An efficient strategy to boost photoelectrochemical water oxidation of g-C3N4 films modified with NiO as cocatalyst DOI Creative Commons
Lingling Bi, Jiahao Zhan, Wenhao Zhang

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 7, 2025

The successful synthesis of carbon nitride films plays a crucial role in photoelectrochemical (PEC) water oxidation reactions. However, significant technical challenge is that the contact between g-C3N4 layer and fluorine-doped tin oxide (FTO) substrate suboptimal, as well recombination photogenerated electrons holes grievous, directly affecting effective charge transport overall photocatalytic efficiency. Herein, we fabricated thin photoanode through simple chemical vapor deposition, NiO cocatalyst was modified on surface via electro-deposition followed by calcination, aiming at improving transfer carriers. As expected, effectively suppressed after introducing cocatalyst. Moreover, superior electrical conductivity reduces resistance allows to be rapid injected into electrolyte participate reaction. such, NiO-60s (the deposition time 60 s) exhibits higher photocurrent density much negative onset potential than g-C3N4. which great benefit designing based for PEC

Language: Английский

POM-incorporated ZnIn2S4 Z-scheme dual-functional photocatalysts for cooperative benzyl alcohol oxidation and H2 evolution in aqueous solution DOI

Fangshu Xing,

Renyou Zeng,

Chuchu Cheng

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 306, P. 121087 - 121087

Published: Jan. 7, 2022

Language: Английский

Citations

154
Bio‐Inspired Supramolecular Self‐Assembled Carbon Nitride Nanostructures for Photocatalytic Water Splitting DOI Creative Commons
Nithinraj Panangattu Dharmarajan, Devthade Vidyasagar, Jae‐Hun Yang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(2)

Published: Sept. 12, 2023

Abstract Fast production of hydrogen and oxygen in large amounts at an economic rate is the need hour to cater needs most awaited energy, a futuristic renewable energy solution. Production through simple water splitting via visible light photocatalytic approach using sunlight considered as one promising sustainable approaches for generating clean fuels. For this purpose, variety catalytic techniques novel catalysts have been investigated. Among these catalysts, carbon nitride presently deemed best candidates photocatalysis due its unique molecular structure adequate visible‐range bandgap. Its bandgap can be further engineered by structural morphological manipulation or doping/hybridization. numerous synthetic nitrides, supramolecular self‐assembly recently developed elegant bottom‐up strategies it bio‐inspired provides facile eco‐friendly route synthesize high surface area with superior features other semiconducting properties. The current review article broadly covers synthesis nanostructures their water‐splitting applications comprehensive outlook on future directions.

Language: Английский

Citations

84
In-situ formatting donor-acceptor polymer with giant dipole moment and ultrafast exciton separation DOI Creative Commons
Chang Cheng, Jiaguo Yu, Difa Xu

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 13, 2024

Abstract Donor-acceptor semiconducting polymers present countless opportunities for application in photocatalysis. Previous studies have showcased their advantages through direct bottom-up methods. Unfortunately, these approaches often involve harsh reaction conditions, overlooking the impact of uncontrolled polymerization degrees on Besides, mechanism behind separation electron-hole pairs (excitons) donor-acceptor remains elusive. This study presents a post-synthetic method involving light-induced transformation building blocks hyper-cross-linked from donor-carbon-donor to donor-carbon-acceptor states, resulting polymer with substantial intramolecular dipole moment. Thus, excitons are efficiently separated transformed polymer. The utility this strategy is exemplified by enhanced photocatalytic hydrogen peroxide synthesis. Encouragingly, our observations reveal formation charge transfer states using time-resolved techniques, confirming transient exciton behavior and relaxation. not only guides development highly efficient photocatalysts but also applies various fields, including organic solar cells, light-emitting diodes, sensors.

Language: Английский

Citations

67
Graphitic carbon nitride-based nanostructures as emergent catalysts for carbon monoxide (CO) oxidation DOI
Kamel Eid, Ahmed Gamal, Aboubakr M. Abdullah

et al.

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(4), P. 1276 - 1310

Published: Jan. 1, 2023

This is the first review that emphasizes engineering of carbon nitride-based catalysts for thermal, electrochemical, and photoelectrochemical CO oxidation reactions experimentally theoretically.

Language: Английский

Citations

66
Zinc Chloride-Doped g-C3N4 Microtubes for Enhanced Photocatalytic Degradation of Tetracycline Hydrochloride DOI

Xiaoyu Ye,

Yanli Qi, Ying Cheng

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Morphology regulation and element doping are effective means to improving the photocatalytic performance of graphite-phase carbon nitride (g-C3N4). In this article, using melamine zinc chloride as raw materials, a novel kind Zn/Cl-doped hollow microtubular g-C3N4 (Zn-HT-CN) by hydrothermal method was developed. The structure morphology Zn-HT-CN reference samples were characterized X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), photoelectron (XPS), etc. Zn/Cl narrowed bandgap width g-C3N4, well inhibiting recombination photogenerated holes. Compared with pure microtube, showed excellent catalytic for photodegradation tetracycline hydrochloride (TCH) under irradiation visible light. rate TCH reached 94.41% in 40 min, which about two times high that catalyzed microtube. Moreover, it also superior microtube doped other typical metal elements. addition, good tolerance environmental pH, efficiency material remained at 78.78% after five cycles.

