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Facile Synthesis of Porous Flower‐Like Co 3 O 4 ‐SiO 2 Composite for Catalytic Decoloration of Rhodamine B
Author(s) -
Meng Qingnan,
Wang Kai,
Tang Yufei,
Zhao Kang,
Zhang Guojun,
Han Zhenhua,
Yang Jun
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.201701884
Subject(s) - rhodamine b , calcination , x ray photoelectron spectroscopy , scanning electron microscope , catalysis , transmission electron microscopy , materials science , chemical engineering , composite number , adsorption , desorption , nuclear chemistry , nanotechnology , chemistry , photocatalysis , composite material , organic chemistry , engineering
Flower‐like Co 3 O 4 ‐SiO 2 composite (FCSC) is prepared by a facile one‐pot two‐step solution synthesis followed by calcination. In our method, metalic Co nanoparticles are used as the starting material, which are oxidized to the flower‐like Co(OH) 2 structure in the early stage of silica coating. The silica shell effectively keeps the 3D flower‐like structure from collapsing and also prevents the Co 3 O 4 becoming large during calcination. The as‐prepared FCSC is investigated by scanning electron microscope (SEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM) and N 2 adsorption/desorption measurements and a plausible formation mechanism is proposed. The final product has a large sepcific surface area of 347.6 m 2 ⋅ g −1 which shows superior catalytic performance in catalytic decoloration of rhodamine B with peroxymonosulfate (PMS), offering great promise for water treatment.