The Structures of Copper-Doped Carbon Aerogels Prepared by an Ion Exchange Method

2001 ◽  
Vol 697 ◽  
Author(s):  
Noriko Yoshizawa ◽  
Ruowen Fu ◽  
Mildred S. Dresselhaus ◽  
Gene Dresselhaus ◽  
Joe Satcher ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Surface Area ◽  
Mass Density ◽  
High Surface ◽  
Nano Particles ◽  
Carbon Aerogels ◽  
Exchange Method ◽  
Surface Areas ◽  
Low Mass ◽  
Ion Exchange Method

AbstractAbstract -- The copper-doped carbon aerogels were fabricated by ion exchange method. Their structures were investigated by surface area detection, TEM, SEM and XPS. The experimental results showed that the copper-doped carbon aerogels produced have low mass density, a high density of nano-pores and high surface areas. Many copper nano-particles were produced after carbonization of copper-doped carbon aerogels. Before carbonization, part of the copper atoms were reduced into low valence compounds, such as Cu2O.

Tem Observation of Metal-Loaded Carbon Aerogels Prepared by an Ion-Exchange Method

2002 ◽  
Vol 388 (1) ◽  
pp. 75-80 ◽  
Author(s):  
Noriko Yoshizawa ◽  
Mildred S. Dresselhaus ◽  
Ruowen Fu ◽  
Joe Satcher ◽  
Ted Boumann
Keyword(s):  
Ion Exchange ◽  
Carbon Aerogels ◽  
Exchange Method ◽  
Ion Exchange Method

Formation of Zinc-Aluminium Layered Double Hydroxide-2,4,5-Tricholorophenoxybutyrate Nanocomposites by Ion Exchange Method

2013 ◽  
Vol 832 ◽  
pp. 374-378
Author(s):  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Mohd Zobir Hussein ◽  
Ri Hanum Yahaya Subhan ◽  
Siti Halimah Sarijo
Keyword(s):  
Ion Exchange ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Nitrogen Adsorption ◽  
Basal Spacing ◽  
Exchange Method ◽  
Type Iv ◽  
Ion Exchange Method ◽  
Double Hydroxide ◽  
Adsorption Desorption

The intercalation of herbicide, 2,4,5-tricholorophenoxybutyrate (TBA) , into zinc-aluminium-layered double hydroxide (ZAL) for the formation of a new nanocomposite ZAT, was accomplished via anion exchange method. Due to the intercalation of TBA with ZAL interlayer domain, basal spacing expanded from 8.9Å in the ZAL to 23.3 Å in the ZAT. The percentage loading of TBA in the ZAT is 45.5 % (w/w). The FTIR spectra of the nanocomposite shows resemblance peaks of the TBA and Zn-Al-layered double hydroxide indicating the inclusion of TBA into the layered double hydroxide. Surface area of the resulting nanocomposite increased from 1.3 to 15.6 m2g-1with the nitrogen adsorption-desorption of type IV, indicating the mesopore type of material.

scholarly journals Modification of acid on beta zeolite catalysts by ion-exchange method for ethanol dehydration to diethyl ether

2020 ◽  
Vol 10 (7) ◽  
pp. 697
Author(s):  
Montri Thapplee ◽  
Chadaporn Krutpijit ◽  
Piyasan Praserthdam ◽  
ฺีBunjerd Jongsomjit
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Surface Area ◽  
Diethyl Ether ◽  
Nitrate Solution ◽  
Beta Zeolite ◽  
Ethanol Conversion ◽  
Ethanol Dehydration ◽  
Exchange Method ◽  
Ion Exchange Method

<p class="Mabstract">The catalytic ethanol dehydration to diethyl ether (DEE) over the synthesized beta zeolite (BEA) with different acidity on catalysts having Na and mixed Na-H forms was studied. The Na form of BEA catalyst was synthesized via the hydrothermal process, including non-calcined (Na-BEA_N) and calcined (Na-BEA_C) catalysts. The Na-BEA_C catalyst was successively used in the synthesis of different mixed Na-H forms under the ion-exchange method using the ammonium nitrate solution at 70°C for 2 h/cycle. In the present study, two different cycles were chosen, including one cycle (M-BEA_1) and four cycles (M-BEA_4) to compare the amount of acidity on catalysts. The results indicated that the M-BEA_1 catalyst exhibited a large surface area and contained the highest moderate acid site, which strongly affected the optimal catalytic activity at low temperature (&lt;250°C) with ethanol conversion of 74.6% and DEE yield of 27.3%. However, the increased number of ion-exchange cycles had not shown remarkable effects on catalytic activity due to low surface area and moderate acidity.<strong></strong></p>

A highly efficient Fe-Ni-S/NF hybrid electrode for promoting oxygen evolution performance

2021 ◽  
Author(s):  
YuYun Chen ◽  
Yang Xu ◽  
Shuai Niu ◽  
Jun Yan ◽  
Ye-Yu Wu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Oxygen Evolution ◽  
Hierarchical Structure ◽  
Alkaline Solution ◽  
Exchange Method ◽  
Highly Efficient ◽  
Ion Exchange Method

In this study, a Fe-Ni-S/NF hybrid electrode with hierarchical structure was fabricated via a simple hydrothermal and ion exchange method, which exhibits remarkable OER performance in alkaline solution with an...

Preparation of BiOCl/Bi2S3 composites by simple ion exchange method for highly efficient photocatalytic reduction of Cr6+

2020 ◽  
Vol 506 ◽  
pp. 145000 ◽  
Author(s):  
Yun Lu ◽  
Jimei Song ◽  
Wenfang Li ◽  
Yali Pan ◽  
Huiyao Fang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Photocatalytic Reduction ◽  
Exchange Method ◽  
Highly Efficient ◽  
Ion Exchange Method
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