Method for preparing three-dimensional flower-shaped graphene/molybdenum disulfide composite loaded fibrous counter electrode

Abstract

The invention discloses a method for preparing a three-dimensional flower-shaped graphene / molybdenum disulfide composite loaded fibrous counter electrode. The method for preparing the three-dimensional flower-shaped graphene / molybdenum disulfide composite loaded fibrous counter electrode uses a one-step hydrothermal reduction method, to be specific, adding molybdic acid or the water solution of molybdenum oxide, ammonium thiocyanate and graphene oxide in a hydrothermal reactor, vertically immersing carbon fiber in the reaction liquid, carrying out hydrothermal reduction reaction for 12 to 36 hours under 160 to 200 degrees centigrade, taking out the carbon fiber after ending reacting, using deionized water and absolute ethyl alcohol to wash, and drying. The method for preparing the three-dimensional flower-shaped graphene / molybdenum disulfide composite loaded fibrous counter electrode has advantages of simple technique, moderate reaction condition, high yield, good reproducibility, easiness in scale production and the like; the photoelectric conversion rate of a dye-sensitized solar cell composed of the prepared fibrous counter electrode is obviously higher than that of a dye-sensitized solar cell composed of an MoS2 or platinum loaded fibrous counter electrode, and the method for preparing the three-dimensional flower-shaped graphene / molybdenum disulfide composite loaded fibrous counter electrode is important for promoting the commercial application of the dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a method for preparing a fibrous counter electrode loaded with a three-dimensional flower-like graphene / molybdenum disulfide composite material, and belongs to the technical field of solar cells. Background technique [0002] Transition metal layered binary compounds (MX 2 ) has attracted extensive attention from researchers in many fields such as physics, chemistry, and materials because of its good thermal, optical, electrical, mechanical, and catalytic properties and its potential application prospects in the field of solar energy. Nano molybdenum disulfide is one of the typical representatives. Molybdenum disulfide is (MoS 2 ) A compound with semiconducting properties, the crystal is composed of single or multiple layers of molybdenum disulfide, and has a "sandwich sandwich" layered structure. Its Mo-S facets are quite large, the specific surface area is large, and the reactivity is high. There is a strong covalent bond...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the preparation of the fibrous counter electrode mainly adopts a step-by-step method, that is, the counter electrode material is first synthesized, and then the counter electrode material is attached to the fibrous conductive substrate by impregnation or sol-gel method. The material and The bonding force between conductive substrates is relatively weak, and it is easy to peel off, resulting in low electrode stability, which affects its popularization and application

Images