Preparation and Characterization of Anatine TiO2/Expanded Graphite with High Expansion Volume

The composites of expanded ghaphite with TiO2(EG/TiO2) have been prepared in the method of precursor mixing, and the optimum preparation conditions have been studied. The morphology and crystal structure of the EG/TiO2composites have been characterized by the means of SEM and XRD. Also their performance of decolorization for methyl orange solution has been researched. The results are shown as follows: the EG/TiO2composites maintain the rich porous and network structure of EG, and a lot of anatase TiO2particles widely distribute on surfaces and in layers of EG. Compared with TiO2sol, taking tetrabutyl titanate as titanium source, the prepared EG/TiO2composites have better performance. Increasing the added amount of tetrabutyl titanate, the decolorization rate of methyl orange solution increases at first, and then decreases. When adding 2 mL tetralbutyl titanate, the decolorization rate is at the peak, up to 98.4%. These results show the composites have excellent performance of decolorization for methyl orange solution. We suppose it is mainly due to the interaction between the adsorption of EG and the degradation of TiO2particles.

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Preparation and characterization of phenolic foam reinforced with expandable graphite and expanded graphite

Journal of Cellular Plastics ◽

10.1177/0021955x17707755 ◽

2017 ◽

Vol 54 (3) ◽

pp. 545-559 ◽

Cited By ~ 1

Author(s):

Kejing Yu ◽

Xia Luo ◽

Menglei Wang ◽

Kun Qian

Keyword(s):

Mechanical Properties ◽

Expanded Graphite ◽

Expandable Graphite ◽

Test Results ◽

Compressive Test ◽

Compression Performance ◽

Phenolic Foam ◽

Mean Diameter ◽

The Mean

In this paper, two kinds of phenolic foams modified with expandable graphite and expanded graphite were prepared and the effect of particles on the mechanical properties and structure of the foams has been discussed. The mechanical properties, density and morphology of reinforced phenolic foams were studied. The images of scanning electron microscope showed that the size of the modified phenolic foams was smaller and more complete. The mean diameter of the expanded graphite-reinforced phenolic foams was smaller than that of the expandable graphite-reinforced phenolic foams due to the specific surface area of the expanded graphite. The compressive test results showed that the expandable graphite and expanded graphite could enhance the mechanical properties of the foams obviously. And the smaller cell size of the expanded graphite-reinforced foams provided them better mechanical properties. When the addition of the reinforcement reached to 0.8 wt%, the reinforced phenolic foams showed the best compression performance. The compressive strength and modulus with the 0.8 wt% expandable graphite were increased by 70% and 48% and that with the 0.8 wt% expanded graphite were increased by 80% and 69%.

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Preparation of Expanded Graphite Using Recycling Graphite Rods by Microwave Irradiation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.2356 ◽

2012 ◽

Vol 610-613 ◽

pp. 2356-2360

Author(s):

Hong Liang Hua ◽

Yun Wang ◽

Yu Jia Wang ◽

Shi Jun Ruan ◽

Chao Zeng ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Potassium Dichromate ◽

Expanded Graphite ◽

Chemical Oxidation ◽

Raw Material ◽

Expandable Graphite ◽

Graphite Rods ◽

Scanning Electron

After washing, milling and calcining, the graphite rods recycled from waste dry batteries were used as raw material to prepare expandable graphite by chemical oxidation (using acetic anhydride as inserting and potassium dichromate as oxidant), the expanded graphite was prepared from the obtained expandable graphite by microwave radiation (MW) at 1000W for 60s.The characterization of infrared spectroscopy (IR) and scanning electron microscopy (SEM) of obtained expanded graphite have been discussed. The results show that it is feasible to prepare expanded graphite using graphite rods recycled from waste dry batteries.

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Preparation and characterization of stearic acid/expanded graphite composites as thermal energy storage materials

Energy ◽

10.1016/j.energy.2010.09.046 ◽

2010 ◽

Vol 35 (12) ◽

pp. 4622-4626 ◽

Cited By ~ 122

Author(s):

Guiyin Fang ◽

Hui Li ◽

Zhi Chen ◽

Xu Liu

Keyword(s):

Energy Storage ◽

Stearic Acid ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Expanded Graphite ◽

Energy Storage Materials ◽

Storage Materials ◽

Graphite Composites

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Preparation and characterization of expanded graphite/metal oxides for antimicrobial application

Materials Science and Engineering C ◽

10.1016/j.msec.2017.03.043 ◽

2017 ◽

Vol 75 ◽

pp. 1019-1025 ◽

Cited By ~ 21

Author(s):

Wei-Che Hung ◽

Kuo-Hui Wu ◽

Dong-Yi Lyu ◽

Ken-Fa Cheng ◽

Wen-Chien Huang

Keyword(s):

Metal Oxides ◽

Expanded Graphite

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Preparation and Characterization of Expanded Graphite with ZnO Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.770 ◽

2011 ◽

Vol 197-198 ◽

pp. 770-773 ◽

Cited By ~ 1

Author(s):

Li Qin Wang ◽

Xiang Ni Yang ◽

Xiu Li Zhao ◽

Rui Jun Zhang ◽

Yu Lin Yang

Keyword(s):

Crude Oil ◽

Degradation Products ◽

Adsorption Property ◽

Expanded Graphite ◽

Blue Shift ◽

Strong Adsorption ◽

Ft Ir ◽

Degradation Reaction ◽

Ultraviolet Ray

The composites of expanded ghaphite with ZnO (EG/ZnO) have been prepared in the method of impregnation, and their degradation performance for crude oil have been investigated by the means of UV-Vis and FT-IR. The morphology and crystal structure of the EG/ZnO composites have been characterized by the means of SEM and XRD. The results are shown as follows: the EG/ZnO composites keep the laminated and microporous network structure of EG. ZnO particles in the composites are hexagonal crystal system, and they widely distribute in the cavities and the network pores of EG. In the UV-Vis spectra, there is a blue shift about 13 nm, which is from 255 nm to 242 nm at the biggest absorption peak. That indicates the component of the crude oil has already changed. Meanwhile, the results of FT-IR spectra show that a degradation reaction occurs obviously in the crude oil after irradiated by ultraviolet ray, and the degradation products possibly include alkone, aldehyde, alcohol, and so on. Thus, it can be inferred that the prepared EG/ZnO composites would be a new kind of functional material integrated strong adsorption property and degradation property into itself.

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