Method for preparing porous Bi5O7I material in inert atmosphere
A technology of inert atmosphere and bismuth salt, which is applied in the field of porous photocatalytic material preparation, can solve the problem that porous Bi has not yet been retrieved, and achieve the effect of being suitable for mass industrial production, easy process and mild reaction conditions
Active Publication Date: 2021-08-24
SHANDONG UNIV OF TECH
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Problems solved by technology
So far, the preparation of porous Bi under inert conditions has not been retrieved 5 o 7 Related reports on I materials
Method used
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Embodiment 1
[0026] Ultrasonic disperse 4mmol of bismuth nitrate in 30ml of deionized water, stir well to form solution A; dissolve 4mmol of potassium iodide in 30ml of deionized water to form solution B; quickly pour solution B into solution A, adjust pH=1.5 and stir for 40min. Transfer the mixed solution into a 100ml hydrothermal reaction kettle, conduct a hydrothermal reaction at 160°C for 6 hours, cool, centrifuge, and wash to obtain sample S2. The S2 sample was transferred to a tube furnace under an argon atmosphere and kept at 450°C for 60 minutes to obtain a pale yellow porous Bi5O7I sample.
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The invention relates to the technical field of preparation of porous photocatalytic materials, and particularly provides a preparation method of a porous Bi5O7I material. Specifically, iodized salt and bismuth salt are dissolved in water, pH and nitrate concentration are adjusted, a hydrothermal reaction is performed to obtain an intermediate product A, and the intermediate product A is calcined in an inert atmosphere to obtain a porous Bi5O7I sample. The prepared Bi5O7I sample is obtained in the inert atmosphere, and compared with an eutrophic condition, the Bi5O7I sample is higher in catalytic activity. Pore structures are uniformly distributed on the surface of the prepared material, and the sizes of the pore structures can be adjusted along with change of technological parameters. The prepared porous Bi5O7I material has abundant surface defects, and the photocatalytic performance of the porous Bi5O7I material can be effectively regulated and controlled. The preparation method is easy to adjust, simple to operate, mild in reaction condition and suitable for large-scale industrial production.
Description
technical field [0001] The invention relates to the technical field of preparation of porous photocatalytic materials, in particular to a porous Bi 5 o 7 The preparation method of I material. Background technique [0002] Two-dimensional semiconductor materials can shorten the transport distance of semiconductor carriers, reduce the probability of electron-hole recombination, and greatly improve the photocatalytic performance of semiconductor materials. However, the effective separation of electron-hole pairs in the plane of two-dimensional semiconductor materials can only be regulated by conventional methods such as in-plane defects, construction of heterojunction systems, and deposition of metal particles. The type, concentration, and distribution of defects have uncertain effects on material properties, and it is difficult to accurately control the catalytic activity. Conventional strategies such as defect states, heterojunctions, and noble metal modification only work ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01J27/06B01J35/10B01J37/10C01G29/00
CPCB01J27/06B01J37/10C01G29/00C01P2002/72C01P2004/03C01P2004/04C01P2002/85B01J35/39B01J35/40B01J35/60B01J35/66
Inventor 李中付张静静袁程远刘从华吴朝辉张世英
Owner SHANDONG UNIV OF TECH
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