高热稳定性α-氧化铁的宏量制备及其电化学性能研究

doi:10.19964/j.issn.1006-4990.2021-0564

Abstract

Abstract:

Ferric oxide（Fe₂O₃） is an important n-type semiconductor material,which has been widely used in the fields of dyes,sensors,wastewater treatment,photocatalysis and lithium ion batteries.α-Fe₂O₃ with different sizes of flake structures was synthesized by hydrothermal method.The large size of flake α-Fe₂O₃ could still retain its original color and shape at 1 000 ℃,which proved that it had high thermal stability and had great application potential in paint,dye and other fields.The effect of NaOH and FeCl₃ solution concentration and mixing order on α-Fe₂O₃ materials was studied.Moreover,the band gap,lithium storage performance and the dependence of powder color and size were analyzed.The results showed that flake α-Fe₂O₃ with different sizes could be obtained by adjusting the NaOH concentration and NaOH/FeCl₃ adding sequence.The color of α-Fe₂O₃ deepened with the increase of particle size,and the band gap increased with the decrease of the particle size.Moreover,the actual capacity of the battery could be improved by dozens of nano-sized particles compared with micron size particles.It would provide the benefit to the research and development of the macro-preparation process of α-Fe₂O₃ and the application of electrochemistry,ceramic glazes,pigments.More importantly,the development of α-Fe₂O₃ was of great significance for reducing carbon emissions from traditional energy activities and promoting China′s early realization of the“dual carbon” national goal.

Key words: α-Fe₂O₃, lamellar structure, hydrothermal method, electrochemical performance, particle size

CLC Number:

TQ138.11

LU Zheng,CHEN Kunfeng,XUE Dongfeng. Study on large-scale preparation and electrochemical properties of high thermal stabilized α-Fe₂O₃[J]. Inorganic Chemicals Industry, 2022, 54(3): 45-50.

Figures/Tables 11

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References 30

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样品	c（FeCl₃）/ （mol·L^-1）	c（NaOH）/ （mol·L^-1）	D_c/nm	片状颗粒平均直径/μm	表观颜色
K1	2	6	21.75	0.074	红色
K2	2	6	42.69	0.071	红色
K3	2	8	53.14	3.50	紫红色
K4	2	8	58.55	1.28	紫红色
K5	2	12	55.10	8.45	紫红色
K6	2	12	59.90	1.43	紫红色

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Inorganic Acid-Base-Salt Committee of CIESC

Study on large-scale preparation and electrochemical properties of high thermal stabilized α-Fe₂O₃

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