Journal of Environmental Chemical Engineering
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2025
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IF 7.2
YiRong Yao,Bing Xing,Jianbing Chen,YanLun Ren,YuJia Ma,Ying Zhang,Li Zhang
This study proposes an advanced method to tackle CO 2 emissions by enhancing solid acid catalysts, aiming to reduce the high energy consumption and low economic efficiency typically associated with chemical absorption processes. The research involves modifying commercial HZSM-5 zeolites through Cu ion exchange, with the optimal performance observed at a Cu ion content of 2.86 % and a Cu salt concentration of 0.2 M. This modification significantly minimizes the loss of copper ions—a common issue in the impregnation method—resulting in a 76.62 % reduction in the loss of active components. To further improve CO 2 gas-liquid mass transfer, mesoporous MCM-41 zeolites were introduced. Experimental results demonstrate that, at a regeneration temperature of 86°C and a mass ratio of 2:1 for HZSM-5 to MCM-41, the combined catalyst achieves a 61.28 % reduction in relative heat duty compared to the blank sample. Moreover, the energy consumption is 12.33 % and 16.45 % lower than that of HZSM-5 and MCM-41 used individually. Characterization analysis reveals that, under comparable acidic active site densities, catalysts with superior physical pore structures exhibit enhanced catalytic performance. The introduction of mesoporous structures notably improves the bidirectional mass transfer efficiency between carbamate macromolecules and CO 2 molecules. This work successfully demonstrates the synergistic effect of combining Cu ion-modified HZSM-5 zeolites with mesoporous MCM-41, leveraging the abundant active sites of HZSM-5 while harnessing the enhanced mass transfer properties of MCM-41.
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高影响因子
ANTI-CANCER DRUGS
·
2025
·
IF 2.2
Luo Kairan,Hu Wenbin
Intelligent hydrogels are promising in constructing scaffolds for the controlled delivery of drugs. Here, a dual thermo- and pH-responsive hydrogel called PCG [poly ( N -isopropyl acrylamide-co-itaconic acid)/chitosan/glycerophosphate (PNI/CS/GP)] was established as the carrier of 5-fluorouracil (5-FU) for triple-negative breast cancer (TNBC) treatment. The PCG hydrogel was fabricated by blending synthesized [poly ( N -isopropyl acrylamide-co-itaconic acid), pNIAAm-co-IA, PNI] with CS in the presence of GP as a crosslinking agent. The interaction between PCG hydrogel compositions was characterized by Fourier transforms infrared, NMR spectroscopy, and scanning electron microscopy. The PCG hydrogel presented an interconnected and porous structure with similar pore size, rapid swelling/deswelling rate in response to both temperature and pH change, and biocompatibility, upon which it was proposed as a great drug carrier. 5-FU had a dual thermo- and pH-responsive controlled release behavior from the PCG hydrogel and displayed an accelerated release rate in an acidic pH environment than in a neutral pH condition. The application of 5-FU-loaded PCG hydrogel exhibited a more promoted anticancer activity than 5-FU against the growth of TNBC cells both in vitro and in vivo . The outcomes suggested that the PCG hydrogel could be an excellent platform for local drug-delivery systems in the clinical therapy of TNBC.
