Improving visible light photocatalytic activity of NaNbO3: a DFT based investigation

RSC Advances ◽  
2016 ◽  
Vol 6 (93) ◽  
pp. 90188-90196 ◽  
Author(s):  
Brindaban Modak ◽  
Pampa Modak ◽  
Swapan K. Ghosh
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Band Gap ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Valence Band ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

The unique characteristics of the (W, N) dopant pair is that it reduces the band gap of NaNbO3 mainly by elevation of valence band maxima, which is very much crucial for photocatalyst for hydrogen evolution through water splitting.

MOF-derived yolk–shell CdS microcubes with enhanced visible-light photocatalytic activity and stability for hydrogen evolution

2017 ◽  
Vol 5 (18) ◽  
pp. 8680-8689 ◽  
Author(s):  
Yun Su ◽  
Dan Ao ◽  
Hong Liu ◽  
Yong Wang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Metal Organic Framework ◽  
Visible Light Photocatalytic Activity ◽  
Microwave Assisted ◽  
Framework Approach ◽  
Metal Organic ◽  
Visible Light Photocatalytic ◽  
Organic Framework

Unique yolk–shell CdS microcubes with excellent photocatalytic H2-evolution activity and stability are synthesized through a facile microwave-assisted metal–organic-framework approach.

Coupling with a narrow-band-gap semiconductor for the enhancement of visible-light photocatalytic activity: preparation of Bi2OxS3−x/Nb6O17 and application to the degradation of methyl orange

2016 ◽  
Vol 45 (35) ◽  
pp. 13944-13950 ◽  
Author(s):  
Gang Yan ◽  
Hongfei Shi ◽  
Huaqiao Tan ◽  
Wanbin Zhu ◽  
Yonghui Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Band Gap ◽  
Photocatalytic Performance ◽  
Narrow Band ◽  
Visible Light Photocatalytic Activity ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

A new 2D sheet composite Bi2OxS3−x/Nb6O17 has been prepared, which shows good visible light photocatalytic performance for the degradation of methyl orange.

scholarly journals Enhanced Visible Light Photocatalytic Activity of Mesoporous AnataseTiO2Codoped with Nitrogen and Chlorine

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Xiuwen Cheng ◽  
Xiujuan Yu ◽  
Zipeng Xing ◽  
Lisha Yang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Band Gap ◽  
Light Absorption ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Visible Region ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

Anatase mesoporous titanium dioxide codoped with nitrogen and chlorine (N-Cl-TiO2) photocatalysts were synthesized through simple one-step sol-gel reactions in the presence of ammonium chloride. The resulting materials were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflection spectrum (UV-vis DRS). XRD results indicated that codoping with nitrogen and chlorine could effectively retard the phase transformation of TiO2from anatase to rutile and the growth of the crystallite sizes. XPS revealed that nitrogen and chlorine elements were incorporated into the lattice of TiO2through substituting the lattice oxygen atoms. DRS exhibited that the light absorption of N-Cl-TiO2in visible region was greatly improved. As a result, the band gap of TiO2was reduced to 2.12 eV. The photocatalytic activity of the as-synthesized TiO2was evaluated for the degradation of RhB and phenol under visible light irradiation. It was found that N-Cl-TiO2catalyst exhibited higher visible light photocatalytic activity than that of P25 TiO2and N-TiO2, which was attributed to the small crystallite size, intense light absorption in visible region, and narrow band gap.

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