMIMETALS
SPECTROSCOPY
SULFONIC ACIDS
SURFACES
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TITANIUM COMPOUNDS
TITANIUM IONS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
VISIBLE RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY