Enhanced TiO2 photoactivity under solar light using biogenic carbon additives

MATOS, J.;FERNÁNDEZ, M.; ANIA, C.:
Proceedings of the world conference on carbon (Carbon 2018), July 2018.

Introduction

Rice husk (RH), an agricultural waste with high silica content (ca. 13 29 wt.%), and lignocellulose as major hydrocarbon composition is receiving an increasing attention in the last years for its use as adsorbent, electrode and catalyst in various application fields covering wastewater treatment, biomedicine, energy storage in batteries, and catalysis. On the other hand photodegradation of pollutants under solar irradiation is a promising technology in environmental remediation. In this sense these hybrid materials could be interesting/promising option/candidates as catalysts for this purpose. Anyway SiO2-based catalysts usually present low absorption coefficient in the solar range. In this sense, the use of TiO2, the most widely used photocatalyst, as additive in the synthesis of TiO2-dopped hybrid materials is an interesting strategy to enhance the photocatalytic performance of the RH (SiO2)-carbon hybrids. In this regard, the main objective of the present work is to prepare silica-TiO2-hybrid materials to evaluate their activity as photocatalysts for the degradation of recalcitrant dyes in aqueous media under simulated solar light.

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