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Synthesis and characterization of thermally stable zirconia based mesoporous nanosilica with metalloporphyrin encapsulation

机译:含金属卟啉包封的热稳定氧化锆型介孔纳米磷酸盐的合成与表征

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Metal composite materials-48 (MCM-48) with silica zirconia mesoporous matrix (having a Zr/Si ratio of 0.02) has been developed successfully using autogenous conditions and Copper tetra phenyl porphyrin (CuTPP) inclusion via flexible ligand approach. Thermo gravimetric analysis (TGA) was used to study the thermal stability which gives the stability up to 700°C, Fourier transform infrared spectroscopy (FTIR) for the functional group attachment also confirmed the MCM-48 structure and the Zirconia addition and X-Ray photon spectroscopy (XPS) for the binding energies and bonding also revealed the surface Zr4+ states. DRS-UV-Vis study for the photophysical behaviour, visible light activation and band gap reduction which reduced from 5.6 to 2.8 eV. All the characterizations have confirmed that nanoscale mesoporous silica with successful inclusion of zirconia in the matrix and the encapsulation of CuTPP was confirmed via diffuse reflectance (DR Uv-Vis) spectroscopy.
机译:使用自体条件和铜四苯基卟啉(CUTPP)包括通过柔性配体方法,已经开发了金属复合材料-48(MCM-48)与二氧化硅氧化锆介孔基质(具有0.02的Zr / Si比为0.02)。使用热重量分析(TGA)研究热稳定性,使稳定性高达700°C,功能群附件的傅里叶变换红外光谱(FTIR)也证实了MCM-48结构和氧化锆添加和X射线用于结合能和粘合的光子谱(XPS)也揭示了表面Zr4 +状态。 DRS-UV-VIS用于学习的光物理行为,可见光激活和带隙减少,减少5.6至2.8eV。所有表征已经证实,通过扩散反射率(DR UV-VIS)光谱证实了具有成功包含氧化锆的纳米级介孔二氧化硅和CUTPP的包封。

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