Open AccessOne‐step fabrication and high photocatalytic activity of porous graphitic carbon nitride synthesised via direct polymerisation of dicyandiamide without templates
Author(s) -
Yu Qingbo,
Li Xianhua,
Zhang Mingxu
Publication year - 2014
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0651
Subject(s) - photocatalysis , graphitic carbon nitride , materials science , calcination , visible spectrum , porosity , scanning electron microscope , chemical engineering , photocurrent , carbon nitride , photochemistry , catalysis , chemistry , organic chemistry , composite material , optoelectronics , engineering
Porous graphitic carbon nitride (g‐C 3 N 4 ) has been synthesised by means of one‐step calcinations of dicyandiamide for efficient photocatalysis under visible light irradiation (λ > 400 nm). Scanning electron microscopy images demonstrate that the as‐prepared photocatalyst calcined at 650°C is a porous structure. The UV–vis diffuse reflectance spectra show that the optical absorption for the porous g‐C 3 N 4 is more intensive than for common g‐C 3 N 4 calcined at 550°C. The enhanced generation of the photocurrent under visible light irradiation (λ > 400 nm) is observed by using the porous g‐C 3 N 4 . The results of the photocatalytic experiments under visible light irradiation reveal that the photocatalytic degradation of methylene blue using the porous g‐C 3 N 4 is higher than common g‐C 3 N 4 , showing the advantage of the structure for efficient photocatalysis. The presence of the calcinations temperature is presumed to play a key role in adjusting the textural properties.