Facile synthesis of MOFs derived TiO2/ZnO porous composite materials for enhanced ammonia sensing properties at room temperature

IF 2.8 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2025-03-24 DOI:10.1016/j.cplett.2025.142059

E. Namratha , M.S. Surendra Babu , A. Jagan Mohan Reddy

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Abstract

This paper discusses the facile synthesis of TiO₂/ZnO composite materials derived from the corresponding metal-organic frameworks (MOFs) and chemiresistive ammonia gas sensing at room temperature. All MOF composites were characterized by Fourier transform Infrared (FT-IR) spectroscopy, X-ray diffraction and scanning electron microscope, XPS analysis and BET analysis. The unique composition, homogeneous distribution and crystalline microstructure of TiO₂/ZnO composites exhibited enhanced surface reactivity and selectivity in ammonia gas sensing. c-MIL-125_50% Zn composite offered superior sensor performance and high selectivity towards ammonia gas with excellent stability, including high response value (268), quick response/recovery time (60/8 Sec) and outstanding stability. All sensing measurements were carried out at room temperature over NH₃ and various volatile organic compound (VOC) gases. The average particle size of all synthesized MOFs was around 30 nm.

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.