The invention relates to the use of modified nanoparticles in wood-material boards, in particular oriented strand boards, for reducing the emission of volatile organic compounds (VOCs), wherein the nanoparticles are modified with at least one compound of general formula (I) RaSiX(4-a), wherein X is H, OH, or a hydrolyzable residue selected from the group comprising halogen, alkoxy, carboxy, amino, monoalkylamino or dialkylamino, aryloxy, acyloxy, and alkyl carbonyl, R is a non-hydrolyzable organic residue R selected from the group comprising substituted and unsubstituted alkyl, substituted and unsubstituted aryl, substituted and unsubstituted alkenyl, substituted and unsubstituted alkynyl, substituted and unsubstituted cycloalkyl, and substituted and unsubstituted cycloalkenyl, which can be interrupted by -O- or -NH-, and wherein R has at least one functional group Q, which is selected from a group containing an epoxide group, hydroxy group, ether group, amino group, monoalkylamino group, dialkylamino group, substituted and unsubstituted anilino group, amide group, carboxy group, alkynyl group, acryl group, acryloxy group, methacryl group, methacryloxy group, mercapto group, cyano group, alkoxy group, isocyanato group, aldehyde group, alkyl carbonyl group, acid anhydride group, and/or phosphoric acid group, and a is 1, 2 or 3, in particular 1 or 2. The invention further relates to a wood-material board containing the modified particles and to a method for producing such a wood-material board.