文献类型：期刊文献

英文题名：Delocalized π-electron polymeric nanoflowers with dual redox functionalities for high-capacity and ultrafast capacitive removal of Sr(II)

作者：Wu, Jiawei[1];Hu, Lintong[1];Peng, Yuting[1];Li, Yize[1];Hong, Ying[2];Yang, Jun[1];Shi, Minjie[1];Lin, Yuqing[3,4]

机构：[1]Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China;[2]Nanjing Customs Ind Prod Inspection Ctr, Nanjing 210019, Jiangsu, Peoples R China;[3]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[4]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe 6578501, Japan

年份：2026

卷号：307

外文期刊名：ENVIRONMENTAL RESEARCH

收录：;EI(收录号：20263421346827);Scopus(收录号：2-s2.0-105048018098);WOS:【SCI-EXPANDED(收录号:WOS:001855933600001)】；

基金：We acknowledge funding support from the Natural Science Foundation of Jiangsu Province (No. SBK20250202091) and the State Key Laboratory of Water Pollution Control and Green Resource Recycling Foundation (NO. PCRRF25028) .

语种：英文

外文关键词：Radionuclide treatment; Wastewater purification; Capacitive deionization; Electrode material

摘要：The remediation of radioactive wastewater containing hazardous Sr(II) is critical for environmental safety and public health, driving demand for efficient water purification technologies. Capacitive deionization (CDI) has emerged as a promising electrochemical strategy for ion removal; however, its efficiency in capturing Sr(2+)remains limited by the scarcity of suitable high-performance electrode materials. Herein, we develop a polymeric nanoflower material, Poly-Triphenylene-Tetracarboxyl-Perylene (PTTP), with an intrinsically delocalized electronic structure for use as an advanced CDI electrode to electrochemically capture Sr2+. The unique nanoflower architecture not only enhances Sr(2+)permeability and diffusion but also, in synergy with its pi-electron-rich stabilized backbone, facilitates extended electron delocalization across the polymer framework. Besides, the deliberate introduction of carbonyl and imine functionalities provides electronically optimized binding sites for Sr(2+)uptake, as verified by in-situ characterizations, theoretical calculations, and molecular dynamics simulations. When implemented in a CDI cell, the PTTP electrode delivers an outstanding Sr(2+)removal capacity of 48.2 mg g(-1), a rapid rate of 3.1 mg g(-1)min(-1), and long-term stability with similar to 98.9% retention at 1.2 V. This exceptional CDI performance highlights the promise of PTTP for treating radioactive effluents.