Electron-coupled enhanced interfacial interaction of Ce-MOF/Bi2MoO6 heterostructure for boosted photoreduction CO2. Issue 3 (June 2022)

• Record Type: Journal Article
• Authors: Cai, Wei; Yu, Xue; Cao, Yan; Hu, Chenyao; Wang, Yi; Zhao, Yunxia; Bu, Yunfei
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 3(2022)
• Publication Date: 2022-06
• Subjects: Ce-MOF/Bi2MoO6 -- Heterostructure -- Electron-coupled interface -- Photoreduction of CO2; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.107461
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: To achieve the task of "Carbon neutrality" in China, the photoreduction of CO2 was applied over the solid-phase synthesized Ce-MOF/Bi2 MoO6 heterostructure. The inexhaustible driven force of sunlight was adopted and the value-added chemicals of methane, methanol and formic acid were obtained during photoreduction. The firstly successful construction of Ce-MOF/Bi2 MoO6 heterostructure was generated by their intense contact via the electron-coupled structure, which could take full advantage of the high surface area of Ce-MOF and the efficient electrons transfer of Bi2 MoO6 . The segregation and transport of photoexcited carriers were heightened by the enhanced interfacial interaction. Moreover, the generation of HCOOH appeared only over the composites, which was caused by the inhibition of the fast interaction between the photoexcited electrons and CO2 -reduced intermediates. As a result, the CO2 photoreduction performance of electrons-induced heterostructured of Ce-MOF/Bi2 MoO6 composites exhibited higher CH4, CH3 OH and HCOOH yield amount than the neat Ce-MOF and BMO. The optimized photocatalyst reached up to 113.87 μ mol·h −1 ·g −1 of CH4, 40.59 μ mol·h −1 ·g −1 of CH3 OH and 73.48 μ mol·h −1 ·g −1 of HCOOH. The mechanism of CO2 photoreduction process was gained by ESR and in-situ DRIFTS techniques. Graphical Abstract: ga1 Highlights: Ce-MOF was firstly reported to be heterostructured with Bi2MoO6 for photoreduction CO2. The electron-coupled enhanced interface was formed to strengthen photocatalytic activity. The strong interfacial interaction leads to the additional formation of formic acid.