Bi2O3/(BiO)2CO3 heterojunction catalyst with visible photocatalytic activity and preparation method for Bi2O3/(BiO)2CO3 heterojunction catalyst
A catalytic activity, visible light technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as catalytic activity limitation, achieve good photocatalytic performance, Simple operation and low equipment requirements
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[0028] Example 1
[0029] Step1: Mix 2.3mmol of bismuth nitrate pentahydrate and 3.0mmol of urea, dissolve in 30ml of deionized water, and stir for 30min at room temperature to form a precursor solution.
[0030] Step2: Transfer the precursor solution obtained in Step1 to an autoclave lined with polytetrafluoroethylene, keep it at 160°C for 12h, and cool to room temperature along with the furnace.
[0031] Step3: Wash the powder obtained in Step2 with deionized water and absolute ethanol in turn, and then vacuum dry at 80℃ to obtain (BiO) 2 CO 3 powder.
[0032] Step4: Get the (BiO) from Step3 2 CO 3 The powder is calcined at 400℃ for 60min, then Bi with visible light catalytic activity is obtained 2 O 3 / (BiO) 2 CO 3 Heterojunction catalyst.
[0033] Step5: For comparison and explanation, take the (BiO) obtained from Step3 2 CO 3 The powder is calcined at 500℃ for 4h, the obtained sample is pure phase Bi 2 O 3 Powder.
[0034] Yes (BiO) 2 CO 3 Powder, Bi 2 O 3 Powder and Bi 2 O 3 / (BiO)...
Example Embodiment
[0042] Example 2
[0043] Step1: Mix 2.5mmol of bismuth citrate and 3.1mmol of urea and dissolve in 30ml of deionized water, stir and drop 10ml of concentrated ammonia at room temperature, and then stir for 30min at room temperature to form a precursor solution.
[0044] Step2: Transfer the precursor solution obtained in Step1 to a high-pressure reactor lined with polytetrafluoroethylene, keep it at 180°C for 24h, and cool to room temperature along with the furnace.
[0045] Step3: Wash the powder obtained in Step2 with deionized water and absolute ethanol in turn, and then vacuum dry at 80℃ to obtain (BiO) 2 CO 3 powder.
[0046] Step4: Get the (BiO) from Step3 2 CO 3 The powder is calcined at 400℃ for 60min, then Bi with visible light catalytic activity is obtained 2 O 3 / (BiO) 2 CO 3 Heterojunction catalyst.
[0047] For the sample Bi obtained in Step4 2 O 3 / (BiO) 2 CO 3 The heterojunction is tested by XRD. The test pattern is like image 3 Shown. image 3 Shows that the sample obt...
Example Embodiment
[0049] Example 3
[0050] Step1: Mix 2.3mmol of bismuth nitrate pentahydrate and 3.0mmol of urea, dissolve in 30ml of deionized water, and stir for 30min at room temperature to form a precursor solution.
[0051] Step2: Transfer the precursor solution obtained in Step1 to an autoclave lined with polytetrafluoroethylene, keep it at 160°C for 12h, and cool to room temperature along with the furnace.
[0052] Step3: Wash the powder obtained in Step2 with deionized water and absolute ethanol in turn, and then vacuum dry at 80℃ to obtain (BiO) 2 CO 3 powder.
[0053] Step4: Get the (BiO) from Step3 2 CO 3 The powder is calcined at 400℃ for 20min, then Bi with visible light catalytic activity is obtained 2 O 3 / (BiO) 2 CO 3 Heterojunction catalyst.
[0054] For the sample Bi obtained in Step4 2 O 3 / (BiO) 2 CO 3 The heterojunction is tested by XRD. The test pattern is like Figure 5 Shown. Figure 5 Shows that the sample obtained in Step 4 is indeed Bi 2 O 3 / (BiO) 2 CO 3 Heterojunction.
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