scholarly journals Characterization and Thermal Stability Properties of Bulk Hierarchical Porous Pd Prepared by Kirkendall Effect and Dealloying Method

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Wei Feng ◽  
Qingquan Kong ◽  
Xiaodong Zhu ◽  
Xinxin Xie ◽  
Huajiang Zhou ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Aqueous Solution ◽  
Noble Metal ◽  
Kirkendall Effect ◽  
Channel Structure ◽  
Small Surface ◽  
Stability Properties ◽  
Compression Properties ◽  
Hierarchical Porous ◽  
Ligament Size

We present a facile strategy to synthesize bulk hierarchical porous Pd materials (BHPPd) with pores ranging from a few nanometers to tens of micrometers through chemical dealloying of porous PdAl intermetallics. Owing to the small surface diffusivities of Pd atoms, the pore/ligament size of BHPPd did not coarsen remarkably as the concentration of HCl aqueous solution increases. Thermal stability properties of BHPPd materials at different temperature ranging from 673 to 1073 K were evaluated. BHPPd materials show superior thermal stability, whose bicontinuous interpenetrating ligament-channel structure can be maintained even after being annealed at 1073 K for 30 min. Such properties can be attributed to less defects and less-noble metal residues. Moreover, compression properties of BHPPd materials were also investigated.

scholarly journals Pore and ligament size control, thermal stability and mechanical properties of nanoporous single crystals of gold

Nanoscale ◽  
2017 ◽  
Vol 9 (38) ◽  
pp. 14458-14466 ◽  
Author(s):  
Maria Koifman Khristosov ◽  
Shiri Dishon ◽  
Imrit Noi ◽  
Alex Katsman ◽  
Boaz Pokroy
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Single Crystals ◽  
Size Control ◽  
Nanoporous Gold ◽  
Ligament Size

Thermal stability and mechanical properties investigation of nanoporous gold single crystals.

scholarly journals Thermal behaviour study of solid state compounds of manganese (II), zinc (II) and lead (II) with cinnamic acid

1998 ◽  
Vol 23 (0) ◽  
pp. 09-16
Author(s):  
Marco Aurélio da Silva CARVALHO FILHO ◽  
Massao IONASHIRO
Keyword(s):  
Thermal Stability ◽  
Aqueous Solution ◽  
Differential Scanning Calorimetry ◽  
Cinnamic Acid ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Manganese Zinc ◽  
Behaviour Study ◽  
Derivative Thermogravimetry

Compounds of cinnamic acid with manganese, zinc and lead have been prepared in aqueous solution. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction and complexometry have been used in the characterization as well as in the study of the thermal stability and interpretation concerning the thermal decomposition.

scholarly journals Efficient Removal of Cr(VI) from Aqueous Solution on the Hierarchical Porous N-Doped Carbon Derived from Soft Wood

2019 ◽  
Vol 5 (2) ◽  
pp. 180024-180024 ◽  
Author(s):  
Ruiqi Li ◽  
Ruiqi Li ◽  
Wei Shi ◽  
Yiran Lu ◽  
Di Hu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Efficient Removal ◽  
Hierarchical Porous

Synthesis, characterization, and thermal stability properties of PVTNP-co-PVAA through the azidoacetylation of polyvinyl 2,4,6-trinitrophenylacetal

2013 ◽  
Vol 22 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Bo Jin ◽  
Juan Shen ◽  
Rufang Peng ◽  
Yuanjie Shu ◽  
Shijin Chu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Stability Properties

KARBON LİF ÜRETİMİNDE POLİAKRİLONİTRİL ELYAFLARIN TERMAL OKSİDASYONU

2021 ◽  
Vol 8 (17) ◽  
pp. 160-170
Author(s):  
Mahbubor Rahman ◽  
Tuba DEMIREL ◽  
Ismail KARACAN
Keyword(s):  
Thermal Stability ◽  
Aqueous Solution ◽  
Thermal Oxidation ◽  
Oxidation Process ◽  
Ammonium Persulfate ◽  
Oxidation Reactions ◽  
Carbon Yield ◽  
Thermal Stability Of ◽  
Pan Fibers

Thermal oxidation of polyacrylonitrile (PAN) fibers was accomplished at temperatures up to 250°C for different oxidation times. Chemical integration of PAN fibers with an aqueous solution of ammonium persulfate was performed before starting thermal oxidation. The results recommend that ammonium persulfate integration enhanced the oxidation reactions of the PAN fibers and resulting in enhanced thermal stability. Ammonium persulfate impregnation followed by the oxidation process in the air environment leads to significant deviations in the characteristics of PAN fibers. To perform structural characterization of the raw and ammonium persulfate (APS) incorporated and stabilized samples, XRD, IR-spectroscopy, TGA was executed in this study. Investigation of the XRD and infrared spectroscopy outcomes recommended quick aromatization reactions with growing oxidation periods. The TGA traces indicated a comparative enhancement in the thermal stability of the PAN fibers by the increased carbon yield with the rise of the oxidation time. The overall findings recommend that ammonium persulfate incorporation was very influential in stimulating the oxidation process.

Effect of hybrid carbon black/lignin on rheological, mechanical and thermal stability properties of NR/BR composites

2021 ◽  
pp. 1-13
Author(s):  
Nor Anizah Mohamad Aini ◽  
Nadras Othman ◽  
M. Hazwan Hussin ◽  
Kannika Sahakaro ◽  
Nabil Hayeemasae
Keyword(s):  
Thermal Stability ◽  
Carbon Black ◽  
Stability Properties ◽  
Hybrid Carbon
Sign in / Sign up

Export Citation Format

Share Document