scholarly journals A Cost-Effective Solid-State Approach to Synthesize g-C3N4Coated TiO2Nanocomposites with Enhanced Visible Light Photocatalytic Activity

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Min Fu ◽  
Junmin Pi ◽  
Fan Dong ◽  
Qiuyan Duan ◽  
Huan Guo
Keyword(s):  
Photocatalytic Activity ◽  
Solid State ◽  
Visible Light ◽  
Environmental Remediation ◽  
Cost Effective ◽  
Solid State Method ◽  
Visible Light Photocatalytic Activity ◽  
Enhanced Absorption ◽  
Light Region ◽  
Visible Light Photocatalytic

Novel graphitic carbon nitride (g-C3N4) coated TiO2nanocomposites were prepared by a facile and cost-effective solid-state method by thermal treatment of the mixture of urea and commercial TiO2. Because the C3N4was dispersed and coated on the TiO2nanoparticles, the as-prepared g-C3N4/TiO2nanocomposites showed enhanced absorption and photocatalytic properties in visible light region. The as-prepared g-C3N4coated TiO2nanocomposites under 450°C exhibited efficient visible light photocatalytic activity for degradation of aqueous MB due to the increased visible light absorption and enhanced MB adsorption. The g-C3N4coated TiO2nanocomposites would have wide applications in both environmental remediation and solar energy conversion.

scholarly journals Effects of the preparation method on the structure and the visible-light photocatalytic activity of Ag2CrO4

2014 ◽  
Vol 5 ◽  
pp. 658-666 ◽  
Author(s):  
Difa Xu ◽  
Shaowen Cao ◽  
Jinfeng Zhang ◽  
Bei Cheng ◽  
Jiaguo Yu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Environmental Remediation ◽  
Preparation Method ◽  
Blue Shift ◽  
Preparation Methods ◽  
Visible Light Photocatalytic Activity ◽  
The Comparative Study ◽  
Hydrothermal Methods ◽  
Visible Light Photocatalytic

Silver chromate (Ag2CrO4) photocatalysts are prepared by microemulsion, precipitation, and hydrothermal methods, in order to investigate the effect of preparation methods on the structure and the visible-light photocatalytic activity. It is found that the photocatalytic activity of the prepared Ag2CrO4was highly dependent on the preparation methods. The sample prepared by microemulsion method exhibits the highest photocatalytic efficiency on the degradation of methylene blue (MB) under visible-light irradiation. The enhanced photocatalytic activity could be ascribed to the smaller particle size, higher surface area, relatively stronger light absorption, and blue-shift absorption edge, which result in the adsorption of more MB molecules, a shorter diffusion process of more photogenerated excitons, and a stronger oxidation ability of the photogenerated holes. Considering the universalities of microemulsion, precipitation, and hydrothermal methods, this work may also provide a prototype for the comparative study of semiconductor based photocatalysis for water purification and environmental remediation.

Preparation and enhanced visible-light photocatalytic activity of Pancake Rocks-like WO3−x/C nanocomposite

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32983-32988 ◽  
Author(s):  
Cheng Liu ◽  
Zhanxu Yang ◽  
Yue Li
Keyword(s):  
Photocatalytic Activity ◽  
Solid State ◽  
Visible Light ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

The Pancake Rocks-like WO3−x/C nanocomposite was synthesized via the in situ solid state thermolysis of dedocylamine–intercalated H2W2O7 (H2W2O7/DDA), leading to the in situ production of interlayered carbon.

Preparing Bi12SiO20 crystals at low temperature through nontopotactic solid-state transformation and improving its photocatalytic activity by etching

2015 ◽  
Vol 3 (14) ◽  
pp. 7413-7421 ◽  
Author(s):  
Qiaofeng Han ◽  
Juan Zhang ◽  
Xin Wang ◽  
Junwu Zhu
Keyword(s):  
Photocatalytic Activity ◽  
Solid State ◽  
Low Temperature ◽  
Visible Light ◽  
State Transformation ◽  
Solid State Transformation ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

The egg-tart shaped BiOCl hierarchitectures with efficient visible-light photocatalytic activity were prepared through etching of Bi12SiO20 obtained at low temperature.

