2008
DOI: 10.1016/j.jssc.2007.11.012
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Synthesis and characterization of substitutional and interstitial nitrogen-doped titanium dioxides with visible light photocatalytic activity

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Cited by 302 publications
(167 citation statements)
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“…With the maximum intensity of anatase and rutile peaks was determined the percent values, so, corresponding to 93.88% anatase and 6.12% rutile. It suggested, that the substitution of N ions in the lattice of TiO 2 did not induce the formation of nitrogen impurities in the anatase phase, similar results has been obtained by others authors [29], [30] and [25]. The crystallite sizes Figure 4 shows the Raman spectrum on silicon substrate, which confirms the presence of the anatase phase in both layers of TiO 2 and N-TiO 2 .…”
Section: Resultssupporting
confidence: 82%
“…With the maximum intensity of anatase and rutile peaks was determined the percent values, so, corresponding to 93.88% anatase and 6.12% rutile. It suggested, that the substitution of N ions in the lattice of TiO 2 did not induce the formation of nitrogen impurities in the anatase phase, similar results has been obtained by others authors [29], [30] and [25]. The crystallite sizes Figure 4 shows the Raman spectrum on silicon substrate, which confirms the presence of the anatase phase in both layers of TiO 2 and N-TiO 2 .…”
Section: Resultssupporting
confidence: 82%
“…Hence, it could be concluded that doping the TiO 2 structure with nitrogen did not affect its crystalline structure. 7,11 The XRD patterns were used to determine the crystallite sizes of the TiO 2 anatase phase and N-TiO 2 , applying the Scherrer equation: …”
Section: X-ray Diffractionmentioning
confidence: 99%
“…7 After the first literature reported for TiO 2 doping with N in 2001 by Asahi et al, 8 resulting in photocatalytic activity at wavelengths up to 540 nm, the N-doped TiO 2 material was used in visible processes for degradation of phenol, 9 methyl orange, 7 and rhodamine B. 11 Given the current state-of-art, 5,[12][13][14] it is highly desirable to identify new synthesis routes for TiO 2 doping in order to obtain visible light-active photocatalysts. TiO 2 , doped or not, has been synthesized using techniques such as sputtering, 15,16 chemical vapor deposition, 17,18 sol-gel process, 19,20 hydrothermal process, 7 electrochemical methods, 21,22 and, more recently, ionothermal synthesis.…”
Section: Introductionmentioning
confidence: 99%
“…Los picos a 2927 y 2854 cm -1 observados en los espectros de los materiales sintetizados, pueden ser asignados a tensiones C-H e indicar la presencia de materia orgánica remante en los sólidos, relacionada con el ácido acético utilizado durante la síntesis [17,21]. Las señales que aparecen en el espectro del hidróxido de titanio (material MA) centradas a 3150 y 1401 cm -1 pueden resultar de modos vibracionales del tipo tensión y flexión características de enlaces N-H, mismas que pueden estar relacionadas con iones amonio (NH 4 + ) formados durante la disociación del NH 4 OH, especies que se encuentran adsorbidas en la superficie del material a bajas temperaturas y que actúan como fuente de nitrógeno, el cual se incorpora a la estructura del TiO 2 durante el proceso de calcinación [17,22,23] ), corroborando su presencia por XPS y sugiriendo que este anión identifica la presencia de nitrógeno estructural en la red del óxido de titanio [25][26][27]. Aunado a esto, las bandas situadas a 1452 y 1250 cm -1 también podrían indicar la nitruración del material.…”
Section: Espectroscopía Infrarrojaunclassified