FUEL
·
2020
·
IF 5.578
Wei Liu,Tenghui Li,Guojia Yu,Jiangang Wang,Zhiyong Zhou,Zhongqi Ren
Four dual-acidic deep eutectic solvents (DESs) were synthesized and investigated in an oxidative desulfurization (ODS) system using hydrogen peroxide as oxidant. l -Pyroglutamic acid/trifluoracetic acid ( l -Pyro/TFA) was further investigated as the extractant and catalyst owing to its excellent properties for removing aromatic sulfur compounds. Hydrogen bond formation by l -Pyro/TFA was confirmed using 1 H NMR and infrared spectra. The factors affecting the desulfurization efficiency, such as the DES/model oil volume ratio (V DES /V Oil ), reaction temperature, and H 2 O 2 /dibenzothiophene (DBT) molar ratio (n(H 2 O 2 )/n(DBT)), were explored. The sulfur removal rates of DBT, 4,6-dimethyldibenzothiophene, and benzothiophene were up to 99.7%, 99.6%, and 99.2%, respectively, under the optimum conditions, which were V DES /V oil = 1:20, n(H 2 O 2 )/n(DBT) = 3, and T = 60 °C. The ODS reaction followed first order kinetics through dynamic analysis. Furthermore, the desulfurization efficiency reached 98% after DES regeneration, achieved by simply washing with ultrapure water.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yiting Lei,Yulong Ma,Yonggang Sun,Liqiong Wang,Yingbo Zhu,Jinpeng Wei,Bolong Zhao,Li Zhu
Lignin, as a kind of biomacromolecule, plays a crucial role in the development of renewable energy sources. However, achieving excellent catalytic efficiency and selectivity towards expected products over a single catalytic system remains a significant challenge. The adjustment of acidic sites is an effective strategy to enhance hydrodeoxygenation (HDO) activity and product selectivity. This strategy facilitates charge transfer and activates substrate migration with the catalyst. Therefore, it is necessary to understand the relationship between the structure and activity of acid sites in catalysts, and construct synergistic Brønsted-Lewis sites. In this study, the incorporation of Ni@NC active phase derived from metal-organic frameworks (MOFs) significantly enhanced both the strength and quantity of Lewis acid sites (LASs) in the Ni@NC-HZSM-5 composite catalyst. This enhancement facilitated the cleavage of C Ar –OCH 3 bonds in lignin oil. Furthermore, the abundant Brønsted acid sites (BASs) present in HZSM-5 markedly promoted the cleavage of C Ar –OH bonds. Efficient conversion of real lignin oil was achieved through the synergistic action of the dual-acid sites, resulting in the conversion of 98.50 % and the C 6+ cycloalkane selectivity of 95.05 %. This study proposed a novel approach to the efficient upgrading of lignin-based bio-oil into alternative fuels using heterogeneous catalysts.
研究领域:
生物化学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2021
·Vol. 97
·期 1
·240-253
·
IF 3.174
Zhihang Huang,Songyuan Hao,Hong Yuan
BACKGROUND A novel double acid site solid catalyst (Al-OCS-0.1) having an ordered mesoporous structure was synthesized by grafting sulfonic acid groups on an oxidized ordered mesoporous carbon (OOMC) support and loading 10% Al 2 (SO 4 ) 3 . RESULT Assessments using Field emission scanning electron microscopy, Transmission electron microscopy and X-ray diffraction showed that the OMC structure remained unchanged after the chemical modification and Al 2 (SO 4 ) 3 loading. The Brunauer–Emmett–Teller surface area and average pore size of Al-OCS-0.1 decreased to 181 m 2 g −1 and 7.1 nm after loading Al 2 (SO 4 ) 3 , respectively. Ammonia temperature-programmed desorption (NH 3 -TPD) and Pyridine adsorption infrared spectroscopy (Py-IR) demonstrated that Al-OCS-0.1 had abundant Brønsted and Lewis acid sites. The ammonia desorption of Al-OCS-0.1 increased from 2.0 to 7.2 mmol g −1 after loading Al 2 (SO 4 ) 3 . CONCLUSION The Al-OCS-0.1 was used to catalyze the synthesis of ethyl levulinate from cellulose in ethanol and gave an extremely high yield of 50.8 mol% after 5 h at 200 °C. © 2021 Society of Chemical Industry (SCI).
