A kind of eggshell loaded zinc oxide material and its preparation method and application
A zinc oxide, eggshell technology, applied in chemical instruments and methods, other chemical processes, chemical/physical processes, etc., can solve the problems of environmental pollution, low utilization rate of discarded eggshells, etc., to achieve easy recovery and avoid loss of zinc oxide , the effect of avoiding secondary pollution
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Embodiment 1
[0029] Take 3g of eggshells, ultrasonically clean them with deionized water and soak for 1 hour, then put the washed eggshells into 50mL of 0.5% silane coupling agent (KH550) for 4 hours, then put them into 50mL of 0.1mol / L zinc acetate solution, and slowly add 10mL, 1mol / L sodium hydroxide solution dropwise, after the dropwise addition, stir for 2 hours, microwave heating for 30 minutes, naturally cool to room temperature, wash, and dry to obtain the target product. The samples were characterized by X-ray diffractometer (XRD), such as figure 1 As shown, three strong peaks appeared at 2θ of 31.65°, 34.44° and 36.24°, corresponding to the (100), (002), and (101) crystal planes of zinc oxide, respectively. The analysis showed that zinc oxide was successfully loaded on the eggshell.
Embodiment 2
[0031] Take 3g of eggshells, ultrasonically clean them with deionized water and soak for 1 hour, then put the washed eggshells into 50mL of titanate coupling agent with a concentration of 1.0% and soak for 5 hours, then put them into 50mL of 0.1mol / L of zinc nitrate solution, and slowly added dropwise 10mL, 1mol / L ammonia water, after the dropwise addition, stirred for 1 hour, microwaved for 50 minutes, naturally cooled to room temperature, washed, and dried to obtain the target product. Samples were characterized by scanning electron microscopy (SEM), such as figure 2 As shown, the eggshell membrane is in the shape of interwoven fiber network, and the zinc oxide particles are uniformly and tightly loaded on the eggshell membrane, and the zinc oxide particles are in the shape of an ellipsoid.
Embodiment 3
[0033] Take 3g of eggshells, ultrasonically clean them with deionized water and soak for 1 hour, then put the washed eggshells into 50mL of 1% silane coupling agent (KH560) for 6 hours, then put them into 50mL of 0.1mol / L zinc chloride solution, and slowly add 10mL, 1mol / L sodium hydroxide solution dropwise, after the dropwise addition, stir for 2 hours, microwave heating for 1 hour, naturally cool to room temperature, wash, and dry to obtain the target product. Use 50mL rhodamine B (12mg / L) as the pollution solution, compare with the blank sample, test the ability of eggshell (ES) to absorb pollutants, and test the eggshell-loaded zinc oxide material (ES-ZnO) under ultraviolet light irradiation The ability to degrade pollutants, the results are as follows image 3 As shown, it can be seen from the figure that the concentration of rhodamine B in the solution gradually decreases with the prolongation of time; after adding eggshell, the egg membrane in the eggshell has a strong...
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