Preparation and Characterization of CrO<sub>x</sub>/ZrO<sub>2</sub> with High Thermal Stability and High Specific Surface Area

In this work, a Ti -pillared montmorillonite with high thermal stability has been prepared by using a Na -montmorillonite as the host clay and polyhydroxy-titania ions as the pillaring precursor. The formation of Ti -pillared montmorillonite has been confirmed from the characterizations through X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric–differential scanning calorimeter, and specific surface area analyses. In the preparation of Ti -pillared montmorillonite several parameters, such as the type of solvent in which the synthesis is realized, the ratio of polyhydroxy-titania ions and montmorillonite, the intercalation time, the calcining temperature, and calcining time, were tested to understand their effects on the basal spacing. It was shown that this method could produce a Ti -pillared montmorillonite with the basal spacing of 3.74 nm, specific surface area of 409 m2/g, and mean pore size of 2.94 nm, as well as a high thermal stability up to 900°C.

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Preparation and Characterization of the Typical Pt-NSR Catalyst

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.412.365 ◽

2011 ◽

Vol 412 ◽

pp. 365-369

Author(s):

Yuan Feng Huang ◽

Wei Jun Zhang ◽

Li Shen ◽

Jin Hu ◽

Zhuo Heng Li ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Performance Testing ◽

High Specific Surface Area ◽

Impregnation Method ◽

Temperature Programmed Reduction ◽

Temperature Programmed ◽

Co Precipitation

A series of Ba-Al-O NSR supports and Pt/Ba-Al-O NSR catalysts are prepared by co-precipitation and impregnation method in this work. The catalyst and the support are characterized by XRD, SEM, SBET performance testing. The structure and texture of the supports is observed and discussed. The results of SBET indicate that the supports possess relative high specific surface area (94~110 m2/g). Temperature programmed reduction is characterized by means of H2-TPR.

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Advances of Graphene for Adsorption of Dyes in Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.804.89 ◽

2013 ◽

Vol 804 ◽

pp. 89-93

Author(s):

Jing Yi Yang ◽

Yu Qiong Chen ◽

Ying Chuan Ma ◽

Xin Zhang ◽

Ling Ling Luo ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Carbon Materials ◽

High Specific Surface Area ◽

High Thermal Stability ◽

Charge Carriers ◽

Functionalized Graphene ◽

Covalently Bonded ◽

Mobility Of Charge Carriers

Graphene is a fascinating new member of carbon materials with honeycomb and one-atom-thick structure, consisting of 2D hexagonal lattices of sp2 carbon atoms covalently bonded. Graphene has a huge theory specific surface area (over 2600 m2 g1), good thermal conductivity, high values of Youngs modulus and fracture strength, high thermal stability and chemical stability and fast mobility of charge carriers, etc.. In recent years, many researchers found graphene have outstanding adsorption capacity of dyes in aqueous solution due to its high specific surface area. This paper summarized the graphene, graphene oxide and functionalized graphene removing various dyes in wastewater.

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