“Storage - oxidation” cycling provides a novel and efficient route for VOCs’ removal. Herein, Cu and Ag modified β zeolite with different SiO/AlO ratio were prepared as smart and responsive materials for toluene removal. The storage strength for toluene on the metal sites (ion-exchange sites, metallic clusters and nanoparticles) and zeolite substrate (acid sites and channels) were discriminated, and the corresponding regeneration either by in-situ thermal oxidation or plasma assisted oxidation was coupled to fulfill the “storage-oxidation” cycle. By virtue of the collaboration of identified Cu and Ag for toluene storage, a CuAg/β-25 catalyst was designed with high storage capacity (0.41 mmol/g) and adequate strength for trapping toluene, being available for in-situ thermal regeneration. In this study, the location of Cu and Ag species in β zeolite has been modulated to enable such smart and responsive materials available for toluene “storage and in-situ oxidation” cycling, which provides a general guidance for BTEX elimination.

中文翻译：

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用于甲苯“储存-氧化”循环去除的智能和响应性沸石催化剂

“储存-氧化”循环为VOCs的去除提供了一条新颖有效的途径。本文制备了不同 SiO/Al2O 比的 Cu 和 Ag 改性 β 沸石作为去除甲苯的智能响应材料。区分了金属位点（离子交换位点、金属簇和纳米颗粒）和沸石基质（酸位点和通道）上甲苯的存储强度，并通过原位热氧化或等离子体辅助氧化进行相应的再生完成“储存-氧化”循环。通过将已识别的Cu和Ag配合用于甲苯储存，设计了一种CuAg/β-25催化剂，该催化剂具有高储存容量（0.41 mmol/g）和足够的甲苯捕获强度，可用于原位热再生。在这项研究中，对β沸石中铜和银物质的位置进行了调节，使这种智能且响应性的材料可用于甲苯的“储存和原位氧化”循环，这为消除苯系物提供了一般指导。