Abstract:The photocatalytic conversion of organic wastewater into value-added chemicals is a promising strategy to solve the environmental issue and energy crisis. Herein, Co/In 2 O 3 nanotubes with a double-shell structure, as a highly efficient photocatalyst, are synthesized by a one-step calcination method. The Co/In 2 O 3 heterostructure shows an outstanding photocatalytic CO 2 reduction performance of 4902 μmol h −1 g −1 . Notably, these Co/In 2 O 3 photocatalysts also achieve CO 2 self-generation and in situ redu… Show more
“…45 The Co 2p peaks of CDs-M-CIO at 781.5 eV (Co 2+ 2p 3/2 ) and 796.6 eV (Co 2+ 2p 1/2 ) shift to higher binding energies, probably due to electrons deviated from M-Co 3 O 4 caused by the intimate interface of the CDs-M-CIO heterojunction. 20,46 As shown in Fig. 2l, the O 1s spectrum of M-In 2 O 3 can be fitted by three peaks at 529.7, 531.2 and 532.4 eV, attributable to In–O lattice oxygen (O L ), oxygen vacancies (O V ) and surface-bound hydroxyls (O OH ), respectively, and the peaks of M-Co 3 O 4 are located at 530 eV (O L ), 531.3 eV (O V ) and 533.0 eV (O OH ).…”
Section: Resultsmentioning
confidence: 87%
“…After introduction of CDs, the peaks of the CDs-M-CIO composite are at 604 cm −1 (In–O), 658 cm −1 (Co–O), 1400 cm −1 (C–O–C) and 1630 cm −1 (CO), and the peaks of the CDs in the composite are shifted slightly compared with pristine CDs, indicating the existence of interaction between the CDs and the binary metal oxides. 20…”
Section: Resultsmentioning
confidence: 99%
“…16–19 More recently, we reported that the [Ru(bpy) 3 ]Cl 2 modified metal oxide catalysts to effectively convert CO 2 into syngas. 20 However, these noble metal photosensitizers also suffer from high cost, complicated synthetic processes and low durability, which limit their large-scale catalytic applications.…”
Photocatalytic conversion of CO2 to fuels is one of the most promising methods to reduce carbon emission and store solar energy. Many developed catalysts always need the noble metal complex...
“…45 The Co 2p peaks of CDs-M-CIO at 781.5 eV (Co 2+ 2p 3/2 ) and 796.6 eV (Co 2+ 2p 1/2 ) shift to higher binding energies, probably due to electrons deviated from M-Co 3 O 4 caused by the intimate interface of the CDs-M-CIO heterojunction. 20,46 As shown in Fig. 2l, the O 1s spectrum of M-In 2 O 3 can be fitted by three peaks at 529.7, 531.2 and 532.4 eV, attributable to In–O lattice oxygen (O L ), oxygen vacancies (O V ) and surface-bound hydroxyls (O OH ), respectively, and the peaks of M-Co 3 O 4 are located at 530 eV (O L ), 531.3 eV (O V ) and 533.0 eV (O OH ).…”
Section: Resultsmentioning
confidence: 87%
“…After introduction of CDs, the peaks of the CDs-M-CIO composite are at 604 cm −1 (In–O), 658 cm −1 (Co–O), 1400 cm −1 (C–O–C) and 1630 cm −1 (CO), and the peaks of the CDs in the composite are shifted slightly compared with pristine CDs, indicating the existence of interaction between the CDs and the binary metal oxides. 20…”
Section: Resultsmentioning
confidence: 99%
“…16–19 More recently, we reported that the [Ru(bpy) 3 ]Cl 2 modified metal oxide catalysts to effectively convert CO 2 into syngas. 20 However, these noble metal photosensitizers also suffer from high cost, complicated synthetic processes and low durability, which limit their large-scale catalytic applications.…”
Photocatalytic conversion of CO2 to fuels is one of the most promising methods to reduce carbon emission and store solar energy. Many developed catalysts always need the noble metal complex...
“…27,28 In our previous work, the ZIF-67/MIL-68-derived Co/In 2 O 3 heterostructure indicates an excellent photocatalytic CO 2 reduction performance. 29 Benefiting from the unique MOF-on-MOF structure, MOF-derived metal oxide heterostructures can possess high-quality contact for better light utilization and appropriate band alignment at the p−n heterojunction interfaces. 30 Thus, we believe that the Co 3 O 4 / TiO 2 heterojunction originated from MOFs could have a strong interaction effect on the photocatalytic CO 2 reduction performance.…”
Section: Introductionmentioning
confidence: 99%
“…MOFs with porous coordination structures act as an ideal template to produce metal oxides or metal nanoparticles under an air or a N 2 atmosphere through one-step pyrolysis, which can inherit the original morphology of MOFs, provide plentiful active sites, and enhance the stability and electrical conductivity. , In our previous work, the ZIF-67/MIL-68-derived Co/In 2 O 3 heterostructure indicates an excellent photocatalytic CO 2 reduction performance . Benefiting from the unique MOF-on-MOF structure, MOF-derived metal oxide heterostructures can possess high-quality contact for better light utilization and appropriate band alignment at the p–n heterojunction interfaces .…”
Photocatalytic CO2 reduction
to carbon fuels is regarded
as an ideal and sustainable way to provide clean energy and solve
environmental crisis. Herein, a p–n Co3O4/TiO2 heterojunction photocatalyst was synthesized by
one-step pyrolysis of self-assembly ZIF-67/MIL-125, which was used
in photocatalytic CO2 reduction for the first time. Co3O4 nanocages were highly dispersed on the surface
of TiO2 nanoplates with an intimate contact. The optimal
Co3O4/TiO2 exhibited a significantly
enhanced CO evolution rate of 1256 μmol g–1 h–1 under simulated solar light, which was 2.4
times higher than that of pure Co3O4. The high
photocatalytic performance of Co3O4/TiO2 was attributed to its enriched active sites and formed p–n
heterojunctions. According to the electrocatalytic measurements, the
possible mechanism and photoinduced charge transfer process were discussed
in detail. We believe that this research provides a facile and efficient
approach to fabricate MOF-derived heterojunction photocatalysts for
CO2 reduction.
The conversion of carbon dioxide (CO2) into value‐added chemicals presents an innovative pathway for advancing the low‐carbon clean energy revolution, contributing significantly to CO2 emission reduction and resource utilization. Recently, In2O3‐based catalysts have emerged as a promising frontier in CO2 hydrogenation research. This review provides a comprehensive introduction of the latest advancements in the application of In2O3‐based catalysts across thermal, photocatalytic, and photothermal catalysis platforms. The review examines critical aspects such as structural properties, active sites, reaction mechanisms, performance enhancement, product impact, and the development of multi‐functional catalytic systems. Thermal Catalysis for CO2 hydrogenation involves the application of elevated temperatures to initiate and drive the hydrogenation reactions. Photocatalysis, on the other hand, harnesses light energy to facilitate these reactions. Among these approaches, photothermal catalysis has emerged as a particularly promising method for CO2 hydrogenation, offering several advantages over both thermal catalysis and photocatalysis. These advantages include more efficient energy utilization, a broader range of reaction conditions, enhanced synergistic effects, selective activation, and improved environmental sustainability. This review not only summarizes the current state of research in this field but also may provide critical insights and guidance for future studies aimed at advancing artificial carbon cycling processes.
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