标题: Molten salt synthesis of porous chromium carbide/carbon biomorphic ceramics for Pb2+ removal from water

作者: Kan, XQ (Kan, Xiaoqing); Ding, J (Ding, Jun); Yu, C (Yu, Chao); Deng, CJ (Deng, Chengji); Zhu, HX (Zhu, Hongxi); Hou, HB (Hou, Haobo)

来源出版物: MICROPOROUS AND MESOPOROUS MATERIALS 卷: 318 文献号: 111030 DOI: 10.1016/j.micromeso.2021.111030 出版年: APR 2021

摘要: Chromium carbides have lately attracted extensive interest for the modification of biomorphic ceramics due to their high hardness, high melting point, and excellent chemical stability. However, an efficient fabrication method for the controlled preparation of chromium carbides is defective and still requires further research. In an effort to overcome this challenge, porous chromium carbide/carbon biomorphic ceramics were prepared via molten salt synthesis at as low as 700 degrees C by using Cr as metal source and pinewood derived porous carbon material as template. Chromium carbides grew in situ on the outer surfaces and inner walls of the carbon template with gully and columnar shapes, wherein the bottom of the columnar chromium carbide is Cr7C3 and the top is Cr3C2. The chromium carbide grown in situ on the carbon template substantially improved the oxidation resistance of the material. The pseudo-second-order model was used to describe the dynamic process. The adsorption isotherm data were well described by Langmuir isotherm model, and the maximum adsorption capacity of the porous chromium carbide/carbon biomorphic ceramics for Pb2+ was calculated to be 8.97 mg g(-1), unveiling the considerable application prospect of the adsorption of heavy metal ions.

入藏号: WOS:000638254600004

语言: English

文献类型: Article

作者关键词: Biomorphic ceramics; Chromium carbide/carbon; Molten salt; Reaction mechanism; Adsorption

地址: [Kan, Xiaoqing; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

[Kan, Xiaoqing; Ding, Jun; Yu, Chao; Deng, Chengji; Zhu, Hongxi] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China.

[Hou, Haobo] Zhaoqing Wuhan Univ, Environm Technol Res Inst, Zhaoqing 526200, Guangdong, Peoples R China.

通讯作者地址: Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

Ding, J (通讯作者)，Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China.

电子邮件地址: dingjun@wust.edu.cn; houhb@whu.edu.cn

影响因子：4.551