Three-Dimensional Bicarbazole-Based Covalent Organic Frameworks as Efficient Yeager-Type Photocatalysts for H2O2 Generation in a Two-Phase System DOI
Aiguo Kong, Tao Yang, Hai Yan

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: June 5, 2025

Photocatalytic reduction of oxygen to hydrogen peroxide (H2O2) represents an attractive solar-to-chemical conversion pathway. Nevertheless, it remains a significant challenge achieve efficient H2O2 photosynthesis while simultaneously mitigating photocorrosion the catalysts owing presence superoxide radicals (•O2-) and accumulation photoexcited holes (h+). In present work, 1,2,3,4-tetrahydroisoquinoline (THIQ)-water two-phase system was developed high-efficiency durable production by suppressing •O2- intermediates rapidly consuming h+. The •O2--free direct two-electron reaction (2e- ORR) accomplished on special three-dimensional (3D) covalent organic framework (COF) metal-free photocatalysts consisting bicarbazole units (BCTB) as electron donors thiazole (BT) or triazine (TAPT) acceptors (COF-BCTB-BT COF-BCTB-TAPT). unique structures endow them with high rate in water phase ∼33.2 mmol gcat.-1 h-1 over COF-BCTB-BT. other phase, h+ also efficiently consumed semidehydrogenation THIQ (THIQ-SDR) 3,4-dihydroisoquinoline (DHIQ). Theoretical calculations revealed Yeager-type four-step 2e- ORR mechanism two COFs, lower energy barrier *O-O *O-OH for A THIQ-SDR DHIQ suggested. This work provides impressive strategy 3D bis-heterocyclic COF photocatalysts, effectively both formation accumulation.

Language: Английский

Synergistic Utilization of Photogenerated Electrons and Holes in Carbon Nitride Nanosheet Assembly for Enhanced Photocatalytic H2O2 Production DOI
Peipei Sun, Kang Zhong,

Xunhuai Huang

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 124998 - 124998

Published: Jan. 1, 2025

Language: Английский

Citations

8
A self-supported electrochemical immunosensor based on Cu2O/CuO@AuNPs heterostructures for sensitive and selective detection of ochratoxin A in food DOI
Yan Zhang, Minghui Han,

Danni Peng

et al.

Talanta, Journal Year: 2025, Volume and Issue: 287, P. 127657 - 127657

Published: Jan. 28, 2025

Language: Английский

Citations

2
Electro-Fenton process for wastewater treatment: From selective H2O2 generation to efficient •OH conversion DOI

Jialong Yin,

Heng Zhang, Meng-Fan Luo

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160709 - 160709

Published: Feb. 1, 2025

Language: Английский

Citations

2
Bringing Porous Framework Materials toward Photocatalytic H2O2 Production DOI

Chenhao Bao,

Lan Li, Xiaofei Wang

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Photocatalytic H2O2 production driven by renewable solar energy is a promising and sustainable approach, with porous framework materials such as metal-organic frameworks (MOFs), covalent organic (COFs), hydrogen-bonded (HOFs) emerging highly efficient catalysts. This Review first presents the current research state of in photosynthesis, focusing on progress across different mechanism insights gained through advanced techniques. Furthermore, systematic categorization material modifications aimed at enhancing photocatalytic efficiency provided, linking structural to improved performance. Key factors charge carrier separation transfer, reaction pathways, stability are comprehensively analyzed. Finally, challenges related stability, scalability, cost-effectiveness, discussed alongside opportunities for future advancements. aims provide into understanding optimizing scalable photosynthesis.

Language: Английский

Citations

1
N-Doped Porous Graphene Film Decorated with Palladium Nanoparticles for Enhanced Electrochemical Detection of Hydrogen Peroxide DOI Open Access
Yue Zhang,

Shi Zheng,

Jian Xiao

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(4), P. 298 - 298

Published: March 21, 2025

Graphene film has excellent electrical conductivity and flexibility, with which it can be used as a versatile substrate to load active species construct free-standing electrochemical sensors. In this work, Pd nanoparticle-decorated N-doped porous graphene (Pd/NPGF) was prepared by simple mild strategy enhance the behavior of film-based electrodes. The morphological structure surface component Pd/NPGF were characterized scanning electron microscopy, transmission Raman spectra X-ray photoelectron spectroscopy measurements. results revealed that contained abundant pores uniformly dispersed nanoparticles, could bring favorable response. Due synergetic effects pores, uniform nanoparticles substitutional doping framework N, novel electrode provides high site exposure, specific area fast electron/mass diffusion during reactions. Considering flexibility Pd/NPGF, we selected hydrogen peroxide, significant biomarker, model investigate its performance in neutral conditions. biosensor based on exhibited enhanced activity relative NPGF (PGF) different concentrations H2O2. displayed sensitivity (176.7 μA·mM−1·cm−2), large linear range from 5 μM 36.3 mM, low limit detection (LOD) 2.3 μM, stability short response time, all qualify for promising sensor H2O2 sensing.

