GREEN CHEMISTRY
·
2019
·Vol. 22
·期 2
·532-539
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IF 9.405
Qixuan Lin,Shouwei Liao,Libo Li,Weiying Li,Fengxia Yue,Feng Peng,Junli Ren
In this study, experiments and molecular dynamics simulations were combined to get insights into the role of solvent during the process of xylose conversion under catalyst-free conditions. Solvents used for furfural production were comparatively discussed, including traditional and emerging biomass-derived solvents – water, dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), isopropanol (ISO), γ-butyrolactone (GBL) and γ-valerolactone (GVL). The degradation behavior of solvents, the solubility and α/β ratio of xylose, the distribution of the solvent around xylose/furfural and the hydrogen bonding between them were also studied. The results showed that in pure solvents, the different hydrogen bonding between xylose and the solvent resulted in different products. Water was a favourable solvent for xylose to form furfural among these pure solvents because less formic acid was produced from xylose in water under catalyst-free conditions. Furfural could be produced in mixed solvents if there was more water around xylose, which was similar to the case in pure water. Otherwise, the situation in mixed solvents was similar to that in the corresponding pure organic solvents. GBL and GVL, as green solvents, had weaker affinities with xylose than DMSO, DMF and ISO, but were intensively attracted by furfural, thus they could provide protective shells for furfural, which played a positive role during the production of furfural. The highest furfural yield of 46.4% was achieved in GBL–H2O at 180 °C – 150 min in the absence of catalysts.
研究领域:
化学工程
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生物质转化
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分子动力学模拟
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绿色化学
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DOI
高影响因子
Journal of Biobased Materials and Bioenergy
·
2017
·Vol. 11
·期 6
·543-552
·
IF 0.975
Dong Kaijun,Zhang Jun,Luo Weimin,Su Lin,Huang Zhilin
A series of zirconium based catalysts were synthesized to study the transfer hydrogenation of biomass derived ethyl levulinate into γ-valerolactone (GVL) using lower alcohols as hydrogen donors. The essential textural and chemical characteristics of prepared samples were
identified by various techniques including SEM, XRD, NH3-TPD, TGA, CO2-TPD and nitrogen physisorption. Parameters such as hydrogen donor, catalyst type, temperature, stirring rate, and catalyst dosage were found to play a critical role in GVL production. A promising GVL
yield of 98.3 mol% with a highest GVL formation rate at 5239.4 μmol g–1
cat h–1 was obtained in isopropanol at 433 K over zirconium oxide derived from zirconyl nitrate. The recycling experiments revealed that the zirconium oxide catalyst
derived from zirconyl nitrate presented relatively satisfied performance and stability.
研究领域:
化学工程
·
催化材料科学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yuming Tu,Gaoyan Shao,Wenjing Zhang,Jianjie Chen,Yixin Qu,Fan Zhang,Shichao Tian,Zhiyong Zhou,Zhongqi Ren
Printing and dyeing wastewater generally has high pH, high turbidity , poor biodegradability , complex composition, and high chroma, which make it one of the most difficult industrial wastewaters to treat. Herein, heterogeneous ozone oxidation technology is applied to oxidize and degrade printing and dyeing wastewater. A metal oxide catalyst supported on activated carbon (γ-MnO 2 /AC) was prepared by hydrothermal synthetic method and shown to enable synergistic catalysis involving MnO 2 metal sites and N/C sites. A simulated methyl orange solution was used to determine the effects of various preparation and operation parameters. The results confirmed that the γ-MnO 2 /AC catalyst exhibited good chemical oxygen demand (COD) removal and reusability. Additionally, γ-MnO 2 /AC demonstrated excellent degradation of the secondary biochemical effluent of printing and dyeing wastewater (COD removal = 72.45% within 120 min). The γ-MnO 2 /AC catalyst was fully characterized, and the mechanism governing its catalytic ozone oxidation process was investigated experimentally.
