Graphitic carbon nitride (g-CN) is an emerging metal-free photocatalyst for solar energy conversion via water splitting and CO2 fixation. Herein, we used preheated melamine as a starting material in combination with the salt melt method to synthesize crystalline tri-s-triazine-based g-CN. The as-obtained sample exhibited high stability photocatalytic activity toward hydrogen oxygen production from splitting. In addition, by adding phosphate mimic natural photosynthetic environment, apparent...

Two-dimensional-layered heterojunctions have attracted extensive interest recently due to their exciting behaviours in electronic/optoelectronic devices as well solar energy conversion systems. However, layered heterojunction materials, especially those made by stacking different monolayers together strong chemical bonds rather than weak van der Waal interactions, are still challenging fabricate. Here the monolayer Bi2WO6 with a sandwich substructure of [BiO](+)-[WO4](2-)-[BiO](+) is...

Polymeric carbon nitride (PCN), in either triazine or heptazine form, has been regarded as a promising metal-free, environmentally benign, and sustainable photocatalyst for solar hydrogen production. However, PCN most cases only exhibits moderate activity owing to its inherent properties, such rapid charge carrier recombination. Herein we present triazine-heptazine copolymer synthesized by simple post-calcination of eutectic salts, that is, NaCl/KCl, modulate the polymerization process...

Ti-substituted NH2-Uio-66(Zr/Ti) prepared by using a post-synthetic exchange (PSE) method showed enhanced photocatalytic performance for both CO2 reduction and hydrogen evolution under visible light. Density functional theory (DFT) calculations electron spin resonance (ESR) results reveal that the introduced Ti substituent acts as mediator to facilitate transfer, which in performance.

Exciton binding energy has been regarded as a crucial parameter for mediating charge separation in polymeric photocatalysts. Minimizing the exciton of polymers can increase yield charge-carrier generation and thus improve photocatalytic activities, but realization this approach remains great challenge. Herein, series linear donor-acceptor conjugated developed to minimize by modulating charge-transfer pathway. The results reveal that reduced loss state facilitate electron transfer from donor...

In semiconductor-mediated photocatalysis, the optical property of semiconductors is a key parameter and closely related to conversion efficiency solar energy. However, endeavors in achieving wide spectral response are still limited impurity incorporation or using other assistants. Here, we report on structure-distortion-induced extension absorption conjugated polymer without relying any extra species, by taking typical example two-dimensional graphitic carbon nitride (g-C3N4) nanosheets....

The combination of lone-pair effects on Pb(2+) cations and the smaller electronegativity I(-) anions into pentaborate framework generates a phase-matchable material, Pb(2)B(5)O(9)I, with largest powder SHG response among borates, about 13.5 times that KDP (KH(2)PO(4)), transparency over near-UV to middle-IR region. DFT calculations electronic structure cutoff-energy-dependent coefficients confirm these origins.

Conjugated polymers (CPs) are emerging and appealing light harvesters for photocatalytic water splitting owing to their adjustable band gap facile processing. Herein, we report an advanced mild synthesis of three conjugated triazine-based (CTPs) with different chain lengths by increasing the quantity electron-donating benzyl units in backbone. Varying length CTPs modulates electronic, optical, redox properties, resulting enhanced performance oxygen evolution, which is more challenging...

Abstract To enhance the performance of semiconductor photocatalysts, cocatalysts are used to accelerate surface reactions. Herein, ultrasmall molybdenum–oxygen (MoO x ) clusters developed as a novel non‐noble cocatalyst, which significantly promotes photocatalytic hydrogen generation rate CdS nanowires (NWs). As indicated by extended X‐ray absorption fine structure analysis, direct bonds formed between NWs and MoO clusters, guarantee migration photo‐generated charge carriers. Moreover,...

