A dual-functional metal phosphate for high proton conduction and selective luminescence turn-on sensing of Co2+ ions

CrystEngComm ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 2013-2019 ◽  
Author(s):  
Shu-Fang Zhou ◽  
Guo-Mei Wu ◽  
Tian Lin ◽  
Chen-Xi Zhang ◽  
Qing-Lun Wang
Keyword(s):  
Proton Conductivity ◽  
Composite Membrane ◽  
Proton Conduction ◽  
Metal Phosphate ◽  
Turn On ◽  
Dual Functional ◽  
High Proton

The {[Zn(H2PIPZ)](H2O)}n (compound 1) detects Co2+ ions with turn on fluorescent and proton conductivity of composite membrane 1@PVA10 is ten times higher than compound 1 at 98% RH and 353 K.

A dual-functional MOF for high proton conduction and sensitive detection of ascorbic acid

2020 ◽  
Vol 49 (41) ◽  
pp. 14490-14496
Author(s):  
Shu-Fang Zhou ◽  
Biao-Biao Hao ◽  
Tian Lin ◽  
Chen-Xi Zhang ◽  
Qing-Lun Wang
Keyword(s):  
Ascorbic Acid ◽  
Proton Conductivity ◽  
Proton Conduction ◽  
Sensitive Detection ◽  
Dual Functional ◽  
High Proton

A new Eu-MOF detects AA with turn off fluorescence and the proton conductivity of the Im@Eu-MOF is ten times higher than that of the En-MOF.

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 Functionality in metal–organic framework minerals: proton conductivity, stability and potential for polymorphism

2019 ◽  
Vol 10 (18) ◽  
pp. 4923-4929 ◽  
Author(s):  
Igor Huskić ◽  
Novendra Novendra ◽  
Dae-Woon Lim ◽  
Filip Topić ◽  
Hatem M. Titi ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Metal Organic Framework ◽  
Proton Conduction ◽  
High Proton ◽  
Metal Organic ◽  
Structure Retention ◽  
Organic Framework

Metal–organic framework minerals stepanovite and zhemchuzhnikovite can exhibit high proton conduction and structure retention on dehydration.

Facile Preparation of Well-Dispersed GO-SPEEK Composite Membranes by Electrospun for Fuel Cell Applications

2015 ◽  
Vol 1735 ◽  
Author(s):  
Xu Liu ◽  
Xiaoyu Meng ◽  
Chuanming Shi ◽  
Jiangbei Huo ◽  
Ziqing Cai ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Electrospinning Technique ◽  
Fuel Cell Application ◽  
High Proton ◽  
Poly Ether Ether Ketone ◽  
Direct Methanol

ABSTRACTGraphene oxide (GO) is one of the most attractive inorganic nanofillers in proton exchange membranes (PEMs) for its large specific surface area and high proton conductivity. The proton conductivity of GO nanosheet is known to be orders of magnitude greater than the bulk GO, thus it is essential to improve the dispersion of GO nanosheets in the PEM matrix to achieve higher conductivity. In this study, we report a facile and effective method to fabricate a GO/sulfonated poly ether ether ketone (SPEEK) composite membrane with well-dispersed GO nanosheets in SPEEK matrix by using electrospinning technique for direct methanol fuel cell application. The composite membrane exhibits improved proton conductivity, dimensional stability and methanol barrier property due to the presence of well-dispersed GOs. It is believed that the GO nanosheets can not only induce continuous channels for proton-conducting via Grotthuss mechanism, but also act as methanol barriers to hinder the methanol molecules from passing through the membrane.

A highly proton-conducting, methanol-blocking Nafion composite membrane enabled by surface-coating crosslinked sulfonated graphene oxide

2016 ◽  
Vol 52 (10) ◽  
pp. 2173-2176 ◽  
Author(s):  
Guangwei He ◽  
Xueyi He ◽  
Xinglin Wang ◽  
Chaoyi Chang ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxide Film ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Surface Coating ◽  
Nafion Membrane ◽  
Methanol Permeability ◽  
High Proton Conductivity ◽  
High Proton ◽  
Sulfonated Graphene

Coating an ultrathin graphene oxide film onto a Nafion membrane confers a distinct anti-tradeoff behavior: 93% decrease of methanol permeability while retaining the high proton conductivity.

