Covalent organic material film as well as preparation method and application thereof
A covalent organic, material thin film technology, applied in the analysis of materials, material electrochemical variables, material analysis by electromagnetic means, etc., can solve problems such as low sensitivity, and achieve the effects of high sensitivity, high conductivity, and improved photocurrent
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[0040] In one or some embodiments of the present disclosure, a method for preparing a covalent organic material film is provided, which includes the following steps: 2,6-dihydroxynaphthalene and 1,3,5-tris(4-aminophenyl)amine are respectively Dissolve in the mixed solution, and then mix the two sets of solutions together to form a covalent organic material solution, drop the covalent organic material solution on the surface of the substrate, evaporate to dryness, and obtain the product.
[0041] Preferably, the mass ratio of 2,6-dihydroxynaphthalene to 1,3,5-tris(4-aminophenyl)amine is 1:1.
[0042] Preferably, the mixed solution is trimethylbenzene, ethanol and glacial acetic acid.
[0043] Further preferably, the volume ratio of the three is 5:5:1.
[0044] Preferably, the two sets of solutions are mixed at a volume ratio of 1:1.
[0045] In one or some embodiments of the present disclosure, a photoelectrochemical electrode is provided, in which the above covalent organic ...
Embodiment 1
[0075] Synthesis of D-TA COF film on ITO
[0076] 2,6-dihydroxynaphthalene (DHNDA, 1 mg) and 1,3,5-tris(4-aminophenyl)amine (TAPA, 1 mg) were dissolved in mesitylene, ethanol and glacial acetic acid (v / v / v 5:5:1, 550μL) in the mixed solution. Then mix DHNDA and TAPA together in a volume ratio of 1:1. Immediately thereafter, 20 μL of the mixed solution was dropped onto the surface of ITO (1 cm×2 cm), and kept at room temperature for 10 minutes in a closed system. Next, the ITO glass was immersed in dichloromethane for 5 min to remove unreacted residues and dried at room temperature to obtain a uniform red-brown film on the ITO surface.
[0077] Construction of PEC biosensors
[0078] Before preparing the electrode, ultrasonically clean the ITO electrode (1 cm × 2 cm) in acetone, ethanol, sodium hydroxide solution (1 M) dissolved in ethanol / water mixed solution (v / v, 1:1), and ultrapure water, respectively 15min, with N 2 blow dry. Then follow the steps above to modif...
Embodiment 2
[0084] Synthesis and Characterization of D-TA COF Membrane
[0085] The selection and preparation of optoelectronic active materials are closely related to the sensing performance of PECs. To obtain a stable photocurrent density, an ideal photoactive electrode should have high stability, reproducibility, ease of fabrication, and low electron-hole recombination rate. In this work, the in situ growth of D-TA COF thin films was synthesized by Schiff base co-condensation reaction of DHNDA and TAPA monomers in a few minutes under very simple and mild conditions ( figure 1 A). This reaction can be easily carried out without high temperature, high pressure or addition of metal catalysts. The formed film is reddish-brown and glossy, with uniform morphology and high crystallinity ( figure 1 Inset of A). By this method, 4,4'-biphenyldicarbaldehyde and TAPA or 1,4-phthalaldehyde and TAPA or DHNDA and 1,3,5-tris(4-aminophenyl)benzene (TAPB ) synthesized three other COF membranes (B...
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