Hollow zeolite-based V-Cu bimetallic oxide catalyst for remarkable catalytic oxidation of chlorobenzene

Using catalytic methods to remove volatile organic pollutants is a promising approach, but finding catalysts with exceptional activity is still a difficult task. In this study, we have devised a hollow zeolite-based structure that not only facilitates the regulation of acidic sites but also provides a conducive nano environment for the incorporation of V-Cu bimetal. The resulting catalyst exhibits a remarkable hollow nanostructure, micro-mesoporous pore structures on the outer wall, with an increased number of acid sites in the cavity. We have identified the enhancement of reducibility at low temperatures and the increase in reactive oxygen species and oxygen vacancy on the catalyst surface as the key factors for catalytic degradation. The catalyst (Cu, V)10@Hol ZSM-5–49 demonstrates excellent performance, showing impressive results such as 90% elimination of chlorobenzene (CB) at 187℃ and over 98% removal within 60 h at 300℃. Our research has found that using zeolite-based catalysts with hollow structures, more acidic sites, and oxygen vacancies can effectively degrade chlorine-containing volatile organic pollutants at low temperatures. This multifunctional sites and structure control strategy could lead to the development of highly effective catalysts for environmental remediation.