scholarly journals Synthesis, Characterization, and Investigation of Visible Light Photocatalytic Activity of C Doped TiO2/CdS Core-Shell Nanocomposite

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Atul B. Lavand ◽  
Yuvraj S. Malghe ◽  
Suraj H. Singh
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Region ◽  
Cds Nanoparticles ◽  
Core Shell ◽  
Visible Absorption ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Uv Visible ◽  
Visible Light Photocatalytic

Carbon (C) doped TiO2/CdS core-shell nanocomposite (C/TiO2/CdS) was synthesized using microemulsion method. Synthesized powder was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and UV-visible spectrophotometery. TEM images reveal that C/TiO2/CdS core-shell heterostructure is successfully prepared with CdS as a core and C doped TiO2 as a shell. UV-visible absorption spectra show that CdS nanoparticles act as a sensitizer and effectively enhance the photoabsorption capacity of C/TiO2/CdS nanocomposite in visible region. Visible light photocatalytic activity of synthesized nanocomposite was evaluated for the degradation of methylene blue. C/TiO2/CdS core-shell nanocomposite exhibits better photocatalytic activity as compared to bare TiO2, CdS, CdS/TiO2, and C doped TiO2.

scholarly journals Visible-Light Photocatalytic Activity of N-Doped TiO2Nanotube Arrays on Acephate Degradation

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Xinlei Zhang ◽  
Juan Zhou ◽  
Yufen Gu ◽  
Ding Fan
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Nanotube Arrays ◽  
Optical Absorption Edge ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Uv Visible ◽  
Anodic Oxidation Method ◽  
Visible Light Photocatalytic ◽  
Nitrogen Doped Titanium Dioxide

Highly ordered nitrogen-doped titanium dioxide (N-doped TiO2) nanotube arrays were prepared by anodic oxidation method and then annealed in a N2atmosphere to obtain N-doped TiO2nanotube arrays. The samples were characterized with scanning electron microscope (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectrum (XPS), and UV-visible spectrophotometry (UV-vis) spectrum. Degradation of the insecticide acephate under the visible light was used as a model to examine the visible-light photocatalytic activity of N-doped TiO2nanotube arrays. The results show that N type doping has no notable effects on the morphology and structure of TiO2nanotube arrays. After N type doping, the N replaces a small amount of O in TiO2, forming an N–Ti–O structure. This shifts the optical absorption edge and enhances absorption of the visible light. N-doped TiO2nanotube arrays subjected to annealing at 500°C in N2atmosphere show the strongest photocatalytic activity and reach a degradation rate of 84% within 2 h.

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.

Characterization and Visible-Light Photocatalytic Activity of Nano-Bi2MoO6 Catalysts Prepared by Hydrothermal Process

2011 ◽  
Vol 117-119 ◽  
pp. 803-806
Author(s):  
Pei Song Tang ◽  
Hai Feng Chen ◽  
Feng Cao ◽  
Guo Xiang Pan ◽  
Min Hong Xu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectroscopy ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Degussa P25 ◽  
Uv Visible ◽  
Visible Light Photocatalytic

The Nano-Bi2MoO6was prepared using Bi(NO3)3•5H2O and Na2MoO4•2H2O as starting materials by a hydrothermal process. The prepared Bi2MoO6product was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible diffuse reflectance spectroscopy (DRS). It was found that the prepared nano-Bi2MoO6show narrow band gap of 2.88 eV. Consequently, the prepared nano-Bi2MoO6show high visible-light photocatalytic activity for decomposition of Rhodamine B in comparison with the commercial Degussa P25, which was ascribed to the visible-light absorption.

scholarly journals Synthesis and Characterization of Fe-N-S-tri-DopedTiO2Photocatalyst and Its Enhanced Visible Light Photocatalytic Activity

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Biying Li ◽  
Xiuwen Cheng ◽  
Xiujuan Yu ◽  
Lei Yan ◽  
Zipeng Xing
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Crystallite Size ◽  
Photoelectron Spectroscopy ◽  
Visible Region ◽  
Bandgap Energy ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Light Absorbance ◽  
Visible Light Photocatalytic

Fe-N-S-tri-dopedTiO2photocatalysts were synthesized by one step in the presence of ammonium ferrous sulfate. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflection spectrum (UV-Vis DRS). XPS analysis indicated that Fe (III) and S6+were incorporated into the lattice ofTiO2through substituting titanium atoms, and N might coexist in the forms of substitutional N (O-Ti-N) and interstitial N (Ti-O-N) in tridopedTiO2. XRD results showed that tri-doping with Fe, N, and S elements could effectively retard the phase transformation ofTiO2from anatase to rutile and growth of crystallite size. DRS results revealed that the light absorbance edge ofTiO2in visible region was greatly improved by tri-doping with Fe, N, and S elements. Further, the photocatalytic activity of the as-synthesized samples was evaluated by the degradation of phenol under visible light irradiation. It was found that Fe-N-S-tri-dopedTiO2catalyst exhibited higher visible light photocatalytic activity than that of pureTiO2and P25TiO2, which was mainly attributed to the small crystallite size, intense light absorbance in visible region, and narrow bandgap energy.

Synthesis of scaly Sn3O4/TiO2nanobelt heterostructures for enhanced UV-visible light photocatalytic activity

Nanoscale ◽  
2015 ◽  
Vol 7 (7) ◽  
pp. 3117-3125 ◽  
Author(s):  
Guohui Chen ◽  
Shaozheng Ji ◽  
Yuanhua Sang ◽  
Sujie Chang ◽  
Yana Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Photocatalytic Activity ◽  
Uv Visible ◽  
Visible Light Photocatalytic

N-doped CsTi2NbO7@g-C3N4 core-shell nanobelts with enhanced visible light photocatalytic activity

2018 ◽  
Vol 217 ◽  
pp. 235-238 ◽  
Author(s):  
Chao Liu ◽  
Chun Zhang ◽  
Jinshan Wang ◽  
Qixiang Xu ◽  
Xiaowei Chen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Core Shell ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic
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