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PubMed
高影响因子
LANGMUIR
·
2024
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IF 3.7
Yongzhi Xiong,Jianchun Jiang,Yajun Liu,Xialin Ji,Changzhou Chen,Kui Wang
The electrooxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA) demonstrated its unique superiority, not only in reducing overpotential and improving energy conversion efficiency for green hydrogen production but also in utilizing abundant biomass resources and producing high-value-added chemicals. However, designing highly efficient electrocatalysts for HMF electrooxidation (HMF-EOR) with low cost and high performance for large-scale production remained a huge challenge. Herein, we introduced an easy one-step activation process to produce P-doped porous biochar loaded with multiple crystal surfaces exposed to CoP2O6 catalysts (CoP2O6@PC), which exhibited outstanding electrooxidation performance. To achieve a current density of 50 mA cm–2, only a low overpotential of 200 mV was needed for the electrooxidation of HMF in 1.0 M KOH + 10 mM HMF. This performance far surpassed that of other similar materials. CoP2O6@PC exhibited outstanding HMF-EOR performance with high conversion (nearly 100%), selectivity (97.1%), faradaic efficiency (95.3%), and robust stability. This work represents a promising strategy to fabricate macroscale and low-cost HMF-EOR electrocatalysts and achieve potential industrial applications of HMF-EOR.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xuan Gao,Zhihui Li,Shuxing Zhang,Dongsheng Zhang,Xinqiang Zhao,Baoquan Zhang,Yanji Wang
Developing cost-effective and inherently safe methods for accelerating the sustainable production of value-added chemicals from biomass presents a promising solution to the current energy crisis. This study introduces heterogeneous copper species anchored on a γ-Al 2 O 3 catalyst (Cu/γ-Al 2 O 3 ) with high dispersibility and small Cu particle size, synthesized via a straightforward incipient-wetness impregnation method. This method facilitates the selective anaerobic dehydrogenation of 5-hydroxymethylfurfural (HMF) into 2,5-diformylfuran (DFF) in the absence of any oxidant or hydrogen acceptor. An HMF conversion of 69.8 % and a DFF yield of 44.9 % were attained at 130 °C over a 12-h period. Extensive characterizations were conducted to elucidate the correlation between the catalyst’s structure and its dehydrogenation activity. The findings indicated that strong L-acid sites, elevated Cu dispersions, small Cu particle size and an increased number of Cu + active sites were conducive to enhanced dehydrogenation reactivity. The Cu/γ-Al 2 O 3 catalyst demonstrated superior catalytic efficiency and stability. A possible reaction mechanism is suggested, integrating DFT calculations with experimental observations. This research offers valuable insights into the selective conversion of HMF to DFF and encourages further exploration into the dehydrogenation of biomass alcohols into high-value chemicals under oxidant-free conditions.
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高影响因子
ELECTROANALYSIS
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2012
·Vol. 24
·期 2
·286-292
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IF 2.872
Chengxiang Ruan,Li Xu,Xiuzhen Wang,Jin Lou,Weimin Gao,Wei Sun
In this paper a molecular wire modified carbon paste electrode (MW-CPE) was firstly prepared by mixing graphite powder with diphenylacetylene (DPA). Then a graphene (GR) and chitosan (CTS) composite film was further modified on the surface of MW-CPE to receive the graphene functionalized electrode (CTS-GR/MW-CPE), which was used for the sensitive electrochemical detection of adenosine-5′-triphosphate (ATP). The CTS-GR/MW-CPE exhibited excellent electrochemical performance and the electrochemical behavior of ATP on the CTS-GR/MW-CPE was carefully studied by cyclic voltammetry with an irreversible oxidation peak appearing at 1.369 V (vs. SCE). The electrochemical parameters such as charge transfer coefficient ( α ) and electrode reaction standard rate constant ( k s ) were calculated with the results of 0.53 and 5.28×10 −6 s −1 , respectively. By using differential pulse voltammetry (DPV) as detection technique, the oxidation peak current showed good linear relationship with ATP concentration in the range from 1.0 nM to 700.0 µM with a detection limit of 0.342 nM (3 σ ). The common coexisting substances, such as uric acid, ascorbic acid and guanosine-5′-triphosphate (GTP), showed no interferences and the modified electrode was successfully applied to injection sample detection.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Tianyun Jing,Shaokang Yang,Tingting Li,Yangyang Wan,Huimin Jia,Yonghai Feng,Yunpeng Zuo,Dewei Rao
Atomic scaling of cobalt-based catalysts is the feasible and sustainable approach for selective oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) to produce bio-plastic monomer of 2,5-furandicarboxylic acid (FDCA) under mild conditions. Here, a high-efficiency dual single-atomic Co/Cu supported on nitrogen-doped carbon (a-Co/Cu-NC) is constructed. Leveraging exceptional oxygen activation ability, the Co/Cu dual-atomic-sites can accelerate the HMF oxidation, suppressing by-product formation mediated by reactive oxygen species (ROS) in low-oxygen environments. This leads to enhanced FDCA selectivity with a yield of 98% and a production rate of 298.8 mmol FDCA g metal −1 h −1 under ambient conditions. Comprehensive experiments and density functional theory (DFT) calculations demonstrate that long-range interactions between Co and Cu sites optimize reactant adsorption and lower energy barriers for •O 2 − and HMFCA formation.
