Photocatalytic C(sp3)-H and C(sp2)-H Carboxylation of Amines with CO2 Using a Sustainable Covalent Organic Framework/gC3N4 Composite DOI

Pekham Chakrabortty,

Anjan Kumar Das, Swarbhanu Ghosh

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(28), P. 12413 - 12428

Published: July 4, 2024

Carboxylation of amines is an important route to obtain amino acids. Herein, we have reported the synthesis and characterizations a new COF/gC3N4 composite which acted as heterogeneous photocatalyst for carboxylation unprotected indoles N-Boc-benzyl amines. We used SnO2 nanoparticles cocatalyst CO2 carbon source under visible light irradiation. This gave range carboxylated products both with N-Boc-benzylamines high yield. Control experiments optimum reaction conditions this photocatalytic carboxylation. Light dependency was confirmed by altering intensity light. Here, synthesized two different catalysts, TpBpy Tz COF, gC3N4 heterojunction showed excellent activity. The photocatalysts, COF/gC3N4, are recyclable reusable several cycles without significant loss in performance. drug compound Clopidogrel formation unit Tirofiban demonstrated these protocols.

Language: Английский

COFs‐Based Metal‐Free Heterojunctions for Solar‐to‐Chemical Energy Conversion DOI
Tianyu Zhou, Yunchao Ma, Hao Feng

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 17, 2024

Abstract Covalent organic frameworks (COFs) are a promising class of polymers with the merits robust framework, ultrahigh porosity, and molecularly precise backbones, which reveals great potential for solar‐to‐chemical energy conversion in context mitigating environmental crises. However, photochemical activities individual COFs not as desired, primarily due to their limited light absorption, insufficient dissociation photogenerated excitons readily recombined carriers. Recently, COFs‐based metal‐free heterojunctions synergistic effects provide feasible route boost photocatalytic activity more environmentally friendly cost‐competitive manners. Herein, it is first systematically overview advances from heterojunction types, heterointerfaces interactions, primary design mechanisms. Then, typical photocatalysts (e.g., g‐C 3 N 4 ‐COFs, carbon materials‐COFs, polymer semiconductor‐COFs, COFs‐COFs heterojunction) summarized. Finally, challenges long‐term outlooks future offered terms efficiency, yield, stability, cost reaction mechanisms, well standardized evaluation method activities. It anticipated that this review can deliver new insights into fundamental engineering conversion, further accelerate development area.

Language: Английский

Citations

16
Recent advances on covalent organic frameworks (COFs) as photocatalysts: different strategies for enhancing hydrogen generation DOI
Chang-Cheng Gu, Fenghua Xu,

Wei-Kang Zhu

et al.

Chemical Communications, Journal Year: 2023, Volume and Issue: 59(48), P. 7302 - 7320

Published: Jan. 1, 2023

COF-based materials with different linkages and strategies for photocatalytic hydrogen evolution.

Language: Английский

Citations

35
Tailoring of visible light driven photocatalytic activities of Bi2MoO6 flower-like microspheres via synergistic effect of doping and surface Plasmon resonance DOI
Qian Wu, Quan Zhang, Weiping Li

et al.

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 475, P. 146192 - 146192

Published: Sept. 20, 2023

Language: Английский

Citations

35
Design of ultrathin CoAl-LDHs/ZnIn2S4 with strong interfacial bonding and rich oxygen vacancies for highly efficient hydrogen evolution activity DOI

Zetian He,

Qian Che,

Daimei Chen

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 651, P. 138 - 148

Published: July 31, 2023

Language: Английский

Citations

25
Synergistic effect of graphitic-like carbon nitride and sulfur-based thiazole-linked organic polymer heterostructures for boosting the photocatalytic degradation of pharmaceuticals in water DOI Creative Commons
Raziyeh Zandipak, Nader Bahramifar, Morteza Torabi

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152843 - 152843

Published: June 5, 2024

A sulfur-based COF has been combined with graphitic carbon nitride (CN) in microwave-assisted synthesis to build a COF-CN heterostructure enhanced photocatalytic activity. The prepared were fully characterized, analyzing the textural (N2 isotherms), structural (XRD and FTIR), chemical (elemental analysis XPS), morphological (HR-STEM), optical (DRS-UV–Vis photoluminescence) electrochemical properties (EIS impedance, transient photocurrent, flat band potential). Different COF-to-CN ratios (5–25 % of COF, wt.) explored, defining proportion (20 %) that led optimum activity for oxidation organic contaminants emerging concern (CECs) due an separation photogenerated charges lower bandgap value, 2.55 vs. 2.35 eV. performance was further tested other CECs, demonstrating its benefits comparison bare CN. materials displayed acceptable reusability stability. mechanism activation highlights importance played by superoxide radicals holes.

