Aggregate-forming semi-synthetic chlorophyll derivatives / Ti3C2T MXene hybrids for photocatalytic hydrogen evolution

Efficient photocatalytic hydrogen production by organic–inorganic heterojunction structure in Chl@Cu2O/Ti3C2Tx

“…56 Meanwhile, Chl exhibits a series of characteristic vibrational peaks in the range from 2750 to 3000 cm −1 , which can be attributed to the stretching vibrational modes of C-H in the Chl molecule. 46 Finally, the characteristic vibrational peaks of Chl, Cu 2 O and Ti 3 C 2 T x can be observed simultaneously in the FT-IR spectra of Chl@Cu 2 O/Ti 3 C 2 T x , which demonstrates that the three materials, i.e., Chl, Cu 2 O and Ti 3 C 2 T x , are simultaneously present in the Chl@Cu 2 O/Ti 3 C 2 T x composites. At the same time, it is worth mentioning that no additional characteristic peaks were observed in the FT-IR spectra of the Chl@Cu 2 O/Ti 3 C 2 T x composites, which indicates that there are only simple physical contact interactions between the three materials, i.e., Chl, Cu 2 O and Ti 3 C 2 T x , rather than chemical connection interactions.…”

“…42 A derivative (named as Chl hereafter) of chlorophyll-a, the most essential natural pigment in photosynthetic activity in nature, is constantly and efficiently converting solar energy into chemical energy. [43][44][45] Due to the strong visible-near-infrared light absorption and specific electron transfer capability of its self-aggregates, [46][47][48] Chl has been widely used in solar cells, photocatalysis and energy storage. [49][50][51] The near-infrared absorption of Chl aggregates extends the absorption spectral range of Cu 2 O, which generates a large number of photogenerated electrons to participate in the hydrogen production, and at the same time, the organic-inorganic heterojunction structure constructed by the interleaved energy band structure of Chl and Cu 2 O leads to the efficient photogenerated carrier separation.…”

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

“…For instance, Li et al deposited supramolecular aggregates of zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide a (Chl-1) on the multilayer Ti 3 C 2 T x MXene nanosheets . The Chl-1 aggregates were excited under visible-to-NIR-light irradiation, and the excited state transferred from the Chl-1 aggregate to the contact surface the Ti 3 C 2 T x MXene, where the electron swiftly migrated to the MXene nanosheet while the hole returned to the opposite end of the aggregate to react with a sacrificial reagent (ascorbic acid) , (Figure (a)). The electrons in the MXene nanosheet cocatalyst combined with H + and resulted in the production of H 2 (Figure (a)).…”

“…(a) Schematic diagram of H 2 production for the Chl-1/Ti 3 C 2 T x composites under visible-light irradiation. (Reprinted with permission from ref . Copyright 2021, Elsevier.)…”

Biohybrid Organic Heterostructure Based on Chlorophyll‐Bacteriochlorophyll Aggregates for Ecofriendly Hydrogen Production

“…This is mainly attributed to the pristine and conventional semiconductor photocatalysts' poor ability to capture visible light, weak capacity for photoinduced charge transfer and fast photogenerated electron-hole pair recombination. In order to enhance the photogenerated carrier separation efficiency and photocatalytic activity, several strategies have been proposed such as the introduction of heterojunction structure formation, [11][12][13] the molecular structure engineering [14] and the introduction of noble metals [15] and noble metal oxides. [16,17] Additionally, co-catalyst loading in hybridized systems plays a vital role in the promotion of photoinduced electron-hole pair separation and to accelerate the reaction kinetic process.…”