Simultaneous fabrication of bifunctional Cu(<scp>i</scp>)/Ce(<scp>iv</scp>) sites in silica nanopores using a guests-redox strategy

Yu, Yin; Zhu, Jing; Liu, Xiaoqin; Tan, Peng; Xue, Ding-Ming; Xing, Zhimin; Sun, Lin

doi:10.1039/c6ra14091b

Cited by 17 publications

(13 citation statements)

References 29 publications

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“…Mesoporous silica SBA-15 is widely studied in the fields of catalysis 24 – 26 , gas separation 27 – 30 , drug delivery 31 , 32 , and energy storage 33 , 34 . It is of great interest for use as a support to disperse heterogeneous noble metal nanoparticles, due to its ordered pore structure, high surface area and large pore volume 35 – 39 .…”

Section: Introductionmentioning

confidence: 99%

Modification of as Synthesized SBA-15 with Pt nanoparticles: Nanoconfinement Effects Give a Boost for Hydrogen Storage at Room Temperature

Yang

Wen

et al. 2017

Sci Rep

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In this work, Pt nanoparticles were incorporated into SBA-15 to prepare the materials for hydrogen spillover adsorption. We provide a direct modification (DM) strategy to improve the content of Pt nanoparticles inside the channels of SBA-15. In this strategy, the Pt precursor was directly incorporated into as synthesized SBA-15 by a solid-state grinding method. The subsequent calcination in air, then H2/Ar gases was conducted to obtain the resultant materials of PtAS. For the samples of PtAS, Pt nanoparticles up to 5.0 wt% have a high dispersion inside the channels of SBA-15. The size of nanoparticles is in control of 3.7 nm. Although much work so far has focused on modification of SBA-15 with Pt nanoparticles. Here, it is the first time the loading amount of Pt nanoparticles raises up to 5.0 wt%, and the location of the Pt nanoparticles is interior channels of SBA-15. We reveal that the high dispersion behaviors of Pt nanoparticles are ascribed to the nanoconfinement effects provided by as synthesized SBA-15. However, the samples derived from template free SBA-15 (PtCS) show sparsely dispersion of Pt nanoparticles with the size of 7.7 nm. We demonstrate that the PtAS samples show better hydrogen adsorption performance than PtCS.

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Section: Introductionmentioning

confidence: 99%

Modification of as Synthesized SBA-15 with Pt nanoparticles: Nanoconfinement Effects Give a Boost for Hydrogen Storage at Room Temperature

Yang

Wen

et al. 2017

Sci Rep

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“…are always incorporated into the porous materials for fabrication of p complexation or direct S-M sites. It is known that the porous materials with high surface areas are highly desirable for loading active species (Li et al, 2016;Xiao et al, 2013b;Yin et al, 2016). In addition, it is demonstrated in a number of studies that key to the adsorption performance of the adsorbent is the status of supported active species (Herna´ndez-Maldonado and Yang, 2004b;Song et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Functionalization of SBA-15 with CeO₂ nanoparticles for adsorptive desulfurization: Matters of template P123

Wen

Liu

et al. 2017

Adsorption Science & Technology

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Adsorption is one of the most promising methods for desulfurization of transportation fuels, due to the strategy which enables removal of organic sulfur compounds to be conducted at ambient conditions with high efficiency. Adsorbent is the key to the adsorptive performance. Both p complexation and direct sulfur metal bonds are efficient methods for adsorptive desulfurization. For construction of these bonds, it is necessary to introduce active metal species on the support. In this work, Ce(NO 3 ) 2 was directly introduced into the assynthesized SBA-15, and high dispersion of CeO 2 nanoparticles was obtained. With the loading content of 12-46 wt%, the particle sizes of the CeO 2 NPs are in the range of 4.4-6.3 nm. The good dispersion status of CeO 2 nanoparticles is contributed to the template P123 preserved in as-synthesized SBA-15, which provides a confined space for the dispersion of CeO 2 nanoparticles. However, the large CeO 2 particles (7.0 nm) are formed for the sample originated from templatefree SBA-15. We also demonstrate that the adsorptive performance of SBA-15 is enhanced with the modification of CeO 2 nanoparticles. Besides, the performances of CeO 2 nanoparticlemodified samples stay in step with the dispersion status of the CeO 2 nanoparticles.

