Thiophene-containing conjugated polymers modified Zn0.5Cd0.5S inorganic/organic S-scheme heterojunction for boosting photocatalytic hydrogen production coupled with benzyl alcohol oxidation

Chemical Engineering Journal, Год журнала: 2024, Номер 496, С. 154107 - 154107

Опубликована: Июль 18, 2024

Язык: Английский

---

Accessing Poly(DA-ran-Dπ) Ternary Copolymers via Direct C–H Arylation for Ultrahigh Photocatalytic Hydrogen Production

Macromolecules, Год журнала: 2024, Номер 57(15), С. 7208 - 7218

Опубликована: Авг. 1, 2024

π-Conjugated polymers (CPs) bearing alternating electron donor–acceptor (D–A) blocks have been widely exploited as promising photocatalysts for hydrogen production. However, little attention has paid to the D–A ternary polymer photocatalysts, and current investigations on such a system are mainly focused D−π–A type by inserting π-bridge between D A units. Herein, new of polymeric namely poly(DA-ran-Dπ), were designed facilely constructed via atom-economical direct C–H arylation polymerization (DArP), in which benzothiophene-5,5-dioxide (DBTSO2), 3,4-ethylenedioxythiophene (EDOT), phenyl serve acceptor, donor, π-spacer, respectively. Our findings reveal that DBTSO2, EDOT, building can exert synergic effects promoting hydrophilicity, interactions, charge separation resulting CPs. Compared binary EDBz-0, EDBz-25 exhibits much superior photocatalytic performance, yielding evolution rate up 241.5 mmol g–1 h–1 with an unprecedented apparent quantum yield 28.62% at 500 nm wavelength without aid Pt cocatalyst. The water-displacing setup reveals 91 mL H2 gas be quickly produced within 2 h using only 3 mg photocatalyst. construction CPs DArP, developed work, offers opportunity design green synthesis semiconductors renewable energy applications.

Язык: Английский

---

Pyrene based crosslinked conjugated microporous polymer catalysts for photocatalytic hydrogen evolution reaction: The neglected influences of cross linking degree

Fuel, Год журнала: 2024, Номер 366, С. 131415 - 131415

Опубликована: Март 7, 2024

Язык: Английский

---

2D Perovskite/Organic Heterojunction Black‐Light Level Photodetector with Record‐High Detectivity

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 9, 2025

Abstract 2D single‐crystal perovskites have attracted interest due to their excellent photoelectric properties and improved moisture stability, making them promising for various optoelectronic applications. However, challenges remain, particularly low carrier collection efficiency caused by high exciton binding energy. This study introduces self‐powered heterojunction photodetectors (PDs) based on (PEA) 2 PbI 4 /ZnPc, enhancing conduction the configuration of lateral electrodes regulating carrier/exciton dynamics via design. The PD achieves an impressive detectivity 1.14 × 10 16 Jones, a 770% increase compared control, with detection limit reaching black‐light level 3 pW cm −2 under 532 nm at 1 V bias. performance surpasses all previously reported perovskite PDs is attributed suppressed dark current increased photocurrent. built‐in electric field counteracts part forward bias, reducing intrinsic motion in dark. It also effectively dissociates photogenerated excitons, minimizing radiative recombination illumination. allows device detect weak light self‐driven mode. Additionally, extends detectable wavelength 980 nm. has been successfully applied acousto‐optic conversion communication, highlighting its potential low‐power, energy‐efficient optical communication solutions.

Язык: Английский

---

Enhancing photocatalytic hydrogen production in conjugated porous polymers through donor-π-donor fragment insertion

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 79, С. 492 - 502

Опубликована: Июль 8, 2024

Recent progress in conjugated polymer photocatalysts has opened avenues for enhancing photocatalytic hydrogen production (PHP) activity through structural design. This study highlights the impact of acceptor-to-donor feed ratio on PHP copolymers, influencing their energy level structures. Five porous polymers (CPPs) were synthesized by adjusting molar ratio. Notably, at a 2:1 ratio, demonstrated high evolution rate (HER) 61.9 mmol g−1 h−1 under full arc irradiation without co-catalysts and an apparent quantum yield (AQY) 7.77% 475 nm. However, further increasing proportion donor unit copolymers decreases HER. Experiments theoretical simulation characterized that ratios effectively tune polymer's molecular structure, hydrophilicity, band gap, generation transport efficiency photo-induced charge carriers, ultimately affecting kinetics efficiency. research demonstrates tuning structure chemical compositions CPPs statistical copolymerization significantly impacts activity.

Язык: Английский

---

Arrangement of Ordered D–A Components in a Metal‐Organic Framework for Cocatalyst‐Free Photocatalytic Hydrogen Evolution with Efficient Proton Conduction

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Abstract The arrangement of donor–acceptor (D–A) components in order at a molecular level provides means to achieve efficient electron‐hole separation for promoting the activity photocatalysts. Herein, we report coordination assembly D–A molecules with desired staggered energy levels two isostructural metal‐organic frameworks (MOFs) 1 and 2 , which exhibit high photocatalytic hydrogen evolution without using any cocatalysts photosensitizers. modulation active metal sites MOFs leads an increase rates from 1260 3218 µmol h −1 g . A detailed mechanism study revealed that bond defined by assisted centers is key efficiently generating photogenerated charge carriers, has appropriate affinity proton reduce barrier evolution. Besides, enhanced transport kinetics based on arrayed free carboxyl groups hydrogen‐bonded network endows higher conductivity than thus usage rate reaction kinetics.

Язык: Английский

---

Arrangement of Ordered D–A Components in a Metal‐Organic Framework for Cocatalyst‐Free Photocatalytic Hydrogen Evolution with Efficient Proton Conduction

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Abstract The arrangement of donor–acceptor (D–A) components in order at a molecular level provides means to achieve efficient electron‐hole separation for promoting the activity photocatalysts. Herein, we report coordination assembly D–A molecules with desired staggered energy levels two isostructural metal‐organic frameworks (MOFs) 1 and 2 , which exhibit high photocatalytic hydrogen evolution without using any cocatalysts photosensitizers. modulation active metal sites MOFs leads an increase rates from 1260 3218 µmol h −1 g . A detailed mechanism study revealed that bond defined by assisted centers is key efficiently generating photogenerated charge carriers, has appropriate affinity proton reduce barrier evolution. Besides, enhanced transport kinetics based on arrayed free carboxyl groups hydrogen‐bonded network endows higher conductivity than thus usage rate reaction kinetics.

Язык: Английский

---

The competitive influence of the intramolecular electric field and hydrophilic active sites of D–A conjugated porous polymers on photocatalytic hydrogen evolution performance

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Conjugated porous polymers (CPPs) with a donor–acceptor (D–A) molecular structure usually exhibit good photocatalytic hydrogen evolution (PHE).

Язык: Английский

---

Design of azo-functionalized D-A conjugated organic polymers for photocatalytic reduction of ultra-low concentration CO2

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125520 - 125520

Опубликована: Май 1, 2025

Язык: Английский

---

Local weak hydrogen bonds induced dipole–dipole interactions in polymer for enhancing photocatalytic oxidation

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 669, С. 393 - 401

Опубликована: Май 1, 2024

Язык: Английский

---