PHOTOCATALYST FOR REMOVING HYDROXYPROPYL GUAR GUM IN BACKFLOW FLUID OF FRACTURING FLUID, PREPARATION METHOD FOR PHOTOCATALYST, AND APPLICATIONS THEREOF

摘要

A photocatalyst for removing hydroxypropyl guar gum in a backflow fluid of a fracturing fluid, a preparation method for the photocatalyst, and applications thereof, where the expression of the photocatalyst is Bi₅O₇Br_0.5I_0.5, the photocatalyst comes in powder form, the particle size of same is 12-15 nm, and the specific surface area thereof is 285-300 m²/g. The photocatalyst provides an enhanced response to visible light, has an increased specific surface area, and has a high activity in removing hydroxypropyl guar gum in the backflow fluid of the fracturing fluid. Moreover, the preparation method is simple, has mild conditions, and is applicable in the removal of hydroxypropyl guar gum in the backflow fluid of the fracturing fluid.