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“…To develop efficient adsorbents for olefin/paraffin separation, transition metal ions including Ag(I) and Cu(I) have been incorporated into porous materials because they can make special π‐complexation with olefin species 4 . Cu(I) ions are regarded as the most promising transition metal because they are cheap and readily available 19,20 . An issue for developing Cu(I)‐incorporated adsorbents is that high calcination temperatures or external reducing agents are needed to reduce Cu(II) ions into Cu(I) ions 21 .…”

Section: Introductionmentioning

confidence: 99%

“…4 Cu(I) ions are regarded as the most promising transition metal because they are cheap and readily available. 19,20 An issue for developing Cu(I)incorporated adsorbents is that high calcination temperatures or external reducing agents are needed to reduce Cu(II) ions into Cu(I) ions. 21 Such high-temperature calcinations are not proper for MOFs, which could be thermally decomposed at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Facile Cu(I) Loading for Adsorptive C₃H₆/C₃H₈ Separation Through Double Cu(II) Salts Incorporation Within Pores With Unsaturated Fe(II) Sites

Han

Kim

et al. 2021

Bulletin Korean Chem Soc

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Developing an effective adsorbent for olefin/paraffin separation is a crucial and challenging issue. We have developed an olefin‐selective adsorbent by loading two different Cu(II) salts (CuCl2 and Cu(CH3COO)2) within an iron‐based metal–organic framework (MOF) and reduced them to Cu(I) species without a high‐temperature calcination and an external reducing agent. The successful development of Cu(I)‐loaded MOFs was confirmed by characterizations including scanning electron microscope/energy dispersive X‐ray spectroscopy, X‐ray photoelectron spectroscopy, powder X‐ray diffraction, and Brunauer–Emmett–Teller analyses. From the comparisons between Cu(I)‐loaded MOFs degassed at two different temperatures, we confirmed that the unsaturated Fe(II) sites within the iron‐based MOF can enhance the stability of formed Cu(I) species and thus improve the C3H6/C3H8 selectivity. The resulted Cu(I)‐loaded MOF shows large C3H6 uptake (5.15 mmol/g) and high C3H6/C3H8 selectivity (8.9) at 100 kPa and 293 K.

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Simultaneous fabrication of bifunctional Cu(i)/Ce(iv) sites in silica nanopores using a guests-redox strategy

Abstract: The bifunctional materials prepared using a guests-redox strategy show excellent performance in gas separation of C2H4 from C2H6.

Cited by 17 publications

References 29 publications

Modification of as Synthesized SBA-15 with Pt nanoparticles: Nanoconfinement Effects Give a Boost for Hydrogen Storage at Room Temperature

Modification of as Synthesized SBA-15 with Pt nanoparticles: Nanoconfinement Effects Give a Boost for Hydrogen Storage at Room Temperature

Functionalization of SBA-15 with CeO₂ nanoparticles for adsorptive desulfurization: Matters of template P123

Facile Cu(I) Loading for Adsorptive C₃H₆/C₃H₈ Separation Through Double Cu(II) Salts Incorporation Within Pores With Unsaturated Fe(II) Sites

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Simultaneous fabrication of bifunctional Cu(i)/Ce(iv) sites in silica nanopores using a guests-redox strategy

Abstract: The bifunctional materials prepared using a guests-redox strategy show excellent performance in gas separation of C2H4 from C2H6.

Cited by 17 publications

References 29 publications

Modification of as Synthesized SBA-15 with Pt nanoparticles: Nanoconfinement Effects Give a Boost for Hydrogen Storage at Room Temperature

Modification of as Synthesized SBA-15 with Pt nanoparticles: Nanoconfinement Effects Give a Boost for Hydrogen Storage at Room Temperature

Functionalization of SBA-15 with CeO2 nanoparticles for adsorptive desulfurization: Matters of template P123

Facile Cu(I) Loading for Adsorptive C3H6/C3H8 Separation Through Double Cu(II) Salts Incorporation Within Pores With Unsaturated Fe(II) Sites

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Functionalization of SBA-15 with CeO₂ nanoparticles for adsorptive desulfurization: Matters of template P123

Facile Cu(I) Loading for Adsorptive C₃H₆/C₃H₈ Separation Through Double Cu(II) Salts Incorporation Within Pores With Unsaturated Fe(II) Sites