Open AccessStudy on template-free preparation of porous g-C3N4 and its enhanced visible-light catalytic performance
Author(s) -
Chen Li,
Linkun Xie,
Ke Xiao,
Haonan Zhang,
Xiang Chai
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1167/1/012007
Subject(s) - photocatalysis , scanning electron microscope , carbon nitride , materials science , transmission electron microscopy , graphitic carbon nitride , adsorption , catalysis , nitride , chemical engineering , specific surface area , photoluminescence , porosity , carbon fibers , thiourea , nanotechnology , chemistry , organic chemistry , composite material , composite number , optoelectronics , layer (electronics) , engineering
Employing thiourea as precursor, the bulk graphitic carbon nitride (named SCN) was prepared via thermal polymerization strategy. The SCN was then stripped and treated by different concentrations of NaOH solution, and then porous carbon nitride SCN with loose structure was obtained and characterized by X-ray diffraction (XRD), N 2 adsorption, scanning electron microscope (SEM), transmission electron microscopy (TEM), photoluminescence (PL). Then catalytic performance of the obtained porous carbon nitride SCN samples was evaluated by degrading methyl blue solution (MB). The results show that the normal pressure alkaline treatment is an effective way to prepare porous carbon nitride. After being treated by NaOH solution of 0.3 mol/L, the specific surface area of SCN increased to three times than that of bulk SCN. The synergistic effect of adsorption and photocatalysis boosts the photocatalytic efficiency of SCN by 1.78 times compared with bulk SCN, and the first-order reaction rate constant K app is increased by 2.9 times.