短孔道有序介孔碳-CdIn2S4异质纳米复合光催化材料的组装及其净化室内VOCs研究

项目名称： 短孔道有序介孔碳-CdIn2S4异质纳米复合光催化材料的组装及其净化室内VOCs研究

项目编号： No.21307132

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 环境科学、安全科学

项目作者： 陈江耀

作者单位： 广东工业大学

项目金额： 25万元

中文摘要： 本项目针对室内挥发性有机物(VOCs)浓度较低的特点，将短孔道有序介孔碳(SCOMC)对VOCs的吸附富集作用与纳米CdIn2S4对VOCs的可见光催化矿化作用相结合，借助超声诱导技术，实现SCOMC孔道中原位组装纳米CdIn2S4，研制出一种适于净化室内VOCs的异质纳米组装复合光催化材料，从而实现吸附剂与光催化剂的一体化。研究材料的性质及其对典型室内VOCs的吸附、降解和矿化行为，探讨材料的性质、吸附与光催化性能之间的关系，阐述载体SCOMC和纳米CdIn2S4耦合作用机理，揭示材料可见光催化活性提高的本质原因，阐明典型室内VOCs的性质、吸附速率、降解速率和矿化速率之间的关系和VOCs的降解机理，为新型可见光催化材料技术的研发及其应用于室内VOCs净化提供新的研究思路和方法，这对于了解实际室内环境中VOCs在介孔材料孔道中的吸附、迁移、光化学转化降解模拟具有非常重要的研究价值。

中文关键词： 短孔道有序介孔材料；复合催化剂；挥发性有机物；光催化；工程应用

英文摘要： Indoor air quality within buildings has been paid more and more attention with increasing awareness of the public environment and health. Volatile organic compounds (VOCs) are common hazardous species in indoor environment, which present significant health effects as frequently causing cancer and other sickness. However, the concentration of indoor VOCs usually might be at parts per billion to parts per million levels, which is difficult to be efficiently decomposed by the conventional methods. As an ambient temperature catalytic process, photocatalysis has gained considerable attention in view of air purification even at low concentrations. From the preliminary results obtained by the investigators on the photocatalytic degradation of VOCs with low concentration by UV-light-driven photocatalysts-semiconductor supported carbon nanotubes or silica gel composite materials, it was found that the obtained composite photocatalyst displayed enhanced decomposition activity in comparison with the pure semiconductor, owing to the enhancement of the adsorption and enrichment ability of the composite photocatalysts. However, the solar radiation energy utilization efficiency is limited, primarily because of UV light only accounts for about 4% of the solar radiation energy, while the visible light contributes to about 43%. N

英文关键词： Short channeled ordered mesoporous materials；Composite catalyst；Volatile organic compounds；Photocatalysis；Practical application