Preparation method and application of UiO-66-NH2/BiVO4/BiOBr ternary visible-light-driven photocatalyst
A uio-66-nh2, catalyst technology, applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low pollutant adsorption and degradation efficiency, inability to Reach the level of practical application, the quantum efficiency of the catalyst is not high, and achieve the effects of easy implementation, enhanced degradation, and reduced recombination
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[0039] In the prior art, there is a problem that the heterojunction structure and the Bi-system catalyst on the adsorption and degradation efficiency of contaminants are low, and the present invention provides a UIO-66-NH. 2 / BIVO 4 / BiOBR three-dollar visible photocatalyst method, including the following steps:
[0040] Preparation of BIVO in turn 4 / BiOBR binary catalyst and UIO-66-NH 2 Bivo 4 / BiOBR composite binary catalyst is a composite two-dimensional piece structure, UIO-66-NH 2 For a hemisphere cluster, will then get the BIVO 4 / BiOBR composite two-dimensional film transfer and anchored in UIO-66-NH 2 On the substrate, the ultimately combined heterogeneous structure UIO-66-NH 2 / BIVO 4 / BiOBR ternary visible photocatalyst.
[0041] UIO-66-NH 2 The band gap width is about 2.5 eV, which can degrade the pollutants in a visible light, and has a large specific surface area. BiVo 4 Biobr and UIO-66-NH 2 The three-membered NPN heterojunction is built by the reverse anchor...
Embodiment 1
[0060] Prepare UIO-66-NH 2
[0061] Accurate 5 mmol zirconium chloride ZrCl 4 Ultrasound is completely dissolved in 40 ml of dimethylformamide DMF, resulting in a solution ZrCl 4 -DMF. Subsequent 5 mmol diaphraginoid terephthalic acid BDC-NH 2 Add to ZrCl 4 The -DMF solution is ultrasound to completely dissolve, and it is recorded as solution B. After the Solution B magnetic force was stirred for 60 min, transferred to a hydrothermal reaction kettle of 100 ml of substrate for polytetrafluoroethylene, and the temperature was 48 h at 120 ° C. After the reaction solution was cooled, the centrifugation was separated and washed with DMF and anhydrous methanol to remove impurities, then the solid was soaked for 12h with anhydrous methanol, and the last 80 ° C was dried 12h, and the 200 mesh screen was grounded. Yellow solid powder spare , Record the number U.
[0062] Preparation BIVO 4 / BIOBR binary catalyst
[0063] Accurately weigh 4 mmol of metavanadate NH 4 VO 3In 35 ml of pure w...
Embodiment 2
[0068] Prepare UIO-66-NH 2
[0069] Accurate 5 mmol zirconium chloride ZrCl 4 Ultrasound is completely dissolved in 40 ml of dimethylformamide DMF to give ZrCl 4 -DMF solution. Subsequent 5 mmol diaphraginoid terephthalic acid BDC-NH 2 Add to ZrCl 4 The -DMF solution is ultrasound to completely dissolve, and it is recorded as solution B. After the Solution B magnetic force was stirred for 60 min, transferred to a hydrothermal reaction kettle of 100 ml of substrate for polytetrafluoroethylene, and the temperature was 48 h at 120 ° C. After the reaction solution was cooled, the centrifugation was separated and washed with DMF and anhydrous methanol to remove impurities, then the solid was soaked for 12h with anhydrous methanol, and the last 80 ° C was dried 12h, and the 200 mesh screen was grounded. Yellow solid powder spare , Record the number U.
[0070] Preparation BIVO 4 / BIOBR binary catalyst
[0071] Accurately weigh 4 mmol of metavanadate NH 4 VO 3 In 35ml pure water, oscil...
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