Citation: Pengfei WANG, Qiuyan WU. Nano-sized 1D copper coordination polymer: Room-temperature solid-state synthesis and efficient adsorption performance toward Congo red dye[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(10): 2099-2108. doi: 10.11862/CJIC.20260150 shu

Nano-sized 1D copper coordination polymer: Room-temperature solid-state synthesis and efficient adsorption performance toward Congo red dye

Pengfei WANG ^{1, 2,,} ,
Qiuyan WU ^1,,

1.
School of Materials and Environmental Engineering, Chizhou University, Chizhou, Anhui 247000, China
2.
State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China

Corresponding author: Pengfei WANG, pfwang@czu.edu.cn; njuwangpf@163.com Qiuyan WU, 93708282@qq.com
Received Date: 1 May 2026
Revised Date: 23 July 2026

Figures(7)

A nano-sized copper coordination polymer, {[Cu(4, 4′-bipy)(H₂O)₃(SO₄)]·2H₂O}_n (Cu-CP), was successfully synthesized via a room-temperature solid-state reaction method using CuSO₄·5H₂O and 4, 4′-bipyridine (4, 4′-bipy) as the starting materials. Scanning electron microscopy (SEM) characterization revealed that the as-prepared Cu-CP exhibited a uniform particle morphology, with particle sizes predominantly distributed in the range of 100-300 nm. The adsorption performance of Cu-CP toward various organic dyes in aqueous solutions was systematically investigated. Impressively, Cu-CP demonstrated excellent removal efficiency toward Congo red (CR) dye, achieving an adsorption capacity as high as 5 486 mg·g^-1 and a removal rate of 99.50% in 30 min. Kinetic studies demonstrated that the adsorption process follows the pseudo-second-order kinetic model, while thermodynamic analysis further confirmed that the adsorption is spontaneous, exothermic, and proceeds predominantly via monolayer chemisorption. More importantly, the ball-milling-assisted room-temperature solid-state synthetic route adopted offers multiple advantages, including straightforward operation, solvent-free conditions, facile scalability, and high product yield.
- room-temperature solid-state synthesis,
- adsorbent,
- organic dye
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