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Dual functionality of TiO2/​biochar hybrid materials: photocatalytic phenol degradation in liquid phase and selective oxidation of methanol in gas phase

2017-05-31

Abstract

A series of new inorganic-organic hybrid materials based on TiO2 and new biochar-based supports (biochar obtained by pyrolysis of Miscanthus Straw Pellets (MSP) and Soft Wood Pellets (SWP) at 550 and 700 oC) were successfully prepared using ultrasound-assisted methodology. The resulting composites were characterized by a wide range physicochemical techniques and investigated in water and gas phase photocatalytic test reaction. Our best composite (TiO2/​SWP700) achieved phenol degradation of 64.1% (under UV light) and 33.6% (under visible light). In addition, it also showed an extraordinarily high activity (~90 %) in selective oxidation of methanol to methyl formate in flow gas phase, high selectivity to methyl formate (~80 %) and high yield of methyl formate (~88 %) after 240 minutes of illumination. It can be noticed that when TiO2 is supported on biochar, presented a superior photocatalytic ability and could be recycled at least 5 times in both photocatalytic runs tests with reproducible high photocatalytic efficiency.

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Paweł Lisowski, Juan Carlos Colmenares, Ondřej Mašek, Wojciech Lisowski, Dmytro Lisovytskiy, Agnieszka Kamińska, and Dariusz Łomot. ACS Sustainable Chem. Eng., 5(7) (20176274 – 6287.

https://​pubs​.acs​.org/​d​o​i​/​a​b​s​/​10​.​1021​/​a​c​s​s​u​s​c​h​e​m​e​n​g​.​7​b​01251

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