Effect of Calcination Temperature on Light Absorption and Visible Light Photocatalytic Activity of N Doped TiO2 Nano-Crystalline

2020 ◽  
Vol 12 (3) ◽  
pp. 449-453 ◽  
Author(s):  
Bo Wang ◽  
Ruiling Zhang ◽  
Jin Xu ◽  
Songyan Qin ◽  
Jiajun Zheng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Hydroxyl Groups ◽  
Visible Light Region ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Nano Crystalline ◽  
Light Region ◽  
Visible Light Photocatalytic

N doped TiO2 nano-crystalline was prepared through hydrolysis-precipitation process in the presence of ammonia water. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). It was found that N was incorporated into the lattice of TiO2 through substituting lattice oxygen atoms and coexisted in the forms of substitutional N (O–Ti–N) and interstitial N (Ti–O–N). Further, doping with N could greatly improve the phase transformation of TiO2 from rutile to anatase and light absorption in visible light region. The high visible light photocatalytic activity for the degradation of RhB of N doped TiO2 was mainly attributed to the small crystallite size, mixed phase composition, intense light absorption in visible light region, narrow band gap energy and surface hydroxyl groups.

Influence of Pt and Pd Modification on the Visible Light Photocatalytic Activity of N-Doped Titania Photocatalysts

2016 ◽  
Vol 16 (4) ◽  
pp. 3570-3576 ◽  
Author(s):  
Yulong Hu ◽  
Fu Dong ◽  
Hongfang Liu ◽  
Xingpeng Guo
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Metallic State ◽  
Visible Light Region ◽  
Electron Hole ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Light Region ◽  
Doped Titania ◽  
Visible Light Photocatalytic

Pd and Pt modified N-doped titania nanoparticle powders were prepared by a facile sol–gel method. Nitrogen doping and metal modification were carried out simultaneously during the preparation process. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy and X-ray photoelectron spectroscopy (XPS). The visible light photocatalytic activities of the asprepared samples were evaluated by analyzing their effect on the photocatalytic decomposition of methyl orange (MO). The chemical state of the metal is the key factor determining the performance of metal modified N-doped titania. The Pd used to modify the N-doped titania (Pd-NT) in our study was of the PdOx(x≤2) species, which increased the absorbance in the visible light region, decreased the recombination of photo-generated electron–hole pairs, and resulted in a significant enhancement in the visible light photocatalytic activity. The Pt species used to modify the N-doped titania (Pt-NT) was mainly in the metallic state, which resulted in a decrease in the absorbance in the visible light region, and an increase in the recombination of photo-generated electron–hole pairs. Pt modification led to a deterioration in the visible light photocatalytic activity of the material.

Enhanced visible light photocatalytic activity of a floating photocatalyst based on B–N-codoped TiO2 grafted on expanded perlite

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41385-41392 ◽  
Author(s):  
Xin Wang ◽  
Wei Wang ◽  
Xuejiang Wang ◽  
Jing Zhang ◽  
Zaoli Gu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Environmental Remediation ◽  
Expanded Perlite ◽  
Visible Light Photocatalytic Activity ◽  
Codoped Tio2 ◽  
Visible Light Driven ◽  
Visible Light Photocatalytic

Floatable photocatalyst for in situ environmental remediation with enhanced visible light driven photocatalytic activity.

Visible Light Photocatalytic Activity of Zinc Oxide-Copper Oxide Composites

2016 ◽  
Vol 705 ◽  
pp. 385-389 ◽  
Author(s):  
Dustin Loren V. Almanza ◽  
Maria Carmela T. Garcia ◽  
Alenn D. Prodigalidad ◽  
Marvin U. Herrera
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Wide Band ◽  
Ceramic Composites ◽  
Light Illumination ◽  
Wide Band Gap ◽  
Visible Light Photocatalytic Activity ◽  
Light Region ◽  
Photocatalytic Material ◽  
Visible Light Photocatalytic

Many traditional photocatalytic materials such as ZnO and TiO2 are ultraviolet light-triggered due to their wide band gap, however indoor light and sunlight reaching the surface of the earth are in the visible light region. This research aims to fabricate a photocatalytic material that can be triggered using visible light. Ceramic composites with ZnO and CuO interfaces were constructed using heterogeneous mixing technique. The photocatalytic activities of the samples were determined through their ability to degrade methyl orange dye under visible light illumination. Results show that the existence of the ZnO-CuO interface improved the visible light photocatalytic activity of the material.

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