Constructing a novel family of halogen-doped covalent triazine-based frameworks as efficient metal-free photocatalysts for hydrogen production

Cheng, Zhi; Zheng, Kaiyun; Lin, Guiyun; Fang, Shengqiong; Li, Liuyi; Bi, Jinhong; Shen, Jinni; Wu, Ling

doi:10.1039/c9na00089e

Cited by 48 publications

(33 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A series of halogen (F, Cl and Br)-doped CTFs was prepared by thermal treatment of CTF-1 with excessive ammonium halide. 162 As compared with pristine CTF-1, halogen-doped CTF-1 with decreased Nyquist plot diameter and higher photocurrent density revealed the improved efficiency of charge separation and transfer (Fig. 9a and 9b).…”

Section: Elemental Dopingmentioning

confidence: 89%

Covalent organic framework photocatalysts: structures and applications

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Elemental Dopingmentioning

confidence: 89%

Covalent organic framework photocatalysts: structures and applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Moreover, Fe 10 /CTF‐1 and CTF‐1 presented comparable specific surface areas and porosity (Table S1). It could be inferred that surface property‐induced influence on H 2 production activity could be ignored in the photocatalytic process [19] …”

Section: Resultsmentioning

confidence: 99%

“…Thus, the band gap of CTF‐1 was reduced from 2.98 to 2.59 V and the light response range was drastically widened, based on the UV‐vis DRS results. The evidently advanced visible‐light adsorption triggered luxuriant photoinduced electrons for H 2 reduction [19] . Moreover, the more negative conduction potential obtained by optimized Fe doping offered a larger driving force for electrons transfer.…”

Section: Resultsmentioning

confidence: 99%

“…Previously, our research group first reported a nitrile trimerization reaction catalyzed by trifluoromethanesulfonic acid to synthesize the typical covalent triazine‐based frameworks CTF‐1, while its H 2 evolution activity was somehow unsatisfactory [18] . The visible‐light absorption and reduction ability of CTFs remain to be improved [19] . Notably, Jiang et al conducted theoretical calculation and proposed that using interlayer coupling or adjusting nitrogen content and pore size of CTFs are effective strategies to tailor its band gap [20] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Band Gap Tuning of Covalent Triazine‐Based Frameworks through Iron Doping for Visible‐Light‐Driven Photocatalytic Hydrogen Evolution

et al. 2021

Self Cite

View full text Add to dashboard Cite

Photocatalytic hydrogen energy production through water splitting paves a promising pathway for alleviating the increasingly severe energy crisis. Seeking affordable, highly active, and stable photocatalysts is crucial to access the technology in a sustainable manner. Herein, a trivalent iron‐doped covalent triazine‐based framework (CTF‐1) was elaborately designed in this study to finely tune the band structure and photocatalytic activity of CTF‐1 for H2 production. With optimal doping amount, Fe10/CTF‐1 exhibited a satisfying H2 production activity of 1460 μmol h−1 g−1, corresponding to 28‐fold enhancement compared with pure CTF‐1. The Fe3+ doping is responsible for a remarkedly broadened visible‐light adsorption range, improved reduction ability and inhibited electron–hole recombination of CTF‐1. Specifically, the doped Fe3+ could serve as photocatalytically active center and “electron relay” to accelerate charge separation and transformation. This study offers a feasible strategy to validly design and synthesize CTF‐based photocatalytic materials to efficiently utilize solar energy.

show abstract

“…Additionally, the halogen groups were integrated into the polymer backbone via a facile thermal treatment with ammonium halide, where the visible light absorption edge was enlarged from ≈ 420 to ≈ 700 nm. [108] The PHE performance of Cl-doped polymer shows a 7.1-fold increase compared with the pristine un-doped polymer.…”

Section: Modification With Functional Substituentsmentioning

confidence: 97%

Pathways towards Boosting Solar‐Driven Hydrogen Evolution of Conjugated Polymers

Liu

Xiang

2021

Small

View full text Add to dashboard Cite

Photocatalytic H2 evolution under solar illumination has been considered to be a promising technology for green energy resources. Developing highly efficient photocatalysts for photocatalytic water splitting is long‐term desired but still challenging. Conjugated polymers (CPs) have attracted ongoing attention and have been considered to be promising alternatives for solar‐driven H2 production due to the excellent merits of the large π‐conjugated system, versatile structures, tunable photoelectric properties, and well‐defined chemical composites. The excellent merits have offered numerous methods for boosting photocatalytic hydrogen evolution (PHE) of initial CP‐based photocatalysts, whose apparent quantum yield is dramatically increased from <1 to >20% in recent five years. According to the photocatalytic mechanism, this review herein systematically summarizes three major strategies for boosting photocatalytic H2 production of CPs: 1) enhancing visible light absorption, 2) suppressing recombination of electron‐hole pairs, and 3) boosting surface catalytic reaction, mainly involving eleven methods, that is, copolymerization, modifying cross‐linker, constructing a donor‐acceptor structure, functionalization, fabricating organic heterojunction, loading cocatalyst, and surface modification. Finally, the perspectives towards the future development of PHE are proposed.

show abstract

Constructing a novel family of halogen-doped covalent triazine-based frameworks as efficient metal-free photocatalysts for hydrogen production

Abstract: Developing metal-free halogen-doped covalent triazine-based frameworks for enhanced visible-light-driven photocatalytic H2-production performances.

Cited by 48 publications

References 47 publications

Covalent organic framework photocatalysts: structures and applications

Covalent organic framework photocatalysts: structures and applications

Band Gap Tuning of Covalent Triazine‐Based Frameworks through Iron Doping for Visible‐Light‐Driven Photocatalytic Hydrogen Evolution

Pathways towards Boosting Solar‐Driven Hydrogen Evolution of Conjugated Polymers

Contact Info

Product

Resources

About