首页|In situ meso-tetra(4-carboxyphenyl)porphyrin ligand substitution in Hf-MOF for enhanced catalytic activity and stability in photoredox reactions

In situ meso-tetra(4-carboxyphenyl)porphyrin ligand substitution in Hf-MOF for enhanced catalytic activity and stability in photoredox reactions

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Though there are numerous intrinsic merits of metal-organic frameworks(MOFs),low charge separation efficiency has imposed heavy restrictions on their photo-catalytic application.Herein,in situ porphyrin ligand sub-stitution,as a strategy for improving the charge separation efficiency and increasing the amounts of active sites,has been designed and realized in a Hf-biphenyl dicarboxylic acid(BPDC)MOF.Specifically,a size and geometry matched meso-tetra(4-carboxyphenyl)porphyrin(TCPP)ligand was selected and doped into Hf-BPDC MOF by forming coordinating bonds with Hf centers,forming dual-ligand Hf-BPDC-TCPP MOF.The resultant Hf-BPDC-TCPP MOF showed significantly improved activity and chemical stability in the photocatalytic H2 generation(261 μmol·g-1·h-1)and tetracycline(TC)degradation reactions(95.8％),which was 48 and 1.47 folds higher than that of the Hf-BPDC MOF.Photophysical and electro-chemical studies revealed that the introduction of por-phyrin ligand could generate a stronger internal electric field for boosting the charge separation and transfer,increase the specific surface area for providing more active sites,and narrow the band gap to enhance the visible light absorption.This in situ ligand substitution method provides a promising approach to build a tunable platform for con-structing high-performance MOF photocatalysts.

Ligand substitutionMetal organic frameworksMeso-tetra(4-carboxyphenyl)porphyrinHydrogen evolution reactionTetracycline degradation

Jie Hu、Hong-Xin Lao、Xiu-Wu Xu、Wei-Kang Wang、Le-Le Wang、Qin-Qin Liu

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School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China

College of Chemistry and Materials,Engineering Research Center of Carbon Neutrality,Anhui Normal University,Wuhu 241002,China

Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants,Putian University,Putian 351100,China

国家自然科学基金国家自然科学基金Open Project Program of Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contamina

2210206421972058

2024

10.1007/s12598-023-02595-4

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(6)
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