Effect of morphology on the photocatalytic activity of g-C3N4 photocatalysts under visible-light irradiation

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

“…Then, under the irradiation by visible light, the electrons at valence band (+1.6 eV vs. NHE) of g-C 3 N 4 can be migrated to conduction band (-1.1 eV vs. NHE) [ 63 ] and photogenerated electrons and holes are consequently produced. A larger surface area of g-C 3 N 4 can provide more active sites during the photocatalytic reactions, in turn, produce more photogenerated electrons and holes [ 64 ]. Furthermore, the increased surface area can lead to less recombination of photogenerated carriers [ 65 ].…”

Enhanced photo-induced charge separation and solar-driven photocatalytic activity of g-C3N4 decorated by SO42−

“…Moreover, the results indicate that a very large amount of the SO 4 2 À is harmful for the activity possibly due to the coverage of g-C 3 N 4 active sites by the SO 4 2 À [13], thus activity of 7.7% is worse than that of 6.0%. This study demonstrates that sulfating can enhance photocatalytic activity of g-C 3 N 4 , the results in our case are the same as the results reported by Yan and coworkers [31].…”

“…Furthermore, the conduction band of g-C 3 N 4 is extremely negative, so photo-generated electrons have high reduction ability [6]. Continuous efforts have been taken to investigate g-C 3 N 4 in the potential applications in purification of contaminated water, H 2 evolution, CO 2 reduction, solar fuels and so on [7][8][9][10][11][12][13][14][15][16][17][18]. However, there are some inherent drawbacks which restrict the application of g-C 3 N 4 in photocatalysis, such as the high recombination rate of photo-generated electron-hole pairs and weak oxidative ability of photogenerated hole [19][20][21].…”

Efficient visible-light photocatalytic oxidation of gaseous NO with graphitic carbon nitride (g–C3N4) activated by the alkaline hydrothermal treatment and mechanism analysis

“…5a Moreover, plots of (αhν) 1/2 versus hν are drawn in Fig. 5b [42]. Herein, χis the absolute electronegativity of the g- …”

“…And it has been reported that small grain size and high crystallinity enhance the photocatalytic activity because of increased restive sites as well as the promoted electron-hole separation efficiency [41]. Moreover, (002) peaks in treated samples exhibit a slight shift to higher angles, indicating a reduction of the average interlayer distance [42]. Additionally, lower peaks at 2θ = 13.1°, indexed to (100) plane corresponding to the in-plane structural packing motif [43], are not observed remarkable variations.…”