▎ 摘　　要

NOVELTY - Preparing a semiconductor composite nanoparticle, involves: (S1) ultrasonic oxidation of multi-walled nanotubes (MWNTs) in a strong acid, followed by centrifugation, washing to neutralize, and drying to obtain o-MWNTs; (S2) dissolving graphene oxide (GO) and o-MWNTs in water, uniformly dispersing ultrasonically, and then adding sodium molybdate and 1,3-bis(3-mercaptopropyl)imidazolium bromide to the mixture, stirring and mixing, and then performing hydrothermal reaction, after centrifugation, washing and drying, and preparing black powder of molybdenum disulfide (MoS2)/GO/o-MWNTs; and (S3) dispersing the black powder of MoS2/GO/o-MWNTs in water, and uniformly adding chloroauric acid (HAuCl4) solution after ultrasonic dispersion, shaking uniformly and then standing for 20-40 minutes, then centrifuging, washing and drying to obtain composite nanoparticles of gold (Au)/MoS2/ GO/o-MWNTs. USE - The method is useful for preparing semiconductor composite nanoparticle used in photocatalysis, solar battery, supercapacitor, and lithium battery material (all claimed). ADVANTAGE - The synergistic effect of wall carbon nanotubes greatly improves the specific surface area, electrical conductivity, and catalytic performance of the Au /MoS2/GO/o MWNTs composite nanomaterials; and 1,3 di (3 mercaptopropyl) Imidazolium bromide has good electrical conductivity, which further improves the photocatalytic activity of the composite material.