Language: Английский

Citations

0
Au confined covalent organic frameworks nanoenzyme integrated with sodium alginate microsphere for portable colorimetric tannic acid detection DOI
Yan Zhang,

Haowen Qin,

Danni Peng

et al.

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 142556 - 142556

Published: March 1, 2025

Language: Английский

Citations

0
Pyridine Functionalized β-Ketoenamine-Linked Covalent Organic Framework Nanostructures for H2O2 Photosynthesis DOI
Qiaobo Liao, Ziyu Li,

Qiannan Sun

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Language: Английский

Citations

0
Ladder‐Like Built‐In Electric Field Enhances Self‐Assembly, Carrier Separation and Ultra‐Efficient Photocatalytic Oxygen Reduction DOI
Chen Li, Jiawei Song,

Peijie Ma

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Semiconductor heterojunctions can significantly enhance the separation of photogenerated charge carriers, among which Z‐type are more conducive to photocatalysis due their special transfer paths and strong oxidizing reducing properties. However, introducing efficient active sites has always been a significant challenge in improvement heterogeneous photocatalysts. Herein, through in‐depth analysis reaction mechanism structural characteristics, single atom catalysts ingeniously integrated using built‐in electric fields. For first time, suitable metal successfully designed under electronic structure at N‐terminal, utilizing low electronegativity non‐metallic element doping counteract local electron migration from heterojunctions. Ladder‐like field composed divergent parallel fields respectively, introduces new carrier path. AgPCN/BCN heterojunction reaches hydrogen peroxide (H 2 O ) yield 559.5 µM∙h −1 an apparent quantum efficiency 17.8% 2e − oxygen reduction reaction. Photoelectrochemical tests indicate importance 4e water oxidation as auxiliary This novel innovative photocatalyst brings approaches for photocatalysts improvement, insights into role photocatalytic mechanisms.

Language: Английский

Citations

0
Enzymatic Modulating Zinc-Air Battery-Based Self-Powered Sensor Coupling Photoactive Covalent Organic Framework for Organophosphorus Pesticide Detection DOI
Xinlun Cai, Qian Cui, Ting Bao

et al.

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: June 4, 2025

Self-powered electrochemical sensors (SPES) have gained significant attention with the characteristics of portability, high sensitivity, and no requirement an external power supply. Herein, a novel photoassisted zinc-air battery-based SPES (PZAB-SPES) was developed for organophosphorus pesticide detection based on photoactive covalent organic framework (COF) enzymatic modulation strategy. The in situ grown COF nanosheets not only acted as photocathode but also served nanocarriers silver nanoparticles (AgNPs) to improve photoelectric conversion efficiency surface plasmon resonance effect, which markedly increased open-circuit voltage up 1.469 V. Based aptamer-target recognition efficient separation magnetic beads, alkaline phosphatase (ALP)-catalyzed reaction triggered, resulting hydrolysis sodium thiophosphate (TP) generation hydrogen sulfide (H2S). generated H2S caused oxidation AgNPs form (Ag2S), decreased inhibited oxygen reduction reaction, leading decrease voltage. As proof concept, proposed PZAB-SPES exhibited good analytical performance acetamiprid ranging from 0.01 1000 ng/mL, low limit 1.1 pg/mL. This fascinating sensing platform provided method detection, holding extensive application prospects food safety environmental monitoring.

Language: Английский

Citations

0
Three-Dimensional Bicarbazole-Based Covalent Organic Frameworks as Efficient Yeager-Type Photocatalysts for H2O2 Generation in a Two-Phase System DOI
Aiguo Kong, Tao Yang, Hai Yan

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: June 5, 2025

Photocatalytic reduction of oxygen to hydrogen peroxide (H2O2) represents an attractive solar-to-chemical conversion pathway. Nevertheless, it remains a significant challenge achieve efficient H2O2 photosynthesis while simultaneously mitigating photocorrosion the catalysts owing presence superoxide radicals (•O2-) and accumulation photoexcited holes (h+). In present work, 1,2,3,4-tetrahydroisoquinoline (THIQ)-water two-phase system was developed high-efficiency durable production by suppressing •O2- intermediates rapidly consuming h+. The •O2--free direct two-electron reaction (2e- ORR) accomplished on special three-dimensional (3D) covalent organic framework (COF) metal-free photocatalysts consisting bicarbazole units (BCTB) as electron donors thiazole (BT) or triazine (TAPT) acceptors (COF-BCTB-BT COF-BCTB-TAPT). unique structures endow them with high rate in water phase ∼33.2 mmol gcat.-1 h-1 over COF-BCTB-BT. other phase, h+ also efficiently consumed semidehydrogenation THIQ (THIQ-SDR) 3,4-dihydroisoquinoline (DHIQ). Theoretical calculations revealed Yeager-type four-step 2e- ORR mechanism two COFs, lower energy barrier *O-O *O-OH for A THIQ-SDR DHIQ suggested. This work provides impressive strategy 3D bis-heterocyclic COF photocatalysts, effectively both formation accumulation.

Language: Английский

Citations

0