Bismuth oxyiodide/zinc oxide composite material and preparation method thereof, and applications in piezoelectric-photocatalytic removal of organic pollutants
A technology of bismuth iodide and composite materials, which can be applied in water pollutants, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as reducing sunlight utilization efficiency, and achieve improved photocatalytic performance, good piezoelectric performance, The effect of topography rules
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[0031] The preparation method of bismuth iodide oxide / zinc oxide composite material of the present invention is as follows:
[0032] (1) The conductive substrate spin-coated with ZnO seed solution was annealed and then added to the precursor solution to obtain ZnO nanorod arrays (ZnO NRs);
[0033] (2) The zinc oxide nanorod arrays were added to the bismuth oxyiodide precursor solution, and the bismuth oxyiodide / zinc oxide composite material (BiOI / ZnO NAs) was obtained by reaction.
[0034] Different from the prior art, the present invention adds the zinc oxide nanorod array to the solution containing both bismuth and iodine instead of step by step, and the obtained product has good performance.
Embodiment 1
[0036] The preparation of zinc oxide seed crystal layer on the ITO glass, concrete steps are as follows:
[0037] First put the ITO conductive glass (1.5*3 cm 2 ) with ethanol, acetone, and deionized water (volume ratio 1:1:1) in an ultrasonic instrument for 30 minutes, and then 0.7437 g of zinc nitrate hexahydrate and 0.3505 g of hexamethylenetetramine were dissolved in 5 ml to In ionized water, zinc nitrate aqueous solution and hexamethylenetetramine aqueous solution were respectively obtained; clean ITO glass was placed on a spin coater, and about 1 ml of the above-mentioned zinc nitrate aqueous solution and hexamethylenetetramine solution were successively added dropwise on the conductive surface of ITO glass. Tetraamine aqueous solution, spin coating at 2000 rpm for 30s and then let it stand for 5 minutes; after the above operations were completed, it was dried and placed in a tube furnace, and kept at 320 °C for 30 minutes in an air atmosphere, with a heating rate of 5 °...
Embodiment 2
[0039] The preparation of zinc oxide nanorod arrays, the specific steps are as follows:
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