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Updated: Jan 7, 2026
Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Synergistic polarization-crystallinity modulation and interlayer bridging in poly heptazine imide for enhanced
Chongkun Zhao1, Feng He1, Jingjuan Yi1
1Hunan Key Laboratory for the Design and Application of Actinide Complexes, School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, PR China.
Abstract:
Photocatalytic immobilization of U(VI) is an effective means of separating and removing uranium from water bodies. Improving photocatalytic performance is currently a hot topic in photocatalytic research. In light of this, this study proposes a novel strategy based on synergistic polarization-crystallinity modulation and interlayer bridging in poly heptazine imide (PHI) to achieve efficient U(VI) removal. The obtained potassium poly heptazine imide (PHI-K) exhibits rewarding piezo-photocatalytic performance, removing 98.4 % of U(VI) within 30 min. Experimental results demonstrate that high crystallinity, piezoelectric electric fields, and K+ ion intercalation effectively facilitate carrier separation, thereby enhancing photocatalytic activity. Characterization and density functional theory calculation further reveal enhanced piezoelectric properties induced by K+ ion polarization. In addition, the material exhibits excellent stability and resistance to ionic interference. Finally, a potential U(VI) removal technique is proposed. This work is anticipated to present a promising alternative for piezo-photocatalytic U(VI) removal.
