云南化工2025，Vol.52Issue(5)：44-48,5.DOI:10.3969/j.issn.1004-275X.2025.05.10
MgTiO3/TiO2复合材料的合成及其光催化-压电降解甲基橙
Synthesis of MgTiO3/TiO2 Composites and Its Photocatalytic-piezoelectric Degradation of Methyl Orange
摘要
Abstract
In this study,MgTiO3/TiO2 composites were successfully prepared by the molten salt method,aiming to solve the problems existing in the photocatalytic degradation of organic pollutants by pure TiO2,and significantly improve the degradation efficiency.The results showed that MgTiO3/TiO2 composites were successfully prepared under the optimum calcination temperature of 900 ℃ and calcination time of 3 hours.The composites were characterized and analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM)and Raman spectroscopy.The mechanism of MgTiO3/TiO2 composite in photocatalytic-piezoelectric degradation of methyl orange was further studied.It was found that when MgTiO3 and TiO2 were prepared with a molar ratio of 1∶1.5,the composite could effectively activate persulfate(PMS),thus producing more su-peroxide free radicals(·O2-)and hydroxyl free radicals(·OH).It has a significant promotion effect on the degradation reaction and can sig-nificantly accelerate the degradation rate of organic pollutants.After four cycles,the degradation efficiency of methyl orange(MO)remained a-bove 90％.The composite has shown excellent performance in the field of photocatalytic-piezoelectric degradation,which provides a valuable ref-erence for the development of efficient catalytic materials.关键词
钙钛矿/熔盐法/复合材料/压电催化/催化降解Key words
Perovskite/Molten Salt Method/Composite Material/Piezoelectric Catalysis/Catalytic Degradation分类
通用工业技术引用本文复制引用
郭天宇,刘欢,何亚娜,李姿源,马蓉,赵卫星..MgTiO3/TiO2复合材料的合成及其光催化-压电降解甲基橙[J].云南化工,2025,52(5):44-48,5.基金项目
陕西省重点研发计划项目资助(No:2020KW-041),陕西省高校压电新能源创新团队项目(No.24JP007),宝鸡文理学院省级大学生创新训练计划项目(No:S202410721085).钛基功能材料与器件陕西省高校工程研究中心(No.24JR007). （No:2020KW-041）
