不同钛酸四丁酯含量对GO-TiO_(2)复合材料组织结构和性能的影响  

Effects of different mass ratios of tetrabutyl titanate on the microstructure and properties of GO-TiO_(2) composite materials

作　　者：于凯伦 王博 韩庆 陈建设 李斌川 魏世丞 YU Kai-lun;WANG Bo;HAN Qing;CHEN Jian-she;LI Bin-chuan;WEI Shi-cheng(School of Metallurgy,Northeastern University,Shenyang 110891,China;National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《工程科学学报》2022年第8期1360-1367,共8页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51905543,51675533,51701238);国防科技卓越青年科学基金资助项目(2017-JCJQ-ZQ-001);中国博士后科学基金资助项目(2018M643857)。

摘　　要：以氧化石墨烯和钛酸四丁酯为原料,采用一步水热法制备氧化石墨烯/二氧化钛(GO-TiO_(2))复合材料,研究不同钛酸四丁酯含量对GO-TiO_(2)复合材料组织和性能的影响规律.通过扫描电镜(SEM)、X射线衍射(XRD)、红外光谱(IR)、拉曼光谱(RS)、紫外-可见分光光度计(UV-vis)、热重分析仪(TGA)等对复合材料的微观形貌、物相组成、结构、吸光性和热稳定性进行表征.研究结果表明,随着钛酸四丁酯含量的增加,有利于GO-TiO_(2)复合材料的均匀分散,提高了GO-TiO_(2)复合材料的吸光性和热稳定性,但钛酸四丁酯含量过高会使GO-TiO_(2)复合材料分散性、吸光性和热稳定性下降.当氧化石墨烯质量为320 mg、钛酸四丁酯含量为100 mL时,反应生成的复合材料表面TiO_(2)分散均匀,缺陷少,D峰与G峰的峰强比(ID/IG)值为0.91,氧化石墨烯和二氧化钛复合程度高,复合材料中的TiO_(2)吸收边缘红移至可见光范围内,并且在440~800 nm可见光范围内的吸收峰明显增强,防腐防污能力增强,复合材料在800℃热稳定性相比于氧化石墨烯提高了84.89%.Graphene oxide/titanium dioxide(GO–TiO_(2)) composites were prepared via a one-step hydrothermal synthesis method using graphene oxide and tetrabutyl titanate as raw materials. The effects of different mass ratios of tetrabutyl titanate on the microstructure and properties of the GO–TiO_(2)composites were studied. The microscopic morphology of these composites was observed through a scanning electron microscope, and the phase composition and structure were analyzed using X-ray diffraction, infrared spectroscopy, and Raman spectroscopy. The light absorption performance and thermal stability of the composites were analyzed via ultraviolet–visible spectroscopy and a thermal gravimetric analyzer. As the content of tetrabutyl titanate increases, the TiO_(2)generation increases;material surface area climbs up and then declines;surface defects decline and then climb up;absorption peak in the visible light range strengthens and then weakens;and degree of recombination climbs up and then weakens. When the content of tetrabutyl titanate exceeded 100 mL, the dispersibility of TiO_(2)in the GO–TiO_(2)composites became poor, thereby reducing the light absorption performance and thermal stability of the composites. When the GO was 320 mg and tetrabutyl titanate was 100 mL in the precursor solution,the obtained composite material exhibited superior surface properties,optical properties,and thermal stability.TiO_(2)was uniformly dispersed on the surface of the composite material.The composite material exhibited a high absorption intensity of visible light,high recombination,few surface defects,and an ID/IG ratio of 0.91.Characteristic peaks at 1573 and 1428 cm;were the strongest.The absorption edge of TiO_(2)in the composite was bathochromic shifted to the visible light range,and the absorption peak was significantly enhanced in the visible light range of 440–800 nm.The composite material exhibited good anticorrosion and antifouling abilities.The thermal stability of the composite was 84.89%higher than that of GO at 80

关 键 词：氧化石墨烯 钛酸四丁酯 二氧化钛 吸光性 热稳定性 

分 类 号：TB33[一般工业技术—材料科学与工程]