As a new kind of polymeric semiconductors, graphitic carbon nitride (g-C3N4) and its incompletely condensed precursors are stable up to 550 °C in air have shown promising photovoltaic applications. However, for practical applications, their efficiency, limited e.g. by band gap absorption, needs further improvement. Here we report "structural doping" strategy, which phosphorus heteroatoms were doped into g-C3N4 via sites polycondensation the mixture source (specifically from...

Covalently bonded carbon nitride materials (e.g., g-C(3)N(4)) have numerous potential applications ranging from semiconductors to fuel cells. But their solubility is poor, which makes characterization and processing difficult. Moreover, the chemistry of as-synthesized nitrides has been widely neglected. Here we report that some these handicaps might be overcome by a controllable reversible protonation. It was found protonation not only provides better dispersion exposes high surface area for...

Three-dimensional graphene architectures in the macroworld can principle maintain all extraordinary nanoscale properties of individual flakes. However, current 3D products suffer from poor electrical conductivity, low surface area and insufficient mechanical strength/elasticity; interconnected self-supported reproducible graphenes remain unavailable. Here we report a sugar-blowing approach based on polymeric predecessor to synthesize bubble network. The network consists mono- or few-layered...

We report a facile one-step chemical method to synthesize partially reduced TiO2 nanotube arrays (NTAs). The NaBH4 treatment introduces oxygen vacancies on the surface and interior of TiO2. Oxygen vacancy extends photocatalytic activity NTAs from UV visible light region, enhances electrical conductivity as well charge transportation. Surface serve carrier traps adsorption sites where transfer adsorbed species inhibits recombination, whereas bulk tend act e–h recombination occurs. optimally...

Abstract Carbon materials doped with transition metal and nitrogen are highly active, non-precious catalysts for the electrochemical conversion of molecular oxygen in fuel cells, air batteries, electrolytic processes. However, accurate measurement their intrinsic turn-over frequency active-site density based on centres bulk surface has remained difficult to date, which hampered a more rational catalyst design. Here we report successful quantification surface-based associated values mono-...

A [email protected]2 visible-light "dyade"-like structure, catalytically active over the whole spectrum, has been produced in a one-step low-temperature solvothermal process. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The publisher is responsible for content functionality any supporting information supplied Any queries (other...

By union of graphitic carbon nitride polymer with reduced graphene oxide (rGO, ≤1 wt%) via π–π stacking interaction, the band structure could be well modulated. As a result, significant increase photocurrent was observed (e.g., when biased at 0.4 V vs.Ag/AgCl, anodic became 300% higher after doping). Not merely interesting in itself, also used as general dopant for semiconductors band-structure engineering.

A strategy of reaction-environment modulation was employed to change the surface property a semiconductor photocatalyst enhance its photocatalytic performance. Surface alkalinization induced by high alkalinity solution environment significantly shifted energy band SrTiO(3) more negative level, supplying strong potential for H(2)O reduction and consequently promoting efficiency H(2) evolution. This mechanism is also applicable visible-light-sensitive La,Cr-codoped photocatalyst, which hence,...

Nitrider: A polymeric semiconductor is synthesized by a one-step process, using variety of block copolymers, nonionic surfactants, and even ionic liquids as soft templates. The pore size specific surface area are tunable via the template content processing conditions. Triton X-100 some selected give CN materials with accessible systems high relative nitrogen contents. Detailed facts importance to specialist readers published "Supporting Information". Such documents peer-reviewed, but not...

Graphite-phase polymeric carbon nitride (GPPCN) has emerged as a promising metal-free material toward optoelectronics and (photo)catalysis. However, the insolubility of GPPCN remains one biggest impediments its potential applications. Herein, we report that could be dissolved in concentrated sulfuric acid, first feasible solvent so far, due to synergistic protonation intercalation. The concentration was up 300 mg/mL, thousands time higher than previous reported dispersions. As result,...

Polymeric carbon nitride, which is cheap, amenable to mass preparation and chemical modification, highly stable against oxidation up 550 °C in air, has been exemplified be potentially promising as a photoactive material directly converting solar light into electricity. It would not only strengthen the emerging applications of kaleidoscopic nitride solids, but also contribute more open discussion photovoltaics.

