| abstract |
A porous material useful for efficiently adsorbing and removing siloxanes, a siloxane remover (or adsorbent) composed of the porous material, and a filter useful for removing siloxanes ( Alternatively, a gas sensor provided with this filter) is provided. The present invention is a porous substance in which a sulfonic acid group-modified metal oxide sol is attached to a porous material and siloxanes are adsorbed, preferably a functional group represented by the following formula (1): A porous material obtained by attaching a sulfonic acid group-modified metal oxide sol modified with a porous material. HOS (═O) 2 —R—Si (CH 3 ) n (—O—) 3-n (1) {In formula, R is a C1-C10 alkylene group (this alkylene chain may contain a urethane bond or a urea bond), and n represents 0 or 1. } [Selection] Figure 1 |