Development of Photocatalytic Conversion of Glucose to Value-Added Chemicals by Supported-TiO₂ Photocatalysts

Abstract:

Biomass is an important renewable energy resource, which is used to replace the petroleum to produce chemicals. Glucose is a monomer of cellulose, which is the main component of biomass. In this work, conversions of glucose to value-added chemical by a simple method have been reported. TiO₂ photocatalysts were fabricated by sol-microwave method. Value-added chemical production was successfully carried out via photocatalytic conversion of glucose with TiO₂ photocatalysts. Arabinose, xylitol, gluconic acid, and formic acid were produced with photocatalytic reaction of TiO₂ under UVA irradiation. The value-added products (gluconic acid, arabinose, and xylitol) can generally be further used as building blocks for biorefinery production, pharmaceutical production, and food industry. In the conventional sol-microwave method, the agglomeration of fabricated TiO₂ particle was a limitation of photocatalytic activity. Therefore, the modification of TiO₂ fabrication by use of zeolite as a TiO₂ support was applied to increase efficiency of photocatalytic conversion of glucose and its selectivity. The effect of TiO₂ dosage on zeolite (TiO₂/zeolite) on photocatalytic activity and yield of products was monitored. The results from scanning electron microscopy (SEM) images indicated that zeolite supporter reduced agglomeration of spherical TiO₂ particles. The well distribution of TiO₂ particles on surface of zeolite particles could be observed in 15%TiO₂/zeolite. It was found that the highest photocatalytic conversion of glucose (77.3%) was obtained from the use of 15%TiO₂/zeolite as photocatalyst. The yields of gluconic acid, arabinose, xylitol, and formic acid were 8.6, 26.0, 3.7, and 33.89%, respectively.

• Periodical: Applied Mechanics and Materials (Volume 839)
• Pages: 39-43
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.839.39
• Online since: June 2016
• Authors: Kamonchanok Roongraung, Navadol Laosiripojana, Surawut Chuangchote*
• Keywords: Glucose, Photocatalyst, Sol-Microwave, TiO₂, Zeolite

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