Valorization of Camellia oleifera through integrated lignin extraction and tunable nanoparticle synthesis DOI Creative Commons

Yuping Wu,

Chengyun Deng,

Xiaolu Zhao

и другие.

AIP Advances, Год журнала: 2025, Номер 15(4)

Опубликована: Апрель 1, 2025

The high-value utilization of Camellia oleifera, a major agroforestry waste, is critical for sustainable biomass management. This study presents green integrated process efficient lignin extraction and controllable nanoparticle synthesis via acidic solvent solvent-exchange nanotechnology. Two systems were systematically optimized: HCl/1,4-dioxane achieved higher purity (71.53%–73.52%) under optimal conditions (110 °C, 75 min, 90% ratio), whereas p-TsOH/ethylene glycol low eutectic (70 65% ratio) yielded superior efficiency (27.38%–28.74%). Subsequent exchange enabled precise regulation morphology size. Solvent polarity governed structural outcomes, with acetone producing elongated porous particles (153 ± 1 nm, PDI = 0.322) tetrahydrofuran (THF) generating uniform spheres (140 0.109). FTIR zeta potential analyses revealed that tetrahydrofuran’s hydrophobic effects enhanced surface electronegativity (−37.5 mV), conferring exceptional colloidal stability (<1% size increase over 30 days). Synergistic optimization THF/water ratio (50%) concentration (0.7 mg/ml) produced ultrasmall nanoparticles (80 0.082). work elucidates the multiscale mechanism in extraction-nanostructuring establishes low-carbon pathway waste valorization. methodology demonstrates significant advancing material nanotechnology applications through biomass-derived functional nanomaterials.

Язык: Английский

Microwave-Assisted Oxidative Degradation of Lignin Catalyzed by Hydrogen Peroxide–Alkaline Ionic Liquid System DOI Open Access
Yuxin Qin, Dan Li,

S. Mahmood

и другие.

Catalysts, Год журнала: 2025, Номер 15(4), С. 367 - 367

Опубликована: Апрель 9, 2025

In recent years, various green solvents have played more and important roles in catalysis biomass studies. this work, three imidazolium anion-based alkaline ionic liquids (ILs, including [BMIM]Im, [Ch]Im, [N4222]Im) were selected to catalyze the oxidative degradation of lignin by a microwave-assisted hydrogen peroxide–alkaline liquid system for first time, which aimed promote depolymerization high-value conversion increase number alcohol hydroxyl groups reactivity lignin. The changes before after taken as primary indices. As main conditions, influence microwave exposure power, concentration, peroxide concentration on efficacy was subsequently examined that exhibited most effective performance. addition, extracted reaction solution analyzed combination with gas chromatography–mass spectrometry (GC–MS), degraded solids characterized scanning electron microscopy (SEM), ultraviolet visible (UV–Vis) spectroscopy, Fourier-transform infrared spectroscopy (FT–IR), thermogravimetric derivative (TG–DTG) methods, determined composition products, mechanism, intuitive structural lignin, thereby providing insights into extent solvents.

Язык: Английский

Процитировано

1
Elucidating and Controlling Reaction Pathways for 2-Methylfuran Aromatization Using Bifunctional Zeolite Catalysts DOI
Shengpeng Xia, Jiaqi Liang, Zhihao Wang

и другие.

ACS Sustainable Chemistry & Engineering, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

Understanding and controlling the reaction pathways is pivotal in achieving heightened selectivity for aromatics from catalytic pyrolysis of biofurans. Herein, liquid nitrogen quenching-dissolution-extraction situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) techniques were employed to elucidate mechanistic converting 2-methylfuran (MF) into aromatics. Bifunctional HZSM-5 catalysts developed regulate aromatic selectivity. Key intermediates identified conversion MF over include olefins, dimethylbenzofuran (DBF), 2-cyclopenten-1-ones (CPOs). Three possible aromatization discovered: (1) cracks olefins that polymerize aromatics; (2) oligomerizes DBF, then decarbonizes form alkylbenzenes, dominant at low temperatures; (3) forms CPOs, which deoxygenate benzene alkylbenzenes─the most significant pathway. Introducing metal oxides (Fe, Mo, Zn) zeolites alters Brønsted Lewis acid ratios, positively correlating with CPO content, resulting increased decreased coke formation. These findings can provide new insights biofuran critical issues biomass, such as rational design improved zeolite catalysts.

