Research articles
ScienceAsia 48 (2022):ID 202-208 |doi:
10.2306/scienceasia1513-1874.2022.046
In-situ synthesis of sodium doped g-C3N4 by high temperature
copolymerization and photocatalytic performance
Ni Baia, Jiahui Yina, Xiaoxia Huob, Yajun Maa, Dandan Guoa, Aimin Wanga,*
ABSTRACT: Na+
-doped g-C3N4
(Na(x)-CN) was synthesized via a facile in-situ thermal polymerization with dicyandiamide and sodium chloride and compared with g-C3N4
treated with sodium chloride solution (CN/NaCl) and g-C3N4
combined with sodium chloride (CN@NaCl). The resultant catalysts were characterized by various analytical methods.
The results showed that Na+ was doped into the lattice gap of g-C3N4
by forming Na-N bond, which improved the
valence band energy level of the catalyst and enhanced the oxidizability of holes (h+
). In addition, the introduction
of Na+
inhibited the growth of g-C3N4
grains, increased the specific surface area of g-C3N4
and the adsorption of
dissolved oxygen and pollutants in water, which significantly improved the photocatalytic performance. The visible
light catalytic performance of the catalyst gradually improved with the increase of Na+
-doped content. The Na(0.1)-
CN (sodium loading was 1.36%) showed the best photocatalytic performance, and the degradation rate was about 10
times that of g-C3N4
. The degradation rate of MB reached 87% after 4 h of illumination.
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| a |
Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School Chemistry and Chemical Engineering,
Yulin University, Yulin 71900 China |
| b |
College of Chemistry and Chemical Engineering, Xi?an University of Science and Technology, Xi?an 710054 China |
* Corresponding author, E-mail: aimin_wang@yulinu.edu.cn
Received 1 Jun 2021, Accepted 1 Dec 2021
|
