TY - JOUR
T1 - Facile fabrication of ordered mesoporous graphitic carbon nitride for RhB photocatalytic degradation
AU - Luo, Lei
AU - Zhang, Anfeng
AU - Janik, Michael J.
AU - Li, Keyan
AU - Song, Chunshan
AU - Guo, Xinwen
N1 - Funding Information:
This work was supported by the State Key Program of National Natural Science Foundation of China (grant nos. 21236008 , 21306018 ), and the Fundamental Research Funds for the Central Universities (Grant No. DUT16LK12 ).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/2/28
Y1 - 2017/2/28
N2 - Ordered mesoporous graphitic carbon nitrides were prepared by directly condensing the uniform mixtures of melamine and KIT-6. After removal of the KIT-6 sacrificial template, the carbon nitrides were characterized with TEM, N 2 physical adsorption, XRD, FT-IR, XPS, UV–vis and PL spectrometries, and tested for their RhB photocatalytic degradation activity. Together, these characterizations confirmed the as-prepared tunable mesoporous materials with enhanced charge separation efficiency and superior photocatalytic performance. Compared with a conventional bulk g-C 3 N 4 , ordered mesoporous g-C 3 N 4 exhibits a larger specific surface area of 279.3 m 2 /g and a pore size distribution about 4.0 nm and 13.0 nm. Meanwhile, the reduced bandgap energy of 2.77 eV and lower photogenerated electron-hole pair recombination frequency were evidenced by UV–Vis and PL spectra. The RhB photocatalytic degradation activity maximizes with a mass ratio of KIT-6/melamine of 80% (KCN80), and the kinetic constant reaches 0.0760 min −1 which is 16 times higher than that of the bulk sample. Reusability of KCN80 was demonstrated by a lack of evident deactivation after three consecutive reaction periods. The direct condensation of the KIT-6 and melamine mixture does not require pre-casting of the precursor into the pore system of the templates. Owing to its high product yield, improved S BET , reduced bandgap energy and limited charge recombination, the facile-prepared ordered mesoporous g-C 3 N 4 is a practical candidate for further modification.
AB - Ordered mesoporous graphitic carbon nitrides were prepared by directly condensing the uniform mixtures of melamine and KIT-6. After removal of the KIT-6 sacrificial template, the carbon nitrides were characterized with TEM, N 2 physical adsorption, XRD, FT-IR, XPS, UV–vis and PL spectrometries, and tested for their RhB photocatalytic degradation activity. Together, these characterizations confirmed the as-prepared tunable mesoporous materials with enhanced charge separation efficiency and superior photocatalytic performance. Compared with a conventional bulk g-C 3 N 4 , ordered mesoporous g-C 3 N 4 exhibits a larger specific surface area of 279.3 m 2 /g and a pore size distribution about 4.0 nm and 13.0 nm. Meanwhile, the reduced bandgap energy of 2.77 eV and lower photogenerated electron-hole pair recombination frequency were evidenced by UV–Vis and PL spectra. The RhB photocatalytic degradation activity maximizes with a mass ratio of KIT-6/melamine of 80% (KCN80), and the kinetic constant reaches 0.0760 min −1 which is 16 times higher than that of the bulk sample. Reusability of KCN80 was demonstrated by a lack of evident deactivation after three consecutive reaction periods. The direct condensation of the KIT-6 and melamine mixture does not require pre-casting of the precursor into the pore system of the templates. Owing to its high product yield, improved S BET , reduced bandgap energy and limited charge recombination, the facile-prepared ordered mesoporous g-C 3 N 4 is a practical candidate for further modification.
UR - http://www.scopus.com/inward/record.url?scp=84995804531&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84995804531&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2016.10.190
DO - 10.1016/j.apsusc.2016.10.190
M3 - Article
AN - SCOPUS:84995804531
SN - 0169-4332
VL - 396
SP - 78
EP - 84
JO - Applied Surface Science
JF - Applied Surface Science
ER -