Article
Chemistry, Physical
Lukasz Czieszowic, Beata Orlinska, Dawid Lisicki, Ewa Pankalla
Summary: An efficient method for the synthesis of 2-ethylhexanoic acid using oxygen or air in the presence of N-hydroxyphthalimide as a catalyst in isobutanol solvent has been developed. The method achieved a high selectivity of >99% for 2-ethylhexanoic acid and showed potential for implementation in industry due to its green oxidation process and mild reaction conditions. The use of isobutanol as a solvent is crucial for potential producers to utilize less valuable alcohol.
Review
Chemistry, Physical
Md Sajjadur Rahman, Ranen Roy, Balawanthrao Jadhav, Md Nayeem Hossain, Mohammad A. Halim, Douglas E. Raynie
Summary: Deep eutectic solvents (DESs) are versatile alternatives in the design of greener chemicals, with therapeutic DES (THEDES) and amino acid-based DES (AADES) being reviewed as emerging and unconventional types. THEDES are primarily developed to enhance drug efficacy, while AADES have various applications in pharmaceuticals and other areas.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Thermodynamics
Zeyun Wu, Yiyang Zhang, Xiaofan Zhao, Hongyan Wang, Shuiqing Li
Summary: The introduction of SiO2 coating significantly improves the crystallinity and fluorescence intensity of YAlO3:Nd3+ nanophosphors. The best timing for coating injection is when small particles have already been formed but not heavily aggregated. A coating ratio of 1:1 of Si:(Y + Nd) produces the best crystallinity and strongest fluorescence intensity.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Chemistry, Applied
Gael Huet, Caroline Hadad, Jose M. Gonzalez-Dominguez, Matthieu Courty, Arash Jamali, Dominique Cailleu, Albert Nguyen van Nhien
Summary: This study compares the impact of different pretreatment methods on the efficiency of chitin deacetylation from different sources, showing that IL pretreatment outperforms DES pretreatment in some aspects, ultimately validating that proper sources and processing methods can achieve high quality and highly functionalizable chitosan.
CARBOHYDRATE POLYMERS
(2021)
Article
Engineering, Environmental
Boyou Hou, Yanning Wang, Shi Liu, Bingjian Li, Liping Huang, Jinchun Li
Summary: A novel phosphaphenanthren-containing flame-retardant plasticizer (APGOL) derived from l-lactic acid was synthesized and characterized in this study. The APGOL showed enhanced flame retardancy and accelerated crystallization rate of PLA, resulting in higher tensile strength and modulus. This research provides a reference for the development of renewable flame-retardant plasticizers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Tirath Raj, K. Chandrasekhar, Jungsu Park, Sunita Varjani, Pooja Sharma, Deepak Kumar, Jeong-Jun Yoon, Ashok Pandey, Sang-Hyoun Kim
Summary: The leaching of cobalt and nickel into water streams has negative environmental and human health impacts. This study focuses on developing cost-effective and environmentally friendly technologies for recovering these heavy metals. Two new fatty acid-based ionic liquids were synthesized and successfully used to extract cobalt and nickel from aqueous solutions.
Article
Chemistry, Analytical
Mohammad Reza Afshar Mogaddam, Mir Ali Farajzadeh, Mustafa Tuzen, Abolghasem Jouyban, Jalil Khandaghi
Summary: An organic solvent-free extraction method using deep eutectic solvent was developed for the extraction of synthetic phenolic antioxidants from oil samples. The method showed low limits of detection and quantification, high extraction recovery and enrichment factor, as well as good precision. It was successfully applied for quantification of antioxidants in edible oil samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Fei Chen, Jiaming Liang, Fan Wang, Weizhe Gao, Yasuharu Kugue, Yingluo He, Xiaoyu Guo, Guohui Yang, Guangbo Liu, Jinhu Wu, Prasert Reubroycharoen, Tharapong Vitidsant, Noritatsu Tsubaki
Summary: Metallic (Cu/ZnO/Al2O3) and metal oxide (Fe2O3, Co3O4, NiO) catalysts were prepared using a facile alcohol solvent assisted method. This method allows for easy operation at room temperature, atmospheric pressure, and a low oxalic acid/M2+ molar ratio, preventing the release of flammable gases. The catalyst prepared using 1-propanol as solvent showed high catalytic activity for low-temperature methanol synthesis due to its unique properties. This work provides a promising strategy for large-scale fabrication of catalysts and a self-catalysis reaction pathway for low temperature methanol synthesis.
