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Highly Dispersed and Small‐Sized Nickel(II) Hydroxide Co‐Catalyst Prepared by Photodeposition for Hydrogen Production
Author(s) -
Zhang Feiyan,
Dong Yuming,
Jiang Pingping,
Wang Guangli,
Zhao Na,
Zhang Huizhen,
Li Dandan,
Lyu Jinze,
Wang Yan,
Li Ji,
Zhu Yongfa
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201901217
Subject(s) - photocatalysis , catalysis , hydrogen production , nickel , dispersion (optics) , noble metal , particle size , hydrogen , hydroxide , materials science , chemical engineering , composite number , particle (ecology) , inorganic chemistry , chemistry , metallurgy , composite material , organic chemistry , physics , oceanography , geology , optics , engineering
Abstract Photodeposition has been widely used as a mild and efficient synthetic method to deposit co‐catalysts. It is also worth studying how to synthesize non‐noble metal photocatalysts with uniform dispersion. Different synthetic conditions in photodeposition have a certain influence on particle size distribution and photocatalytic activity. Therefore, we designed experiments to prepare the inexpensive composite photocatalyst Ni(OH) 2 /g‐C 3 N 4 by photodeposition. The Ni(OH) 2 co‐catalysts disperse uniformly with particle sizes of about 10 nm. The photocatalytic hydrogen production rate of Ni(OH) 2 /g‐C 3 N 4 reached about 19 mmol g −1 h −1 , with the Ni(OH) 2 deposition amount about 1.57 %. During 16 h stability testing, the rate of hydrogen production did not decrease significantly. The composite catalyst also revealed a good hydrogen production performance under sunlight. The Ni(OH) 2 co‐catalyst enhanced the separation ability of photogenerated carriers, which was proved by surface photovoltage and fluorescence analysis.