Composite titanium dioxide mesoporous thin membrane electrode material and preparation method thereof

Abstract

The invention discloses a composite titanium dioxide mesoporous thin membrane electrode material and a preparation method thereof. The preparation method comprises the steps: adding a titanium sourcecompound and an antimony source compound into a hydrochloric acid solution, stirring and mixing, carrying out a hydrothermal reaction to obtain a precursor solution, and carrying out spray drying andhigh-temperature calcination on the solution to obtain a mesoporous hollow spherical antimony-doped titanium dioxide composite material; putting the obtained material into a hydrochloric acid solution, carrying out ultrasonic dispersion, adding a pyrrole monomer under a stirring condition, uniformly stirring, dropwise adding an oxidant, standing after the reaction is finished, filtering, and drying to obtain a polypyrrole@antimony / titanium dioxide composite material; and uniformly mixing the prepared polypyrrole@antimony / titanium dioxide composite material with polyvinylidene fluoride, adding1-methyl-2-pyrrolidone to blend slurry, uniformly coating a conductive substrate with the slurry, drying, and calcining to obtain the thin membrane electrode material. According to the composite thinmembrane material prepared by the invention, the photoelectric property of the titanium dioxide electrode material is remarkably improved, the structure is compact, and the performance is stable.

Description

technical field [0001] The invention belongs to the field of photoelectric conversion, photovoltaic cell or thin film battery, and in particular relates to a composite titanium dioxide mesoporous thin film electrode material and a preparation method thereof. Background technique [0002] Titanium dioxide, as a semiconductor material, has attracted extensive attention as a promising electrode material for supercapacitors in recent years, however, TiO 2 The band gap energy is large, the recombination rate of photogenerated carriers is high, the utilization rate of solar energy is low, and the quantum efficiency is low. Therefore, it is necessary to improve the TiO-based 2 The utilization rate of visible light of the electrode and the recombination probability of electron-hole pairs are reduced. At present, the specific modification methods include ion doping, noble metal deposition, semiconductor compounding, organic dye modification and other methods. Although metal ion dop...

AI Technical Summary

Problems solved by technology

[0002] Titanium dioxide, as a semiconductor material, has attracted extensive attention as a promising electrode material for supercapacitors in recent years, however, TiO 2 The band gap energy is large, the recombination rate of photogenerated carriers is high, the utilization rate of solar energy is low, and the quantum efficiency is low. Therefore, it is necessary to improve the TiO-based 2 Utilization of visible light of electrodes and reduction of recombination probability of electron-hole pairs

Although metal ion doping and heavy metal deposition can improve TiO 2 It is active under visible light, but because metal ions are easy to form electron-hole recombination centers, it is necessary to precisely control the doping concentration. If the concentration is too high, it is easy to generate metal clusters and block TiO 2 surface, making TiO 2 The activity under ultraviolet light decreases or the activity under visible light is much lower than that under ultraviolet light; at the same time, the cost of metal doping is high and makes TiO 2 The stability becomes worse

The stability and service life of semiconductor composite materials are often unsatisfactory, and most organic dyes are toxic and easy to pollute the environment