期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 158, 期 -, 页码 329-340出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2014.04.024
关键词
Graphene oxide; Chemical reduction; Oxygenated surface groups; TiO2; Photocatalysis
资金
- FCT (Fundacao para a Ciencia e a Tecnologia) [PTDC/AAC-AMB/122312/2010]
- FEDER (ERDF-European Regional Development Fund) through Programme COMPETE [FCOMP-01-0124-FEDER-019503]
- FCT
- FEDER [PEst-C/EQB/LA0020/2013, NORTE-07-0162-FEDER-000050, NORTE-07-0162-FEDER-000015]
- QREN
- ON2 (North Portugal Regional Operational Programme)
- NEPCAT in the National Strategic Reference Framework (NSRF) [38900]
- FCT [SFRH/BPD/88964/2012, SFRH/BPD/74239/2010]
- European Social Fund [IF/01501/2013]
- Human Potential Operational Programme
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/74239/2010, SFRH/BPD/88964/2012, PTDC/AAC-AMB/122312/2010] Funding Source: FCT
Photocatalysis has gained relevance in many applications, including production of fuels, green synthesis of added value products and water detoxification. Graphene-TiO2 photocatalysts are attracting great attention, but they should be prepared adequately, protecting the carbon material from the surrounding reactive media, maximizing the contact between TiO2 and graphene, and envisaging broad spectral response. Hereby, graphene oxide was chemically reduced using vitamin C and glucose (environmental friendly reducing agents) as well as hydrazine, and the evolution of the graphene oxygenated surface groups was systematically analyzed (pH(PZC),TPD,TG, XPS, DRUV-Vis, Raman and ATR-FTIR). These functionalities (such as epoxy and hydroxyl groups) mediate the efficient and uniform assembly of the TiO2 nanoparticles on the graphene oxide sheets, leading to highly efficient photocatalysts both under near-UV/Vis and visible light, which is of particular relevance for solar applications. (C) 2014 Elsevier B.V. All rights reserved.
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