Preparation Of Mesoporous Alkyl Organic-titanium Hybrid Materials And Photocatalytic Properties Study

In recent years,the problems of large-scale haze and other environmental pollution broke out from time to time,the protection of the environment becoming more and more urgent,governance of environmental pollution without delay.The production of printing and dyeing industry process bring in dye pollution,which is one of the important reasons of water pollution.Contaminants in the water can absorb light,reduce water visibility,and consume oxygen in the water,resulting in the lack of oxygen in water.In this paper,Rhodamine B?RhB?was selected as the representative dye compound,for the following photocatalytic degradation test.?1?The reagent CH₃ MgI was prepared by reacting the halogenated hydrocarbon CH3 I with magnesium filar?Mg?with ether as a solvent.In the low temperature conditions,controling Grignard reagent CH3 MgI reacting with inorganic titanium reagent?TiCl4?,and the organictitanium precursor?CH3TiCl3?solution was obtained;Using the hydrolysis co-condensation technique,methyl-based mesoporous organictitanium CH3-TiO2 hybrid material was obtained.The presence of methyl functional groups in mesoporous organictitanium CH3-TiO2 hybrid materials was characterized by Fourier transform infrared spectroscopy?FT-IR?;by the technology of nitrogen adsorption-desorption,X-ray powder diffraction?XRD?,transmission electron microscopy?TEM?,scanning electron microscopy?SEM?,UV-visible diffuse reflectance spectroscopy?UV/Vis-NIR?,the surface physical and chemical properties,morphology and light absorption properties of mesoporous methyl organictitanium CH3-TiO2 hybrid materials were investigated.The results show that CH3-TiO2 obtained by hydrolysis condensation is a mesoporous material.The rhodamine B?RhB?was used as the substrate of the target to degrade,and the mesoporous methyl organictitanium CH3-TiO2 hybrid material was used as the degradation catalyst.The photocatalytic activity of the mesoporous methyl organictitanium CH3-TiO2 hybrid material was investigated under the condition of simulated sunlight.Compared with inorganic TiO2,the photocatalytic activity of mesoporous organictitanium CH3-TiO2 hybrid material is better.?2?Using tetrahydrofuran?THF?as solvent,the Grignard reagent C6H5CH2 MgCl was prepared by reacting halogenated hydrocarbon C6H5CH2 Cl with magnesium chip?Mg?.At low temperature conditions,the reaction process was controlled according to the molar ratio of Grignard reagent C6H5CH2 MgCl and inorganic titanium reagent TiCl4 and Ti?iO-Pr?4 of 4: 1: 3,the organictitanium precursor?C6H5CH2Ti?iO-Pr?3?was obtained;the mesoporous organictitanium BnTiO hybrid material based on benzyl group was preparedby hydrolysis co-condensation combined with solvent evaporation-induced self-assembly technique?EISA?,a mesoporous organictitanium BnTiO hybrid material based on benzyl group was prepared.Through a variety of characterization methods such as,nuclear magnetic resonance technology?NMR?to determine the benzyl organic titanium precursor?C6H5CH2Ti?iO-Pr?3?,fourier transform infrared spectroscopy?FT-IR?characterizes benzyl groups of organic groups in mesoporous organic titanium BnTiO hybrid materials.By means of nitrogen adsorption-desorption technology,X-ray powder diffraction?XRD?,transmission electron microscopy?TEM?,scanning electron microscopy?SEM?,UV-visible diffuse reflectance spectroscopy?UV/Vis-NIR?,the physical and chemical properties,morphology and light absorption properties of organictitanium BnTiO hybrid materials were investigated.The results show that BnTiO?C6H5CH2-TiO2?obtained by hydrolysis condensation is a mesoporous material.And with the introduction of benzyl group,UV visible diffuse reflectance spectral absorption range extends to the visible region.The rhodamine B?RhB?was used as the substrate of the target to degrade,the mesoporous benzyl titanium BnTiO hybrid material was used as the degradation catalyst,the photocatalytic activity of mesoporous benzyl organictitanium BnTiO hybrid materials was investigated under simulated sunlight conditions.Compared with inorganic TiO2,the photocatalytic activity of mesoporous benzyl titanium BnTiO hybrid material is better.