A rare 4-connected neb-type 3D chiral polyoxometalate framework based on {KNb24O72} clusters

2020 ◽  
Vol 7 (20) ◽  
pp. 3919-3924
Author(s):  
Zeng-Kui Zhu ◽  
Li-Dan Lin ◽  
Jing Zhang ◽  
Xin-Xiong Li ◽  
Yan-Qiong Sun ◽  
...  
Keyword(s):  
Water Vapor ◽  
High Water ◽  
Proton Conduction ◽  
Water Vapor Adsorption ◽  
Adsorption Properties ◽  
Vapor Adsorption

A rare 3D porous chiral polyoxoniobate framework has been constructed from two types of isomeric {Cu(en)2KNb24O72} clusters with a 4-connected neb-type topology. This compound exhibits proton conduction and high water vapor adsorption properties.

scholarly journals CO2 and water vapor adsorption properties of framework hybrid W-ZSM-5/silicalite-1 prepared from RHA

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24642-24652
Author(s):  
Yisong Wang ◽  
He Jia ◽  
Xin Fang ◽  
Ziyang Qiu ◽  
Tao Du
Keyword(s):  
Water Vapor ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Water Vapor Adsorption ◽  
Adsorption Properties ◽  
Raw Material ◽  
Vapor Adsorption ◽  
Hydrothermal Methods

Framework hybrid W-ZSM-5 and W-silicalite-1 zeolites were synthesized by hydrothermal methods using rice husk ash (RHA) as a silicon raw material.

A water-stable Ni(ii) diphosphonate exhibiting water vapor adsorption and water-assisted high proton conductivity

2019 ◽  
Vol 43 (2) ◽  
pp. 807-812 ◽  
Author(s):  
Hailong Xu ◽  
Lu Feng ◽  
Wentao Huang ◽  
Qiaoyun Wang ◽  
Hong Zhou
Keyword(s):  
Thermal Properties ◽  
Water Vapor ◽  
Proton Conductivity ◽  
Proton Conduction ◽  
Water Vapor Adsorption ◽  
Water Stability ◽  
High Proton Conductivity ◽  
Vapor Adsorption ◽  
High Proton

A new nickel phosphonate has been synthesized, and its thermal properties, water stability, water vapor adsorption and proton conduction have been investigated.

scholarly journals Water Vapor Adsorption Properties of Honeycomb-Type Zeolites for Tritium Removal Systems

2011 ◽  
Vol 6 ◽  
pp. 2405038-2405038 ◽  
Author(s):  
Masahiro TANAKA ◽  
Tatsuhiko UDA ◽  
Kenzo MUNAKATA
Keyword(s):  
Water Vapor ◽  
Water Vapor Adsorption ◽  
Adsorption Properties ◽  
Vapor Adsorption

The Role of Water Loading and Germanium Content in Germanosilicate Hydrolysis

2021 ◽  
Author(s):  
Mengting Jin ◽  
Ondřej Veselý ◽  
Christopher Heard ◽  
Martin Kubů ◽  
Petr Nachtigal ◽  
...  
Keyword(s):  
Water Vapor ◽  
Hydrolytic Stability ◽  
High Water ◽  
Water Vapor Adsorption ◽  
Ab Initio Molecular Dynamics ◽  
Germanium Content ◽  
Water Loading ◽  
Vapor Adsorption ◽  
Partial Pressures ◽  
Dynamics Simulations

New zeolitic frameworks can be prepared through the Assembly-Disassembly-Organisation-Reassembly (ADOR) process by exploiting the lability of Ge-O bonds in germanosilicate zeolites to control their hydrolysis. In the disassembly step, two key factors are water and germanium content, but their exact roles remain unknown. Nevertheless, we combined experimental water-vapor adsorption with first principles simulations to identify the mechanism of germanosilicate zeolite disassembly. The results showed that water vapor adsorption on <b>UTL</b> germanosilicate proceeds in reversible (at low partial pressures) and irreversible (at higher partial pressures) modes. Based on our ab initio molecular dynamics simulations, we related these two modes to weak physisorption at low water loading and to reactive transformations at high water loading, via collective mechanisms requiring high local water concentrations. This bimodal behavior also depends on the germanium content as high Ge-content further decreases <b>UTL</b> hydrolytic stability by opening up yet another low-energy disassembly pathway at high water loading. Overall, we discovered, verified and explained the mechanisms of <b>UTL</b> disassembly and its factors. These findings will likely be generalized to other ADORable germanosilicate zeolites and help to find the optimal protocol for the synthesis of new zeolites.

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