Z-type Sr2MgSi2O7: Eu < 2 + >, Dy3+/Ag3PO4 photocatalyst and preparation method thereof
A photocatalyst, na2hpo4·12h2o technology, applied in the field of photocatalysis, can solve the problems of limiting the use of photocatalysts, achieve the effect of broadening the photoresponse range, broad prospects, and improving separation efficiency
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Embodiment 1
[0041] Example 1 A new type of Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 catalyst of light
[0042] (1) Preparation method
[0043] (1) Ag 3 PO 4 preparation
[0044] First, measure 150 mL of deionized water into 250 mL of beaker A and beaker B, respectively. According to the stoichiometry, weigh 2.541g AgNO 3 The solid was added to beaker A and stirred for 1.0 h to completely dissolve to obtain A solution. Weigh 1.7907gNa 2 HPO 4 ·12H 2 O solid was added to beaker B, stirred for 1.0h to make it completely dissolved to obtain B solution. The B solution was added dropwise to the A solution, and stirred for 3.0 h to fully react. After standing, the transparent supernatant was removed, and the reaction yielded a yellow precipitate, which was collected by centrifugation, and washed several times with deionized water. Then, the obtained samples were placed in a vacuum drying oven and dried at 60 °C for 12.0 h.
[0045] (2) Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ ...
Embodiment 2
[0064] Example 2 Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 Application of photocatalysts in photocatalytic degradation of levofloxacin and simultaneous hydrogen production
[0065] (1) Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 Effects of Photocatalysts on Photocatalytic Degradation of Levofloxacin
[0066] Experimental method: 0.1g Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4The photocatalyst was placed in 100 mL of 30 mg / L levofloxacin solution. Under the condition of 25-28℃, irradiate with sunlight for 1.0h, and take samples every 30min. And after the end of the light, it was kept for 3.0h in the dark, and the samples were taken every 30min. The result is as Figure 8 .
[0067] Each suspension was placed in the dark for 30 min before sunlight exposure to achieve adsorption / desorption equilibrium. It can be seen from the dark experiment that in the presence of the photocatalyst, the concentration of levofloxacin decreases slightly with...
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