Nafion – Azole Composite Membranes for High Temperature PEMFC

2014 ◽  
Vol 783-786 ◽  
pp. 1692-1697
Author(s):  
Je Deok Kim ◽  
Mun Suk Jun
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
High Temperature ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Room Temperature ◽  
Composite Membranes ◽  
Thermal And Mechanical Properties ◽  
High Proton Conductivity ◽  
High Proton

Nafion-azole (benzimidazole, 1,2,4-triazole, 1,2,3-triazole) composite membranes were prepared by room temperature and autoclave solution processing for high temperature (above 100 °C) PEMFC. Among the various Nafion – azole composite membranes, Nafion – 1,2,3-triazole membrane showed excellent flexibility, thermal stability, and homogeneous structure. Nafion – 1,2,4-triazole composite membrane had high thermal and mechanical properties, and also showed high proton conductivity of 0.02 S/cm at the temperature of 160 °C under dry (N2) condition.

scholarly journals Twist and sliding dynamics between interpenetrated frames in Ti-MOF revealing high proton conductivity

2020 ◽  
Vol 11 (15) ◽  
pp. 3978-3985 ◽  
Author(s):  
Jing Cao ◽  
Wenjie Ma ◽  
Kangjie Lyu ◽  
Lin Zhuang ◽  
Hengjiang Cong ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Proton Conduction ◽  
High Proton Conductivity ◽  
High Proton ◽  
Sliding Dynamics

Twist and sliding dynamics observed in a titanium catecholate MOF induced by imidazole for efficient proton conduction.

Effect of the ammonium ion on proton conduction in porous ionic crystals based on Keggin-type silicododecatungstate

2018 ◽  
Vol 74 (11) ◽  
pp. 1289-1294 ◽  
Author(s):  
Satoru Miyazawa ◽  
Reina Hosono ◽  
Ryota Osuga ◽  
Junko Nomura Kondo ◽  
Sayaka Uchida
Keyword(s):  
Activation Energy ◽  
Proton Conductivity ◽  
Proton Conduction ◽  
Ammonium Ion ◽  
Simple Method ◽  
Practical Applications ◽  
Grotthuss Mechanism ◽  
High Proton ◽  
Negative Charge Density ◽  
And Function

Proton conduction in crystalline porous materials has received much attention from basic scientific research through to practical applications. Polyoxometalates (POMs) can efficiently transport protons because of their small superficial negative charge density. A simple method for enhancing proton conductivity is to introduce NH4 + into the crystal structure, because NH4 + can form hydrogen bonds and function as a proton carrier. According to these considerations, NH4 + was introduced into the porous structure of A 2[Cr3O(OOCH)6(etpy)3]2[α-SiW12O40]·nH2O (A = Li, Na, K and Cs; etpy = 4-ethylpyridine) (I-A+ ) via topotactic cation exchange. The resulting compound, diammonium tris(4-ethylpyridine)hexaformatooxidotrichromium α-silicododecatungstate hexahydrate, (NH4)2[Cr3(CHO2)6O(C7H9N)3]2[α-SiW12O40]·6H2O, showed high proton conductivity and low activation energy under high relative humidity (RH), suggesting that protons migrate efficiently via rearrangement of the hydrogen-bonding network formed by the NH4 + cations and the waters of crystallization (Grotthuss mechanism). The proton conductivity and activation energy greatly decreased and increased, respectively, with the decrease in RH, suggesting that protons migrate as NH4 + and/or H3O+ under low RH (vehicle mechanism).

Preparation of Nafion/SiO2 Composite Membrane of Direct Ethanol Fuel Cell

2011 ◽  
Vol 464 ◽  
pp. 395-400 ◽  
Author(s):  
Hong Jun Ni ◽  
Can Can Lv ◽  
Cheng Jin Zhang ◽  
Ping Liao
Keyword(s):  
Proton Conductivity ◽  
Composite Membrane ◽  
Permeability Coefficient ◽  
High Water ◽  
Retention Performance ◽  
Direct Ethanol Fuel Cell ◽  
Weight Percentage ◽  
High Proton ◽  
Cross Section Spectrum ◽  
Sio2 Particles

Membranes are made by doping and modifying the Nafion117 with Nano-silica(SiO2). The penetration and the proton conductivity of composite membrane are studied through gas chromatograph and electrochemical workstation. With the help of cross-section spectrum, it shows that the SiO2 particles can penetrate the internal membrane and the weight percentage is greater than 0.1% after doping and modifying the membranes of Nafion117, so the SiO2 particles has a very good combination with the substrate. The membrane which is handled by Sol on 60°C has high proton conductivity and high water retention performance in high temperature. The permeability coefficient of membrane which is handled by Sol on 60°C and by the other ways are 4.07×10-4cm2/s and 8.13×10-4 cm2/s respectively. It shows that the permeability coefficient of ethanol membrane is reduced by half after the Nafion117 membrane is handled by Sol on 60°C.

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