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR BIOSCIENCE
·
2016
·Vol. 17
·期 3
·1600227
·
IF 3.68
Chunran Wang,Jinze Wang,Xiaofei Chen,Xu Zheng,Zhigang Xie,Li Chen,Xuesi Chen
Herein, a kind of dual acid-sensitive nanoparticles based on monomethoxy poly(ethylene glycol)-imine-β-cyclodextrin is constructed by a facile phenylboronic acid-cross-linked way. The data of dynamic light scattering and transmission electron microscope reveal the cross-linked nanoparticles have improved stability. The cross-linked nanoparticles could easily self-assemble and load the anticancer drug at neutral pH condition. However, when the drug-loaded nanoparticles are delivered to extracellular tumor sites (pH ≈6.8), the surface of the nanoparticles would be amino positively charged and easily internalized by tumor cell due to the cleavage of the acid-labile benzoic–imine. Subsequently, with the acidity in subcellular compartments significantly increasing (such as the endosome pH ≈5.3), the loaded drug would fast release from the endocytosis carriers due to the hydrolysis of boronate ester. These features suggest that these dual acid-sensitive cross-linked nanoparticles not only possess excellent biocompatibility but also can efficiently load and deliver anticancer drug into tumor cells to enhance the inhibition of cellular proliferation, outlining a favorable platform as drug carriers.
研究领域:
药剂学
·
肿瘤学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Jian He,Zhaozhuo Yu,Hongguo Wu,Hu Li,Song Yang
Effective synthesis of aromatic compounds from renewable biomass is highly important yet challenging. p -Cymene is an attractive aromatic compound with various promising applications in the manufacture of fine chemicals. In this study, a novel and effective catalytic system based on mesoporous tin phosphate (M-SnPO) with Lewis-Brønsted dual acidity was developed for the fast synthesis of p -cymene from the cyclodehydration of bio-based citral. Up to 78.5% yield of p -cymene was achieved from the cyclodehydration of citral at 180 °C within only 0.5 h, superior to the results reported for benchmark homogeneous acid catalysts. Characterization of as-prepared M-SnPO catalyst via various techniques indicates that the synergic effect of Lewis and Brønsted acidic sites, large pore-sized structure, and high surface area are responsible for its remarkable catalytic performance. In addition, the effectiveness of the M-SnPO catalyst could be almost sustained over multiple cycles without significant loss. The work herein is the first example of developing a Lewis-Brønsted dual acidic heterogeneous catalyst for the fast synthesis of p -cymene from the cyclodehydration of citral.
研究领域:
催化化学
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生物质转化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Fanhao Meng,Xiaoyu Dong,Haiyang Wu,Zhiyuan Wu,Hui Dou,Xiaogang Zhang
Proton batteries are considered promising due to their high-power output, cost-effectiveness, and safety. However, they also face challenges such as low voltage, limited capacity, and poor cycle stability. To address these challenges, a dual-acid quasi-solid-state electrolyte (SSAE) is developed by combining H 2 SiO 3 with H 2 SO 4 . This electrolyte has the decomposition voltage of 2.15 V and ultra-high conductivity of 95 mS cm⁻¹ (1.5 mS cm⁻¹ at −70 °C). Leveraging this high decomposition voltage, the specific capacity of MoO 3 is successfully enhanced to 1.74 times than its original value at a current density of 5 A g −1 by harnessing the hydrogen evolution/oxidation reaction (HER/HOR) of lattice hydrogen (H· ad,s ) in MoO 3 at low potentials, which is typically regarded as a significant factor to suppress the gas evolution. Notably, the voltage achieved a record-breaking 1.8 V in the Prussian Blue Analog //MoO 3 system at room temperature. The full cell consisting of HVFe-PBA (pre-protonated vanadium hexacyanoferrate)//SSAE//MoO 3 exhibited outstanding electrochemical performance at both room temperature and low temperatures. As a proof-of-concept, a pouch cell is assembled with an energy density of 72.3 Wh kg −1 , and even it maintained an energy density of 40.7 Wh kg −1 at −60 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2015
·Vol. 4
·期 1
·104-114
·
IF 3.831
Chunran Wang,Xiaofei Chen,Xuemei Yao,Li Chen,Xuesi Chen
Considering the specific pH gradients of tumour microenvironments, a dual acid-responsive drug delivery system, which can respond to the tumor extracellular and intercellular pH stimuli, has been fabricated via simple host–guest recognition. Firstly, we synthesise 2,4,6-trimethoxybenzaldehyde modified dextran (Dex-TMBA) and mPEG-imine-β-cyclodextrin (PIC), respectively. And then, through the host–guest recognition between the cyclodextrin (CD) of PIC and the benzene ring of Dex-TMBA, a kind of dual acid-responsive supramolecular drug delivery system can be fabricated. Under neutral pH conditions, anticancer drugs can be loaded by forming supramolecular nanoparticles via the host–guest recognition. While, at tumor extracellular pH (∼6.8), the acid-labile benzoic–imine of PIC cleaves and the nanoparticles are amino positively charged to facilitate cell internalization. Subsequently, due to the hydrolysis of acetal bonds in Dex-TMBA under significantly increased acidity in subcellular compartments such as the endosomes (∼5.3), the loaded doxorubicin releases from the endocytosed drug delivery. This dual acid-responsive nanoparticles can efficiently load and release drugs, acting as drug delivery systems for enhancing anticancer efficiency.