Language: Английский

Citations

12
Light-Mediated Sustainable Conversion of Carbon Dioxide to Valuable Methanol by Highly Efficient Covalent Organic Framework g-C3N4 Composites as a Reusable Photocatalyst DOI
Mainak Sarkar,

Pekham Chakrabortty,

Manideepa Sengupta

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(13), P. 5573 - 5590

Published: March 25, 2024

A novel triazine-based structured two-dimensional (2D) covalent organic framework (COF), known as TRITER-1, has been prepared through the Schiff-base condensation reaction between terephthalaldehyde and 1,3,5-tris(4-aminophenyl)triazine. Additionally, g-C3N4 incorporated within imine-based frameworks to produce composite TRITER-1@g-C3N4, which a relatively small band gap of 2.0 eV. This composite, called synthesized effectively used toward light-driven formation methanol from most greenhouse gas CO2. highly crystalline polymeric material demonstrated an outstanding photocatalytic activity. The active photocatalyst TRITER-1@g-C3N4 successfully reduces CO2 into under ambient conditions in presence NiO nanoparticles cocatalyst atmospheric pressure. visible-light-accelerated metal-free reduction by this COF accomplished 15 W white LED light illumination, with maximum turnover number (TON = 172, μmol 22 600). By varying intensity, it was clear that failed take place absence LED. We proved sunlight can also TON around 73 allow for sustainable reactions. catalyst retains its catalytic function after being regenerated multiple times is effective selective.

Language: Английский

Citations

8
Constructing a CeFeO3/LaFeO3/ZnIn2S4 double Z-scheme heterojunction for photocatalytic atrazine degradation under visible light irradiation DOI

Yanan Feng,

Meng Wang, Qingqiang Meng

et al.

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 694, P. 134229 - 134229

Published: May 10, 2024

Language: Английский

Citations

8
Carbon-Dots-Modified Hierarchical ZnIn2S4/Ni–Al LDH Heterojunction with Boosted Charge Transfer for Visible-Light-Driven Photocatalytic H2 Evolution DOI

Xiuzheng Deng,

Dongxue Wu,

Jiawen Ding

et al.

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(24), P. 9702 - 9712

Published: June 7, 2023

The construction of a heterojunction structure is considered significant route to promote solar-driven H2 production. Herein, CDs/ZnIn2S4/Ni-Al LDHs (CDZNA) ternary was elaborately constructed via the in situ growth ZnIn2S4 on Ni-Al with incorporation carbon dots (CDs) cocatalyst, which used as highly efficient catalyst for photocatalytic generation. Characterizations indicated that 2D nanosheet homogeneously dispersed surface fabricated an intimate hierarchical architecture and provided high BET area (135.12 m2 g-1). In addition, unique embeddable-dispersed CDs electron mediators possessed numerous active sites promoted charge separation ZnIn2S4/Ni-Al (ZNA) binary catalyst. By coupling these two features, CDZNA exhibited considerable production rate 23.1 mmol g-1 h-1 under visible-light illumination, 16.4 1.4 times higher than those ZNA, respectively. A proposed mechanism over also discussed. This work provides promising strategy achieve solar energy conversion system.

Language: Английский

Citations

22
UiO-66(-NH2) crystal-decorated Cu7S4 snowflake-like nanoarchitectures with synergistic charge migration for enhanced photocatalytic H2 evolution and N2 fixation DOI
Ranjit Bariki,

Aditya Ranjan Pati,

Sibun Kumar Pradhan

et al.

Sustainable Energy & Fuels, Journal Year: 2023, Volume and Issue: 7(24), P. 5633 - 5647

Published: Jan. 1, 2023

The fabrication of template-free dendritic copper sulphide phase-coupled metal–organic framework (MOF) heterostructures is an innovative approach for boosting light harvesting property and efficacy towards the photoreduction atmospheric molecules.

Language: Английский

Citations

18
Bimetallic nitride NiMoN loaded on graphitic carbon nitride for plasmon-enhanced visible light-driven photocatalytic hydrogen evolution from water splitting DOI
Ikram Ullah, Sadia Habib, Xiaojie Lu

et al.

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(4), P. 912 - 918

Published: Jan. 1, 2024

Plasmonic CN-NiMoN heterojunctions were prepared to enhance H 2 evolution from water splitting under visible-light ( λ ≥ 420 nm). Under irradiation, the optimal heterojunction shows 5.4 times higher activity than that of g-C 3 N 4 .

Language: Английский

Citations

7