A kind of spiral type titanyl oxalate photocatalyst and preparation method thereof
A technology of titanyl oxalate and photocatalyst, applied in the field of photocatalysis, can solve the problems of low quantum efficiency and surface reaction efficiency, limited development of photocatalyst materials, toxicity of CdS, etc., and achieves excellent photocatalytic activity and stable helical morphology. , the effect of low production cost
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[0042] A preparation method of a helical titanyl oxalate photocatalyst, comprising the following steps:
[0043] Step 1: 4.90-9.80g titanyl sulfate [TiOSO 4 ] into deionized water and stirred until completely dissolved to obtain a solution with a concentration of 0.5-1mol / L.
[0044] Step 2: After standing the solution obtained in Step 1 for 6-12 hours, filter the solution with qualitative filter paper to remove impurities to obtain a transparent titanyl sulfate solution.
[0045] Step three: add 1.79-3.57g ammonium oxalate [(NH 4 ) 2 C 2 o 4 ·H 2O], stirred for 15-45min until completely dissolved, as a precursor solution. Titanium oxysulfate [TiOSO 4 ] as a titanium source, ammonium oxalate as a complexing agent to provide C 2 o 4 2- In order to form titanyl oxalate [Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 O] crystal nuclei.
[0046] Step 4: Transfer the precursor solution obtained in Step 3 to a 100mL polytetrafluoroethylene reactor, seal it, put it in an oven, a...
Embodiment 1
[0050] 9.80g TiOSO 4 Add it into 50mL deionized water, stir until completely dissolved, and obtain a solution with a concentration of 1mol / L; after standing it for 12 hours, use qualitative filter paper to filter the solution to remove impurities to obtain a transparent titanyl sulfate solution; Add 3.57g ammonium oxalate [(NH 4 ) 2 C 2 o 4 ·H 2 O], stirred for 20 minutes until completely dissolved, and used as a precursor solution; transferred the obtained precursor solution to a 100mL polytetrafluoroethylene reactor, sealed it, put it in an oven, and performed a hydrothermal reaction at 100°C for 5 hours to obtain a reaction product A; After the reaction, the reaction kettle was naturally cooled to room temperature, and the obtained reaction product A was centrifuged, washed with deionized water to pH=7, and then washed 3 times with absolute ethanol to obtain the reaction product B; Dry at 60° C. for 3 hours to obtain a helical titanyl oxalate photocatalyst.
[0051] r...
Embodiment 2
[0053] 9.80g TiOSO 4 Add it into 50mL deionized water, stir until completely dissolved, and obtain a solution with a concentration of 1mol / L; after standing it for 6 hours, filter the solution with qualitative filter paper to remove impurities to obtain a transparent titanyl sulfate solution; Add 3.57g ammonium oxalate [(NH 4 ) 2 C 2 o 4 ·H 2 O], stirred for 40 minutes until completely dissolved, and used as a precursor solution; transferred the obtained precursor solution to a 100mL polytetrafluoroethylene reactor, sealed it and put it in an oven, and reacted hydrothermally at 100°C for 5 hours to obtain a reaction product A; After the reaction was finished, the reaction kettle was naturally cooled to room temperature, and the obtained reaction product A was centrifuged, washed with deionized water to pH=7, and then washed 4 times with absolute ethanol to obtain the reaction product B; Dry at 65° C. for 5 hours to obtain a helical titanyl oxalate photocatalyst.
[0054]...
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