A kind of polypeptide regulates zinc oxide to prepare no 2 gas sensor method
A gas sensor, gas sensor technology, applied in instruments, scientific instruments, measuring devices, etc., to achieve the effect of improving overall performance, beautiful appearance, and unified structure
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Embodiment 1
[0033] Using polypeptide PG-7 (amino acid sequence TMGANLGLKWPV) as regulator, the synthesis method of polypeptide regulating zinc oxide and its application in NO 2 The application in the gas sensor, the specific method is as follows:
[0034] Step 1: prepare zinc oxide nanomaterials; the preparation process is as follows:
[0035] Add an appropriate amount of 1mol / L sodium hydroxide solution to 20ml of 0.1mol / L zinc acetate solution dropwise, adjust the pH to 7, add 7mg PG-7 polypeptide, stir magnetically for 30min, and place the solution in a polytetrafluoroethylene reactor. In the process, the resulting precipitate was centrifuged and dried at 80 °C for 12 h to obtain zinc oxide nanomaterials.
[0036] Step 2: Preparation of NO 2 Gas sensor; its preparation process is as follows:
[0037] Mix 20 mg of the zinc oxide material obtained in step 1 into 2 ml of deionized water, and ultrasonically disperse it for 30 minutes to obtain a uniformly dispersed zinc oxide suspension...
Embodiment 2
[0042] Taking diphenylalanine dipeptide (L-Phe-L-Phe; FF) as a regulator, a method for synthesizing zinc oxide by polypeptide regulation is as follows:
[0043] Add 6 mg of FF polypeptide to a total of 20 ml of 0.01 mol / L zinc nitrate and 0.01 mol / L hexamethylenetetramine solution, and heat at 80°C for 12 h. Other steps are as described above, and the prepared zinc oxide SEM is as follows figure 2 b, its effect on different concentrations of NO 2 response as figure 2 d shown.
[0044] It can be seen from the figure that the zinc oxide regulated by the polypeptide exhibits a flower-like structure, compared with that without the addition of the polypeptide ( figure 2 In the zinc oxide of a), the zinc oxide grains added with the polypeptide are more consistent and have a more obvious flower-like structure, indicating that the polypeptide plays a good role in regulating and promoting the growth of zinc oxide during the growth process; NO 2 The sensor response value is higher...
Embodiment 3
[0046] Using polypeptide PG-7 (amino acid sequence TMGANLGLKWPV) as a regulator, the synthesis method of polypeptide regulation zinc oxide, the specific method is as follows:
[0047] Dissolve 150 mg of zinc nitrate and 600 mg of sodium hydroxide in 20 ml of deionized water, add 5 mg of PG-7 peptide after fully dissolving, and heat at 80 °C for 12 h. Other steps are as above to obtain zinc oxide such as image 3 b, its effect on different concentrations of NO 2 response as image 3 d shown.
[0048] It can be seen from the figure that the zinc oxide regulated by the polypeptide presents a more regular flower-like structure, compared with that without the addition of the polypeptide ( image 3 a), the zinc oxide crystals added with the polypeptide are more consistent and have a more obvious crystal structure, indicating that the polypeptide plays a good role in regulating and promoting the growth of zinc oxide in the growth process of zinc oxide, which can make zinc oxide fr...
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