Inorganic–organic hybrids based on Keggin-type polyoxometalate@Cu/Ag for degradation/absorption of methylene blue and electrocatalytic property

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2024-11-23 DOI:10.1016/j.vacuum.2024.113875

Tai-Dan Chen , Jin-He Wang , Jiu-Yu Ji , Xun Zhou , Shaohui Zhang , Yue Tai , Kun Zhou

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Abstract

Inorganic–organic hybrid materials based on polyoxometalates (POMs) owing to their structural characteristics have potential applications in many fields including optics, electronics, and catalysis and so on. Two inorganic-organic hybrid compounds {[Cu(pyr)₂]₄(SiW₁₂O₄₀)}_n (1) and {[Ag(pyr)₂]₄(SiW₁₂O₄₀)}_n (2) (pyr = pyrazole) were synthesized by the assembly of [SiW₁₂O₄₀]^4- as the inorganic structural unit, the N-containing heterocyclic pyr as the organic ligand, and Cu⁺/Ag⁺ as the linkers under hydrothermal conditions. One dimensional (1D) chain 1 and two dimensional (2D) layer 2 were effectively confirmed through X-ray diffraction techniques and etc. Their photo-thermal equilibrium temperatures were 76.6 °C and 35.4 °C, and the superior photo-thermal performance of 1 to that of 2 may be attributed to their absorption intensities at 532 nm. Compound 1 photocatalyzed the degradation of MB, and compound 2 mainly adsorbed MB, well explaining their structure-activity relationship. In addition, both 1 and 2 have good electrocatalytic activity towards sodium nitrite.

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基于keggin型polyoxometalate@Cu/Ag的无机-有机杂化物对亚甲基蓝的降解/吸收及电催化性能研究

基于多金属氧酸盐（pom）的无机-有机杂化材料以其独特的结构特点在光学、电子、催化等领域具有潜在的应用前景。以[SiW12O40]4-为无机结构单元，含n杂环pyr为有机配体，Cu+/Ag+为连接体，在水热条件下组装合成了两种无机-有机杂化化合物{[Cu(pyr)2]4(SiW12O40)}n(1)和{[Ag(pyr)2]4(SiW12O40)}n (2) （pyr =吡唑）。通过x射线衍射等技术有效地确定了一维（1D）链1和二维（2D）层2。它们的光热平衡温度分别为76.6°C和35.4°C， 1优于2的光热性能可能与它们在532 nm处的吸收强度有关。化合物1光催化降解MB，化合物2主要吸附MB，很好地解释了它们的构效关系。此外，1和2对亚硝酸钠均具有良好的电催化活性。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.