A Ti-based bi-MOF for the tandem reaction of H2O2 generation and catalytic oxidative desulfurization. Issue 4 (23rd January 2020)

• Record Type: Journal Article
• Authors: Liao, Xiaoyuan; Wei, Wenjie; Zhou, Yiqian; Zhang, Meng; Cai, Yi; Liu, Haitang; Yao, Yue; Lu, Shuxiang; Hao, Qinglan
• Is Part Of: Catalysis science & technology. Volume 10:Issue 4(2020)
• Page Start: 1015
• Page End: 1022
• Publication Date: 2020-01-23
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c9cy02318f
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : In the past, H2 O2 has been used as an oxidant when Ti-based materials are used as catalysts at ambient conditions. Abstract : In the past, H2 O2 has been used as an oxidant when Ti-based materials are used as catalysts at ambient conditions. However, H2 O2 suffers from high cost and safety concerns. Therefore, replacing H2 O2 with O2 has been highly desired. In this study, a Ti-based bi-MOF, MIL-125(Ti)@NH2 -MIL-125(Ti) has been synthesized through the internal extended growth of MIL-125(Ti) on NH2 -MIL-125(Ti). This Ti-based bi-MOF performed in sequence to synergistically catalyze the oxidative desulfurization (ODS) reaction with O2 . In this bi-MOF catalyst, MIL-125(Ti) is partly embedded and well distributed on the surface of NH2 -MIL-125(Ti). NH2 -MIL-125(Ti) serves as a catalyst for the production of H2 O2 from O2 /methanol under visible light, while MIL-125(Ti) serves as an ODS catalyst. The ODS over MIL-125(Ti) is the most effective as the in situ generated H2 O2 could be used fully, and the consumed H2 O2 (ODS reaction) also promotes further H2 O2 production through the Le Chatelier's principle. MIL-125(Ti) and NH2 -MIL-125(Ti) exist in close proximity in the bi-MOF material, which leads to an increase in the catalytic efficiency by 2.5-fold in comparison to that obtained from their physical mixture.