2D/2D Mt/m-CN composite with enriched interface charge transfer for boosting photocatalytic CO2 hydrogenation by H2 to CH4 under visible light

Tahir, Beenish; Tahir, Muhammad Nawaz; Yunus, Mohd Azizi Che; Mohamed, Abdul Rahman; Siraj, Mohammad; Fatehmulla, Amanullah

doi:10.1016/j.apsusc.2020.146296

Cited by 31 publications

(13 citation statements)

References 56 publications

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“…Apart from the above-mentioned materials, several other layered materials such as Ni(OH) 2 , Mo 2 N, montmorillonite, cobalt phosphide (CoP), UNiMOF, MgFe MMO, and In 2 Se 3 MO 2 C have been reported, forming a 2D/2D vdW heterojunction with carbon nitrides to improve the photocatalytic performance (Table ). − Among them, the large band gap hexagonal boron nitride ( h -BN) is worth mentioning. − The h -BN possesses a 2D graphene-like structure, an excellent chemical stability, a high thermal conductivity, and a melting point which makes it suitable for various applications including lubricants to the high surface area supporting materials. However, due to a significantly high band gap (5.5 eV), it is among the less explored 2D materials in photocatalytic application.…”

Section: Miscellaneous 2d/2d Vdw Structuresmentioning

confidence: 99%

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

et al. 2021

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The surging demand for energy and staggering pollutants in the environment have geared the scientific community to explore sustainable pathways that are economically feasible and environmentally compelling. In this context, harnessing solar energy using semiconductor materials to generate charge pairs to drive photoredox reactions has been envisioned as a futuristic approach. Numerous inorganic crystals with promising nanoregime properties investigated in the past decade have yet to demonstrate practical application due to limited photon absorption and sluggish charge separation kinetics. Two-dimensional semiconductors with tunable optical and electronic properties and quasi-resistance-free lateral charge transfer mechanisms have shown great promise in photocatalysis. Polymeric graphitic carbon nitride (g-C3N4) is among the most promising candidates due to fine-tuned band edges and the feasibility of optimizing the optical properties via materials genomics. Constructing a two-dimensional (2D)/2D van der Waals (vdW) heterojunction by allies of 2D carbon nitride sheets and other 2D semiconductors has demonstrated enhanced charge separation with improved visible photon absorption, and the performance is not restricted by the lattice matching of constituting materials. With the advent of new 2D semiconductors over the recent past, the 2D/2D heterojunction assemblies are gaining momentum to design high performance photocatalysts for numerous applications. This review aims to highlight recent advancements and key understanding in carbon nitride based 2D/2D heterojunctions and their applications in photocatalysis, including small molecules activation, conversion, and degradations. We conclude with a forward-looking perspective discussing the key challenges and opportunity areas for future research.

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Section: Miscellaneous 2d/2d Vdw Structuresmentioning

confidence: 99%

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

et al. 2021

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“…Table 1 shows the improved yield in the present work compared with the yields in recently reported studies. 31,32 This confirmed improved CH 4 production 33,34 under photocatalysis.…”

Section: Resultsmentioning

confidence: 53%

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Shivaraju¹,

Anilkumar²,

Yashas³

et al. 2020

Biofuels Bioprod Bioref

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The development of improved catalysts for the hydrogenation of CO2 into methane is a sustainable response to the energy crisis and environmental problems at the global level. Mn‐Ce/N‐TiO2 heterojunctions, comprising a Mn‐Ce concretion composite, were prepared using a sol–gel technique, and the photocatalytic hydrogenation of CO2 was studied using visible light as alternative driving energy. The photocatalyst composite was characterized, and synergistic effects on the photocatalytic hydrogenation of CO2 into methane were investigated. The characterization results confirmed that there was a considerable shifting of band‐gap energy towards the visible range with required properties, which enhances photocatalytic activities under natural sunlight. Carbon dioxide hydrogenation and its potential for conversion into methane was evaluated using a specially designed photoreactor and different light sources. The results show a CO2 hydrogenation rate of about 16.8% ±0.2 in a visible light‐assisted catalytic reduction process in 60 min. The irradiation time and light source were studied and significant impacts on CO2 hydrogenation were observed under a LED light source and with H2O vapor as a reducing agent (up to 23.4% ± 0.2). The effect of photocatalysis on the methane yield in the anaerobic digestion (biomethanation) process was evaluated and a potential methane yield of up to 13.5% within 24 h was observed. The results suggested promising and sustainable applications of the Mn‐Ce/N‐TiO2 heterojunction composite for CO2 hydrogenation and for the conversion of CO2 into fuel and methane in the biomethanation process. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…Coordination complexes, montmorillonite (Mt), and MXene etc., have been, respectively, composited with g‐C 3 N 4 for promoting the photocatalytic CO 2 RR efficiency. [ 89,168–176 ] For instance, Kuriki et al prepared the Ru (I) complex/g‐C 3 N 4 composite which is a good heterogeneous photocatalyst for CO 2 RR under visible light. [ 169 ] The obtained optimized photocatalyst can converse CO 2 into HCOOH efficiently with high turnover numbers (>1000) and a relatively high apparent quantum efficiency (5.7% at 400 nm).…”

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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2D/2D Mt/m-CN composite with enriched interface charge transfer for boosting photocatalytic CO2 hydrogenation by H2 to CH4 under visible light

Cited by 31 publications

References 56 publications

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

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

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2D/2D Mt/m-CN composite with enriched interface charge transfer for boosting photocatalytic CO2 hydrogenation by H2 to CH4 under visible light

Cited by 31 publications

References 56 publications

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Facile synthesis of Mn‐Ce/N‐TiO2 composite for CO2 hydrogenation into methane and intensifying methane yield in biomethanation

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

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Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

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