Application of cationic iron arene complex serving as catalyst for photo-degradation of organic dye
A technology of organic dyes and complexes, which is applied in the application field of organic dye photodegradation catalysts, can solve problems such as the lack of organic iron salt complexes, and achieves the effects of being conducive to separation and recycling, simple preparation and improved reaction activity.
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Embodiment 1
[0079] The preparation of embodiment 1 heterogeneous organic iron complex catalyst
[0080] (1) Put 10g of silica gel (60-100 mesh) dried in vacuum into a three-necked flask wrapped with black cloth, add 20mL of solvent (acetone), and stir; in a small beaker wrapped with black paper, put 2g [Cyclopentadiene-iron-(N-ethyl)carbazole]hexafluorophosphate was dissolved in 30mL of solvent (acetone), drained into the dropping funnel with a glass rod, and the dissolved [cyclopentadiene The solution of ene-iron-(N-ethyl)carbazole]hexafluorophosphate was added dropwise into the three-neck flask, and stirred vigorously for 5 hours. The reaction was monitored by thin-layer chromatography every half hour, and it was found that the organic cationic ferrocene complex ([cyclopentadiene-iron-(N-ethyl) carbazole] hexafluorophosphate) did not change.
[0081] (2) Suction filtration under reduced pressure in the dark, the residual product in the reaction vessel was washed repeatedly with mother ...
Embodiment 2
[0084] According to the method of Example 1, by replacing [cyclopentadiene-iron-(N-ethyl) carbazole] hexafluorophosphate with [cyclopentadiene-iron-chlorobenzene] hexafluorophosphate, other operations Similarly, silica-supported [cyclopentadiene-iron-chlorobenzene]hexafluorophosphate was prepared.
[0085] Table 1 below shows the mass percentages of the two iron complexes in Example 1 and Example 2 in the corresponding loaded silica gel.
[0086] Table 1
[0087] serial number
[0088] The UV-Vis absorption spectrum of [cyclopentadiene-iron-chlorobenzene] hexafluorophosphate supported on silica gel as figure 1 Curve '2' is shown.
Embodiment 3
[0090] In a 100ml small beaker, add 1.2mg rhodamine (5×10 -5 mol / L), the catalyst obtained in 0.25g embodiment 1 and the dilute hydrochloric acid that 50ml pH value is 2.0. Electromagnetic stirring was performed for 1 hour to ensure that the adsorption of rhodamine was saturated. The initial concentration of rhodamine at the characteristic absorption peak at 555.0 nm was monitored according to the ultraviolet-visible absorption spectrometry. Then, add 1.545mL of 30% hydrogen peroxide, and irradiate the sample solution with visible light. The irradiation method is to stop the light after 3 minutes of light, and measure the concentration of the dye in the system. After the measurement, continue to light for 3 minutes. , and so on (halogen lamp: 12V, 75W; 370-520nm,), sequentially measure the change of the dye absorbance value corresponding to the light time during the degradation process and record the data.
[0091] figure 2 Shows the variation of the characteristic absorpt...
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