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Your search keyword '"Jian-Wen Shi"' showing total 3 results
Start Over Author "Jian-Wen Shi" Journal international journal of photoenergy
3 results on '"Jian-Wen Shi"'

1. Sol-Gel to Prepare Nitrogen Doped TiO2 Nanocrystals with Exposed {001} Facets and High Visible-Light Photocatalytic Performance

Author

Hui-Ying Ai, Jian-Wen Shi, Rui-Xi Duan, Jian-Wei Chen, Hao-Jie Cui, and Ming-Lai Fu

Subjects
Renewable energy sources, TJ807-830
Abstract

A series of N-doped TiO2 nanocrystals with exposed {001} facets was prepared successfully by sol-gel method for the first time. The physicochemical properties of these resultant photocatalysts were characterized by XRD, TEM, XPS, and DRS, and their photocatalytic performances were evaluated by photocatalytic decoloration of methylene blue solution under visible light (λ>420 nm) irradiation. The results showed that the N-doped TiO2 nanocrystals with exposed {001} facets showed higher photocatalytic activity than P25. The enhanced photocatalytic performance can be attributed to synergistic effects of several factors, such as good crystallinity, better light response characteristic, and high reactivity of {001} facets.

Published
2014
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2. Layer-by-Layer Assembly and Photocatalytic Activity of Titania Nanosheets on Coal Fly Ash Microspheres

Author

Zhaoji Zhang, Cui Xing, Shaohua Chen, Zhi-Long Ye, Bin Xu, and Jian-Wen Shi

Subjects
Aqueous solution, Materials science, Article Subject, Renewable Energy, Sustainability and the Environment, Scanning electron microscope, Layer by layer, lcsh:TJ807-830, lcsh:Renewable energy sources, Nanotechnology, General Chemistry, complex mixtures, Atomic and Molecular Physics, and Optics, chemistry.chemical_compound, chemistry, Chemical engineering, Fly ash, Photocatalysis, General Materials Science, Absorption (chemistry), Photodegradation, Methylene blue
Abstract

In order to address the problem with titania distribution and recovery, series of Ti0.91O2/CFA photocatalysts (Ti0.91O2/CFA-n,n=2,4,6,and8) were fabricated by assembling Ti0.91O2nanosheets on coal fly ash (CFA) microspheres via the layer-by-layer assembly (LBLA) process and characterized by scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), N2-sorption, and ultraviolet-visible absorption (UV-vis) techniques. The SEM images and UV-vis spectra illustrated that Ti0.91O2nanosheets were immobilized successfully on the CFA by the LBLA approach and changed the characteristics of CFA noticeably. The photocatalytic activity of Ti0.91O2/CFA was evaluated by the photodegradation of methylene blue (MB) under UV irradiation. The results demonstrated that Ti0.91O2/CFA-6 showed the best photocatalytic activity among the series of Ti0.91O2/CFA irradiated for 60 min, with a decoloration rate above 43%. After photocatalysis, the Ti0.91O2/CFA could be easily separated and recycled from aqueous solution and Ti0.91O2nanosheets were still anchored on the CFA.

Published
2014
Full Text
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3. Sol-Gel to Prepare Nitrogen Doped TiO2 Nanocrystals with Exposed {001} Facets and High Visible-Light Photocatalytic Performance.

Author

Hui-Ying Ai, Jian-Wen Shi, Rui-Xi Duan, Jian-Wei Chen, Hao-Jie Cui, and Ming-Lai Fu

Subjects
SOL-gel processes, PHOTOCATALYSTS, NANOCRYSTALS, TITANIUM dioxide, DOPING agents (Chemistry), CRYSTALLINITY
Abstract

A series of N-doped TiO2 nanocrystals with exposed {001} facets was prepared successfully by sol-gel method for the first time. The physicochemical properties of these resultant photocatalysts were characterized by XRD, TEM, XPS, and DRS, and their photocatalytic performances were evaluated by photocatalytic decoloration of methylene blue solution under visible light (λ > 420 nm) irradiation. The results showed that the N-doped TiO2 nanocrystals with exposed {001} facets showed higher photocatalytic activity than P25. The enhanced photocatalytic performance can be attributed to synergistic effects of several factors, such as good crystallinity, better light response characteristic, and high reactivity of {001} facets. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
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