Abstract
Hierarchical tungsten trioxide (WO3) hollow microspheres were successfully fabricated via a facile solution method and heat treatment, followed by platinum (Pt) deposition. The Pt/WO3 composite showed superior catalytic activity for formaldehyde (HCHO) removal under ambient condition, resulting from the synergistic effect between Pt and WO3. The optimal Pt loading amount is determined to be 1.0 wt%. The hierarchical hollow architecture endowed Pt/WO3 with relatively large SBET and opened porous architecture. These promote the diffusion and adsorption of HCHO on the Pt/WO3 composite. The present work affords new route to design highly effective catalyst for environmental protection.
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