Article
Chemistry, Multidisciplinary
Sonia Mancipe, Juan-Carlos Castillo, Maria H. Brijaldo, Viviana P. Lopez, Hugo Rojas, Mario A. Macias, Jaime Portilla, Gustavo P. Romanelli, Jose J. Martinez, Rafael Luque
Summary: This study describes the use of boric acid deposited on hydrotalcite as a catalyst for the Knoevenagel reaction between HMF derivatives and active methylene compounds. The catalyst showed high activity, good selectivity, and could be reused multiple times without significant loss of activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Antonio V. Herrera-Herrera, Ruth Rodriguez-Ramos, Alvaro Santana-Mayor, Barbara Socas-Rodriguez, Miguel Angel Rodriguez-Delgado
Summary: A vortex-assisted liquid-liquid microextraction method was applied to analyze phthalate esters and adipate in kombucha using a hydrophobic deep eutectic solvent. The method was validated and satisfactory results were obtained. The analysis of kombucha samples revealed the presence of various phthalate esters, with higher concentrations found in samples bottled in food-grade glass containers. This is the first study to analyze phthalates and adipates in kombucha.
Article
Chemistry, Physical
Cheng Zong, Ruizhuan Wang, Hao Qin, Lifang Chen, Zhiwen Qi
Summary: This study proposes an intensified synthesis of glycerol monocaprylin using an ionic liquid as a dual solvent and catalyst. By selecting an ionic liquid with good solubility and temperature-responsive behavior, the selectivity, separation, and recycling of the product can be improved. The optimized reaction conditions achieve high conversion and yield. Furthermore, the ionic liquid maintains its catalytic performance after multiple cycles.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Guofeng Ye, Siqi Huo, Cheng Wang, Qiu Shi, Zhitian Liu, Hao Wang
Summary: This study successfully synthesized a bio-based flame retardant named PF with green and facile method, significantly improving the flame retardancy of PLA by reducing heat release and generating compact char layer.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Chemistry, Analytical
Yuanfei Liu, Sunqi Shang, Wanjiao Wei, Yuefei Zhang, Wei Chen, Sheng Tang
Summary: In this study, an IL modified COF bonded silica composite material (IL-COF@SiO2) was successfully synthesized using a deep eutectic solvent as the reaction medium instead of organic solvent. The IL-COF@SiO2 composite material combines the separation ability of COF and the mass transfer function of porous silica. The introduction of IL provides better separation performance, demonstrating potential as a versatile liquid chromatographic separation material.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Silvana De Iuliis, Roberto Donde, Igor Altman
Summary: Controlling synthesis conditions significantly affects the properties of nanoparticles, and understanding the thermal status in flames is crucial for tuning nanoparticles with specific properties. This study focuses on analyzing light emission from nanoparticles during synthesis and under laser irradiation to provide insights into the temperature plateau observed at low laser fluence, which is attributed to nonisothermality with partially solidified particles at the melting point and much hotter particles in the flame spray.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Xin-Long Sha, Pengyu Fei, Binxin Shen, Jue Chen, Zongtang Liu, Yufeng Sun, Jia-Tao Miao
Summary: The synthesis of high-performance biomass benzoxazine resin using a solvent-free method is important for environmental sustainability and industrial application. Biobased eugenol and magnolol with allyl cross-linking sites, along with 3-aminophenylacetylene with alkynyl cross-linking sites, were used to prepare two biomass benzoxazine monomers E-apa and M-apa. The cured resins poly(E-apa) and poly(M-apa) exhibited superior properties compared to typical biobased heat-resistant benzoxazine resins, with higher glass-transition temperature (Tg) and thermal decomposition temperature (Tdi), better mechanical properties, and improved flame retardancy. These enhanced properties are attributed to the combination of multiple cross-linking sites and rigid phenol sources in poly(M-apa).
