RGO-PEI-TiO2 纳米线复合催化剂的制备及性能研究
苏策,白玲玲,李思良,李冠斌,张红博,常开善
兰州理工大学石油化工学院,兰州730050
Preparation and characterization of RGO-PEI-TiO2 nanowire composite catalyst
Su Ce, Bai Lingling ,Li Siliang ,Li Guanbing ,Zhang Hongbo, Chang Kaishan
College of Petro-Chemical Engineering,Lanzhou University of Technology,Lanzhou 730050
摘要 采用改进的Hummers法制备氧化石墨,以硫酸钛为钛源采用水热法制备了还原氧化石墨烯(RGO)-聚乙烯亚胺(PEI)-二氧化钛(TiO2 )纳米线复合催化剂(RGO-PEI-TiO2 ),通过扫描电子显微镜(SEM)、透射电镜(TEM)、X射线光电子能谱(XPS)、紫外-可见分光光度计(UV-Vis)对RGO-PEI-TiO2 的形貌,结构和光催化活性进行了表征。研究结果表明:在RGO-PEI-TiO2 复合催化剂中TiO2 纳米线负载在石墨烯的表面,大部分的TiO2 纳米线生长的直径大小比较均匀,具有很好的分散性;在紫外光激发,降解5h条件下,RGO-PEI-TiO2 对甲基橙的降解率达到100%,PEI的加入很好的降低了石墨烯的团聚,有助于电子的传递,提高了电子转移到TiO2 的速率,抑制了TiO2 半导体光生电子与空穴的复合,增强了RGO-PEI-TiO2 对甲基橙的降解功能。
关键词:
石墨烯
二氧化钛
纳米线
水热法
Abstract: The modified hummers method was used to prepare graphite oxide,and the reduced graphene oxide (RGO)-polyethyleneimine (PEI)-titanium dioxide (TiO2 ) nanowire composite catalyst (RGO-PEI-TiO2 ) was prepared by hydrothermal method using titanium sulfate as the titanium source.The morphology,structure and photocatalytic activity of RGO-PEI-TiO2 were characterized by SEM,TEM,XPS and UV-Vis.The results shewed that TiO2 nanowires were supported on the surface of graphene in RGO-PEI-TiO2 composite.Most of TiO2 nanowires grew in a uniform diameter and had good dispersion.Under ultraviolet excitation and degradation time was 5h,the degradation rate of methyl orange by RGO-PEI-TiO2 was 100%.The addition of PEI can reduce the agglomeration of graphene,contributed to electron transfer,increased the rate of electron transfer to TiO2 ,and inhibited the rate.The recombination of photogenerated electrons and holes of TiO2 semiconductor enhanced the degradation of methyl orange.
Key words:
graphene
titanium dioxide
nanowire
hydrothermal method
出版日期: 2018-10-20
发布日期: 2018-11-06
期的出版日期: 2018-10-20
基金资助: 国家自然科学基金(21462025)
作者简介: 苏策(1972-),男,博士,主要从事有机合成与催化的研究。
引用本文:
苏策,白玲玲,李思良,李冠斌,张红博,常开善. RGO-PEI-TiO2 纳米线复合催化剂的制备及性能研究[J]. 化工新型材料, 2018, 46(10): 221-223.
Su Ce, Bai Lingling ,Li Siliang ,Li Guanbing ,Zhang Hongbo, Chang Kaishan. Preparation and characterization of RGO-PEI-TiO2 nanowire composite catalyst. New Chemical Materials, 2018, 46(10): 221-223.
链接本文:
http://www.hgxx.org/CN/
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http://www.hgxx.org/CN/Y2018/V46/I10/221
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