Metal- and ionic liquid-based photocatalysts for biodiesel production: a review

Gautam, Aparna; Khajone, Vijay B.; Bhagat, Pundlik Rambhau; Kumar, Sushil; Patle, Dipesh S.

doi:10.1007/s10311-023-01637-8

Environ Chem Lett

2023

DOI: 10.1007/s10311-023-01637-8

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Metal- and ionic liquid-based photocatalysts for biodiesel production: a review

Aparna Gautam

Vijay B. Khajone

Pundlik Rambhau Bhagat

et al.

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2024

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Cited by 10 publications

(1 citation statement)

References 109 publications

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“…However, pure HPAs generally have poor thermal stability and are easily soluble in polar solvents, making them difficult to recover and reuse when used as catalysts . In view of the characteristics of ionic liquids (ILs) and the widespread application as catalysts, if HPAs are combined with organic cations to form new HPA-based ionic liquid catalysts, they would be able to solve the above problems while retaining excellent catalytic performance of HPAs. − …”

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confidence: 99%

Phosphotungstic-Acid-Based Ionic Liquid Catalyst for Efficient Photocatalytic Oxidative Desulfurization under Visible Light

Liu,

Xun,

Yang

et al. 2024

Energy Fuels

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The modification of ionic liquids to improve the catalytic activity in the oxidative desulfurization of fuel is a research hotspot. Herein, a kind of phosphotungstic-acid-based imidazole ionic liquid [C 1 imCH 2 CH 2 COOH] 3 PW 12 O 40 ([C 1 im] 3 PW) was prepared and acted as a photocatalyst in the extractive coupled photocatalytic oxidation desulfurization (EPODS) system, which consisted of [Omim]PF 6 , H 2 O 2 , and formic acid. The structure and composition characteristics of [C 1 im] 3 PW were studied, and it exhibited excellent photocatalytic performance under visible light. The desulfurization of dibenzothiophene achieved 99.8% in 30 min under room temperature and atmospheric pressure. The reusability, anti-interference ability, desulfurization reaction process, and possible mechanism of the EPODS system were studied.

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confidence: 99%

Phosphotungstic-Acid-Based Ionic Liquid Catalyst for Efficient Photocatalytic Oxidative Desulfurization under Visible Light

Liu,

Xun,

Yang

et al. 2024

Energy Fuels

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Boosting Photocatalytic Upcycling of Liquid Biomass into Biodiesel via Microenvironment Modulation

He,

Zhang,

Zhou

et al. 2024

Advanced Energy Materials

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The rational design of a photocatalyst and its microenvironmental modulation is crucial in the heterogeneous photocatalysis process, yet relevant research on photocatalytic biodiesel synthesis is not explored. Herein, based on the prediction of density functional theory (DFT) calculations, highly efficient ternary biocompatible montmorillonite (Mt) nanocomposites of S‐scheme heterojunction photocatalysts (g‐C3N4‐TiO2@Mt, CTM) are successfully rationally designed. By modulating the microenvironment in photocatalytic biodiesel production, CTM‐2 demonstrates exceptional catalytic performance and stability, achieving a record‐breaking biodiesel yield of 98.5%. Through ex/in situ X‐ray photoelectron spectroscopy (XPS), X‐ray absorption near‐edge spectroscopy (XANES), and theoretical calculations, the formation of S‐scheme heterojunction is revealed, which can generate an interface electric field (IEF) that provides an intrinsic driving force for carrier migration and enhances surface positivity. This boosts the enrichment effect of electronegative oleic acid (OA) carboxyl molecules, thus greatly enriching the substrate concentration and improving the reaction microenvironment. Moreover, in situ fourier transform infrared spectrometer (FT‐IR)/Raman together with electron paramagnetic resonance (EPR) further confirm the formation of key intermediates CH3O• and ester carbonyl (C═O), and DFT calculations provide a key reference for the photocatalytic reaction pathway, of which CTM‐2 is determined to be capable of significantly reducing the energy barrier of rate‐determining step.

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Sustainable Production of Biofuels from Biomass Feedstocks Using Modified Montmorillonite Catalysts

Ban,

Wu,

Sun

et al. 2024

ChemSusChem

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The rampant exploitation of fossil fuels has led to the significant energy scarcity and environmental disruption, affecting the sound momentum of development and progress of human civilization. To build a closed‐loop anthropogenic carbon cycle, development of biofuels employing sustainable biomass feedstocks stands at the forefront of advancing carbon neutrality, yet its widespread adoption is mainly hampered by the high production costs. Montmorillonite, however, has garnered considerable attention serving as an efficient heterogeneous catalyst of ideal economic feasibility for biofuel production, primarily due to its affordability, accessibility, stability, and excellent plasticity. Up to now, nevertheless, it has merely received finite concerns and interests in production of various biofuels using montmorillonite‐based catalysts. There is no timely and comprehensive review that addresses this latest relevant progress. This review fills the gap by providing a systematically review and summary in controllable synthesis, performance enhancement, and applications related to different kinds of biofuels including biodiesel, biohydrogenated diesel, levulinate, γ‐valerolactone, 5‐ethoxymethylfurfural, gaseous biofuels (CO, H2), and cycloalkane, by using montmorillonite catalysts and its modified forms. Particularly, this review critically depicts the design strategies for montmorillonite, illustrates the relevant reaction mechanisms, and assesses their economic viability, realizing sustainable biofuels production via efficient biomass valorization.

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Metal- and ionic liquid-based photocatalysts for biodiesel production: a review

Cited by 10 publications

References 109 publications

Phosphotungstic-Acid-Based Ionic Liquid Catalyst for Efficient Photocatalytic Oxidative Desulfurization under Visible Light

Phosphotungstic-Acid-Based Ionic Liquid Catalyst for Efficient Photocatalytic Oxidative Desulfurization under Visible Light

Boosting Photocatalytic Upcycling of Liquid Biomass into Biodiesel via Microenvironment Modulation

Sustainable Production of Biofuels from Biomass Feedstocks Using Modified Montmorillonite Catalysts

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