Synthesis of ZnO/reduced graphene oxide and their photocatalytic performance
ZHENG Xinyang
ZHAO Shikai
ZHANG Wangxi
LYU Cui
LIANG Baoyan
Abstract：Graphene oxide and various ZnO precursors(nano-ZnO,Zn(OH)2,Zn2(OH)2CO3)powders were used as raw materials to prepare ZnO/reduced graphene oxide composites through low-temperature heat treatment.The influence of different ZnO precursors on the phase composition,morphology,and photocatalytic performance of the resultant products was studied.The research results showed that graphene oxide underwent a reduction reaction during heating,primarily occurring within the temperature range of approximately 140～220℃.After heat treatment at 250℃for 2 h,graphene oxide was reduced to reduced graphene oxide.Using different ZnO precursors and graphene oxide powders,ZnO/reduced graphene oxide composites can be prepared through low-temperature heat treatment.Composites prepared using different ZnO precursors exhibited significant differences in their micromorphology,light absorption capacity,and photocatalytic performance.UV-Vis diffuse reflectance spectroscopy analysis indicated that the composites prepared using Zn(OH)2 and Zn2(OH)2CO3 as precursors demonstrated stronger absorption of both ultraviolet and visible light compared to those using nano-ZnO directly as the precursor.In the photocatalytic degradation of methylene blue,the time required for complete degradation by the ZnO/reduced graphene oxide composites prepared using nano-ZnO,Zn(OH)2,and Zn2(OH)2CO3 as precursors was 34,24,and 90 minutes,respectively.In contrast,pure nano-ZnO required 150 minutes.These results demonstrate that the ZnO/reduced graphene oxide composites can significantly enhance photocatalytic performance.
Keywords：graphene oxideprecursorsreduced graphene oxidelow-temperature heat treatmentcomposite
Publication Date：2025-12-25
Online Publishing Date：2026-01-27(First online date of this platform, not the publication date of the document)
Pages：6( 38-43 )