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学科主题: 物理化学
题名: Selective conversion of aqueous glucose to value-added sugar aldose on TiO2-based photocatalysts
作者: Chong, Ruifeng1;  Li, Jun1;  Ma, Yi1;  Zhang, Bao1;  Han, Hongxian1;  Li, Can1
通讯作者: 李灿
关键词: Photocatalysis ;  Biomass ;  Glucose ;  Reactive oxygen species ;  TiO2
刊名: JOURNAL OF CATALYSIS
发表日期: 2014-05-01
DOI: 10.1016/j.jcat.2014.03.009
卷: 314, 期:1, 页:101-108
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: We describe here a photocatalytic process for direct conversion of glucose to value-added chemicals (arabinose and erythrose) and H-2 in water under mild reaction conditions without additional acid or base. The total selectivity for the production of arabinose and erythrose on rutile TiO2-based photocatalyst reaches 91% at 65% conversion. More importantly, it has been demonstrated for the first time that the photodegradation of glucose initially involves C1-C2 bond cleavage (alpha-scission) to produce arabinose in the presence of water as solvent. To unravel the high selectivity on rutile TiO2, EPR and glucose reaction were carried out on rutile TiO2 in the presence of H2O2. It was found that the selectivity of the products is mainly dependent on the reactive oxygen species: the hydroxyl radicals ((OH)-O-center dot) may lead to low selectivity, while the peroxy species lead to a high selectivity. The advantages of the photocatalytic approach for conversion of biomass to value-added chemicals include (1) operation at low reaction temperature, (2) benign environmental effects due to using only water as both solvent and oxidant precursor, and (3) being wasteless due to high selectivity with H-2 as the by-product. (c) 2014 Elsevier Inc. All rights reserved.
关键词[WOS]: LACTIC-ACID ;  TIO2 ;  OXIDATION ;  HYDROGENATION ;  FERMENTATION ;  MECHANISMS ;  EVOLUTION ;  CATALYSTS ;  KINETICS ;  BIOMASS
语种: 英语
WOS记录号: WOS:000336951900011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144363
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Chong, Ruifeng,Li, Jun,Ma, Yi,et al. Selective conversion of aqueous glucose to value-added sugar aldose on TiO2-based photocatalysts[J]. JOURNAL OF CATALYSIS,2014,314(1):101-108.
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