二氧化钛/石墨氮化碳复合材料对棒曲霉素的吸附与光催化降解作用研究  

Adsorption and photocatalytic degradation of patulin by titanium dioxid/graphite carbon nitride composites

作　　者：杨佳毅 孙淑敏[1,2] 李佳骏 谢岩黎 YANG Jia-Yi;SUN Shu-Min;LI Jia-Jun;XIE Yan-Li(College of Food Science and Engineering,Henan University of Technology,Zhengzhou 450001,China;Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control,Zhengzhou 450001,China)

机构地区：[1]河南工业大学粮油食品学院,郑州450001 [2]河南省粮油食品安全检测与控制重点实验室,郑州450001

出　　处：《食品安全质量检测学报》2023年第20期260-268,共9页Journal of Food Safety and Quality

基　　金：省级科技研发计划联合基金项目(222103810079);河南工业大学青年骨干教师培育计划项目(21420144);国家自然科学基金项目(32001808)。

摘　　要：目的探究二氧化钛/石墨氮化碳(titanium dioxid/graphite carbon nitride,TiO_(2)/g-C_(3)N_(4))复合材料对棒曲霉素(patulin,PAT)的吸附与光催化降解作用。方法通过超声混合后再煅烧的方法制备TiO_(2)和g-C_(3)N_(4)的复合材料(TiO_(2)/g-C_(3)N_(4))。分别使用傅里叶转换红外光谱分析仪(Fourier transform infrared spectrometer,FTIR)和比表面及孔径分析仪(specific surface and aperture analyzer,BET)对3种材料进行测试分析,并研究单一材料与复合材料分别对PAT的吸附作用、复合材料在可见光下的光催化效果及暗吸附与光降解之间的协同作用。结果TiO_(2)/g-C_(3)N_(4)复合材料的FTIR图中出现了TiO_(2)的特征峰O-H基团和Ti-O、g-C_(3)N_(4)的特征峰C=N和CN,表明成功合成了TiO_(2)/g-C_(3)N_(4)复合材料。结果表明TiO_(2)和g-C_(3)N_(4)复合后的吸附及光催化降解效果明显优于单一材料,且TiO_(2)/g-C_(3)N_(4)复合材料暗吸附与光降解之间存在协同作用,在温度为30℃、复合材料添加量为10 mg、吸附时间3 min、光照时间5 min时,可完全降解初始质量浓度为0.5μg/mL的PAT。此外,TiO_(2)/g-C_(3)N_(4)对PAT的吸附存在多分子层化学吸附,且过程符合准二级动力学模型,对PAT的光催化降解过程符合准一级动力学模型。结论该复合材料可快速、高效地去除PAT,因此在果蔬及其制品、谷物和饲料中PAT的去除方面有较好的应用前景。Objective To investigate the adsorption and photocatalytic degradation of patulin(PAT)by titanium dioxid/graphite carbon nitride(TiO_(2)/g-C_(3)N_(4))composites.Methods TiO_(2) and g-C_(3)N_(4) composites(TiO_(2)/g-C_(3)N_(4))were prepared by ultrasonic mixing and then calcination.Fourier transform infrared spectrometer(FTIR)and specific surface and aperture analyzer(BET)were used to test and analyze three materials,and the adsorption effect of single material and composite on PAT,the photocatalytic degradation effect of composite under visible light,and the synergistic effect between dark adsorption and photocatalysis were studied.Results In the FTIR diagram of TiO_(2)/g-C_(3)N_(4) composites,the O-H group of TiO_(2) characteristic peaks and the C=N and CN of Ti-O and g-C_(3)N_(4) characteristic peaks appear,indicating that TiO_(2)/g-C_(3)N_(4) composites were successfully synthesized.The results showed that the adsorption and photocatalytic degradation effects of TiO_(2) and g-C_(3)N_(4) composite were significantly better than that of single material,and there was a synergistic effect between TiO_(2)/g-C_(3)N_(4) composite dark adsorption and photocatalysis.When the temperature was 30℃,the addition amount of the composite was 10 mg,the adsorption time was 3 min,and the photocatalytic degradation time was 5 min,the removal rate of PAT at the initial mass concentration of 0.5μg/mL could reach 100%.In addition,the adsorption of PAT by TiO_(2)/g-C_(3)N_(4) had multi-molecular layer chemisorption,and the process accorded with the quasi-second-order kinetic model,and the photocatalytic degradation process of PAT accorded with the quasi-first-order kinetic model.Conclusion The composite material can remove PAT quickly and efficiently,so it has a good application prospect in the removal of PAT in fruits and vegetables and their products,grains and feeds.

关 键 词：二氧化钛/石墨氮化碳复合材料 棒曲霉素 吸附 光降解 

分 类 号：TS205[轻工技术与工程—食品科学] O643.36[轻工技术与工程—食品科学与工程] O644.1[理学—物理化学]