西北师范大学学报（自然科学版）2025，Vol.61Issue(6)：53-62,73,11.DOI:10.16783/j.cnki.nwnuz.2025.06.007
MMT/BiOIO3复合材料光催化降解酸性品红
Photocatalytic degradation of acid fuchsin in wastewater using MMT/BiOIO3 composite materials
摘要
Abstract
To address the shortcomings of BiOIO3,such as narrow absorption range,high recombination rate of photogenerated electrons and holes,a series of organically modified montmorillonite-supported BiOIO3 composites(MMT/BiOIO3)were prepared using hexadecyltrimethyl ammonium bromide(CTAB)-modified montmorillonite,bismuth nitrate and potassium iodate as raw materials by hydrothermal method.Compared to pure BiOIO3,the absorption edge of 20%MMT/BiOIO3 composite,which possesses a larger specific surface area,occurs a slight red shift and its light absorption intensity is stronger from 390 nm to 600 nm in UV-vis DSR.The fluorescence intensity of the composite located near 579 nm is the lowest in all samples and half circular diameter is smaller.These results indicate that the electrostatic attractions between modified montmorillonite and photogenerated electron improve the separation rate of photo generated charge carriers.The composite has photocatalytic degradation activity including acid fuchsin(AF),methyl orange(MO),malachite green(MG),crystal violet(CV),rhodamine B(RhB),and tetracycline hydrochloride(TC).Among these,the photocatalytic degradation effect on acid fuchsin is the most significant.Photodegradation experiment results showed that the removal rate of 20 mg·L-1 AF is 99.6%by 20 mg 20%MMT/BiOIO3 as catalyst with 60 min of light irradiation.After five consecutive photodegradation cycles,the removal rate is decreased by only 4.1%.The built-in electric field formed between the organically modified montmorillonite and BiOIO3 facilitates the migration of photogenerated electrons on the material's surface,improving the separation rate of photogenerated carriers.A large number of holes have undergone photodegradation reactions with AF molecules and the photodegradation efficiency of BiOIO3 is improved for AF.关键词
BiOIO3/改性蒙脱土/MMT/BiOIO3/光催化降解/酸性品红Key words
BiOIO3/modified montmorillonite/MMT/BiOIO3/photocatalytic degradation/acid fuchsin分类
化学化工引用本文复制引用
康芸霞,王涛,余丹凤,陈世龙,汤雪婷,常玥..MMT/BiOIO3复合材料光催化降解酸性品红[J].西北师范大学学报（自然科学版）,2025,61(6):53-62,73,11.基金项目
国家自然科学基金资助项目(21544011) （21544011）
甘肃省高校产业支撑计划项目(2023CYZC-18) （2023CYZC-18）
