Cryo-induced closely bonded heterostructure for effective CO2 conversion: The case of ultrathin BP nanosheets/g-C3N4

Zhou, Guli; Yang, Jinman; Zhu, Xingwang; Li, Qidi; Yu, Qing; El-Alami, Wiam; Wang, Chongtai; She, Yuanbin; Qian, Junchao; Xu, Hui; Li, Huaming

doi:10.1016/j.jechem.2020.01.020

Cited by 60 publications

(47 citation statements)

References 47 publications

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“…74-1878) can be detected, corresponding to the (002), (004), and (006) crystal planes. 31 In contrast, there is no obvious difference in the typical peak position between BPs and BPs-H (BPs with DMF heating treatment), and the peaks are still identifiable. It is worth noting that BPs-H shows lower peak intensity, which is the characteristics of the deteriorated crystal structure attributing to the decomposition of the BPs during the DMF solvothermal process with the formation of P defects.…”

Section: Resultsmentioning

confidence: 98%

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Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Zhu

Zhou

et al. 2021

ACS Appl. Mater. Interfaces

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Photocatalytic CO 2 reduction is a means of alleviating energy crisis and environmental deterioration. In this work, a rising two-dimensional (2D) material rarely reported in the field of photocatalytic CO 2 reduction, black phosphorus (BP) nanosheets, is synthesized, on which Co 2 P is in situ grown by solvothermal treatment using BP itself as a P source. Co 2 P on the BP nanosheets (BPs) surface can prevent the destruction of BPs in ambient air and, in the meantime, favor charge separation and CO 2 adsorption and activation during the catalytic process. Upon light irradiation, Co 2 P can extract the photogenerated electrons effectively across the intimate interface and lower the CO 2 activation energy barrier, supported by both experimental characterizations and theoretical calculations. Benefitting from integrated advantages of BPs and Co 2 P, the optimal Co 2 P/BPs exhibit photocatalytic reduction of CO 2 to CO at a rate of 25.5 μmol g −1 h −1 with a selectivity of 91.4%, both of which are higher than those of pristine BPs. This work presents ideas for stabilizing BPs and improving their CO 2 reduction performance simultaneously.

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Section: Resultsmentioning

confidence: 98%

“…Bulk BP was prepared using similar methods to our previous reports. 30,31 2.2. Preparation of BP Nanosheets.…”

Section: Methodsmentioning

confidence: 99%

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Zhu

Zhou

et al. 2021

ACS Appl. Mater. Interfaces

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“…[33] In addition, the binding energies of BP are slightly shifted after the interfaced with Co 2 P, indicating that there is interaction force and charge transfer between BP and Co 2 P. Meanwhile, the P 2p spectrum of 10% Co 2 P@BP/g-C 3 N 4 is similar to Co 2 P@ BP along with 0.3 eV of negative shift, revealing that the 10% Co 2 P@BP/g-C 3 N 4 hybrid can receive more electrons, leading to the increased electron density and decreasing binding energy. [34] For Co 2p XPS spectra (Figure 2d), Co 2 P@BP displays four peaks at 781.33, 786.36, 797.29, and 804.08 eV, which are assigned to the binding energies of Co 2+ /2p 3/2 , Co 3+ /2p 3/2 , Co 2+ /2p 1/2 , and Co 3+ /2p 1/2 , respectively. These peaks are attributed to the co-exist of Co(II) and Co(III), in which Co(II) is the dominant position due to its high fitted area of the Gaussian components.…”

Section: Chemical States and Crystal Phasementioning

confidence: 99%

Highly Selective and Efficient Solar‐Light‐Driven CO₂ Conversion with an Ambient‐Stable 2D/2D Co₂P@BP/g‐C₃N₄ Heterojunction