研究领域:
环境科学
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催化材料
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Qingfeng Liu,Yunfei Bai,Hong Chen,Mengmeng Chen,Yushuai Sang,Kai Wu,Zewei Ma,Yiming Ma,Yongdan Li
The efficient depolymerization and hydrodeoxygenation of enzymatic hydrolysis lignin are achieved in cyclohexane solvents over a gamma-alumina supported nickel molybdenum alloy catalyst in a single step. Under initial 3 MPa hydrogen at 320 °C, the highest overall cycloalkane yield of 104.4 mg/g enzymatic hydrolysis lignin with 44.4 wt% selectivity of ethyl-cyclohexane was obtained. The reaction atmosphere and temperature have significant effects on enzymatic hydrolysis lignin conversion, product type and distribution. The conversion of enzymatic hydrolysis lignin was also investigated over different nickel and molybdenum-based catalysts, and the gamma-alumina supported nickel molybdenum alloy catalyst exhibited the highest activity among those catalysts. To reveal the reaction pathways of alkylphenol hydrodeoxygenation, 4-ethylphenol was tested as a model compound. Complete conversion of 4-ethylphenol into cycloalkanes was achieved. A two-step mechanism of 4-ethylphenol dihydroxylation – hydrogenation is proposed, in which the benzene ring saturation is deemed as the rate-determining step.
研究领域:
生物化学
·
催化化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Dongjian Shi,Maoshuang Ran,Li Zhang,He Huang,Xiaojie Li,Mingqing Chen,Mitsuru Akashi
To enhance the glucose sensitivity and self-regulated release of insulin, biobased capsules with glucose-responsive and competitive properties were fabricated based on poly(γ-glutamic acid) (γ-PGA) and chitosan oligosaccharide (CS) polyelectrolytes. First, poly(γ-glutamic acid)-g-3-aminophenylboronic acid) (γ-PGA-g-APBA) and galactosylated chitosan oligosaccharide (GC) were synthesized by grafting APBA and lactobionic acid (LA) to γ-PGA and CS, respectively. The (γ-PGA-g-APBA/GC)5 capsules were then prepared by layer-by-layer (LBL) assembly of γ-PGA-g-APBA and GC via electrostatic interaction. The size and morphology of the particles and capsules were investigated by DLS, SEM, and TEM. The size of the (γ-PGA-g-APBA/GC)5 capsules increased with increasing glucose concentration due to the swelling of the capsules. The capsules could be dissociated at high glucose concentration due to the breaking of the cross-linking bonds between APBA and LA by the competitive reaction of APBA with glucose. The encapsulated insulin was able to undergo self-regulated release from the capsules depending on the glucose level and APBA composition. The amount of insulin release increased with incubation in higher glucose concentration and decreased with higher APBA composition. Moreover, the on–off regulation of insulin release from the (γ-PGA-g-APBA/GC)5 capsules could be triggered with a synchronizing and variation of the external glucose concentration, whereas the capsules without the LA functional groups did not show the on–off regulated release. Furthermore, the (γ-PGA-g-APBA/GC)5 capsules are biocompatible. These (γ-PGA-g-APBA/GC)5 with good stability, glucose response, and controlled insulin delivery are expected to be used for future applications to glucose-triggered insulin delivery.
研究领域:
生物材料学
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药物递送系统
·
医学工程
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DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Hong Guo,Fei Shen,Weichang Guo,Dingyuan Zeng,Yuting Yin,Xiaogang Han
All-solid-state batteries with garnet-type solid electrolytes are expected to achieve high safety. However, poor contact between the cathode and the solid-state electrolyte remains a bottleneck in improving electrochemical performance. We propose an interface modification strategy by adopting nano γ-Al 2 O 3 as a co-sintering additive to address the interfacial issue. The Li|Li 6.75 La 3 Zr 1.75 Nb 0.25 O 12 |LiCoO 2 all-solid-state battery exhibits promoted capacities due to intimate interfacial contact between the cathode and the electrolyte after modification. This work provides a low-cost and convenient strategy to overcome the interfacial issue in all-solid-state batteries.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2024
·
IF 2.8
Boyun Gao,Huijiang Huang,Mooeez Ur Rehman,Bin Ren,Yuruo Liu,Weipeng Fan,Pengfei Li,Lizhi Zhang,Yan Xu,Yujun Zhao
BACKGROUND The synthesis of fatty amines via fatty alcohol amination offers a promising avenue for environmentally friendly production, particularly when compared with the methods employing hydrocyanic acid which often involve significant emissions. RESULT This study explores the synthesis of n-hexylamine through one-step amination of n-hexanol utilizing a series of Ru-doped Ni catalysts supported over γ-Al 2 O 3 , achieving 61% n-hexanol yield, 35% dihylamine yield and 3.5% trihylamine yield at the n-hexanol conversion of 99%. CONCLUSION The characterization results of the catalysts revealed a significant interaction between ruthenium and nickel in the bimetallic catalysts, leading to the enhanced reducibility of Ni species and improved metal dispersion. Moreover, ruthenium species were found to play an important role in the dissociation of NH 3 into NH x (x = 1, 2), thereby significantly improving the dehydrogenation process of n-hexanol at Ni sites. The synergistic effect between the two kinds of metal sites emerges as crucial factor for the boosted alcohols amination process. © 2024 Society of Chemical Industry (SCI).
