Synthesis, Characterization, and Photodegradation Behavior of Single-Phase Anatase TiO2 Materials Synthesized from Ti-oxychloride Precursors

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Langmuir

DOI:https://doi.org/10.1021/la8014018· OSTI ID:980606

Colon, G; Sampedro, P; Fernandez-Garcia, M; Chen, H; Hanson, J; Rodriguez, J

Single-phase anatase-TiO2 nanomaterials with a size of ca. 10 nm and variable quantities of anion impurities were prepared using a novel pathway based on the use of amorphous ammonium Ti-oxychloride precursors synthesized using Ti/Cl initial ratios between 1 and 6. The precursor nature and evolution under thermal treatment were studied using chemical analysis, XRD, XPS, DRIFTS, and mass spectrometry. The nature and concentration of anatase-TiO2 materials anion impurities were analyzed by XPS and DRIFTS. It is shown that negatively charged impurities located in substitutional positions of the anatase network are maximized for a sample synthesized using a Ti/Cl 1:1 atomic ratio and are responsible for the elimination of liquid-phase (phenol) and gas-phase (isopropanol or methylcyclohexane) pollutants under sunlight excitation. A link is established among the initial chemical characterization of the precursors, the final morphological, structural, and chemical composition of the oxide materials, and their photochemical properties.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 980606
• Report Number(s): BNL--93524-2010-JA
• Journal Information: Langmuir, Journal Name: Langmuir Vol. 24; ISSN LANGD5; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
99 GENERAL AND MISCELLANEOUS
ANIONS
BEHAVIOR
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
EVOLUTION
EXCITATION
IMPURITIES
MASS SPECTROSCOPY
MATERIALS
OXIDES
PHENOL
POLLUTANTS
PRECURSOR
SIZE
SYNTHESIS
USES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
national synchrotron light source