Language: Английский

Citations

2
A physicochemical introspection of porous organic polymer photocatalysts for wastewater treatment DOI
Jeet Chakraborty, Ipsita Nath, Francis Verpoort

et al.

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(3), P. 1124 - 1138

Published: Jan. 1, 2022

A detailed physicochemical explanation for experimental observations is provided POPs as powerful photocatalysts organic transformations and wastewater decontamination.

Language: Английский

Citations

66
Nanoarchitecture Manipulation by Polycondensation on KCl Crystals toward Crystalline Lamellar Carbon Nitride for Efficient H2O2 Photoproduction DOI
Zhenchun Yang, Lina Li,

Shiqi Zeng

et al.

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(6), P. 8232 - 8240

Published: Feb. 6, 2023

A lamellar carbon nitride (CN) framework is one of the most promising materials for solar-driven hydrogen peroxide production. The low dielectric constant organic CN leads to severe recombination excitons, and photon-to-chemical conversion efficiency thus unsatisfactory. In this work, by polycondensation small molecules on KCl crystal surface, K+-incorporated crystalline (CNK) frameworks show significantly extended periodicity stacking layers in-plane orderly organized heptazine/triazine units. CNK exhibit a series favorable photophysical properties, such as enhanced photon absorption, negatively shifted LUMO potentials, attenuated emissive decay excitons. present remarkable performance in photocatalytic selective oxygen reduction reaction production, e.g., from NH4SCN surface could produce at rate 26.7 mmol h-1 g-1 with high apparent quantum yield 25.0%, which 23.5 times that its counterpart synthesized absence KCl. This method generally applicable all precursors synthesis.

Language: Английский

Citations

27
Enhanced photocatalytic activity of orientationally grown CQD/TiO2 thin film on FTO substrate DOI

G. Shilpa,

P. Mohan Kumar,

P.R. Deepthi

et al.

Ceramics International, Journal Year: 2023, Volume and Issue: 49(11), P. 19083 - 19090

Published: March 6, 2023

Language: Английский

Citations

23
Organocatalysis with carbon nitrides DOI Creative Commons
Sujanya Maria Ruban, Kavitha Ramadass, Gurwinder Singh

et al.

Science and Technology of Advanced Materials, Journal Year: 2023, Volume and Issue: 24(1)

Published: March 13, 2023

Carbon nitrides, a distinguished class of metal-free catalytic materials, have presented good potential for chemical transformations and are expected to become prominent materials organocatalysis. This is largely possible due their low cost, exceptional thermal stability, non-toxicity, ease functionalization, porosity development, etc. Especially, the carbon nitrides with increased nitrogen contents more versatile than bulk counterparts catalysis. These N-rich discussed in earlier parts review. Later, review highlights role such nitride various organic reactions including Knoevenagel condensation, oxidation, hydrogenation, esterification, transesterification, cycloaddition, hydrolysis. The recently emerging concepts nitride-based organocatalysis been given special attention. In each sections, structure-property relationship was related catalysis action. Relevant comparisons other also realize real value. perspective, challenges, future directions discussed. overall objective this provide up-to-date information on new developments that could see them rising as future.

Language: Английский

Citations

23
Photoreduction of Aqueous Protons Coupling with Alcohol Oxidation on a S‐Scheme Heterojunction Photocatalyst MnO/Carbon Nitride DOI Open Access

Xue-Lian Hu,

Yangsen Xu,

Shuang Tang

et al.

Small, Journal Year: 2023, Volume and Issue: 20(12)

Published: Nov. 6, 2023

Abstract Crystalline carbon nitride (CCN), derived from amorphous polymeric CN, is considered as a new generation of metal‐free photocatalyst because its high crystallinity. In order to further promote the photocatalytic performance CCN, p‐type MnO nanoparticles are in situ synthesized and merged with n‐type CCN through one‐pot process form p–n heterojunction. The formed interfacial electric field between semiconductors different work functions efficiently breaks coulomb interaction CCN. prepared catalysts exhibit drastically increased hydrogen evolution (PHE) activity integrated oxidation alkyl aryl alcohols under irradiation visible light. aqueous solution benzyl alcohol (BzOH), rate over MnO/CCN (39.58 µmol h −1 ) nearly 7 times 37 that pure (5.76 CN (1.06 ), respectively, combining BzOH benzaldehyde. This proposes an avenue for construction novel 2D material‐based S‐scheme heterojunction extends application solar energy conservation utilization.

Language: Английский

Citations

23