Graphene quantum dots (GQDs) and carbon (C-dots) have various alluring properties potential applications, but they are often limited by unsatisfied optical performance such as low yield, ambiguous fluorescence emission mechanism, narrow wavelength. Herein, we report that bulk polymeric nitride could be utilized a layered precursor to prepare nanostructures nanorods, nanoleaves chemical tailoring. As doped materials, these not only intrinsically emitted UV lights also well inherited the...

The oxygen reduction reaction (ORR) is one of the important reactions not only in life processes but also artificial energy conversion systems, such as fuel cells and metal/air batteries. As non-precious ORR catalysts, N-doped carbon materials show an exciting activity, most them were universally synthesized by high-temperature pyrolysis or annealing up to 1100 °C past few decades, which makes structural manipulation catalysts extremely difficult. Here, we propose that active could,...

Self-doped SrTiO3−δ was prepared through a carbon-free one-step combustion method followed by series of heat treatments in Ar at temperatures ranging from 1200 to 1400 °C. X-Ray Photoelectron Spectroscopy (XPS), Electron Paramagnetic Resonance (EPR) and High-Resolution TEM confirm the presence Ti3+ samples with oxygen vacancy accommodated perovskite forming Ruddlesden–Popper crystallographic shears. The UV-vis spectra electronic structure calculations show that together induce an in-gap band...

As an emerging nitrogen-rich 2D carbon material, graphitic nitride (CN) has drawn much attention for applications ranging from photo-/electrocatalysts to biosensors. Interfacial modification of CN is fundamentally vital but still in its infancy and remains challenging due the low reactivity CN. Here we report that, conjunction with a π-π stacking interaction, bulk could be simultaneously exfoliated via facile mechanical grinding. The obtained nanosheets (m-CNNS) not only retained pristine...

Covalently bonded carbon nitride (CN) has stimulated extensive attention as a metal-free semiconductor. However, because of the complexity polymeric structures, acquisition critical roles each molecular constituent in CN for photocatalysis remains elusive. Herein, we clarify fundamental active units by synthesizing with more detailed structures. Enabled microwave synthesis, as-prepared consists distinguishable melem (M1) and its incomplete condensed form (M2). We disclose rather than...

This article reviews recent advances in templating of graphitic carbon nitride materials, with a particular focus on applications photocatalysis.

Abstract The global tobacco epidemic is still a devastating threat to public health. Toxic reactive oxygen species (ROS) in the cigarette smoke cannot be efficiently eliminated by currently available filters. resultant oxidative stress causes severe lung injury and further diseases. To tackle this challenge, herein, novel copper tannic acid coordination (CuTA) nanozyme reported as highly active thermostable ROS scavenger. CuTA exhibits intrinsic superoxide dismutase‐like activity,...

Responsive assembly of 2D materials is great interest for a range applications. In this work, interfacial functionalized carbon nitride (CN) nanofibers were synthesized by hydrolyzing bulk CN in sodium hydroxide solution. The reversible assemble and disassemble behavior the as-prepared was investigated using CO2 as trigger to form hydrogel network at first. Compared most widespread absorbent such active carbon, graphene previously reported supramolecular gel, proposed not only exhibited...

Natural selection over billions of years has developed highly effective in vivo signal transduction that is often governed by a series competitive multiple mechanisms. Several artificial pathways have inspired numerous biosensing systems, but most these are driven single mechanism. Herein we describe multiple-mechanism-driven electrochemiluminescent (ECL) biosensor utilizes catalytic and steric hindrance effects assembling hemin/G-quadruplex on carbon nitride nanosheets. Taking the detection...

Semiconducting polymeric carbon nitride (CN) has drawn wide attention ranging from photocatalysis to more recent biosensing owing unique defect-tolerated optoelectronic properties and being metal-free, cheap, highly stable. However, at the core of electrical-optical interconversion, preparation CN photoelectrode is still challenging. Now, growth on electrodes achieved simply by microwave-assisted condensation in seconds. The ultrafast heating not only addressed thermodynamic contradiction...

Abstract Artificial photocatalysis offers a clean approach for producing H 2 O . However, the poor selectivity and activity of production hamper traditional industrial applications emerging photodynamic therapy (PDT)/chemodynamic (CDT). Herein, we report C 5 N photocatalyst with conjugated C=N linkage selective efficient non‐sacrificial in both normoxic hypoxic systems. The strengthened delocalization π‐electrons by linkers downshifted band position, thermodynamically eliminating side...