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Epitaxial‐Like Hydrothermal Growth of Planar Hematite Films for Water Splitting by Waste Remediation
Author(s) -
Wang Ke,
Yang Xiaogang,
Li Pinjiang,
Zhao Yuanhao,
Wang Xiaochao,
Zheng Zhi
Publication year - 2016
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201600073
Subject(s) - hematite , water splitting , hydrothermal circulation , epitaxy , materials science , oxalate , isoelectric point , environmental remediation , crystal growth , chemical engineering , electrode , nanotechnology , photocatalysis , inorganic chemistry , chemistry , contamination , catalysis , metallurgy , crystallography , layer (electronics) , ecology , engineering , biology , enzyme , biochemistry
The development of advanced photoelectrode materials for water splitting is as important as recycling to solve environmental problems. In this Communication, we report a facile hydrothermal epitaxial growth of hematite films from ferrioxalate solution, where the pH, isoelectric point and crystal nature of the substrates play key roles in the film growth. In a photoelectrochemical cell, the hematite photoanodes showed high activity to oxidize water, oxalate or phenol molecules, resulting in hydrogen generation on the counter electrode. This work shines a new light in the direction of environmental waste recycling.