Flatband &lambda;-Ti<sub>3</sub>O<sub>5</sub> towards extraordinary solar steam generation

doi:10.1038/s41586-023-06509-3

IMR OpenIR

	Flatband λ-Ti₃O₅ towards extraordinary solar steam generation
	Yang, Bo 1; Zhang, Zhiming 1; Liu, Peitao 2; Fu, Xiankai 1; Wang, Jiantao 2; Cao, Yu 2; Tang, Ruolan 1; Du, Xiran 1; Chen, Wanqi 1; Li, Song 1; Yan, Haile 1; Li, Zongbin 1; Zhao, Xiang 1; Qin, Gaowu 1; Chen, Xing-Qiu 2; Zuo, Liang 1
通讯作者	Zuo, Liang(lzuo@mail.neu.edu.cn)
	2023-09-13
发表期刊	NATURE
ISSN	0028-0836
页码	17
摘要	Solar steam interfacial evaporation represents a promising strategy for seawater desalination and wastewater purification owing to its environmentally friendly character(1-3). To improve the solar-to-steam generation, most previous efforts have focused on effectively harvesting solar energy over the full solar spectrum(4-7). However, the importance of tuning joint densities of states in enhancing solar absorption of photothermal materials is less emphasized. Here we propose a route to greatly elevate joint densities of states by introducing a flat-band electronic structure. Our study reveals that metallic lambda-Ti3O5 powders show a high solar absorptivity of 96.4% due to Ti-Ti dimer-induced flat bands around the Fermi level. By incorporating them into three-dimensional porous hydrogel-based evaporators with a conical cavity, an unprecedentedly high evaporation rate of roughly 6.09 kilograms per square metre per hour is achieved for 3.5 weight percent saline water under 1 sun of irradiation without salt precipitation. Fundamentally, the Ti-Ti dimers and U-shaped groove structure exposed on the lambda-Ti3O5 surface facilitate the dissociation of adsorbed water molecules and benefit the interfacial water evaporation in the form of small clusters. The present work highlights the crucial roles of Ti-Ti dimer-induced flat bands in enchaining solar absorption and peculiar U-shaped grooves in promoting water dissociation, offering insights into access to cost-effective solar-to-steam generation.
资助者	We are grateful to N. Wang and H. L. Qu at Analytical and Testing Center, Northeastern University, for the photoluminescence measurements and to Y. N. Jiang at Analytical and Testing Center, Institute of Metal Research, Chinese Academy of Sciences for the ; Program of Introducing Talents of Discipline Innovation
DOI	10.1038/s41586-023-06509-3
收录类别	SCI
语种	英语
资助项目	We are grateful to N. Wang and H. L. Qu at Analytical and Testing Center, Northeastern University, for the photoluminescence measurements and to Y. N. Jiang at Analytical and Testing Center, Institute of Metal Research, Chinese Academy of Sciences for the[BP0719037] ; Program of Introducing Talents of Discipline Innovation
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001078664900009
出版者	NATURE PORTFOLIO
引用统计	被引频次：238[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179483
专题	中国科学院金属研究所
通讯作者	Zuo, Liang
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Yang, Bo,Zhang, Zhiming,Liu, Peitao,et al. Flatband λ-Ti₃O₅ towards extraordinary solar steam generation[J]. NATURE,2023:17.
APA	Yang, Bo.,Zhang, Zhiming.,Liu, Peitao.,Fu, Xiankai.,Wang, Jiantao.,...&Zuo, Liang.(2023).Flatband λ-Ti₃O₅ towards extraordinary solar steam generation.NATURE,17.
MLA	Yang, Bo,et al."Flatband λ-Ti₃O₅ towards extraordinary solar steam generation".NATURE (2023):17.