Preparation method of rodlike structure graphene quantum dot/cerium oxide composite photocatalyst

• Main Authors: PEI HEBING, CHEN YING, JIA QIANQIAN, GUO RUIBIN, MO ZUNLI, ZHANG HONGJUAN
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2020
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a rodlike structure graphene quantum dot/cerium oxide composite photocatalyst. The rodlike structure graphene quantum dot/cerium oxide composite photocatalyst is prepared by thesteps: adding CeO2 nanoparticles into a graphene quantum dot aqueous solution, and after ultrasonically dispersing uniformly, transferring into a reaction kettle to perform hydrothermal reaction; andafter the reaction ends, cooling, centrifugally separating products, washing with ultrapure water and performing freeze drying. The rodlike composite material is obtained by taking CeO2 as a photocatalyst and GQDs as a photosensitive agent under the hydrothermal condition, wherein the surface of the CeO2 is wrapped with the GQDs. On one hand, in the hydrothermal treatment process, the GQDs outside the material achieve the structure guide effect, so that the composite material has optimized sequential rodlike special appearance; and on the other hand, the small-size GQDs are on the surface ofthe CeO2, so the electron-c