Novel polypyrrole-sensitized hollow TiO2/fly ash cenospheres: Synthesis, characterization, and photocatalytic ability under visible light

2012 ◽  
Vol 258 (24) ◽  
pp. 9989-9996 ◽  
Author(s):  
Bing Wang ◽  
Chuang Li ◽  
Jianfeng Pang ◽  
Xutang Qing ◽  
Jianping Zhai ◽  
...  
Keyword(s):  
Fly Ash ◽  
Visible Light ◽  
Photocatalytic Ability ◽  
Fly Ash Cenospheres

Immobilization of BiOBr/BiOI Hierarchical Microspheres on Fly Ash Cenospheres as Visible Light Photocatalysts

2016 ◽  
Vol 69 (1) ◽  
pp. 119 ◽  
Author(s):  
Li Lin ◽  
Ya Wang ◽  
Manhong Huang ◽  
Donghui Chen
Keyword(s):  
Photocatalytic Activity ◽  
Fly Ash ◽  
Visible Light ◽  
Diffuse Reflectance Spectroscopy ◽  
Three Dimensional ◽  
One Pot ◽  
Transmission Electron ◽  
Hierarchical Microspheres ◽  
2D Nanosheets ◽  
Fly Ash Cenospheres

Three-dimensional (3D) BiOBr/BiOI hierarchical microspheres were successfully fabricated on the surface of fly ash cenospheres (FACs) via a facile one-pot solvothermal method for the first time. The as-prepared samples were characterized by XRD, SEM, energy-dispersive X-ray spectroscopy, UV–visible diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy. The results indicated that the loaded hierarchical microspheres exhibited a uniform distribution, and some aggregation was observed. These well-dispersed hierarchical microspheres were composed of 2D nanosheets, which possess heterojunction structures. Based on the photodegradation tests examining the removal of rhodamine B from water under visible light irradiation (λ > 420 nm), the photocatalytic activity of BiOB/BiOI/FACs was superior to that of BiOBr/FACs and BiOI/FACs. A proposed mechanism for the enhanced photocatalytic activity displayed by BiOB/BiOI/FACs is discussed.

scholarly journals Ag-TON nanospheres coupled with fly ash cenospheres for wastewater treatment under visible light irradiation

2018 ◽  
Vol 78 (11) ◽  
pp. 2321-2327 ◽  
Author(s):  
Yan Ma ◽  
Zhihuan Zhao ◽  
Jimin Fan ◽  
Zhanyong Gu ◽  
Bin Zhang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Visible Light ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Hydrolysis Method ◽  
Composite Photocatalysts ◽  
Recycle And Reuse ◽  
Doping Ratio ◽  
Fly Ash Cenospheres

Abstract Using tetra-n-butyl titanate as raw material and fly ash cenospheres (FAC) as carrier, the photocatalysts of Ag-TON/FAC were successfully prepared by solvothermal and in-situ hydrolysis method. These visible light photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fluorescence spectroscopy (FL) and UV–vis diffuse reflectance spectra (DRS). In this study, methyl orange and ciprofloxacin were used as wastewater degradation targets to investigate the effect of the amount of titanium dioxide and the amount of Ag doping on the activity of photocatalysts. On the basis of this, the optimal ratio of TiO2 to FAC was 2:1 and the optimum doping ratio of Ag was determined to be 15 wt.%. The composite photocatalysts dispersed uniformly and were easy to recycle and reuse, which were benefits in fully utilizing the solar energy. The degradation efficiency remained at more than 60% after being renewed five times for MO and ciprofloxacin. The photocatalysts of Ag-TON/FAC can reduce the environmental burden caused by FAC also.

Preparation of Novel Pt–BiVO4/Fly Ash Cenospheres Composites with High Photocatalytic Performance

2014 ◽  
Vol 1010-1012 ◽  
pp. 216-219
Author(s):  
Jin Zhang
Keyword(s):  
Fly Ash ◽  
Visible Light ◽  
Photoelectron Spectra ◽  
X Ray Diffraction ◽  
Photochemical Reduction ◽  
X Ray ◽  
Photocatalytic Activities ◽  
Metalorganic Decomposition ◽  
Composite Samples ◽  
Fly Ash Cenospheres

A novel fly ash cenospheres supported Pt–BiVO4 composites (Pt–BiVO4/FACs) photocatalysts were prepared by modified metalorganic decomposition process, followed by photochemical reduction. The composites were characterized by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), and UV–vis diffused reflectance spectroscopy (DRS) techniques. The results indicate that the visible light absorption of the Pt–BiVO4/FACs composite is greatly enhanced. The Pt element is present in the metallic form and disperses in the composite samples. Photocatalytic activities of the Pt–BiVO4/FACs composites were evaluated by the methylene blue (MB) degradation under visible light irradiation. The results indicate that the photocatalytic efficiency is significantly improved after the Pt species was loaded and the 2 wt% Pt-loaded composite showed the highest photocatalytic activity.

Enhanced photodegradation of antibiotics solution under visible light with Fe2+/Fe3+ immobilized on TiO2/fly-ash cenospheres by using ions imprinting technology

2011 ◽  
Vol 172 (2-3) ◽  
pp. 615-622 ◽  
Author(s):  
Pengwei Huo ◽  
Ziyang Lu ◽  
Huiqin Wang ◽  
Jianming Pan ◽  
Huaming Li ◽  
...  
Keyword(s):  
Fly Ash ◽  
Visible Light ◽  
Fly Ash Cenospheres
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