Publications by Qi Liu | EPFL Graph Search

Non-van-der-Waals Oriented Two-Dimensional UiO-66 Films by Rapid Aqueous Synthesis at Room Temperature

Wendy Lee Queen, Kumar Varoon Agrawal, Heng-Yu Chi, Qi Liu, Kuang-Jung Hsu, Kangning Zhao, Shuqing Song, Ranadip Goswami

The synthesis of MOFs in a two-dimensional (2D) film morphology is attractive for several applications including molecular and ionic separation. However, 2D MOFs have only been reported from structures that crystallize in lamellar morphology, where layers ...

2025

Realization of an atomic quantum Hall system in four dimensions

Qi Liu

Modern condensed matter physics relies on the concept of topology to classify matter, from quantum Hall systems to topological insulators. Engineered systems, benefiting from synthetic dimensions, can potentially give access to topological states predicted ...

American Association for the Advancement of Science2024

Method of preparation of ultrathin metal-organic frameworks & uses thereof

Kumar Varoon Agrawal, Qi Liu

The invention relates to methods for the preparation of ultrathin metal-organic frameworks (MOFs), in particular Zeolitic imidazolate frameworks (ZIFs) and uses thereof and resulting products thereof, in particular useful for the preparation of gas separat ...

2024

High-performance H2/CO2 separation from 4-nm-thick oriented Zn2(benzimidazole)4 films

Kumar Varoon Agrawal, Heng-Yu Chi, Qi Liu, Shuqing Song, Zongyao Zhou, Ranadip Goswami

High-performance membrane-based H2/CO2 separation offers a promising way to reduce the energy costs of precombustion capture. Current membranes, often made from two-dimensional laminates like metal-organic frameworks, have limitations due to complex fabric ...

2024

Method of preparation of ultrathin metal-organic frameworks & uses thereof

Kumar Varoon Agrawal, Qi Liu

The invention relates to methods for the preparation of ultrathin metal-organic frameworks (MOFs), in particular Zeolitic imidazolate frameworks (ZIFs) and uses thereof and resulting products thereof, in particular useful for the preparation of gas separat ...

2024

Towards ultrathin metal-organic frameworks membranes for high-performance separation

Kumar Varoon Agrawal, Heng-Yu Chi, Qi Liu, Shuqing Song, Ranadip Goswami

Research on metal-organic frameworks (MOFs) based membranes has gained a lot of attention in the last decade thanks to the unique and highly versatile chemistry of MOFs, which allows one to synthesize a variety of structural dimensions, topologies, pore si ...

Aip Publishing2023

Band engineering enhances the electrochemical properties by constructing TiO2 NRs-MoS2 NSFs flexible electrode

Qi Liu, Kangning Zhao

Research and development of flexible electrodes with high performance are crucial to largely determine the performance of flexible lithium-ion batteries (FLIBs) to a large extent. In this work, a flexible anode (TiO2 NRsMoS2 NSFs/CC) is rationally designed ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2023

Unit-cell-thick zeolitic imidazolate framework films for membrane application

Yu Han, Deepu Joseph Babu, Kumar Varoon Agrawal, Luis Francisco Villalobos Vazquez de la Parra, Heng-Yu Chi, Shaoxian Li, Qi Liu, Jian Hao, Shuqing Song

Zeolitic imidazolate frameworks (ZIFs) are a subset of metal-organic frameworks with more than 200 characterized crystalline and amorphous networks made of divalent transition metal centres (for example, Zn2+ and Co2+) linked by imidazolate linkers. ZIF th ...

NATURE PORTFOLIO2023

Unblocking Ion-occluded Pore Channels in Poly(triazine imide) Framework for Proton Conduction

Kumar Varoon Agrawal, Pascal Alexander Schouwink, Luis Francisco Villalobos Vazquez de la Parra, Heng-Yu Chi, Qi Liu, Kangning Zhao, Laura Piveteau

Poly(triazine imide) or PTI is an ordered graphitic carbon nitride hosting angstrom-scale pores attractive for selective molecular transport. AA'-stacked PTI layers are synthesized by ionothermal route during which ions occupy the framework and occlude the ...

Wiley-VCH Verlag GmbH2022

Mechanistic Study on Thermally Induced Lattice Stiffening of ZIF-8

Deepu Joseph Babu, Mehrdad Asgari, Wendy Lee Queen, Kumar Varoon Agrawal, Pascal Alexander Schouwink, Qi Liu, Jian Hao

The flexibility of the ZIF-8 aperture, which inhibits a molecular cutoff of 3.4 angstrom, can be reduced by rapid heat treatment to obtain CO2-selective membranes. However, the early stages of the structural, morphological, and chemical changes responsible ...

2021

Metal Soap Membranes for Gas Separation

Deepu Joseph Babu, Kumar Varoon Agrawal, Davide Campi, Qi Liu, Jian Hao

Metal soaps or metal alkanoates are metal-organic complexes held together with metal cations and the functional groups of hydrocarbon chains. They can be synthesized at a high yield by simply mixing the metal and organic sources, forming crystalline framew ...

2020

Synthesis of high-performance polycrystalline metal-organic framework membranes at room temperature in a few minutes

Deepu Joseph Babu, Kumar Varoon Agrawal, Heng-Yu Chi, Qi Liu, Jian Hao

The development of a rapid and reproducible crystallization route for the synthesis of polycrystalline metal-organic framework (MOF) films is attractive for the scalable production of nanoporous membranes on porous supports. Prior crystallization studies h ...

Royal Society of Chemistry2020