Photocatalytic reduction of CO2 to CO over copper decorated g-C3N4 nanosheets with enhanced yield and selectivity

Shi, Guodong; Yang, Lin; Liu, Zhuo-wen; Xiao, Chen; Zhou, Haiqing; Yu, Ying

doi:10.1016/j.apsusc.2017.08.148

Cited by 144 publications

(48 citation statements)

References 60 publications

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“…[28] The diffraction peak at 27.3°c orresponding to the stack conjugated aromatic system shifts to 27.5°, indicating a distortion of g-CN structure. [35] Under hydrothermal condition, some polycondensation occurred between the small g-C 3 N 4 pieces in g-C 3 N 4 network, thus shortening the gallery distance between the basic units. The (002) diffraction peak of 3D g-C 3 N 4 shifted from 27.5 to 27.9°in composites, indicating a decrease in the interlayer stacking distance, which is advantageous for the photogenerated charge separation and transportation.…”

Section: Resultsmentioning

confidence: 99%

Z‐scheme 3 D g‐C₃N₄/TiO_2−x Heterojunctions with High Photocatalytic Efficiency

Liu

Yang

et al. 2020

ChemistrySelect

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The 3D network structure composed of g-C 3 N 4 nanorods was prepared via treatment of bulk g-C 3 N 4 with hot HNO 3 followed by adjustment the pH and lyophilization. Then the 3D g-C 3 N 4 / TiO 2À x heterojunctions with a strong interface was constructed via loading TiO 2À x nanoparticles onto the 3D g-C 3 N 4 networks under hydrothermal conditions. The structure and morphology of the 3D g-C 3 N 4 /TiO 2À x heterojunctions was characterized by infrared spectrum (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and field emission transmission electron microscope (TEM). The photo-degradation rate of Doxycycline HCl for 3D g-C 3 N 4 /TiO 2À x heterojunction is about 4 times of that original bulk-C 3 N 4 and 2.75 times of 3D g-C 3 N 4. The improved photocatalytic efficiency is attributed to 3D g-C 3 N 4 networks, which provides the more transfer channel to accelerate the electron transportation and the strong heterointerface between g-C 3 N 4 and TiO 2À x which promotes the separation of the electronholes. Besides, more adsorption capacity of the pollutant onto the 3D g-C 3 N 4 /TiO 2À x also contributed to this high efficiency.

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Section: Resultsmentioning

confidence: 99%

Z‐scheme 3 D g‐C₃N₄/TiO_2−x Heterojunctions with High Photocatalytic Efficiency

Liu

Yang

et al. 2020

ChemistrySelect

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“…Copper NPs have been effectively deposited on few layered g-C 3 N 4 and applied in CO 2 reduction in aqueous KHCO 3 medium. [87] CO was the only product detected in the gas phase and photoactivity was optimized with respect to the copper loading (6 wt.%). Cu particles on TiO 2 have been shown beneficial for CO evolution during CO 2 photoactivation.…”

Section: Copper Nps For Co 2 Conversionmentioning

confidence: 99%

Photocatalysis for Hydrogen Production and CO₂ Reduction: The Case of Copper‐Catalysts

2018

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Problems derived from climate change dictate the reestablishment of our prospective in energy production. In this direction, converting solar energy through photocatalysis into suitable fuels such as hydrogen and carbon‐based fuels by water splitting and CO2 reduction, respectively, has been established as a promising approach. Currently, the main concern in this field is the development of cost‐effective and efficient photocatalysts. Among the different systems studied, Cu‐based photocatalysts are considered attractive candidates for both applications due to their relative low‐cost, the natural abundance of the constituents and their promising reactivity. In this review, the current progress in the field of Cu‐based photoactive materials for both H2 production and CO2 reduction will be discussed. Finally, an outlook on the challenges and future research directions is given.

