Photocharge Trapping in Two-Sheet Reduced Graphene Oxide-Ti0.87O2 Heterostructures and Their Photoreduction and Photomemory Applications

doi:10.1021/acsanm.9b01348

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	Photocharge Trapping in Two-Sheet Reduced Graphene Oxide-Ti0.87O2 Heterostructures and Their Photoreduction and Photomemory Applications
	Cai, Xingke 1,2; Yin, Lichang 3; Sakai, Nobuyuki 2; Liu, Dongqing 4; Teng, Changjiu 5; Ebina, Yasuo 2; Ma, Renzhi 2; Sasaki, Takayoshi 2
刊名	ACS APPLIED NANO MATERIALS
	2019-10-01
卷号	2 期号:10 页码:6378-6386
关键词	colloidal two-dimensional materials assembly heterostructures graphene oxide photoelectrical properties
ISSN号	2574-0970
DOI	10.1021/acsanm.9b01348
通讯作者	Cai, Xingke(cai.xingke@szu.edu.cn) ; Sasaki, Takayoshi(sasaki.takayoshi@nims.go.jp)
英文摘要	Two-sheet devices of different 2D materials fabricated from the mechanical transfer technique have been well studied to explore their genuine interactions, and many interesting properties have been found in them. However, the study of two-sheet heterostructures fabricated from colloidal 2D materials is rarely reported. In this work, a facile construction method of two-sheet assembly from colloidal 2D materials, i.e., reduced graphene oxide (rGO) and titania nanosheets (Ti0.87O20.52-) has been developed. Massive trapping of photocharges is observed in their two-sheet devices because of the unique band electronic structure of Ti0.87O20.52- nanosheets and its high surface charge density of similar to 10(15) cm(-2). We demonstrated that this photocharge trapping could be used for photoreduction of GO, which showed an over 10(8)-fold enhancement of conductivity for the film. When this phenomenon was used for photomemory application, the device showed the longest retention time (>10(5) s), a good photo/dark current ratio (similar to 10), and the largest data storage capacity (0.013 C), among all 2D material-based devices. The developed technique for the two-sheet structure of colloidal 2D materials may open a new avenue to study the properties of 2D materials.
资助项目	World Premier International Research Center Initiative on Materials Nano architectonics (WPI-MANA), MEXT, Japan ; CREST of the Japan Science and Technology Agency (JST) ; JSPS KAKENHI[15H02004] ; Guangdong University Young Talents Project[2018KQNCX218] ; NTUT-SZU Joint Research Program[2019001] ; Research Start-Up Fund of Shenzhen University[2019017] ; National Science Fund of China[51472249]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000507667200034
资助机构	World Premier International Research Center Initiative on Materials Nano architectonics (WPI-MANA), MEXT, Japan ; CREST of the Japan Science and Technology Agency (JST) ; JSPS KAKENHI ; Guangdong University Young Talents Project ; NTUT-SZU Joint Research Program ; Research Start-Up Fund of Shenzhen University ; National Science Fund of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136602]
专题	金属研究所_中国科学院金属研究所
通讯作者	Cai, Xingke; Sasaki, Takayoshi
作者单位	1.Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Guangdong, Peoples R China 2.Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton WPI MANA, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 4.Tsinghua Univ, Grad Sch Shenzhen, Shenzhen Key Lab Power Battery Safety Res, Shenzhen 518055, Peoples R China 5.Tsinghua Univ, Tsinghua Berkley Shenzhen Inst, Shenzhen Geim Graphene Ctr SGC, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Cai, Xingke,Yin, Lichang,Sakai, Nobuyuki,et al. Photocharge Trapping in Two-Sheet Reduced Graphene Oxide-Ti0.87O2 Heterostructures and Their Photoreduction and Photomemory Applications[J]. ACS APPLIED NANO MATERIALS,2019,2(10):6378-6386.
APA	Cai, Xingke.,Yin, Lichang.,Sakai, Nobuyuki.,Liu, Dongqing.,Teng, Changjiu.,...&Sasaki, Takayoshi.(2019).Photocharge Trapping in Two-Sheet Reduced Graphene Oxide-Ti0.87O2 Heterostructures and Their Photoreduction and Photomemory Applications.ACS APPLIED NANO MATERIALS,2(10),6378-6386.
MLA	Cai, Xingke,et al."Photocharge Trapping in Two-Sheet Reduced Graphene Oxide-Ti0.87O2 Heterostructures and Their Photoreduction and Photomemory Applications".ACS APPLIED NANO MATERIALS 2.10(2019):6378-6386.