期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 4, 页码 3922-3930出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b14036
关键词
2D nanomaterial; graphene oxide paper; templated synthesis; ultralight metal oxide; photoelectrochemical water splitting; hydrogen generation
资金
- DFF-FTP (the Danish Research Council for Technology and Product Science) [12-127447]
- Orsted-Marie-Curie [609405]
- Shanghai ChenGuang Program [15CG33]
- Shanghai Natural Science Foundation [16ZR1401500]
- Shanghai Sailing Program [16YF1400400]
- NSF of China [51603037]
- CSC PhD scholarship [201306170047]
Thanks to their versatile functionality, metal oxides (MOs) constitute one of the key family materials in a variety of current demands for sensor, catalysis, energy storage and conversion, optical electronics, and piezoelectric mechanics. Much effort has focused on engineering specific nanostructure and macroscopic morphology of MOs that aims to enhance their performances, but the design and controlled synthesis of ultrafine nanostructured MOs in a cost-effective and facile way remains a challenge. In this work, we have exploited the advantages of intrinsic structures of graphene oxide (GO) papers, serving as a sacrificial template, to design and synthesize two-dimensional (2D) layered and free-standing MO papers with ultrafine nanostructures. Phygicochemical characterizations showed that these MO materials are nanostructured, porous, flexible, and ultralight. The as-synthesized materials were tested for their potential application in photoelectrochemical (PEC) energy conversion. In terms of PEC water splitting, copper oxide papers were used as an example and exhibited excellent performances with an extremely high photocurrent-to-weight ratio of 3 A cm(-2) g(-1). We have also shown that the synthesis method is generally valid for many earth-abundant transition metals including copper, nickel, iron, cobalt, and manganese.
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