调节氧化石墨烯的还原程度用于氧化锌形貌调控
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- 英文论文题名：Tailoring reduction degree of Graphene Oxide for ZnO Morphology Regulation
- 论文作者：李长霞 ; 黄如丹
- 英文论文作者：Changxia Li ; Rudan Huang ; School of Chemistry ; Beijing Institute of Technology
- 年：2016
- 作者机构：北京理工大学化学学院;
- 论文关键词：氧化锌 ; 石墨烯 ; 还原程度 ; 形貌调控
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：TQ132.41
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：285k
- 原文格式：D
- 会议级别：全国
摘要
石墨烯可以作为模板生长氧化锌~[1,2]。我们发现在同样的生长条件下,氧化锌的形貌和氧化石墨烯的还原程度有紧密关系。当石墨烯的C/O原子比<8时,氧化锌倾向于在石墨烯膜上以纳米片的形式组装成绣球花样的微米结构,而且随着C/O比增大,氧化锌微球的直径逐渐减小。当C/O比>9时,绣球花样的氧化锌消失,随之出现了棒状结构。同样地,C/O比越大,氧化锌棒的直径越小。当8氧化锌/石墨烯复合结构,在紫外光照射下展现了可逆的表面亲疏水性,在可见光照射下展现了提高的光电流响应,因此它在未来的光电子设备中具有潜在的应用。
There are considerable differences in the morphologies of ZnO grown on the graphene films with different reduction degree. When C/O atom ratio is smaller than 8, ZnO tends to self-assemble into hydrangea-like microstructure in the form of nanosheets on the graphene films and the size of ZnO microspheres decrease gradually with the increase of C/O ratio. In the case of C/O ratio of larger than 9, the sphere-shaped flowers disappear, followed by clavate structures. The larger C/O ratio is, the less the diameter of rods is. When C/O ratio is in the range of 8-9, there is a hybridized state composed of both of nanosheets and rods, where the rods are in the range of microns. What's more, hydrangea-like Zn O/graphene structure shows a good reversibility of the surface wettability irradiated with UV light and enhanced sensitivity to visible light irradiation, which will open up new opportunities for future optoelectronic devices.
There are considerable differences in the morphologies of ZnO grown on the graphene films with different reduction degree. When C/O atom ratio is smaller than 8, ZnO tends to self-assemble into hydrangea-like microstructure in the form of nanosheets on the graphene films and the size of ZnO microspheres decrease gradually with the increase of C/O ratio. In the case of C/O ratio of larger than 9, the sphere-shaped flowers disappear, followed by clavate structures. The larger C/O ratio is, the less the diameter of rods is. When C/O ratio is in the range of 8-9, there is a hybridized state composed of both of nanosheets and rods, where the rods are in the range of microns. What's more, hydrangea-like Zn O/graphene structure shows a good reversibility of the surface wettability irradiated with UV light and enhanced sensitivity to visible light irradiation, which will open up new opportunities for future optoelectronic devices.
引文
[1]Biroju,R.K.;Tilak,N.;Rajender,G.;Dhara,S.;Giri,P.K.Nanotechnology 2015,26:145601
[2]Liu,J.W.;Lu,R.T.;Xu,G.W.;Wu,J.;Thapa,P.;Moore,D.Adv.Funct.Mater.2013,23:4941.
[2]Liu,J.W.;Lu,R.T.;Xu,G.W.;Wu,J.;Thapa,P.;Moore,D.Adv.Funct.Mater.2013,23:4941.