Journal ArticleDOI
A Strategy of Enhancing the Photoactivity of g-C3N4 via Doping of Nonmetal Elements: A First-Principles Study
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In this article, an effective structural doping approach has been described to modify the photoelectrochemical properties of g-C3N4 by doping with nonmetal (sulfur or phosphorus) impurities.Abstract:
An effective structural doping approach has been described to modify the photoelectrochemical properties of g-C3N4 by doping with nonmetal (sulfur or phosphorus) impurities. Here, the substitutional and interstitial doped models of g-C3N4 systems were constructed with different doped sites, and then their dopant formation energies and electronic properties were performed to study the stability and visible-light photoactivity using first-principles density functional theory, respectively. Our results have identified that an S atom preferentially substitutes for the edge N atom of g-C3N4; however, a P atom preferentially situates the interstitial sites of in-planar of g-C3N4. Furthermore, it is demonstrated that the doping with nonmetal impurities reduces the energy gap to enhance the visible-light absorption of g-C3N4. The increased dispersion of the contour distribution of the HOMO and LUMO brought by doping facilitates the enhancement of the carrier mobility, while the noncoplanar HOMO and LUMO favor the...read more
Citations
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Facile Synthesis of Self-Assembled g-C3N4 with Abundant Nitrogen Defects for Photocatalytic Hydrogen Evolution
TL;DR: In this article, g-C3N4 with different morphologies is prepared using melamine as a precursor via self-assembly and calcination, and the resulting materials possess thinner lamellar structure and abundant nitrogen defects.
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Synthesis and characterization of novel Sm2O3/S-doped g-C3N4 nanocomposites with enhanced photocatalytic activities under visible light irradiation
TL;DR: In this article, a novel Sm2O3/S-doped g-C3N4 composites were synthesized with in situ method by simultaneous combining S doping in carbon nitride structure to produce CNS as well as hybridization of CNS with the Sm 2O3 semiconductor.
Journal ArticleDOI
Enhanced photocatalytic performance of boron and phosphorous co-doped graphitic carbon nitride nanosheets for removal of organic pollutants
TL;DR: In this article, the photocatalytic activity of graphitic carbon nitride is improved by co-doping of non-metal elements and morphologic regulation, and the obtained B, P codoped nanosheets (BPCNNS) have narrow bandgap (2.61) to utilize more visible light, and its ultrathin morphology promotes the separation and migration ability of photo-generated charges.
Journal ArticleDOI
Sodium-Doped C 3 N 4 /MOF Heterojunction Composites with Tunable Band Structures for Photocatalysis: Interplay between Light Harvesting and Electron Transfer
TL;DR: Benefiting from the interplay of the two critical factors between light harvesting ability and electron transfer efficiency, the optimized Na0.02 -C3 N4 /Pt@UiO-66 shows excellent photocatalytic H2 production, far surpassing its corresponding single counterparts.
Journal ArticleDOI
Photoresponsive polymeric carbon nitride-based materials: Design and application
Hui Wang,Xiaodong Zhang,Yi Xie +2 more
TL;DR: Recently, polymeric carbon nitride-based materials have attracted tremendous attention for their outstanding photoresponsive properties, promising their great potential in various photoexcitation-related applications such as photocatalysis, photoelectrochemistry, photoluminescence, etc as mentioned in this paper.
References
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Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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Semiempirical GGA-type density functional constructed with a long-range dispersion correction.
TL;DR: A new density functional of the generalized gradient approximation (GGA) type for general chemistry applications termed B97‐D is proposed, based on Becke's power‐series ansatz from 1997, and is explicitly parameterized by including damped atom‐pairwise dispersion corrections of the form C6 · R−6.
Journal ArticleDOI
Accurate and simple analytic representation of the electron-gas correlation energy
John P. Perdew,Yue Wang +1 more
TL;DR: A simple analytic representation of the correlation energy for a uniform electron gas, as a function of density parameter and relative spin polarization \ensuremath{\zeta}, which confirms the practical accuracy of the VWN and PZ representations and eliminates some minor problems.
Journal ArticleDOI
Ground state of the electron gas by a stochastic method
David M. Ceperley,Berni J. Alder +1 more
TL;DR: An exact stochastic simulation of the Schroedinger equation for charged Bosons and Fermions was used to calculate the correlation energies, to locate the transitions to their respective crystal phases at zero temperature within 10%, and to establish the stability at intermediate densities of a ferromagnetic fluid of electrons.
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A metal-free polymeric photocatalyst for hydrogen production from water under visible light
Xinchen Wang,Kazuhiko Maeda,Arne Thomas,Kazuhiro Takanabe,Gang Xin,Johan M. Carlsson,Kazunari Domen,Markus Antonietti +7 more
TL;DR: It is shown that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor.