Enhanced adsorption and photocatalysis capability of generally synthesized TiO2-carbon materials hybrids

[Display omitted] •TiO2@carbon materials hybrids exhibited enhanced adsorption of visible light.•The carbon materials had a important impact on adsorption and catalysis capability.•TiO2@C hybrids possessed highly adsorption capacity for RhB dye.•TiO2@RGO hybrids showed excellent photocatalytic prefo...

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Published in:Advanced powder technology : the international journal of the Society of Powder Technology, Japan Japan, 2016-09, Vol.27 (5), p.1949-1962
Main Authors: Cheng, Gang, Xu, Feifan, Xiong, Jinyan, Tian, Fan, Ding, Jie, Stadler, Florian J., Chen, Rong
Format: Article
Language:English
Subjects:
Adsorption and photocatalysis
Carbon materials
Composition and structure optimization
Hybrids
Rhodamine B removal
TiO2
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Summary:[Display omitted] •TiO2@carbon materials hybrids exhibited enhanced adsorption of visible light.•The carbon materials had a important impact on adsorption and catalysis capability.•TiO2@C hybrids possessed highly adsorption capacity for RhB dye.•TiO2@RGO hybrids showed excellent photocatalytic preformance for RhB degradation. TiO2@RGO, TiO2@CNTs, and TiO2@C (glucose carbon) hybrid composites exhibiting both excellent adsorption capability and photocatalytic activity having great potential in pollutant removal were synthesized and composition and nanostructure were determined in detail by state-of-the-art methods. These hybrid materials show enhanced visible light absorption and RhB-dye removal capability via adsorption and photocatalysis with their efficiency generally increasing with carbon content. TiO2@C with low carbon concentration promotes photocatalytic performance, while increasing carbon amount improves the adsorption efficiency. Among the three kinds of TiO2-carbon hybrids, TiO2@RGO with optimized RGO-content (2wt.%) exhibited the best photocatalytic efficiency, attributed to efficient separation efficiency of injected electron and excited RhB with involving of RGO, while TiO2@C with 32wt.% C showed the highest adsorption capability due to the most negative zeta potential and highest BET surface areas. This comparison study has revealed how TiO2@carbon material hybrids can be optimized for adsorption and photocatalytic toxin removal.
ISSN:0921-8831
1568-5527
DOI:10.1016/j.apt.2016.06.026