研究领域:
催化化学
·
环境科学
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DOI
高影响因子
NUCLEAR TECHNOLOGY
·
2026
·
IF 1.7
Shuaida Song,Jie Zhao,Xiangjie Duan,Na Zhou,Jizhuang Fan,Bo Tian,Yunchen Du
Polymer-based composites are receiving more and more attention in the field of radiation shielding due to their good recyclability and processability; however, the poor compatibility between the organic polymer matrices and inorganic fillers usually appears as a bottleneck to their full shielding effectiveness. Although compatibilizers are widely utilized to suppress the agglomeration of inorganic fillers, their impact on the overall performance of composites is less concerning.In this study, we systematically investigate the effects of three common compatibilizers, i.e. 3-aminopropyltriethoxysilane (KH550), 3-methacryloxypropyltrimethoxysilane (AM), and maleic anhydride–grafted polypropylene (PP-g-MAH), on the properties of WO3/PP composites, including rheological performance, thermal properties, crystallization behaviors, mechanical properties, and radiation shielding effectiveness.It was found that in addition to dispersing WO3 particles, KH550 and AM contribute to the formation of a heterogeneous network structure in the PP matrix, and especially for KH550, it can effectively promote the structural stability, thermal stability, crystallinity, and toughness of WO3/PP composites. More importantly, WO3/PP-S-K exhibits the best shielding performance, with linear attenuation coefficients of 3.71 cm−1 and 0.279 cm−1 under 241Am (59.6 keV) and 60Co (1332 keV) irradiation, respectively. Compared with the pristine WO3/PP composite, the half-value layer is markedly reduced to 0.187 cm and 2.48 cm, representing decreases of 25.5% and 60.6%.These findings underscore the enhancements in shielding performance and structural integrity achieved through modification with KH550, thereby providing valuable insights for the future development of environmentally friendly radiation shielding materials.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Wanchun Lin,Yingchun Liu,Jiayuan Yang,Bo-Mei Liu,Wei Liu,Maoping Lyu,Jesse Zhu,Hui Zhang
Recent public health issues and the rise of antimicrobial resistance have driven the demand for durable, self-activating antimicrobial surfaces. Traditional metal oxide coatings often suffer from uncontrolled ion release and limited antibacterial mechanisms, which hinder their long-term effectiveness. In this work, a mechanically robust, friction-activated hydrophobic antibacterial coating is developed by integrating γ-Bi 2 O 3 , polydimethylsiloxane (PDMS), and nanoscale hydrophobic SiO 2 . PDMS imparts low surface energy, while SiO 2 reinforces mechanical stability; substrate adhesion is further enhanced via plasma treatment followed by KH570 silane grafting. Microscale tetrahedral γ-Bi 2 O 3 (∼6 μm) with nanoscale tips (∼200 nm) enables a synergistic antibacterial effect through controlled Bi + release and mechanical membrane disruption, while maintaining low cytotoxicity. Upon friction activation, the P 1 B 2 S 0.04 coating exhibited an increase in water contact angle from 113.1 ± 1.7 ° to 145.9 ± 3.7 ° after 1000 abrasion cycles. The antibacterial rates against E. coli reached 99.94 %, 99.67 %, and 99.87 %, and S. aureus values were 97.77 %, 99.08 %, and 99.29 % after 300, 600, and 900 cycles, respectively. Cytotoxicity tests confirmed good biocompatibility, with cell viability exceeding 80 %. These results indicate that the coating maintains sustained antibacterial performance after repeated abrasion, showing strong potential for applications on medical and public surfaces.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 8.4
Zewei Liu,Liping Zhang,Mingqian Cheng,Ling Chen,Wei Fang,Qihong Cen,Chao Chen,Bin Li
CF 4 , is a highly potent greenhouse gas emitted by the electrolytic aluminum industry, with a global warming potential 7390 times that of CO 2 . Its urgently necessary to effectively control and decompose it. Alumina industry is the upstream of electrolytic aluminum industry, from which the red mud (RM) generated should be recycled. In this study, the decomposition performance of CF 4 was improved by loading γ-Al 2 O 3 on hydrochloric acid-treated RM. Under optimal conditions (reaction temperature of 650 °C, WHSV of 1500 h −1 , and material dosage of 1 g), the decomposition efficiency of Al 1 HRM 2 for CF 4 reached 85 %. Compared with the unmodified acid-treated RM (HRM), the conversion rate and stability were significantly improved. The results of NH 3 -TPD, Py-IR and XPS indicated that acid treatment and addition of γ-Al 2 O 3 significantly increased the Lewis acid site and medium-strong acid site of Al 1 HRM 2 . During the reaction, CF 4 adsorbs and dissociates at the strongest Lewis acid site (Al Ⅲ ), forming an intermediate (CF 2 O) and CO 2 to achieve the decomposition of CF 4 . In comparison with existing decomposition techniques, the method proposed here avoids the generation of corrosive HF, while also promoting the development of a greener aluminum industry and the formation of high-value fluorides.
