氯化钙熔盐中电解-刻蚀制备碳化钛衍生碳研究

doi:10.19964/j.issn.1006-4990.2022-0278

Abstract

Abstract:

Titanium carbide（TiC） was firstly prepared by electroreduction of high titanium slag/C in CaCl₂ molten salt，and the TiC was electrochemically etched to obtain titanium carbide-derived carbon（TiC-CDC）.The influence law of molten salt temperature on the composition and structure of TiC products was investigated to obtain the conditions for the preparation of TiC precursors with good morphology and structure for the next step of electrochemical etching.The research results showed that the molten salt temperature was an important influencing factor.The reaction rate was slow at lower temperature，while high temperature would cause product ablation and energy waste，and the products obtained at 950 ℃ had better morphological structure.The TiC prepared at 950 ℃ was electrochemically etched for 18 h，and the TiC-CDC with the coexistence of amorphous carbon and ordered graphite band structure was obtained.The pore structure of the product was mainly microporous with a specific surface area of 327.88 m²/g，which proved that the carbide-derived carbon with different structures could be prepared by molten salt electroreduction-etching.It was more environmentally friendly than the chlorination method，but the etching time was longer and the etching efficiency was needed to be improved.

Key words: titanium carbide, titanium carbide-derived carbon, high titanium slag, molten salt electroreduction, etching

CLC Number:

TF19

PENG Shuang, CHEN Chaoyi, WANG Shiyu, BAI Yang, LI Tianpei, GU Wei. Study on preparation of titanium carbide derived carbon by electrolysis-etching in CaCl₂ molten salt[J]. Inorganic Chemicals Industry, 2023, 55(3): 78-83.

Figures/Tables 12

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References 29

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编号	主要元素质量分数/%
编号	O	Mg	Al	Si	Ca	Ti	Mn	Fe
1	40.63	0.31	1.77	2.11	0.41	50.19	1.31	3.27
2	41.82	0.33	1.28	1.61	0.55	49.06	1.33	4.02
3	40.55	0.29	1.32	2.05	0.62	50.12	1.41	3.64
平均	41.00	0.31	1.46	1.92	0.53	49.79	1.35	3.64

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Study on preparation of titanium carbide derived carbon by electrolysis-etching in CaCl₂ molten salt

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