Covalent-bond-enhanced photocatalytic hydrogen evolution of C3N4/CoPx with L-cysteine molecule as bridging ligands

Construction of Interfacial P–Ni Bonding for Enhanced Hydrogen Evolution Performance of P-Doped C3N4/Ni Photocatalysts

“…The produced H 2 amount was estimated by gas chromatography (GC7920-TA, TCD, 5 Å molecular sieve column, and Ar as carrier gas) with a thermal conductivity detector. The apparent quantum efficiency (AQE) of photocatalysts was measured under 420 nm monochromatic irradiation of 9.0 mW cm –2 and calculated using eq where M , N A , h , c , S , P , t , and λ are the amount of H 2 molecules, Avogadro constant, Planck constant, speed of light, irradiation area, light intensity, photoreaction time, and wavelength of the monochromatic light, respectively.…”

“…The high-quality metal/semiconductor interface has been realized for the high hot electron injection rate, but the harsh experimental conditions indicate that it is still difficult to efficiently eliminate interfacial defects. The construction of chemical bonding can simply and efficiently passivate interface defect states to inhibit the interfacial carrier recombination. , Our recent work indicated that the realization of covalent bonding between CoP x and C 3 N 4 with l -cysteine bridging ligands could enhance their photocatalytic performance by 1 order of magnitude . The introduction of heteroatoms or buffer layers can also act as bridging ligands for the interface optimization. ,,, Based on the above consideration, strong-affinity P element is consciously introduced into C 3 N 4 to act as anchoring sites for photodeposited Ni nanoparticles (NPs), and the formed chemical bonding between C 3 N 4 and Ni NPs is helpful to the enhanced photocatalytic performance.…”

“…24,25 Our recent work indicated that the realization of covalent bonding between CoP x and C 3 N 4 with L-cysteine bridging ligands could enhance their photocatalytic performance by 1 order of magnitude. 26 The introduction of heteroatoms or buffer layers can also act as bridging ligands for the interface optimization. 21,22,27,28 Based on the above consideration, strong-affinity P element is consciously introduced into C 3 N 4 to act as anchoring sites for photodeposited Ni nanoparticles (NPs), and the formed chemical bonding between C 3 N 4 and Ni NPs is helpful to the enhanced photocatalytic performance.…”

Synergetic Effects of Random Copolymerization/Backbone Fluorination and Heterojunction of Terpolymer/g‐C3N4 Enhance Photocatalytic Hydrogen Evolution

“…[ 5 ] To exploit the visible light regime and near‐infrared region, fabricating g‐C 3 N 4 ‐based hybrids is proposed to be an effective way, which can enhance visible light absorption and facilitate charge separation and transfer, by introducing photosensitizer molecules and organic conjugated polymers in g‐C 3 N 4 . [ 17–19 ]…”

“…[5] To exploit the visible light regime and near-infrared region, fabricating g-C 3 N 4 -based hybrids is proposed to be an effective way, which can enhance visible light absorption and facilitate charge separation and transfer, by introducing photosensitizer molecules and organic conjugated polymers in g-C 3 N 4 . [17][18][19] Conjugated polymer semiconductor materials have attracted much attention in the photocatalytic field because of their potential advantages such as the flexible chemical structures and readily tunable electronic properties. [20,21] In particular, donor-acceptor (D-A)-type conjugated polymers have exhibited superior photocatalytic activity due to the intramolecular charge transfer (ICT) from D to A segments, which could not only promote the charge separation and transportation but also broaden the absorption spectrum range.…”