An artificial photosynthesis system comprising a covalent triazine framework as an electron relay facilitator for photochemical carbon dioxide reduction

Abstract

A ternary electron transfer relay photocatalytic system for CO2 reduction was fabricated by decorating a porphyrin-based covalent triazine framework with α-Fe2O3 nanoparticles, and then further coupled with a Ru complex photosensitizer.

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

“…To determine the origin of CO 2 photoreduction products, we performed an isotope-labeled carbon dioxide ( 13 CO 2 ) photocatalytic reduction over TC2. Since the amount of products without photosensitizer and hole sacrificial agent was beyond the detection limit of mass spectrometry detector, we added tris(2,2’-bipyridyl)ruthenium(II) chloride hexahydrate ([Ru II (bpy) 3 ]Cl 2 ·6H 2 O) 36 and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH) 37 into the system to promote the photocatalytic activity, which behaved as the photosensitizer and hole sacrificial agent, respectively. In this case, the production yields of H 2 and CO were significantly enhanced (Supplementary Fig.…”

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

“…The Brunner–Emmet–Teller (BET) specific surface area, pore size, and chemical structure of the POPs determine their CO 2 adsorption ability [10] . Increasing the BET specific surface area and micropore ratio of POPs is the most common method to optimize the adsorption capacity of CO 2 [11] . Adding cationic sites to the backbone of POPs or introducing cationic ionic liquid as the solvent for catalytic reaction also can work [12,13] .…”

“…Zhang et al . prepared porphyrin‐based CTF (Por‐CTF), and the α ‐Fe 2 O 3 nanoparticles and Ru complex as photosensitizers were incorporated into the Por‐CTF using in situ strategies [11] . The photocatalytic activity of the obtained material to reduce CO 2 to CO is significantly enhanced as compared with the photocatalytic activity of the material without α ‐Fe 2 O 3 .…”

Photocatalytic syngas production using conjugated organic polymers

“…Recently, there has been growing interest in using conjugated materials as photocatalysts due to their tunability and large synthetic diversity, initially for photocatalytic hydrogen production, [7][8][9][10][11][12][13] but more recently also for CO 2 reduction. Organic materials such as conjugated microporous polymers (CMPs), 14,15 covalent triazine-based frameworks (CTFs), 16,17 covalent organic frameworks (COFs) [18][19][20][21] and unbranched conjugated polymers 22 have been investigated for their potential as photocatalysts in CO 2 reduction.…”