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In situ Growth of Phase‐Controlled Nickel Sulfide Nanostructures on Reduced Graphene Oxide Nanosheets : A Improved Cost‐effective Catalyst for 4‐Nitrophenol Reduction
Author(s) -
Karthikeyan Rajan,
Thangaraju Dheivasigamani,
Prakash Natarajan,
Arivanandhan Mukannan,
Hayakawa Yasuhiro
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601519
Subject(s) - oleylamine , graphene , nickel sulfide , nickel , materials science , catalysis , sulfide , oxide , chemical engineering , inorganic chemistry , nanoparticle , nanotechnology , chemistry , organic chemistry , metallurgy , engineering
Reduced graphene oxide (rGO)‐functionalized nickel sulfide nanoparticles were synthesized using a temperature‐controlled injection method. Syntheses were carried out in single (oleylamine) and mixed (oleylamine, oleic acid, and octadecene) solvents. Phase‐controlled NiS, NiS 2 , or Ni 3 S 4 nanocrystals were decorated on rGO sheets through the single‐step temperature‐controlled injection processes. Problems with the synthesis of rGO/nickel sulfide yielding mixed phases were overcome by adjusting the solvent mixture and source concentrations. X‐ray diffraction and transmission electron microscopy were used to study the crystal structures and phases of nickel sulfide on the rGO sheets. The catalytic performances of rGO/nickel sulfide structures containing different nickel sulfide phases were analyzed by measuring the degradation rate of 4‐nitrophenol. Catalytic activity of as synthesized rGO/NiS, rGO/NiS 2 and rGO/Ni 3 S 4 were higher activity than pure NiS, among them rGO/NiS was showed better activity than those of rGO/NiS 2 and rGO/Ni 3 S 4 .