Enhanced Indoor Air Quality by Simultaneous Removal of VOCs and Fine PM

摘要

This study reports the rational synthesis of a dual-functional Janus nanostructure and its feasibility for simultaneous detection and removal of VOCs. The Janus nanostructure was synthesized via an anisotropic growth method, composed of plasmonic nanoparticles, semiconductors, and metal organic frameworks (MOF, e.g., Au@ZnO@ZIF-8). It exhibits excellent selective detection to Formaldehyde at room temperature over a wide range of concentrations (from 0.25 to 100 ppm), even in the presence of water and toluene molecules as interferences. Electret media perform perfectly on depth deposition. Uniform deposition patternearly equal amount of depositions of PM_(2.5) mass among layers are key points to be optimal filter media. Nanofiber acted as a safety guard to capture the penetrated PM_(2.5) during its efficiency reduction period. Due to the effective use of every parts of filter media, the proposed electret nanofiber filter media is a high energy and efficiency effectiveness media. It is feasible to combine the low pressure drop high holding capicity composite filter media with VOC treatment and detection module for simultaneously control of indoor gas and particle pollutions.