Citation: FENG Ming-Zhu, PENG Tong-Jiang, SUN Hong-Juan, WANG Pei-Cao. Effect of Oxidation Degree on Structure and Cation Exchange Capacity of Graphite Oxide[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(3): 427-433. doi: 10.11862/CJIC.2016.047 shu

Effect of Oxidation Degree on Structure and Cation Exchange Capacity of Graphite Oxide

1.
School of Science, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
2.
Analytical and Testing Center, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
3.
Institute of Mineral Materials & Application, Southwest University of Science and Technology, Mianyan, Sichuan 621010, China

Corresponding author: PENG Tong-Jiang, tjpeng@swust.edu.cn
Received Date: 15 September 2015
Revised Date: 19 November 2015

Figures(6)

The graphite oxide samples with different oxidation degree were prepared by modified Hummuers method. The kinds and content of oxygen containing functional groups, structure and cation exchange capacity for the experiment process samples were characterized by XRD, FTIR and XPS. The results show: graphite structure layer oxidized have various oxygen-bearing functional groups such as hydroxyl group (C-OH), carboxy group (-COOH) and epoxy group (C-O-C); with the increase of the degree of oxidation, graphite structures gradually and completely converted to the structure of graphite oxide. The content of C-O-C and-COOH increases gradually, and the content of C-OH first increases then decreases. With the increase of the oxidation degree, the cation exchange capacity of graphite oxide samples also increase firstly and then decrease, corresponding to the maximum value of 1.70, 4.50 and 3.80 mmol·g^-1. The C-OH in the carbon basal plane is protonated and H⁺ is generated at the same time. The H⁺ can exchange with other cations in the interlayer of graphite oxide. The content of C-OH is the main factor affecting the cation exchange capacity of graphite oxide, and the cation exchange capacity of graphite oxide samples increase with the increase of the content of C-OH.
- graphite oxide,
- oxidation degree,
- cation exchange capacity
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沈阳化工大学材料科学与工程学院沈阳 110142