TiO_(2)/石墨烯基复合材料表征及光催化降解VOCs的研究  

Characterization of TiO_(2)/graphene-based composites and photocatalytic degradation of VOCs

作　　者：齐俊红 徐丽慧[1,2] 陈嘉阳 王黎明 潘虹[1,2] QI Junhong;XU Lihui;CHEN Jiayang;WANG Liming;PAN Hong(Fashion College,Shanghai University of Engineering Science,Shanghai 201620,China;National Innovation Center of Advanced Dyeing&Finishing Technology,Tai’an 271000,China;High School Attached to Shanghai Normal University Campus,Shanghai 200120,China)

机构地区：[1]上海工程技术大学纺织服装学院,上海201620 [2]国家先进印染技术创新中心,山东泰安271000 [3]上海师范大学附属中学闵行分校,上海200120

出　　处：《功能材料》2025年第3期3134-3142,3164,共10页Journal of Functional Materials

基　　金：国家自然科学基金项目(51703123);上海市自然科学基金项目面上项目(21ZR1426200);国家先进印染技术创新中心科研基金项目(2022GCJJ22)。

摘　　要：研究采用自组装溶剂热法,以二氧化钛(TiO_(2))和氧化石墨烯(GO)为原料,成功制备了TiO_(2)/rGO复合材料。通过对复合材料进行扫描(SEM)观察发现,TiO_(2)颗粒均匀地分散在还原氧化石墨烯(rGO)的片层上,形成了良好的接触界面;X射线衍射(XRD)图谱证实了TiO_(2)具有锐钛矿相结构,并且rGO的存在并未对TiO_(2)的晶型产生显著影响;X射线光电子能谱(XPS)分析揭示了TiO_(2)与rGO之间发生了电子转移,这对于提高复合材料的光催化性能是有利的。为了评估TiO_(2)/rGO复合材料的光催化活性,选择了“五苯三醛”作为挥发性有机化合物(VOCs)的模型污染物,并在模拟的车内环境中进行了实验。实验中使用了不同浓度的VOCs(15~25 mg/m^(3)),并在100 W白炽灯和500 W氙灯两种光源下进行了光催化降解测试。实验结果表明,在100 W白炽灯照射480 min后,15%(质量分数)TiO_(2)/rGO-6h复合材料对VOCs的降解率分别为41.7%、46.6%和65.3%;而在500W氙灯下,降解效率显著提高到了51.33%、72.89%和78.3%。相比之下,纯TiO_(2)在相同条件下的光催化效率较低,TiO_(2)/rGO复合材料在光催化活性方面有显著提升,并且在广泛的VOCs浓度范围内表现出了高效稳定的光催化活性,特别是在氙灯照射下,其光催化性能明显优于纯TiO_(2)。这项工作为解决车内及大气中的VOCs污染问题提供了新思路,并为进一步开发高效的光催化剂材料打下了坚实的基础。In this study,TiO_(2)/rGO composites were successfully prepared using titanium dioxide(TiO_(2))and graphene oxide(GO)as raw materials by self-assembly solvent-thermal method.Scanning(SEM)observation of the composites revealed that the TiO_(2)particles were uniformly dispersed on the flakes of reduced graphene oxide(rGO),forming a good contact interface.X-ray diffraction(XRD)patterns confirmed that the TiO_(2)had a anatase phase structure and the presence of rGO did not have a significant effect on the crystalline form of the TiO_(2).X-ray photoelectron spectroscopy(XPS)analysis revealed that the electron transfers between TiO_(2)and rGO occurred,which was favourable for improving the photocatalytic performance of the composites.In order to evaluate the photocatalytic activity of TiO_(2)/rGO composites,pentaphenyltrial was selected as a model pollutant for volatile organic compounds(VOCs),and the experiments were carried out in a simulated in-vehicle environment.Different concentrations of VOCs(15-25 mg/m^(3))were used in the experiments,and the photocatalytic degradation tests were conducted under two light sources,100 W incandescent lamp and 500 W xenon lamp.The experimental results showed that the degradation rates of VOCs by 15 wt%TiO_(2)/rGO-6h composites were 41.7%,46.6%,and 65.3%,respectively,after irradiation with 100 W incandescent lamp for 480 min,while the degradation efficiencies were significantly increased to 51.33%,72.89%,and 78.3%under 500 W xenon lamp.In contrast to the lower photocatalytic efficiency of pure TiO_(2)under the same conditions,the TiO_(2)/rGO composites showed a significant improvement in photocatalytic activity and exhibited efficient and stable photocatalytic activity over a wide range of VOCs concentrations,especially under xenon lamp irradiation,and their photocatalytic performance was significantly superior to that of pure TiO_(2).This work provides a new idea to solve the problem of VOCs pollution in vehicles and the atmosphere and lays a solid foundation for the further devel

关 键 词：TiO_(2) 还原氧化石墨烯 不同光源 VOCS 光催化活性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]