Adjusting accommodation microenvironment for Cu+ to enhance oxidation inhibition for thiophene capture

Yu Xia Li, Meng Meng Jin, Shu Shi, Shi Chao Qi, Xiao Qin Liu, Lin Bing Sun

科研成果: 期刊稿件文章同行评审

24 引用 (Scopus)

摘要

Cu+-containing materials have great potentials in various applications like adsorptive desulfurization. Nevertheless, their applications are severely obstructed by poor stability of Cu+ in air. Here, we first clarify the mechanism of Cu+ oxidation by first-principle calculations and demonstrate that moisture accelerates Cu+ oxidation dramatically. Then, the microenvironment of Cu2O-modified HKUST-1, a typical metal-organic framework, is adjusted from hydrophilic to hydrophobic with polydimethylsiloxane coating (producing Cu2O@HK@P). This isolates moisture from pores and enhances the stability of Cu+ significantly even under oxygen atmosphere. Cu+ in Cu2O@HK@P preserves well after exposed to air for 6 months, while Cu2O@HK lose almost all Cu+ for 2 weeks. The optimal Cu2O@HK@P can remove 540 μmol g−1 of thiophene from hydrous fuel, which is much superior to Cu2O@HK (227 μmol g−1) and most reported adsorbents. Our strategy can also be applied to stabilize Cu+ in various materials including zeolite, mesoporous silica, and activated carbon.

源语言英语
文章编号e17368
期刊AIChE Journal
67
10
DOI
出版状态已出版 - 10月 2021

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