Abstract
An effort was made to develop carbonized TiO2-woody composites which can effectively remove and decompose harmful air pollutants in environments. As an example of an air pollutant, formaldehyde (HCHO) was selected for evaluating the carbonized TiO2-woody composites. The composites were composed of carbonized wood as an adsorbent and the anatase-form of titanium dioxide (TiO2) as a photo-catalyst. They showed a much higher decomposing ability toward formaldehyde, when compared with the performance of non-composite controls composed of a simple physical mixture of carbonized wood and TiO2 granules. This indicates that synergetic effects existed in the carbonized TiO2-woody composites for photo-catalytic environmental cleaning. The topochemical mechanism inducing such synergetic effects is discussed in relation to the distribution of TiO2 granules in the composites.
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