Room temperature adsorption of propene and propane on copper ions distributed in titanate nanotubes

Kanazawa, Yu; Itadani, Atsushi; Hashimoto, Hideki; Uematsu, Kazuyoshi; Toda, Kenji; Sato, Mineo

doi:10.1016/j.apsusc.2019.03.328

Cited by 8 publications

(5 citation statements)

References 61 publications

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“…Besides that, the silver incorporation to the NTs results in a solid with high crystallinity due to the organization of the monoclinic structure of the solid. Moreover, both inner and outer surfaces of NTs have negative charges, which allow the metals to be adsorbed on these surfaces [ 28 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…At 445 cm −1 , the Ti–O–Ti framework vibration is clearly visible [ 35 ]. Importantly, the band at 908 cm −1 has previously been correlated with the symmetric stretching vibration mode of a short Ti–O bond of sodium titanate in layer structure and the Ti–O–Na stretching vibration in the interlayer regions of the nanotube walls [ 25 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

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Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

et al. 2021

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Effects of the incorporation of Cr, Ni, Co, Ag, Al, Ni and Pt cations in titanate nanotubes (NTs) were examined on the NOx conversion. The structural and morphological characterizations evidenced that the ion-exchange reaction of Cr, Co, Ni and Al ions with the NTs produced catalysts with metals included in the interlayer regions of the trititanate NTs whereas an assembly of Ag and Pt nanoparticles were either on the nanotubes surface or inner diameters through an impregnation process. Understanding the role of the different metal cations intercalated or supported on the nanotubes, the optimal selective catalytic reduction of NOx by CO reaction (SCR) conditions was investigated by carrying out variations in the reaction temperature, SO2 and H2O poisoning and long-term stability runs. Pt nanoparticles on the NTs exhibited superior activity compared to the Cr, Co and Al intercalated in the nanotubes and even to the Ag and Ni counterparts. Resistance against SO2 poisoning was low on NiNT due to the trititanate phase transformation into TiO2 and also to sulfur deposits on Ni sites. However, the interaction between Pt2+ from PtOx and Ti4+ in the NTs favored the adsorption of both NOx and CO enhancing the catalytic performance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

et al. 2021

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“…metal ions on different porous materials (porous carbons, zeolites,MOFs,and POFs) and open metal sites in MOFs.In recent years,anumber of materials have been explored for propene/propane separation based on p-complexation and they have displayed efficient propene/propane separation performances:t he Ag I -decorated porous polyimide material MPI-Ag, [65d] MFU-4L with incorporated Cu I sites, [78] MIL-101(Cr) loaded with cuprous oxide nanoparticles,Cu I -loaded MIL-101(Fe), HCPs doped with Ag I ,a luminosilicates with calcium cations, [79] titanate nanotubes containing Cu I , [80] Ag Idoped microporous carbon, [64b] M-MOF-74 (M = Co,Mn, and Mg) with high densities of open metal sites, [81] AGTU-3a with open Ag I sites, [82] and many more.I na ddition to p-complexation, some other adsorbents based on the equilibrium mechanism have been developed as well. In 2019, Zhang et al synthesized the MOF MAF-23-O by selective aerobic oxidation of the soft methylene bridges of the organic ligands of MAF-23 (Figure 12).…”

Section: Methodsmentioning

confidence: 99%

Separation and Purification of Hydrocarbons with Porous Materials

Weckhuysen

2021

Angew Chem Int Ed

177

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This Minireview focuses on the developments of the adsorptive separation of methane/nitrogen, ethene/ethane, propene/propane mixtures as well as on the separation of C8 aromatics (i.e. xylene isomers) with a wide variety of materials, including carbonaceous materials, zeolites, metal–organic frameworks, and porous organic frameworks. Some recent important developments for these adsorptive separations are also highlighted. The advantages and disadvantages of each material category are discussed and guidelines for the design of improved materials are proposed. Furthermore, challenges and future developments of each material type and separation processes are discussed.

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“…Like ethene/ethane separation, a proportion of propene/propane separation in porous materials are based on π‐complexation between propene and metal ions on different porous materials (porous carbons, zeolites, MOFs, and POFs) and open metal sites in MOFs. In recent years, a number of materials have been explored for propene/propane separation based on π‐complexation and they have displayed efficient propene/propane separation performances: the Ag I ‐decorated porous polyimide material MPI‐Ag, [65d] MFU‐4L with incorporated Cu I sites, [78] MIL‐101(Cr) loaded with cuprous oxide nanoparticles, Cu I ‐loaded MIL‐101(Fe), HCPs doped with Ag I , aluminosilicates with calcium cations, [79] titanate nanotubes containing Cu I , [80] Ag I ‐doped microporous carbon, [64b] M‐MOF‐74 (M=Co, Mn, and Mg) with high densities of open metal sites, [81] AGTU‐3a with open Ag I sites, [82] and many more. In addition to π‐complexation, some other adsorbents based on the equilibrium mechanism have been developed as well.…”

Section: Olefin–paraffin Separationmentioning

confidence: 99%

Separation and Purification of Hydrocarbons with Porous Materials

Weckhuysen

2021

Angewandte Chemie

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is currently a postdoctoral researcher in Prof. Weckhuysen's group at Utrecht University. She received her PhD degree in Industrial Catalysis from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences (2020) under the direction of Prof. Yunpeng Xu and Prof. Zhongmin Liu. Her current research interests include developing MOF thin films for ethene polymerization and gas adsorption. Bert M. Weckhuysen obtained his PhD degree from K. U. Leuven (Belgium) in 1995. After postdoctoral stays at Lehigh University (PA, USA) and Texas A&M University (TX, USA), he became full Professor at Utrecht University (The Netherlands) in 2000. His research focuses on the development and use of in situ and operando spectroscopy for studying solid catalysts under realistic reaction conditions at different length scales. Scheme 1. Timeline summarizing the trends in adsorptive hydrocarbon separation and purification with various porous materials over the latest three decades.

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Room temperature adsorption of propene and propane on copper ions distributed in titanate nanotubes

Cited by 8 publications

References 61 publications

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

Separation and Purification of Hydrocarbons with Porous Materials

Separation and Purification of Hydrocarbons with Porous Materials

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