Synthesis method of transition-metal-doped g-C3N4 composite gas sensitive material loaded on porous zinc oxide nanosheet
A technology of porous zinc oxide and transition metals, which is applied in the direction of material analysis, material resistance, and analysis of materials through electromagnetic means, and can solve the problems of non-gas sensitivity, unfavorable online detection of analysis and detection, sample pretreatment and complex detection procedures, etc. problems, to achieve the effect of optimizing gas sensing performance, improving permeability, and improving response sensitivity
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Embodiment 1
[0046] A porous ZnO nanosheet supported transition metal doped g-C 3 N 4 The synthetic method of composite gas-sensitive material comprises steps as follows:
[0047] (1) Add 15ml 0.2mol / L zinc acetate aqueous solution to 15ml 0.4mol / L urea aqueous solution, ultrasonically disperse for 10min, and then transfer the mixed solution to a 50mL stainless steel autoclave lined with polytetrafluoroethylene , and make it react in an oven at 120°C for 5h. Naturally cool to room temperature, centrifuge and wash with deionized water for 3 times, put in an oven and dry at 60°C for 12 hours to obtain basic zinc carbonate;
[0048] 1g dicyandiamide and 0.1g FeCl 2 Add 15ml of deionized water, stir and mix evenly, heat at 80°C until the water in the solution evaporates to dryness, and then put it in an oven to dry at 60°C for 12 hours. The dried product was calcined at 550 °C for 4 h under the protection of a nitrogen atmosphere in a tube furnace, and cooled naturally to room temperature ...
Embodiment 2
[0054] As described in Example 1, the difference is that 0.1g Cu(NO 3 ) 2 Instead of 0.1g FeCl 2 .
[0055] figure 2 The porous ZnO nanosheets prepared for this example supported copper-doped g-C 3 N 4 The transmission electron microscope photo of the composite gas-sensitive material, by figure 2 It can be seen that material recombination is realized on the surface of porous zinc oxide nanosheets.
[0056] Figure 7 The porous ZnO nanosheets prepared for this example supported copper-doped g-C 3 N 4 X-ray diffraction patterns of composite gas-sensitive materials, by Figure 7 It can be seen that, in addition to the diffraction peak of wurtzite zinc oxide (corresponding to the standard card JCPDS No.36-1451), g-C 3 N 4 Diffraction peaks (corresponding to g-C 3 N 4 (002) crystal plane), without other miscellaneous peaks.
[0057] Figure 11 The porous ZnO nanosheets prepared for this example supported copper-doped g-C 3 N 4 The electron spectrum of the composi...
Embodiment 3
[0059] As described in Example 1, the difference is that 0.06g MnCl is used in step (2) 2 Instead of 0.1g FeCl 2 .
[0060] image 3 The porous ZnO nanosheets prepared for this example supported manganese-doped g-C 3 N 4 The transmission electron microscope photo of the composite gas-sensitive material, by image 3 It can be seen that material recombination is realized on the surface of porous zinc oxide nanosheets.
[0061] Figure 8 The porous ZnO nanosheets prepared for this example supported manganese-doped g-C 3 N 4 X-ray diffraction patterns of composite gas-sensitive materials, by Figure 8 It can be seen that, in addition to the diffraction peak of wurtzite zinc oxide (corresponding to the standard card JCPDS No.36-1451), g-C 3 N 4 Diffraction peaks (corresponding to g-C 3 N 4 (002) crystal plane), without other miscellaneous peaks.
[0062] Figure 12 The porous ZnO nanosheets prepared for this example supported manganese-doped g-C 3 N 4The electron sp...
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