Yang

et al. 2021

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concentration of CO 2 in the atmosphere has far exceeded 400 ppm. [1] For these challenges, many countries including China have recently proposed series of countermeasures, e.g., "carbon peaked" and "carbon neutral" targets about CO 2 , vigorous exploitation of clean new energy, etc. Now, reduced CO 2 content coupled with developing clean energy is becoming one of the most urgent and significant things for the world. [2] Renewable solar-light-driven conversion of CO 2 to high valuable fuels or chemicals based on semiconductor materials is a feasible and prospective strategy, due to its numerous advantages such as energysaving, environmentally friendly, green, and mild conditions, which can ingeniously solve the above two difficult problems simultaneously. However, CO 2 is stable and difficult to be reduced due to its strong CO dissociation (≈750 kJ mol -1 ). It is crucial to choose suitable semiconductor materials for photocatalytic CO 2 conversion. [3] 2D semiconductor photocatalytic materials are a group of potential candidates for CO 2 conversion due to their excellent in-plane charge carrier mobility, more catalytically active sites, and easier construction of interface heterojunctions. For example, the 2D materials of g-C 3 N 4 , [4] metal-organic frameworks, [5] covalent organic frameworks, [6] titanium dioxide (TiO 2 ), [7] graphene oxide (rGO), [8] transition metal dichalcogenides, [9] etc., have been proved as excellent catalysts for CO 2 conversion. Especially, the metal-free g-C 3 N 4 is very popular owing to its high photocatalytic activity, suitable band gap (≈2.7 eV), conduction band (CB) potential for CO 2 reduction, low cost, high chemical stability, and easy to prepare. [10] However, the photocatalytic CO 2 reduction performance of pristine g-C 3 N 4 is far from researchers' anticipation, which is mainly due to its rapid recombination of photogenerated carriers, unsatisfactory solar light absorption capacity, and poor charge transfer efficiency. [11] To address this, establishing suitable 2D/2D heterojunction is a promising route to resolve the above drawbacks of g-C 3 N 4 material. This strategy can effectively regulate the solar light response, CB level, charges separation and transfer, catalytic active site, reaction energy barrier, and Gibbs free energy of catalysts during CO 2 conversion. [12] For instance, Yang et al.Renewable solar-driven carbon dioxide (CO 2 ) conversion to highly valuable fuels is an economical and prospective strategy for both the energy crisis and ecological environment disorder. However, the selectivity and activity of current photocatalysts have great room for improvement due to the diversification and complexity of products. Here, an ambient-stable 2D/2D Co 2 P@BP/g-C 3 N 4 heterojunction is designed for highly selective and efficient photocatalytic CO 2 reduction reaction. The resulting Co 2 P@BP/g-C 3 N 4 material has a remarkable conversion of CO 2 to carbon monoxide (CO) with an ≈96% selectivity, coupled with a dramatically increased CO generation rate...

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“…Zhou et al fabricated a 2D/2D black phosphorus/g‐C 3 N 4 nanosheet heterostructure with excellent photocatalytic performance (CO 2 to CO) at extremely low temperature. [ 113 ] The black phosphorus/g‐C 3 N 4 nanosheet heterostructure belongs to type I heterojunction, as the CB (−1.71 V) and the VB (0.24 V) potentials of black phosphorus are, respectively, lower and higher than the CB (−2.00 V) and the VB (1.00 V) potentials of g‐C 3 N 4 , versus normal hydrogen electrode (NHE), the photogenerated electrons and holes in g‐C 3 N 4 will migrate to black phosphorus. Carrier recombination is suppressed by timely consumption of holes using TEOA as a sacrificial agent (Figure 14c), leading to much enhanced photocatalytic activity and selectivity for CO 2 RR.…”

Section: Functional Materials/g‐c3n4 Composites For Photocatalytic Co2rrmentioning

confidence: 99%

Recent Progress on Carbon Nitride and Its Hybrid Photocatalysts for CO₂ Reduction

et al. 2020

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Graphitic carbon nitride as a novel photocatalyst for CO2 reduction reaction (CO2RR) has attracted many recent efforts on the synthesis and modification for improving efficiency and selectivity. Herein, an overview of fundamental factors and the latest research progress of g‐C3N4‐based photocatalysts for CO2RR is provided. The main strategies of fabrication and modification to obtain g‐C3N4 and g‐C3N4‐based composites with high CO2RR efficiency are summarized. Working mechanisms of each enhancement approach in terms of their effects on electronic band structures, light‐harvesting capability, CO2 adsorption capacity, separation of photogenerated electron–hole pairs etc. are explained and discussed. Finally, a brief overview on the challenges and new directions in this field is proposed.

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Cryo-induced closely bonded heterostructure for effective CO2 conversion: The case of ultrathin BP nanosheets/g-C3N4

Cited by 60 publications

References 47 publications

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Highly Selective and Efficient Solar‐Light‐Driven CO₂ Conversion with an Ambient‐Stable 2D/2D Co₂P@BP/g‐C₃N₄ Heterojunction

Recent Progress on Carbon Nitride and Its Hybrid Photocatalysts for CO₂ Reduction

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Cryo-induced closely bonded heterostructure for effective CO2 conversion: The case of ultrathin BP nanosheets/g-C3N4

Cited by 60 publications

References 47 publications

Accelerated Photoreduction of CO2 to CO over a Stable Heterostructure with a Seamless Interface

Accelerated Photoreduction of CO2 to CO over a Stable Heterostructure with a Seamless Interface

Highly Selective and Efficient Solar‐Light‐Driven CO2 Conversion with an Ambient‐Stable 2D/2D Co2P@BP/g‐C3N4 Heterojunction

Recent Progress on Carbon Nitride and Its Hybrid Photocatalysts for CO2 Reduction

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Product

Resources

About

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Highly Selective and Efficient Solar‐Light‐Driven CO₂ Conversion with an Ambient‐Stable 2D/2D Co₂P@BP/g‐C₃N₄ Heterojunction

Recent Progress on Carbon Nitride and Its Hybrid Photocatalysts for CO₂ Reduction