研究领域:
药剂学
·
生物医学工程
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
Petroleum Science
·
2024
·
IF 6
Ran Liu,Chang Wang,Qiang Yang,Jing-Ran Yang,Chen Liu,Liberty Mguni,Xin-Ying Liu,Ya-Li Yao,Fa-Tang Li
The development of highly active functionalized ionic liquids (ILs) as both extractants and catalysts for use in achieving deep desulfurization continues to pose challenges. In this study, a highly efficient oxidative desulfurization system was constructed, composed of dual-acidic ionic liquids (DILs) and H 2 O 2 -AcOH. The investigation results of four DILs prepared from different metal chlorides ([HSO 3 C 3 NEt 3 ]Cl-MnCl n , MnCl n = AlCl 3 , ZnCl 2 , CuCl 2 , FeCl 3 ) in oxidative desulfurization showed that [HSO 3 C 3 NEt 3 ]Cl-AlCl 3 had an outstanding catalytic effect and significantly promoted the oxidation of sulfides. With a 0.2 g [HSO 3 C 3 NEt 3 ]Cl-AlCl 3 , the removal rate of dibenzothiophene (DBT) reached 100% in 10 mL model oil under mild conditions at 55 °C for 20 min. The key is its ability to induce the dismutation of superoxide anions (•O 2 − ), which facilitates the generation of singlet oxygen ( 1 O 2 ). The efficient oxidation of DBT is accomplished through a predominantly 1 O 2 -mediated non-radical mechanism. [HSO 3 C 3 NEt 3 ]Cl-AlCl 3 serves as a favorable medium for contact to be made between 1 O 2 and sulfides, which indicates an efficient catalytic-adsorption synergy.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Jianming Pan,Yanli Mao,Heping Gao,Qingang Xiong,Fengxian Qiu,Tao Zhang,Xiangheng Niu
Herein we reported a simple and novel synthetic strategy for the fabrication of two kinds of hydrophobic polymer foam catalysts (i.e. Cr 3+ -HPFs-1-H + and HPFs-1-H + ) with hierarchical porous structure, inhomogeneous acidic composition and Lewis–Brønsted double acid sites distributed on the surface, which was used to one-pot conversion of carbohydrate (such as cellulose , glucose and fructose) to a key chemical platform (i.e. 5-hydroxymethylfurfural, HMF). The water-in-oil (W/O) high internal phase emulsions (HIPEs), stabilized by both Span 80 and acidic prepolymers as analogous particles offered the acidic actives, were used as the template for simultaneous polymerization of oil phase in the presence of divinylbenzene (DVB) and styrene (St). After subsequent ion-exchange process, Lewis and Brønsted acid sites derived from exchanged Cr 3+ and H + ion were both fixed on the surface of cell of the catalysts. The HPFs-1-H + and Cr 3+ -HPFs-1-H + had similar hierarchical porous, hydrophobic surface and acid sites (HPFs-1-H + with macropores ranging from 0.1 μm to 20 μm, uniform mesopores in 14.4 nm, water contact angle of 122° and 0.614 mmol g −1 of Brønsted acid sites, as well as Cr 3+ -HPFs-1-H + with macropores ranging from 0.1 μm to 20 μm, uniform mesopores in 13.3 nm, water contact angle of 136° and 0.638 mmol g −1 of Lewis–Brønsted acid sites). It was confirmed that Lewis acid sites of catalyst had a slight influence on the HMF yield of fructose came from the function of Brønsted acid sites, and Lewis acid sites were in favor of improving the HMF yield from cellulose and glucose. This work opens up a simple and novel route to synthesize multifunctional polymeric catalysts for efficient one-pot conversion of carbohydrate to HMF.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 16
·期 1
·103
·
IF 5
Qiao Zhou,Yuanyuan Zhao,Yafei Shi,Rongrong Zheng,Liying Guo