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高影响因子
Separations
·
2024
·Vol. 11
·期 2
·39
·
IF 2.5
Zhenhua Sun,Qingxiang Shu,Qikun Zhang,Shaopeng Li,Ganyu Zhu,Chenye Wang,Jianbo Zhang,Huiquan Li,Zhaohui Huang
ZSM-5 zeolite is a kind of high-value-added porous aluminosilicate zeolite. The use of the coal gasification slag utilization process by-product desilication liquid as a silicon raw material to replace the current raw materials such as water glass will help reduce production costs and achieve high-value utilization of solid waste. ZSM-5 zeolites for volatile organic compounds (VOCs) adsorption were prepared by a one-step hydrothermal method using the desilication solution prepared from coal gasification slag as the main silicon source and sodium source. The effects of crystallization reaction time, the crystallization temperature, the Na2O/SiO2molar ratio, and the SiO2/Al2O3molar ratio on the relative crystallinity and the specific surface area of the ZSM-5 zeolite were investigated and optimized. The optical reaction conditions were as follows: a crystallization time of 12 h, a crystallization temperature of 170 °C, a Na2O/SiO2molar ratio of 0.2, and a SiO2/Al2O3molar ratio of 200. The optimal ZSM-5 zeolite synthesized is hexagonal, with regular grains, a relative crystallinity of 101.48%, a specific surface area of 337.48 m2·g−1, and a pore volume of 0.190 cm3·g−1. And the optimal ZSM-5 zeolite was composed of SiO2content of 97.52 wt%, Al2O3content of 1.58 wt%, Na2O content of 0.33 wt%, and SiO2/Al2O3molar ratio of 104.93. Na2O/SiO2molar ratio is 0.0033. The results of static adsorption experiments show that the static adsorption capacities of ZSM-5 zeolite forp-xylene, benzene, toluene, and butyl acetate were 118.85, 69.98, 68.74, and 95.85 mg·g−1, respectively, which can effectively adsorb VOCs. The synthetic process of the ZSM-5 zeolite is a simple preparation process and short in synthesis time. The results of this study not only help to realize the high-value utilization of silicon components in solid waste, but also provide an economical and effective way to synthesize VOCs adsorption materials.
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2025
·
IF 1.7
Yu Peng,Zhang Rui
Solid acid catalysts containing both Brønsted acidic and Lewis acidic sites were hydrothermally prepared in this work to convert glucose into 5-hydroxymethylfurfural (5-HMF). A series of catalysts was synthesized by combining metal salts (CuSO 4 , ZrOCl 2 , Al 2 (SO 4 ) 3 , Co (NO 3 ) 2 ) with 2,4,6-trimethylbenzene-1,3,5-trimethylphosphonic acid (H 6 L) as a ligand in a hydrothermal reaction. Additionally, either 2,2-bipyridyl or 4,4-bipyridyl was added as an auxiliary ligand to adjust the internal structure and enhance the Brønsted acid strength of the catalyst, resulting in solid acid catalysts with varying Lewis acid site content. Catalyst characterization demonstrated that 4,4-bipyridine was more effective in enhancing Brønsted acid strength compared to 2,2-bipyridine. Glucose dehydration was performed to synthesize 5-HMF in a two-phase reaction solvent composed of saturated brine, sec-butanol, and methyl isobutyl ketone (1:1.6:4 ratio) at 463 K. The experiments results indicated that the CoL4 catalyst achieved a conversion yield of 89.1% and exhibited excellent thermal stability. The present study emphasizes the comparison and selection of bipotent acid solid catalysts containing different metal active sites for light use in the dehydration of glucose to 5-HMF.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Ruixue Zhang,Weiyao Yang,Hongda Zhang,Le Sang,Zhiping Zhao
This work presents the efficient, safe, and continuous production of 5-hydroxymethylfurfural (HMF) and levulinic acid (LA) from inulin in micropacked bed reactors (μPBRs) over HND-580. Through optimization reaction conditions, the highly selective production of fructose and LA from aqueous inulin and HMF from an inulin DMSO-water mixed solution can be achieved with respect to other reactor technologies. The highest yields of 89% for fructose, 81% for HMF, and 84% for LA can be obtained within a reaction time of 7.26 min. Polysaccharide inulin is used as the reaction substrate, and the space-time yield (STY) of HMF and LA in μPBRs is at least an order higher than that in conventional batch reactors. Subsequently, an intrinsic kinetic model for inulin conversion is established. The most predicted values show good agreement with the experimental results with a relative error of ±20%.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiaming Guo,Jing Li,Shanhao Ze,Fei Li,Junchao Wang,Qing Liu,Zhe Hua,Liu Yang,Fei Liu,Baodan Liu
