Chemical Cleavage of Layered Carbon Nitride with Enhanced Photoluminescent Performances and Photoconduction

Zhou, Zhixin; Shen, Yanfei; Liu, Ying; Liu, Anran; Liu, Songqin; Zhang, Yuanjian

doi:10.1021/acsnano.5b05924

Cited by 269 publications

(226 citation statements)

References 65 publications

Supporting

Mentioning

214

Contrasting

Unclassified

Order By: Relevance

“…The N 1s ( Figure 3d) signals for all samples can be deconvoluted into three peaks with binding energies of 398.7, 399.8 and 401.0 eV, which represent C-N=C (sp 2 hybridized nitrogen), tertiary nitrogen N-(C) 3 and C-N-H bond, respectively. 39,40 However, for O-g-C 3 N 4 monolayer sample, there is no clear XPS peak attributed to N-O bond at 402 eV. 41,42 The result indicated that in O-g-C 3 N 4 monolayer structure, there is no apparent N-O.…”

Section: Resultsmentioning

confidence: 99%

Oxygenated monolayer carbon nitride for excellent photocatalytic hydrogen evolution and external quantum efficiency

et al. 2016

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Oxygenated monolayer carbon nitride for excellent photocatalytic hydrogen evolution and external quantum efficiency

et al. 2016

View full text Add to dashboard Cite

“…It is reported that a variety of synthetic routes have been adopted to prepare CDs, and these approaches are generally classified into two categories – ‘‘top‐down’’ and ‘‘bottom‐up.” The former refers to the cutting of macroscopic carbon structures into CDs using physical or chemical methods, such as: bulk graphitic‐phase polymeric carbon nitride, graphite, and graphite oxide . As for the latter one, molecular precursors could be polymerized with each other to form dimer, oligomer and polymer via microwave synthesis, hydrothermal treatment, and so on.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Hydrothermal Synthesis of Nitrogen‐Doped Conjugated Carbonized Polymer Dots with 31% Efficient Red Emission for In Vivo Imaging

Liu

Zhang

et al. 2018

Small

366

251

View full text Add to dashboard Cite

Carbon dots with long-wavelength emissions, high quantum yield (QY) and good biocompatibility are highly desirable for biomedical applications. Herein, a green, facile hydrothermal synthesis of highly efficient red emissive nitrogen-doped carbonized polymer dots (CPDs) with optimal emission at around 630 nm are reported. The red emissive CPDs possess a variety of superior properties including excellent water dispersibility, good biocompatibility, narrow bandwidth emission, an excitation-independent emission, and high QY (10.83% (in water) and 31.54% (in ethanol)). Further studies prove that such strong red fluorescence is ascribed to the efficient conjugated aromatic π systems and hydrogen bonds of CPDs. And the fluorescence properties of CPDs can be regulated by adjusting the dosage of HNO before the reaction. Additionally, the as-prepared CPDs are successfully used as a fluorescent probe for bioimaging, both in vitro and in vivo. More importantly, biodistribution results demonstrate that most CPDs and their metabolites are not only excreted in urine but also excreted by hepatobiliary system in a rapid manner. Besides, the CPDs could easily cross the blood brain barrier, which may provide a valuable strategy for the theranostics of some brain diseases through real-time tracking.

show abstract

“…[50][51][52] Recently, we reported a general method to synthesize highly porous CN film from a supramolecular paste via a doctor-blade technique. [50][51][52] Recently, we reported a general method to synthesize highly porous CN film from a supramolecular paste via a doctor-blade technique.…”

mentioning

confidence: 99%

Carbon Nitride/Reduced Graphene Oxide Film with Enhanced Electron Diffusion Length: An Efficient Photo‐Electrochemical Cell for Hydrogen Generation

Peng

Volokh

Tzadikov

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

robust, and highly efficient semiconductors; the latter should have good conductivity, be able to transfer charges rapidly at the semiconductor/liquid electrolyte interface, display long-term stability, possess good light-harvesting properties, and have a suitable energy band position for the desired reaction. [6,7] Despite significant progress in this field, [3,[10][11][12][13][14][15][16][17] semiconductors that fulfill all these requirements rarely exist today, and the production of such semiconductors is still much sought after.Over the past few years, polymeric graphitic carbon nitride (CN) has attracted widespread attention due to its outstanding electronic properties, which have been exploited in various applications, including photo-and electrocatalysis, [18][19][20][21][22][23][24] heterogeneous catalysis, [25][26][27][28] CO 2 reduction, [29][30][31] water splitting, [32][33][34][35][36][37][38][39][40] light-emitting diodes, [41] photovoltaics, [42][43][44] and sensing. [45][46][47] Its unique and tunable optical, chemical, and catalytic properties, alongside its low price and remarkably high stability to oxidation, make it a very attractive material for PEC applications. [11,48,49] However, despite the great progress in utilizing CN materials in PECs, several factors still hinder the cell activity, such as poor electron-hole separation efficiency, short electron diffusion length owing to the poor electronic conductivity of CN materials, deficient hole transfer from the CN surface to solution, and low absorption coefficient. [25] We envision that the improvement of the electron diffusion length would result in significant enhancement of the electron and hole lifetimes and would increase their probability to reach the conductive substrate and the electrolyte, respectively, prior to their recombination. Moreover, a longer diffusion length allows the construction of a thicker absorber layer, thus increasing the surface density of accessible photoactive sites. One way to improve both charge separation and electron diffusion length is by compositing CN with conductive carbon materials, such as graphene and carbon nanotubes. [11,18,19] Upon illumination, excited electrons can be promptly injected into the conductive graphene, while the holes remain in the CN matrix. Consequently, the lifetime of the excitons is prolonged, enhancing their probability for further reaction. To date, various CN/graphene composites have been introduced, mainly as powders, and have demonstrated good photoactivity. [11,18,19] However, the poor dispersibility of CN/graphene composites in most solvents Polymeric carbon nitride (CN) has emerged as a promising semiconductor for energy-related applications. However, its utilization in photo-electrochemical cells is still very limited owing to poor electron-hole separation efficiency, short electron diffusion length, and low absorption coefficient. Here the synthesis of a highly porous carbon nitride/reduced graphene oxide (CN-rGO) film with good photo-electrochemical properties is repor...

show abstract

Chemical Cleavage of Layered Carbon Nitride with Enhanced Photoluminescent Performances and Photoconduction

Cited by 269 publications

References 65 publications

Oxygenated monolayer carbon nitride for excellent photocatalytic hydrogen evolution and external quantum efficiency

Oxygenated monolayer carbon nitride for excellent photocatalytic hydrogen evolution and external quantum efficiency

One‐Step Hydrothermal Synthesis of Nitrogen‐Doped Conjugated Carbonized Polymer Dots with 31% Efficient Red Emission for In Vivo Imaging

Carbon Nitride/Reduced Graphene Oxide Film with Enhanced Electron Diffusion Length: An Efficient Photo‐Electrochemical Cell for Hydrogen Generation

Contact Info

Product

Resources

About