2018
DOI: 10.1021/acscatal.7b02961
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Development of a Lower Energy Photosensitizer for Photocatalytic CO2 Reduction: Modification of Porphyrin Dye in Hybrid Catalyst System

Abstract: A series of Zn–porphyrin dyes was prepared and anchored onto a TiO2 surface to complete a dye-sensitized photocatalyst system, Zn–porphyrin-|TiO2|-Cat, and tested as lower energy photosensitizers for photocatalytic CO2 reduction. Three major synthetic modifications were performed on the Zn–porphyrin dye to obtain a lower energy sensitization and improve the catalyst lifetime. We found that incorporating acetylene and linear hexyl groups into the Zn–porphyrin core allowed facile lower energy sensitization, and … Show more

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Cited by 88 publications
(111 citation statements)
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“…[39,43,55] This interpretation is in line with our previousr eports that ah ighly durable and efficient photocatalysis is achieved only by TiO 2 immobilization of af ragile organic PS, which allows efficient charge separation and injection during photolysis. [39] Irradiation at al ongerw avelength (l > 500 nm, instead of l > 435 nm) slightly increased the TON to 407 during 150 h; this implies that the lower energy irradiation prevents photobleaching. [25,26,39] Because Brønsted acids and metal cations are known to exert ap ositive effect on Re I -a nd Mn I -based CO 2 reduction,w e furthert ested the photocatalytic performance of this hybrid system in the presence of such additives as water and trifluoroethanol (TFE;T able 4).…”
Section: Photocatalytic Activitysupporting
confidence: 80%
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“…[39,43,55] This interpretation is in line with our previousr eports that ah ighly durable and efficient photocatalysis is achieved only by TiO 2 immobilization of af ragile organic PS, which allows efficient charge separation and injection during photolysis. [39] Irradiation at al ongerw avelength (l > 500 nm, instead of l > 435 nm) slightly increased the TON to 407 during 150 h; this implies that the lower energy irradiation prevents photobleaching. [25,26,39] Because Brønsted acids and metal cations are known to exert ap ositive effect on Re I -a nd Mn I -based CO 2 reduction,w e furthert ested the photocatalytic performance of this hybrid system in the presence of such additives as water and trifluoroethanol (TFE;T able 4).…”
Section: Photocatalytic Activitysupporting
confidence: 80%
“…This is consistent with the dye concentration dependency observedi no ur previous Re I -based ternary analogues (dye/TiO 2 /Re I catalyst). [34,35,[37][38][39][40] Figure 7s hows typical plots of TON and mmol versusi rradia-tion time for the CO formation of the IrP(0.1 mmol)/TiO 2 /ReP ternary series. Under the optimum condition, the AQYs of IrP/ TiO 2 /ReP hybrids at l = 436 nm were determined to be 0.16-0.40 %( Ta ble3).…”
Section: Photocatalytic Activitymentioning
confidence: 99%
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“…The researchers believe that both strong electrons coupling between the Q band of ZnP and the CB of TiO 2 and the presence of various shallow surface trapping sites (0.3~1.0 eV lower than the CB of TiO 2 ) contributed to this effective electron injection, showing the overall photophysical reaction path between ZnP and TiO 2 particles in Figure 13F. 129 TA spectroscopy was used to study the dynamics of excited carriers in p-type pentacene (0D) and n-type monolayer MoS 2 (2D) hybrid. Previously, the mechanism and time constant of the exciton decay in MoS 2 were studied ( Figure 13G).…”
Section: Carrier Dynamicsmentioning
confidence: 99%
“…Won and coworkers [208] developed a series of Znporphyrin dyes to be anchored onto TiO 2 surfaces to complete a dye-sensitized photocatalyst system based on Zn-porphyrin-|TiO 2 |-Re(Cl)(CO) 3 (ByPh). These dyes were tested as low-energy photosensitizers for photocatalytic CO 2 reduction.…”
Section: International Journal Of Photoenergymentioning
confidence: 99%