The effect of single atom substitution (O, S or Se) on photocatalytic hydrogen evolution for triazine-based conjugated porous polymers

Abstract

<p>The one-atom substitution (O, S, Se) strategy shows great importance in the design of D–A type organic porous conjugated polymers for photocatalytic hydrogen evolution.</p>

DFT calculations for single-atom confinement effects of noble metals on monolayer g-C3N4 for photocatalytic applications

“…Environmental pollution and the energy crisis caused by excessive use of fossil fuels are the two major problems that have seriously affected the sustainable development of human being in the world today. Catalytic technologies play a critical role in solving two above-mentioned problems, which have been extensively used in many elds, such as chemical industry, production, 1,2 clean energy technologies 3,4 and environmental treatment. 5,6 Traditional supported metal catalysts, especially noble metals, including ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), have excellent catalytic performance.…”

Donor‐Acceptor Conjugated Heptazine Polymers with Highly Efficient Photocatalytic Degradations towards Tetracyclines

“…The characteristic peak of O 1s showed the weakest photoelectron current intensity, which may be ascribed to the adsorption of H 2 O and O 2 on the catalyst surface. [7] The high-resolution C 1s spectrum of g-C 3 N 4 showed two signal peaks at 288.2 and 284.6 eV, which were identified as the carbon on the heptazine rings (N-C═N) and the graphitic carbons or the sp 2 -carbons on the benzene rings, respectively. Meanwhile, a strong signal peak at 284.6 eV was detected in the high-resolution C 1s spectra of HPBP, HPTP, and HPF, which was attributed to the carbons on the aromatic ring (C-C/C═C).…”

“…[6] Compared with the inorganic photocatalysts, organic photocatalysts have several advantages, for example, low synthesis cost, non-toxicity, environmentally friendliness, and no secondary pollution. [7] Conjugated polymers (CPs) show great potential in the fields of organic photocatalysis because of their low skeleton density, large specific surface area, permanent porosity, and excellent stability. [8,9] In DOI: 10.1002/marc.202100577 addition, the relationships between structures and properties can be controlled by the building blocks with specific functional groups in advance.…”

Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

“…Compared with P10 , introducing a benzothiadiazole unit into P9 effectively reduced the optical bandgap from 2.94 eV to the ideal value of 2.33 eV. They further probed the influence of substituting the S atom in the benzothiadiazole group with O or Se atoms on the optoelectronic and photocatalytic properties of the CTFs P11 and P12 ( Figure 2 ) [ 51 ]. Introducing an O atom boosted the ICT and electron–hole separation due to the higher electron negativity; but it lowered the LUMO level, which as a result, suppressed the PHP reaction.…”