Polyoxometallate organic composite film material with photoelectric conversion property
A technology of polyoxometalates and composite materials, applied in the field of inorganic-organic composite thin film materials, to achieve good photoelectric conversion performance
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Embodiment 1
[0014] Example 1: Preparation of phosphorus tungsten zinc polyoxometalate and crystal violet composite material
[0015] Weigh 6.60g of sodium tungstate dihydrate and 0.28g of sodium dihydrogen phosphate dihydrate and dissolve them in 25ml of distilled water to obtain solution A; under magnetic stirring and at the same time monitored by a pH meter, add concentrated nitric acid dropwise to solution A to adjust the pH of the solution After reaching 4.8, heat solution A to 85°C, heat and stir for 20 minutes.
[0016] Weigh 0.71g of zinc nitrate hexahydrate and dissolve it in 3ml of distilled water, add the zinc nitrate solution dropwise to solution A, adjust the pH value of the solution to 4.5, and continue stirring for 40min to obtain solution B.
[0017] Weigh 0.08g of crystal violet and dissolve it in 10ml of distilled water, slowly add the crystal violet solution into solution B, stir magnetically for 2 minutes, and let stand for 1 hour to produce a purple precipitate, filter...
Embodiment 2
[0019] Example 2: CVPW 11 Preparation of Zn thin film
[0020] Immerse a quartz or conductive glass substrate in NH 3 ·H 2 O, H 2 o 2 and H 2 O mixed solution (volume ratio = 1:1:5), heated at 70° C. for 20 min, washed with deionized water, dried, and set aside.
[0021] Aspirate 60 μL of CVPW with a microsampler 11 Saturated solution of Zn in acetonitrile, spread evenly on 1cm 2 Conductive glass or quartz glass substrate, dry for use.
[0022] CVPW 11 The determination of the ultraviolet-visible absorption spectrum of the Zn thin film on the quartz substrate was carried out on a Cary-50 ultraviolet-visible spectrophotometer of Varian Company of the United States. UV-Vis absorption spectrum shows: CVPW 11 Zn film ( figure 2 Curve b) shows two absorption bands at 299nm (A=0.166) and 580nm (A=0.222), which is different from the CV aqueous solution ( figure 2 Curve a) The π→π* transitions at 298nm (A=0.207) and 582nm (A=0.683) are consistent with the charge transfer...
Embodiment 3
[0023] Example 3: CVPW 11 Photoelectric conversion test of Zn thin film
[0024] The specific process of the photoelectric conversion experiment measurement of the film is: at room temperature, on the conductive glass substrate (the effective area is 0.28cm 2 ) deposited CVPW 11 The Zn film is the working electrode, the platinum wire is the counter electrode, and the saturated calomel electrode (SCE) is the reference electrode. The three electrodes are placed in 0.1mol / L Na 2 SO 4 In the aqueous solution, the 500W ultra-high pressure spherical xenon lamp high-brightness light source system of Beijing Changtuo Technology Co., Ltd. is used to simulate sunlight (730nm>λ>325nm, and the light intensity is 100mW / cm 2 ) to irradiate the working electrode, and the incident light intensity was measured by a radiometer calibrated with a standard silicon cell (Optical Instrument Factory, Beijing Normal University).
[0025] The CVPW that embodiment 2 prepares 11 0.1mol / L Na of Zn fi...
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