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Hao Zhang,Guang-Ren Qian,Hong Liu
Alumina composites containing microporous ZSM-5 (Z-5) and mesoporous ZSM-5 (MZ-5), corresponding to x ZA and x MZA, were developed by incorporating Z-5 and MZ-5 into γ - Al 2 O 3 , respectively. The two series of NiMoS/ x MZA and NiMoS/ x ZA catalysts were prepared with these two composites as supports, respectively, and were used for the simultaneous hydrodesulfurization (HDS) of thiophene (T) and benzothiophene (BT). The results show that NiMoS/ x MZA series catalysts exhibit higher HDS activity than that of NiMoS/ x ZA and NiMoS/γ-Al 2 O 3 , and the HDS activity of NiMoS/ x MZA catalysts increases with the increase of MZ-5. The high HDS activity can be mainly attributed to the synergistic effects of the efficient diffusing pore channels, high dispersion of type II NiMoS phases, suitable acidity, and moderate Mo-support interaction. Moreover, the product distribution of HDS shows that the NiMoS/ x MZA catalysts possess the dominant direct desulfurization (DDS) selectivity and the selectivity increases with the increase of MZ-5 content due to more corner sites and suitable Brønsted (B) acid sites, whereas the NiMoS/ x ZA catalysts perform more excellent hydrogenation (HYD) selectivity, and the selectivity increases with the increase of Z-5 content because of the existence of more edge sites. Based on this, the possible reaction network for T and BT hydrodesulfurization over the catalysts are proposed.
研究领域:
催化化学
·
能源化工
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zihan Zhou,Silin Han,Yunwen Wu,Tao Hang,Huiqin Ling,Jie Guo,Su Wang,Ming Li
The SiO2 layers, as the dielectric in the multistack storage cells of 3D NAND, are detrimentally dissolved by phosphoric acid (PA) during the selective Si3N4 etching. The thinning of SiO2 layers leads to the failure of subsequent processes; thus, an etching inhibitor for SiO2 is crucial for 3D NAND fabrication. However, most inhibitors are currently limited to neutral or alkaline solutions. In this work, the γ-ureidopropyltriethoxysilane (UPTES), compatible with a hot-concentrated PA solution, was applied to the wet-etching process for the first time and exhibited an inhibitory effect on SiO2 etching by retarding the etch rate over 60% without affecting the Si3N4 etching. The saturation adsorption of UPTES on the SiO2 substrate is confirmed to occur around the critical concentration, according to the Langmuir–Freundlich adsorption isotherm. The adsorption behavior of UPTES exhibits a reliance on its concentration. Around the critical concentration, the UPTES molecules chemisorb on the SiO2 surface by Si–O–Si covalent bonds to form ordered UPTES-siloxane layers, avoiding contact between SiO2 and the etchant; whereas oversaturated UPTES polymers physisorb not only on SiO2 but also on Si3N4, impeding the Si3N4 etching. This work contributes to a step forward in the effective wet-etching process in high-density 3D NAND fabrication.
研究领域:
半导体制造
·
材料科学
·
微电子学
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表面化学
·
湿法刻蚀技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）