Decomposition of Organic Compounds over NaBiO₃ under Visible Light Irradiation.

Abstract

Catalysts H 2000Decomposition of Organic Compounds over NaBiO3 under Visible Light Irradiation. -The title compound is prepared by heating NaBiO 3 ·nH 2 O in air at 413 K for 5 h and characterized by XRD, UV/VIS diffuse reflectance spectroscopy, and DFT electronic structure calculations. The samples crystallize with ilmenite type structure in the space group R3. Decomposition experiments of gaseous 2-propanol and methylene blue in the liquid phase indicate that NaBiO3 is a promising material for photooxidation of organics in the visible light range. -(KAKO, T.; ZOU, Z.; KATAGIRI, M.; YE*, J.; Chem.

Rapid photocatalytic degradation of PCP–Na over NaBiO3 driven by visible light irradiation

“…It is noted that the composition of NaBiO 3 valance band is very different from other Bi-containing semiconductor compounds, such as Bi 2 WO 6 [19] and BaBiO 3 [14]. According to the density of states (DOS) analysis of NaBiO 3 [15], broad valence band (VB) was mainly composed of the O 2p orbital owning to the empty Bi 6 s and Na 3 s orbitals. For the reaction [20]: In addition, the band edge of NaBiO 3 semiconductor at the point of zero charge was calculated by the equation as follows:…”

“…Bi-containing oxides such as Bi 2 Ti 2 O 7 [11], Bi 2 WO 6 [12,13] and BaBiO 3 [14] have been reported to be promising photocatalysts under visible light irradiation. NaBiO 3 is another new efficient photocatalyst which was firstly demonstrated by Tetsuya Kako et al Their results show that NaBiO 3 showed a higher photocatalytic activity towards methylene blue compared to some other visible light sensitive semiconductor compounds such as N doped TiO 2 and BiVO 4 [15]. To the best of our knowledge, however, a systematic study based on photocatalytic performance research of NaBiO 3 has not been reported so far.…”

“…And the nanosized TiO 2 (P25) shows little photocatalytic activity (photocatalytic degradation less than 5%) under the visible light irradiation because of its only UV sensitive property. Furthermore, NaBiO 3 has a very interesting energy band structure [15]. The hybridized sp orbital in the CB of NaBiO 3 support a high mobility on the sp bands for the photoexcited electrons, which may lead to suppression of the recombination of electron-hole pair and a relatively higher photocatalytic activity of the material than that of other photocatalysts.…”

Photocatalytic Degradation of Acridine Orange over NaBiO3 Driven by Visible Light Irradiation

“…Therefore, it is very important to develop visible light-sensitive photocatalyst, which can efficiently utilize inexpensive and inexhaustible solar energy. NaBiO 3 is a new efficient photocatalyst [10], which was firstly reported by Kako et al Their results indicate that NaBiO 3 showed a higher photocatalytic activity towards methylene blue compared to some other visible light-sensitive semiconductor compounds, such as N doped TiO 2 and BiVO 4 . Takei et al [11] studied the photocatalytic behavior of some bismutates with Bi 5+ and found that NaBiO 3 showed the highest activity for phenol decomposition among nine Bi 5+ photocatalysts.…”

(Bi, C and N) codoped TiO2 nanoparticles

“…Recently, a number of Bi-based photocatalysts, such as NaBiO 3 [16], Bi 3 O 4 Cl [17], Bi 4 Ti 3 O 12 [18] and Bi 2 WO 4 [3], were synthesized; these materials showed high photocatalytic activities even under visible light irradiation. It seems that bismuth maybe a proper candidate dopant element to extend the TiO 2 spectral response and thus to improve its photoreactivity.…”