Язык: Английский

Процитировано

0
Multi-step pre-treatment of rice husk for fractionation of components including silica DOI Creative Commons

Sakurako Ishida,

Shinji Kudo, Shusaku Asano

и другие.

Frontiers in Chemistry, Год журнала: 2025, Номер 13

Опубликована: Янв. 23, 2025

Introduction Rice husk, a widely available agricultural by-product lignocellulosic biomass, is promising and sustainable feedstock for organic inorganic chemicals due to the rich silica content. However, its current application largely limited, with most being incinerated as waste. This study introduces novel multi-step pre-treatment process fractionate these components efficiently, enabling their comprehensive valorization. Methods The begins hydrothermal treatment, selectively extracting hemicellulose while preserving structural integrity of other components. followed by an organosolv treatment using ethanol/water mixture, optimized dissolve extract lignin effectively. Subsequently, alkaline aqueous solution under nitrogen atmosphere facilitates recovery sodium silicate, valuable industrial precursor. To ensure high-purity cellulose recovery, final step employs processing oxygen, achieving effective depolymerization removal. Results discussion Each was carefully optimized, considering parameters such temperature, solvent composition, reaction time, enhance selectivity yield. Notably, this method reduces environmental negative impact avoiding use acids utilizing renewable solvents. sequential treatments resulted in separation exceeding 97% hemicellulose, lignin, silica, leaving loss 22.8 wt%. Hemicellulose, removed fractions were 66.5, 78.1, 77.5 wt% at first, second, third treatments, respectively.

Язык: Английский

Процитировано

0
Feruloyl-CoA synthetases and feruloyl-CoA hydratase/lyases: Expression, biochemical characterisation, and generation of vanillin from ferulic acid and lignocellulosic hydrolysates DOI
Victoria Sodré, Fábio M. Squina

Methods in enzymology on CD-ROM/Methods in enzymology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0
Unlocking the Potential of Lignin-based Polyhydroxyurethanes: Insights into Kinetics, Physical Behavior, and Recyclability DOI Creative Commons

Nathan Wybo,

Antoine Duval, Luc Avérous

и другие.

Materials Today Sustainability, Год журнала: 2025, Номер unknown, С. 101117 - 101117

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
Valorization of Camellia oleifera through integrated lignin extraction and tunable nanoparticle synthesis DOI Creative Commons

Yuping Wu,

Chengyun Deng,

Xiaolu Zhao

и другие.

AIP Advances, Год журнала: 2025, Номер 15(4)

Опубликована: Апрель 1, 2025

The high-value utilization of Camellia oleifera, a major agroforestry waste, is critical for sustainable biomass management. This study presents green integrated process efficient lignin extraction and controllable nanoparticle synthesis via acidic solvent solvent-exchange nanotechnology. Two systems were systematically optimized: HCl/1,4-dioxane achieved higher purity (71.53%–73.52%) under optimal conditions (110 °C, 75 min, 90% ratio), whereas p-TsOH/ethylene glycol low eutectic (70 65% ratio) yielded superior efficiency (27.38%–28.74%). Subsequent exchange enabled precise regulation morphology size. Solvent polarity governed structural outcomes, with acetone producing elongated porous particles (153 ± 1 nm, PDI = 0.322) tetrahydrofuran (THF) generating uniform spheres (140 0.109). FTIR zeta potential analyses revealed that tetrahydrofuran’s hydrophobic effects enhanced surface electronegativity (−37.5 mV), conferring exceptional colloidal stability (<1% size increase over 30 days). Synergistic optimization THF/water ratio (50%) concentration (0.7 mg/ml) produced ultrasmall nanoparticles (80 0.082). work elucidates the multiscale mechanism in extraction-nanostructuring establishes low-carbon pathway waste valorization. methodology demonstrates significant advancing material nanotechnology applications through biomass-derived functional nanomaterials.

Язык: Английский

Процитировано

0