Shearing bridge bonds in carbon nitride vesicles with enhanced hot carrier utilization for photocatalytic hydrogen production

Abstract

Although carbon nitride (g-C3N4) is a prevailing photoconversion material, its photocatalytic activity is constrained by fast carrier recombination and weak light absorption. Here, a precursor reforming strategy is developed to...

Synthesis of a visible-light-driven Ag2O–Co3O4 Z-scheme photocatalyst for enhanced photodegradation of a reactive yellow dye

“…These separated positive holes and electrons initiate a series of redox reactions. 65 Therefore, Ag 2 O–Co 3 O 4 exhibited higher catalytic performance than bare Co 3 O 4 . 54,66,67 The scavenging experiments were also performed for verification of the proposed mechanism.…”

“…The valence band and conduction band positions of Ag 2 O and Co 3 O 4 were estimated by the theory of electronegativity. 64 65 Therefore, Ag 2 O-Co 3 O 4 exhibited higher catalytic performance than bare Co 3 O 4 . 54,66,67 The scavenging experiments were also performed for verification of the proposed mechanism.…”

Study of photodegradation performance of Zn‐doped CeO2 nanoparticles for wastewater contaminants remediation under visible light

“…In coordination to Figure 7, a reduction was induced in the adsorption of AO7 dye subsequent to intensifying the applied pH of solution. Because of the anionic nature of AO7 dye and the positivity of NPs charges throughout acidic mixtures, it is sensible to presume that the catalyst surface and the dye have an adsorbing manner to one another within an acidic medium while displaying a repelling behavior throughout alkaline mixtures 18,43,44 . Figure 7 presents the outcomes of AO7 dye removal at the pH values of 5, 7, and 9 to be 71.4%, 83.4%, and 42.4%, respectively.…”

Oxygen vacancy and p–n heterojunction in a g-C3N4 nanosheet/CuFeO2 nanocomposite for enhanced photocatalytic N2 fixation to NH3 under ambient conditions

“…15 Despite these advantages, the relatively low efficiency of NH 3 production still stems from reasons that can be summarized as follows: (1) light absorption by photocatalysts is limited; (2) active sites on the surface of photocatalysts are insufficient; (3) the charge carriers are rapidly recombined and the efficient potentials of the photogenerated electron-hole pairs are lost; (4) absorption and activation of N 2 molecules on the surface of photocatalysts is very difficult. [16][17][18][19] Some semiconductors have proven their potential in the field of photocatalysis. Among them, graphite carbon nitride (g-C 3 N 4 ) nanosheets (denoted as CNns) have emerged in research as an attractive visible light-based photocatalyst due to their low price, easy synthesis, environmental friendliness, high surface area, suitable band structure, high chemical stability and the availability of raw materials.…”

“…15 Despite these advantages, the relatively low efficiency of NH 3 production still stems from reasons that can be summarized as follows: (1) light absorption by photocatalysts is limited; (2) active sites on the surface of photocatalysts are insufficient; (3) the charge carriers are rapidly recombined and the efficient potentials of the photogenerated electron-hole pairs are lost; (4) absorption and activation of N 2 molecules on the surface of photocatalysts is very difficult. 16–19…”