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Thermodynamics
Qian Huang, Shuiqing Li, Yachan Shao, Yingqi Zhao, Qiang Yao
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Thermodynamics
Qi Gao, Shuiqing Li, Yingqi Zhao, Qiang Yao
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Thermodynamics
Yihua Ren, Jili Wei, Shuiqing Li
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Thermodynamics
Yihua Ren, Yiyang Zhang, Shuiqing Li
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Thermodynamics
Qi Gao, Shuiqing Li, Yang Xu, Jianmin Liu
COMBUSTION AND FLAME
(2019)
Article
Thermodynamics
Yong Tang, Qiang Yao, Wei Cui, Jiankun Zhuo, Shuiqing Li
COMBUSTION SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Chemical
Hongsheng Chen, Wenwei Liu, Shuiqing Li
Article
Thermodynamics
Yihua Ren, Wei Cui, Heinz Pitsch, Shuiqing Li
COMBUSTION AND FLAME
(2020)
Article
Thermodynamics
Jinguo Sun, Yihua Ren, Yong Tang, Shuiqing Li
Summary: This study investigates the extinction characteristics of premixed stagnation flames (PSFs) under different conditions and the impact of flame stability by air flow pulsations. Through experiments and numerical simulations, it is revealed that wall heat flux and air pulsations have significant effects on the extinction stretch rate and flame stability in PSFs.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Yihua Ren, Ke Ran, Stephan Kruse, Joachim Mayer, Heinz Pitsch
Summary: Core-shell carbon metal-oxide nanocomposites were synthesized in a counterflow burner with independent control of precursor loading rate and fuel mass fraction. In-situ laser diagnostics and TEM were used to investigate the formation mechanism, revealing two steps in the growth process. By adjusting precursor concentration and fuel mass fraction, the core size of metal oxides and carbonaceous layer thickness can be tailored independently.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Energy & Fuels
Yihua Ren, Jinzhi Cai, Heinz Pitsch
Summary: Flame spray pyrolysis is a promising technology for synthesizing metal-oxide nanomaterials, but numerical simulation faces challenges. A single-droplet model has been developed to describe multicomponent droplet combustion and guide precursor and process design.
Article
Chemistry, Physical
Yihua Ren, Yiyang Zhang, Qian Mao, Heinz Pitsch
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Thermodynamics
Yihua Ren, Albrecht Kreischer, Florence Cameron, Heinz Pitsch
Summary: A new spectral correction method is proposed to eliminate errors in elemental ratio measurements in laser-induced plasma. The method allows for quantitative measurement of mixture fractions in flames after correction.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Physical
Dingyu Hou, Qian Mao, Yihua Ren, Kai H. Luo
Summary: Flame aerosol synthesis is a promising method for producing carbon-metal oxide nanocomposites, but the formation and growth mechanisms of such materials are not well understood. In this study, reactive force-field molecular dynamics simulations were used to gain atomic insights into the initial stage of carbon coating on titania nanoparticles. It was found that the optimal temperature range for carbon coating is below 1200 K, and at higher temperatures, hydrocarbons tend to form larger carbonaceous species instead of coating onto the particle surface.
Article
Chemistry, Physical
Maximilian Hellmuth, Bingjie Chen, Chaimae Bariki, Liming Cai, Florence Cameron, Alina Wildenberg, Can Huang, Sebastian Faller, Yihua Ren, Joachim Beeckmann, Kai Leonhard, Karl Alexander Heufer, Nils Hansen, Heinz Pitsch
Summary: Bio-hybrid fuels, such as heterocyclic acetals 1,3-dioxane and 1,3-dioxolane, show promise for achieving a carbon-neutral and low-emission future in transportation. Comprehensive experimental and numerical investigations were conducted to understand the combustion chemistry and pollutant formation of these fuels. The results revealed differences in reactivity and pollutant formation between 1,3-dioxane and 1,3-dioxolane, despite their similar molecular structures.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)