Abstract M‐doped NH 2 ‐MIL‐125(Ti) (M=Pt and Au) were prepared by using the wetness impregnation method followed a treatment with H flow. The resultant samples characterized powder X‐ray diffraction (XRD), photoelectron spectroscopy (XPS), absorption fine structure (XAFS) analyses, N ‐sorption BET surface area, UV/Vis diffuse reflectance (DRS). photocatalytic reaction carried out in saturated CO triethanolamine (TEOA) as sacrificial agent under visible‐light irradiations showed that noble...

In excitonic solar cells (XSC), power conversion efficiency (PCE) depends critically on the interface band alignment between donor and acceptor materials. Graphene or silicene is not suitable for materials due to their semimetallic features (zero gaps); it therefore highly desired open an energy gap in graphene extend application optoelectronic devices, especially photovoltaics. this paper, based global particle-swarm optimization algorithm density functional theory methods, we predict a...

A series of zirconium polyphenolate-decorated-(metallo)porphyrin metal-organic frameworks (MOFs), ZrPP-n (n = 1, 2), featuring infinite ZrIV -oxo chains linked via polyphenolate groups on four peripheries eclipse-arranged porphyrin macrocycles, are successfully constructed through a top-down process from simulation to synthesis. These the unusual examples Zr-MOFs (or MOFs in general) based phenolic porphyrins, instead commonly known carboxylate-based types. Representative ZrPP-1 not only...

A cocatalyst is necessary for boosting the electron-hole separation efficiency and accelerating reaction kinetics of semiconductors. As a result, it critical importance to in situ track structural evolution during photocatalytic process, but remains very challenging. Here, atomically dispersed Ru atoms are decorated over multi-edged TiO2 spheres hydrogen evolution. Experimental results not only demonstrate that photogenerated electrons can be effectively transferred isolated also imply...

In this work, we apply a carbon nitride semiconductor with crystalline poly(triazine imide) (PTI) frameworks to photocatalytic overall water splitting.

Abstract Charge generation and separation are regarded as the major constraints limiting photocatalytic activity of polymeric photocatalysts. Herein, two new linear polyarylether‐based polymers (PAE–CPs) with distinct linking patterns between their donor acceptor motifs were tailor‐made to investigate influence different on charge process. Theoretical experimental results revealed that compared traditional single‐stranded linker, double‐stranded pattern strengthens donor–acceptor...

Covalent triazine-based frameworks (CTFs) are typically produced by the salt-melt polycondensation of aromatic nitriles in presence ZnCl2 . In this reaction, molten salt acts as both a solvent and Lewis acid catalyst. However, when cyclotrimerization takes place at temperatures above 300 °C, undesired carbonization occurs. study, an ionothermal synthesis method for CTF-based photocatalysts was developed using ternary NaCl-KCl-ZnCl2 eutectic (ES) mixture with melting point approximately 200...

Pursuing effective and generalized strategies for modulating the electronic structures of atomically dispersed nanozymes with remarkable catalytic performance is exceptionally attractive yet challenging. Herein, we developed a facile "formamide condensation carbonization" strategy to fabricate library single-atom (M1-NC; 6 types) dual-atom (M1/M2-NC; 13 metal-nitrogen-carbon (M = Fe, Co, Ni, Mn, Ru, Cu) reveal peroxidase- (POD-) like activities. The Fe1Co1-NC nanozyme Fe1-N4/Co1-N4...

Piezo-photocatalysis is a frontier technology for converting mechanical and solar energies into crucial chemical substances has emerged as promising sustainable strategy N

Multivalency iodine (I7+/I-) doped TiO2 were prepared via a combination of deposition−precipitation process and hydrothermal treatment. The as-prepared samples characterized by X-ray diffraction, transmission electron microscopy, Brunauer−Emmett−Teller surface area, UV−vis diffuse reflectance spectra, photoelectron spectroscopy, photovoltage electric-field-induced spectroscopy. electronic structure calculations based on the density functional theory revealed that upon doping, new states...