Synthesis of Al2TiO5 and its effect on the properties of chitosan–NH4SCN polymer electrolytes

Hassan, F.; Woo, Hyung‐June; Aziz, N.; Kufian, M.Z.; Majid, S.R.

doi:10.1007/s11581-012-0763-3

Cited by 15 publications

(9 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Proton conductivity is also possible if the proton donors are introduced into the CS matrix, which may be achieved by mixing different acids, heteropolyacids, and acid salts, − by introducing inorganic fillers, such as acidic oxide particles − and ammonium salts, − and grafting acidic groups to the main CS chain . Proton conductivity occurs via both transport mechanisms and the Grotthuss-type mechanism. , The additives typically increase the conductivity but compromise the mechanical properties.…”

Section: Non-nafion Spementioning

confidence: 99%

Review of Advanced Materials for Proton Exchange Membrane Fuel Cells

2014

View full text Add to dashboard Cite

The scientific community is focused on the development of inexpensive and high-performing membrane materials for proton exchange membrane (PEM) fuel cells (FCs). The major approach to reducing the cost of FCs, which is crucial for the widespread acceptance of FCs as energy sources for various practical applications, is reducing the cost of the membrane. Efforts are being made in the development of advanced polymeric materials, which will satisfy the technical and economic demands of the consumers. Because most alternative membranes are outperformed by Nafion membranes over an entire set of important properties, it may be worthwhile to compromise on certain parameters to develop alternative specialized membranes. This review presents the properties (mainly conductivity and chemical and mechanical stability) of modern solid polymer electrolytes (SPEs) for PEM FCs.

show abstract

Section: Non-nafion Spementioning

confidence: 99%

Review of Advanced Materials for Proton Exchange Membrane Fuel Cells

2014

View full text Add to dashboard Cite

show abstract

“…From Figure 3 c, notably, the obtained porous carbons had little mass loss even at 1200 °C and this proved that upon pyrolyzing, the porous carbons possessed very great thermal stability under inert atmosphere. As for the FT-IR patterns of N/R-2.54 sample before and after pyrolyzing in Figure 3 d, the characteristic band ascribed to –SCN at about 2050 cm −1 vanished after pyrolyzing, which suggested that no NH 4 SCN salts existed throughout carbonization [ 32 , 33 ]. Figure 3 e,f show the EDS analyses.…”

Section: Resultsmentioning

confidence: 99%

Self-Sacrificial Salt Templating: Simple Auxiliary Control over the Nanoporous Structure of Porous Carbon Monoliths Prepared through the Solvothermal Route

Zhang

Feng

Liu³

et al. 2018

Nanomaterials

View full text Add to dashboard Cite

The conventional sol-gel method for preparing porous carbons is tedious and high-cost to prepare porous carbons and the control over the nanoporous architecture by solvents and carbonization is restricted. A simple and novel self-sacrificial salt templating method was first presented to adjust the microporous structure of porous carbon monoliths synthesized via the solvothermal method. Apart from good monolithic appearance, the solvothermal route allowed for ambient drying because it made sure that the polymerization reaction was completed quickly and thoroughly. The intact and crack-free porous carbon monoliths were investigated by scanning electron microscopy (SEM), thermogravimetric differential scanning calorimetry (TG-DSC), Fourier transform infrared (FT-IR), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and nitrogen sorption measurements. It was proven that the self-sacrificial salts NH4SCN had been removed during pyrolyzing and so, porous carbon monoliths could be directly obtained after carbonization without the need of washing removal of salts. Most importantly, the microporous specific surface area of the resultant porous carbon monoliths was dramatically increased up to 770 m2/g and the Brunauer–Emmett–Teller (BET) specific surface area was up to 1131 m2/g. That was because the salts NH4SCN as self-sacrificial templating helped to form more around 0.6 nm, 0.72 nm and 1.1 nm micropores. The self-sacrificial salt templating is also a suitable and feasible method for controlling the nanoporous structure of other porous materials.

show abstract

“…) 1,21–23 into aluminum titanate ceramic, on the one hand, can form solid solutions such as Al 2 TiO 5 ‐MgTi 2 O 5, 24 and reduce octahedral distortion, then can stabilize the aluminum titanate lattice to a certain extent, and improve its thermal stability. On the other hand, because the formation of magnesium titanate crystal nuclei reduces the activation energy, 9 it is conducive to the formation of aluminum titanate crystal nuclei, which can reduce the sintering temperature 25,26 . Moreover, aluminum titanate has high thermal expansion anisotropy (α a ≈ 11 × 10 −6 K −1 , α b ≈ 21 × 10 −6 K −1 , α c ≈ −3 × 10 −6 K −1 ), 27 which produces a large number of microcracks during the cooling process, resulting in low mechanical strength 28,29 .…”

Section: Introductionmentioning

confidence: 99%

“…Aluminum titanate ceramic has excellent physical and chemical properties, such as low thermal expansion coefficient (∼1 × 10 −6 K −1 ), 1,2 low thermal conductivity (1.5-2.5 W⋅(m⋅K) −1 ), 3,4 high thermal shock resistance (500 Wm −1 ), 5 high melting point (∼1860 • C), [6][7][8] high temperature resistance (can work for a long time at 1400 • C), good corrosion resistance (resistance to refractory metals such as copper, aluminum water, molten iron). 9,10 Because of above excellent properties, it has a broad application prospect as a structural ceramic in the field of high tem-perature, such as, refractories for the molten aluminum alloy industry, 11,12 diesel particulate filters, 13 automobile exhaust purification catalyst carriers. 1,7 Although aluminum titanate ceramic has excellent thermal shock resistance, 14,15 it also has two disadvantages that limit its industrial application.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, because the formation of magnesium titanate crystal nuclei reduces the activation energy, 9 it is conducive to the formation of aluminum titanate crystal nuclei, which can reduce the sintering temperature. 25,26 Moreover, aluminum titanate has high thermal expansion anisotropy (α a ≈ 11 × 10 27 which produces a large number of microcracks during the cooling process, resulting in low mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamic properties of aluminum titanate‐mullite composite ceramics containing heat stabilizer

Huang

Yang

Wang

2023

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Using Al 2 O 3 and TiO 2 as raw materials, adding MgO as heat stabilizer and mullite as enhancer, aluminum titanate-mullite multiphase ceramics were successfully prepared by solid phase synthesis. The effects of MgO and mullite were systematically studied on the phase composition, microstructure, thermal stability, sintering properties, and mechanical properties of aluminum titanate ceramics. The results showed that the introduction of Mg 2+ can partially replace Al 3+ to form Mg x Al 2(1-x) Ti (1+x) O 5 solid solution, improved the thermal stability of aluminum titanate ceramics, and promoted the formation and growth of grains, which reduced the sintering temperature. The crack deflections caused by mullite particles improved the mechanical properties. The filling effect of mullite particles and the formation of silica in mullite raw materials were conducive to ceramic densification. The statistics of Mg4M10 sample were as follows: the porosity was only 2.9%, the flexural strength was as high as 64.15 MPa, and the thermal expansion coefficient was 1.35 × 10 −6 K −1 (RT-700 • C), encouraging the application of ceramics with high thermal mechanical properties.

show abstract

Synthesis of Al2TiO5 and its effect on the properties of chitosan–NH4SCN polymer electrolytes

Cited by 15 publications

References 38 publications

Review of Advanced Materials for Proton Exchange Membrane Fuel Cells

Review of Advanced Materials for Proton Exchange Membrane Fuel Cells

Self-Sacrificial Salt Templating: Simple Auxiliary Control over the Nanoporous Structure of Porous Carbon Monoliths Prepared through the Solvothermal Route

Thermodynamic properties of aluminum titanate‐mullite composite ceramics containing heat stabilizer

Contact Info

Product

Resources

About