标题: Design of high-performance ozone catalysts by identifying and modulating anchoring sites for metal on γ-Al2O3 spheres

作者: Xu, T (Xu, Tao); Jiang, MH (Jiang, Meihui); Mao, XH (Mao, Xuhui); Sher, F (Sher, Falak); Ren, TL (Ren, Tianlin); Xin, K (Xin, Kun); Hussain, I (Hussain, Irshad); Hua, HL (Hua, Helin); Wang, X (Wang, Xu)

来源出版物: APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY  卷: 372  文献号: 125321  DOI: 10.1016/j.apcatb.2025.125321  Published Date: 2025 SEP 5  

摘要: This study investigated the important role of hydroxyl groups for the preparation of gamma-Al2O3 sphere supported metal catalysts. gamma-Al2O3 spheres were calcinated at varied temperatures for the analysis of surface hydroxyl group, and they were subsequently loaded with iron to evaluate the metal dispersion and the performance for catalytic ozonation. The results showed that the critical site for metal anchoring was hydroxyl group, thus a higher hydroxyl group content favored the metal dispersion on gamma-Al2O3 spheres; meanwhile, the iron-loaded catalysts prepared by the gamma-Al2O3 support calcinated at 300 degrees C achieved the highest catalytic efficiency for pnitrophenol degradation (74.6 %). The favorable performance of the catalyst was attributed to the excellent dispersion of iron oxide particles, and the abundant oxygen vacancy sites that facilitated the formation of ozoneactivating sites, Fe-centered hydroxyl groups ([Fe-OH]). This study provides an important theoretical guidance for the design and application of ozone catalysts.

作者关键词: Surface hydroxyl groups; Catalytic ozonation; Supported metal catalysts; gamma-Al 2 O 3

KeyWords Plus: OXIDATION; ACID

地址: [Xu, Tao; Jiang, Meihui; Mao, Xuhui; Ren, Tianlin; Xin, Kun; Wang, Xu] Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

[Sher, Falak; Hussain, Irshad] Lahore Univ Management Sci LUMS, SBA Sch Sci & Engn, Dept Chem & Chem Engn, Opposite Sect U,DHA, Phase 2, Lahore Cantt 54792, Pakistan.

[Hua, Helin] Nanchang Hangkong Univ, Sch Enviromental & Chem Engn, Nanchang 33063, Peoples R China.

通讯作者地址: Mao, XH; Hua, HL (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.

电子邮件地址: clab@whu.edu.cn; huahelin@nchu.edu.cn

影响因子：20.3