The invention provides an in-situ preparation method and application of an Ag / AgCl / NH2-MIL-101(Fe) composite photocatalyst with a spindle appearance, and belongs to the technical field of environmental
pollution improvement. The in-situ preparation method comprises the following steps: preparing a NH2-MIL-101(Fe) nanometer material with a regular hexagon-shaped section and a spindle appearance according to a solvothermal method by taking FeCl3.6H2O and 2-amino-
terephthalic acid as raw materials, wherein the average length of the edges of the nanometer material is about 700 nm, and the average length of the sides of the regular hexagon-shaped cross section is about 200 nm; preparing the Ag / AgCl / NH2-MIL-101(Fe) composite photocatalyst with the spindle appearance in situ according to an
ultraviolet light reduction method. According to the method, the reaction between Cl- in the NH2-MIL-101(Fe) nanometer material and Ag+ in a
silver nitrate solution, and the reducing action of
ultraviolet light are utilized, and no other exogenous
chlorine source is added, so that the in-situ preparation method is simple, convenient, and mild in condition; Ag / AgCl nano-particles are loaded on the NH2-MIL-101(Fe) nanometer material;
electron transfer efficiency is further improved via the surface
plasma resonance effect, so that the recombination probability of
photogenerated electron-hole pairs is reduced, and
gaseous pollutants are effectively degraded.