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Formation mechanism of porous rose-like WO3 and its photoresponse and stability study
摘要： WO3 materials are widely used in photocatalysis and electrocatalysis. In this work, sodium dodecyl benzene sulfonate (SDBS) was used to control the growth of H2WO4 during chemical bath deposition fabrication process. The as-prepared H2WO4 material showed a rose-like morphology and after annealing the obtained WO3 sample was porous with oxygen defects. XRD, SEM, TEM, XPS and some other method were used to characterize the samples. A possible growth mechanism was given depending on the characterization results. The addition of SDBS resulted in a simultaneous growth of plenty H2WO4 nucleus, which caused a uniform distribution. Compared with normal WO3, the as-fabricated porous rose-like WO3 showed a higher stability to photocorrosion and a narrower band gap.
关键词： porous,photocatalysis,electrocatalysis,oxygen defects,WO3,SDBS
更新于2025-09-23 15:19:57
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3D water-stable europium metal organic frameworks as a multi-responsive luminescent sensor for high-efficiency detection of Cr <sub/>2</sub> O <sub/>7</sub><sup>2?</sup> , MnO <sub/>4</sub><sup>?</sup> , Cr <sup>3+</sup> ions and SDBS in aqueous solution
摘要： A microporous europium metal–organic framework (Eu-MOF), namely, {[Eu3(bpydb)3(HCOO)(OH)2(DMF)]·3DMF·2H2O}n (1) with asymmetric trinuclear metal clusters extended by 4,40-(4,40-bipyridine-2,6-diyl) dibenzoic acid has been synthesized via the solvothermal method. PXRD of 1 confirms that it possesses excellent water stability and pH stability. The photo-luminescence properties of 1 exhibit effective recognition of Cr2O72?, MnO4?, and Cr3+ ions and SDBS. Furthermore, a wide linear range, high quenching constant and a low detection limit reveal that 1 can potentially act as a luminescence-based sensor for quantitative and highly sensitive detection of Cr2O72?, MnO4?, and Cr3+ ions as well as SDBS in aqueous solutions. To the best of our knowledge, the detection limit of 1 is the lowest value reported for Ln-MOF-based luminescent sensors to detect Cr2O72? ions (0.5 mM) in aqueous solutions. The use of a rare earth fluorescent probe for detecting MnO4? ions is not common. It is the first time that Ln-MOF as a fluorescence probe is used for detecting SDBS. Moreover, fluorescent-based test papers of 1 have also been prepared, which can be helpful to develop visual detection for Cr2O72?, MnO4?, and Cr3+ ions as well as SDBS in daily applications.
关键词： aqueous solution,SDBS,MnO4?,luminescent sensor,Cr2O72?,europium metal–organic framework,Cr3+ ions
更新于2025-09-10 09:29:36