In this study, we introduce a novel perspective that the formation of the atomically ultrathin oxide layer on the surface of liquid alloys is primarily governed by thermodynamic laws and is additionally influenced by the surface tension of the liquid alloys. In this case, we control the competition of Gibbs free energy and surface tension to effectively address the severe segregation problem of Ga 2 O 3 and realize the precise doping of Ga 2 O 3 in the preparation process of two dimensional IGO film through the liquid InGa alloy printing approach. Importantly, the Ga 2 O 3 content in the IGO films can be tailored in the full range and a sub-5 nm ultrathin IGO film transistor is innovatively fabricated. The oxidation law, band gap, Fermi level, field-effect mobility, subthreshold swing, and other properties of IGO films in sub-5 nm scale are systemically investigated in detail. It has been demonstrated that the incorporation of Ga 2 O 3 in the doping process dramatically reduced the device's turn-off current and enhanced its ability to resist ultraviolet interference. This novel doping process opens up a significant opportunity for future developments of atomically ultrathin transparent conducting film.
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高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Peixin Wang,Ruilong Zhang,Ifunanya Rejoice Akaniro,Puranjan Mishra,Reeti Kumar,Jun Zhao
Catalytic dehydration of fructose to 5-hydroxymethylfurfural (HMF) is a key reaction in biomass valorization and sustainable chemistry. The development of solid acid catalysts with high selectivity for HMF remains challenging due to the formation of undesired by-products, such as levulinic acid and formic acid in the reaction. In this study, SrNb2O6 catalysts with various morphologies were prepared by a facile one-step hydrothermal method, triggering synergetic catalysis for selective transformation of fructose to HMF. Among the Nb-based mixed oxides synthesized under varying conditions, including different pH environments and Nb concentrations, SrNb2O6 nanorods (denoted as SNO-NR, with pH = 13 and Sr/Nb ratio of 1:2) demonstrated the highest catalytic performance. Specifically, it achieved a 74.9% HMF yield and a selectivity of 78.5% in DMSO at 120°C for 1 hour. Comprehensive characterization analyses collectively indicated that an optimal acid capacity and a balanced Brønsted/Lewis acid ratio, which facilitate synergistic effects, are critical for achieving a highly selective conversion of fructose to HMF. Furthermore, it is also noteworthy that this SNO-NR catalyst was recyclable and stable for up to six runs with a minor reduction in its activity, confirming its remarkable robustness.
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高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 8
·1-12
·
IF 2.4
Ma Xueqin,Shen Liuwei,Shi Gaolei,Zhang Xingguang
The selective oxidation of 5-hydroxymethylfurfural (HMF) to value-added products plays an important role in biomass catalytic transformation, which essentially depends upon design of highly efficient and selective catalysts. This study aims to identify contributions of silanols (Si-OH groups) on Ag/USY catalysts to regulating catalytic performances in selective oxidation of HMF to HMFCA (5-hydroxymethyl-2-furancarboxylic acid), by means of aluminium tri-sec-butoxide (AlBO) modification to suppress Si-OH groups of USY and 2,6-di-tert-butylpyridine (2,6-DTBPy) selective poison to shield Brønsted acid sites in the reaction system. The catalysts are characterized by XRD, BET, TEM, XPS and FT-IR to examine the crystal structures, surface areas, porosity, morphology, Ag distribution, chemical states, and surface adsorptive properties. The HMF conversion (44-49.2%) slightly changes with increasing AlBO content, whereas the HMFCA selectivity gradually goes down from 56.2 to around 22.1% and the levulinic acid (LA) selectivity minorly raises from 5.6 to 12.8%. The production of LA originates from enhanced Brönsted acid sites after AlBO modification, and the decline of HMFCA selectivity is principally attributed to the suppression of Si-OH groups that weakens the interaction between HMF reactants and catalysts. This work provides new insights into the role of surface modification in tailoring metal and zeolite-based catalysts for organic conversions. Graphical
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