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“…The characteristicv ibration peaks [n as (CÀH) at 2922 cm À1 , n s (CÀH) at 2853 cm À1 , d(CH 3 )a t1 467 cm À1 ,a nd d(CÀC) at 722 cm À1 ]a ssigned to OAm can be observed in the FTIR spectra of OAm and [Pd(OAm) n ] 2 + complexes. [43][44][45] Compared with pure OAm, some vibration peaks of the [Pd(OAm) n ] 2 + complexes are clearly weakened or have disappeared, indicatingt hat OAm is bound to Pd ions by the ÀNH 2 group. After reduction, some faint OAm peaks still remaini n the FTIR spectra of Pd NMsa nd Pd NPs, suggesting that the formation of metal Pd is accompanied by the removal of the majority of OAm from the metal surface.…”

Section: Structure and Morphology Of Pd Nmsmentioning

confidence: 99%

Porous Palladium Nanomeshes with Enhanced Electrochemical CO₂‐into‐Syngas Conversion over a Wider Applied Potential

Xie

Ren

et al. 2019

ChemSusChem

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Electrochemical conversion of CO2 into syngas, which can be used directly in the classical petroleum industrial processes, provides a powerful approach for achieving the recycling of anthropogenic carbon. Pd has previously been reported to be capable of converting CO2 into syngas with various CO/H2 ratios, but only at limited applied potential, which is mainly attributed to fewer active sites exposed toward electrocatalysis. Herein, high‐performance Pd nanomeshes (NMs) assembled with branch‐like Pd nanoparticles were designed and synthesized by using a simple interface‐induced self‐assembly strategy; these NMs could catalyze CO2‐into‐syngas conversion with a high current density in a wide applied potential range from −0.5 to −1.0 V (vs. reversible hydrogen electrode). Further evidence validated that the enhanced activity of the Pd NMs was not only caused by the crosslinked network structure accelerating electron transport, but also by the greater number of edge and/or corner active sites exposed on the surface of the NMs, which facilitated CO2 adsorption, CO2.− formation, COOH* stabilization, and CO generation. Under optimal operating conditions, Pd NMs could balance two competing reactions: CO2 reduction and hydrogen evolution. The resultant syngases with the ideal and tunable CO/H2 ratio between 0.5:1 and 1:1 could be used directly for methanol synthesis and Fischer–Tropsch reactions.

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Photocatalytic reduction of CO2 to CO over copper decorated g-C3N4 nanosheets with enhanced yield and selectivity

Cited by 144 publications

References 60 publications

Z‐scheme 3 D g‐C₃N₄/TiO_2−x Heterojunctions with High Photocatalytic Efficiency

Z‐scheme 3 D g‐C₃N₄/TiO_2−x Heterojunctions with High Photocatalytic Efficiency

Photocatalysis for Hydrogen Production and CO₂ Reduction: The Case of Copper‐Catalysts

Porous Palladium Nanomeshes with Enhanced Electrochemical CO₂‐into‐Syngas Conversion over a Wider Applied Potential

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Photocatalytic reduction of CO2 to CO over copper decorated g-C3N4 nanosheets with enhanced yield and selectivity

Cited by 144 publications

References 60 publications

Z‐scheme 3 D g‐C3N4/TiO2−x Heterojunctions with High Photocatalytic Efficiency

Z‐scheme 3 D g‐C3N4/TiO2−x Heterojunctions with High Photocatalytic Efficiency

Photocatalysis for Hydrogen Production and CO2 Reduction: The Case of Copper‐Catalysts

Porous Palladium Nanomeshes with Enhanced Electrochemical CO2‐into‐Syngas Conversion over a Wider Applied Potential

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Product

Resources

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Z‐scheme 3 D g‐C₃N₄/TiO_2−x Heterojunctions with High Photocatalytic Efficiency

Z‐scheme 3 D g‐C₃N₄/TiO_2−x Heterojunctions with High Photocatalytic Efficiency

Photocatalysis for Hydrogen Production and CO₂ Reduction: The Case of Copper‐Catalysts

Porous Palladium Nanomeshes with Enhanced Electrochemical CO₂‐into‐Syngas Conversion over a Wider Applied Potential