Utilizing triethylenediamine (DA), 1,3-propanesultone (PS), whose ring opens during the formation of the dizwiterion-intermediate DA-2PS, and the metal chlorides XCly, where X = Sn(IV), Zn(II),Al(III), Fe(III) and Mn(II), are used for the synthesis of five kinds of acidic metal-based functionalized ionic liquid catalysts ([DA-2PS][XCly]2). Their chemical structures, thermal stability and dual acidic active site were analyzed. We investigated the performance of [DA-2PS][XCly]2in catalyzing the esterification reaction between 2,5-furandicarboxylic acid (FDCA) and ethylene glycol (EG) to synthesize poly (ethylene 2,5-furandicarboxylate)(PEF). Among the catalysts tested, [DA-2PS][SnCl5]2exhibited the best catalytic performance under identical process parameters, and the optimal catalyst dosage was determined to be 0.05 mol% based on FDCA. The optimal conditions for the reaction were predicted using response surface methodology: a feed ratio of EG:FDCA = 1.96:1, an esterification temperature of 219.86 °C, a polycondensation temperature of 240.04 °C and a polycondensation time of 6.3 h, with a intrinsic viscosity of 0.67 dL·g−1. The resulting PEF was experimentally verified to exhibit an intrinsic viscosity of 0.68 dL·g−1and a number average molecular weight of 28,820 g·mol−1. Finally, the structure and thermal properties of PEF were characterized. The results confirmed that PEF possessed the correct structure, exhibited high thermal stability and demonstrated excellent thermal properties.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Zhi Qi,Chunlai Liu,Peihang Shen,Zelong Liu,De Sun,Jianglei Hu,Yibo Zhang
With the accelerated consumption of fossil fuels driven by societal development and population growth, acid-catalyzed biodiesel serves as an eco-friendly alternative that effectively enhances reaction processes and reduces pollutant emissions. This study developed a novel dual-acid catalyst, H 3 PW 12 O 40 (PW) and titanium-incorporated phenolic resin (PR) functionalized mesoporous silica (PW/Ti-SiO 2 -PR), via a one-pot hydrothermal method for efficient biodiesel production via oleic acid esterification. The composite’s structure, acidity, and hydrophobicity were systematically characterized using FT-IR, XRD, N 2 physisorption, SEM/TEM, and XPS. Results confirmed the successful integration of PW and Ti into the silica framework, creating synergistic Brønsted (PW) and Lewis (Ti 4 + ) acid sites. The inclusion of low-molecular-weight PR enhanced mesopore formation and hydrophobicity, critical for inhibiting water-induced deactivation. The optimized 0.2PW/Ti0.05-SiO 2 -PR0.25 catalyst achieved 95.2 % methyl oleate yield at 100 °C within 8 h, outperforming conventional solid acids. Notably, the catalyst retained > 90 % activity over five cycles without PW leaching or structural degradation, demonstrating exceptional stability. This work highlights the strategic design of hydrophobic, dual-acid mesoporous catalysts for sustainable biodiesel synthesis.
研究领域:
催化化学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Jindong Wang,Wenzhi Li,Huizhen Wang,Qiaozhi Ma,Song Li,Hou-min Chang,Hasan Jameel
In this study, a novel catalyst, S 2 O 8 2− -KNO 3 /TiO 2 , which has active acidic and basic sites, was prepared and used in lignin hydrocracking with a co-catalyst, Ru/C. Ru/C is an efficient hydrogenation catalyst and S 2 O 8 2− -KNO 3 /TiO 2 is a dual catalyst, which could efficiently degrade lignin. This catalytic hydrogenation system can reduce solid products to less than 1%, while giving a high liquid product yield of 93%. Catalytic hydrocracking of kraft lignin at 320 °C for 6 h gave 93% liquid product with 0.5% solid product. Most of this liquid product was soluble in petroleum ether (60% of 93%), which is a clear liquid and comprises mainly of monomeric and dimeric degradation products . These results demonstrated that the combination of the two catalysts is an efficient catalyst for liquefaction of lignin, with little char formation (∼1%). This concept has the potential to produce valuable chemicals and fuels from lignin under moderate conditions.
研究领域:
化学工程
·
可再生资源利用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）