Current Research in Food Science
·
2022
·
IF 6.269
Zihao Wang,Ayuan Xiong,Yougui Yu,Qing Zheng
The development of low-alcohol liquor (Baijiu) can represent a tool to solve the problems of excessive alcohol intake. However, low-alcohol liquor has an insufficient ester aroma and a bland taste due to the alcohol dilution process. This study proposes an electrochemical catalysis technology to catalyze the esterification reaction between the acid and alcohol in liquor, thereby enhancing the ester aroma of low-alcohol liquor. In the electrochemical conversion process, the gold electrode with a certain potential promotes the formation of carbocation intermediate from corresponding carboxylic acid, thereby improving the esterification reaction efficiency. The key finding is that the total ester content of liquor treated using this technology is increased by more than 20%, and a strong ester aroma is attained. This study clarifies the electrocatalytic mechanism of the esterification reaction in liquor, and provides a new idea for making low-alcohol liquor become more attractive for aroma and taste aspects trying to obtain an alternative product contributing to the public health.
研究领域:
食品科学
·
化学工程
·
生物催化
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Renliang Huang,Yuefei Wang,Wei Qi,Rongxin Su,Zhimin He
A novel concept was developed to prepare peptide nanofibers and hydrogels via chemical catalysis triggered self-assembly using amino acid and its N -fluorenylmethoxycarbonyl (Fmoc)-derivatives as the starting materials. In this concept, EDC/NHSS was chosen as the catalyst to activate the substrate and synthesize the peptides to initiate the self-assembly. Two stable and transparent peptide (Fmoc-FF and Fmoc-VF) hydrogels that consist of self-assembled nanofibers were prepared successfully. Our results provided a potential route for the efficient and large-scale production of peptide-based nanomaterials .
研究领域:
生物化学
·
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 38
·e202402768
·
IF 1.9
Guangfei Qu,Yun Zhang,Junyan Li,Zhishuncheng Li
Graphical Electrochemically catalyzed ionic liquid technology facilitates lignin cleavage at 230 °C, with vanillin yields reaching 88.54 % at 3 V and guaiacol yields at 48.24 % at 4 V, showcasing enhanced productivity in lignin-derived compounds. Significant attention has been devoted to using biomass as a renewable resource to address the energy crisis and mitigate environmental pollution. Biomass, a potential substitute for fossil fuels, contains a substantial amount of lignin, ranging from 10 % to 25 %. Hence, it is crucial to research lignin depolymerization. In this study, the use of electrochemically catalyzed ionic liquids enabled the cracking of lignin at low temperatures. Specifically, by applying a low voltage at 230 °C, the controlled generation of vanillin and guaiacol was achieved. The concentration of vanillin in the depolymerized lignin reached 88.54 % under 3 V conditions. Similarly, it is presumed that the yield of guaiacol at 4 V is 48.24 %. These findings have significant implications for the targeted management of lignin depolymerization byproducts. Ultimately, this project establishes a framework for the high-value utilization of biomass and provides new perspectives on addressing the energy problem and environmental degradation.
研究领域:
生物质能
·
有机化学
·
环境科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Jinrui Li,Zhongxin Zhuang,Zheng Guo,Zhonggang Liu,Xingjiu Huang
Exploiting advanced bimetallic oxide as sensing materials for electroanalysis offers new opportunity to improve the electrochemical performance, but still presents a tough challenge. Herein, we synthesized the uniform Fe 2 O 3 /Mn 3 O 4 nanocubes from a framework structure in a facile approach, which were developed as the electrochemical catalyst for individual and simultaneous analysis of Cu(II) and Hg(II) in 0.1 M HAc-NaAc buffer solution (pH5.0). It showed the excellent electrochemical behavior for the simultaneous analysis Cu(II) and Hg(II) with high sensitivities of 69.29 and 190.55 μA μM cm −2 . The corresponding limit of detection values (LODs) were calculated to be 3.94 nM and 1.39 nM, respectively. The excellent electrochemical behavior of Fe 2 O 3 /Mn 3 O 4 could be attributed to the large specific surface area, which could provide a large number of adsorption sites for Cu(II) and Hg(II). Meanwhile, the bimetallic Fe and Mn atoms arranged in the porous nanocubes could offer a synergistic effect and improve the electrochemical activity. Moreover, it could be successfully applied for the simultaneous analysis of Cu(II) and Hg(II) in real water samples with the favorable recovery rate. The results confirmed that the Fe 2 O 3 /Mn 3 O 4 nanocubes could serve as a reliable platform for the simultaneous analysis of Cu(II) and Hg(II).
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials
·
2023
·Vol. 17
·期 1
·6
·
IF 3.4
Yu Lei,Hongdian Chen,Chenyang Shu,Changguo Chen
Developing catalysts with superior activity to hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is equally important to the overall photoelectrochemical water splitting to produce hydrogen. In this work, bismuth oxyiodide (BiOI), iron-modified bismuth iodide Fe/BiOI, and the sulfurized S-Fe/BiOI were prepared using the solvothermal method. The three materials all have good absorption ability for visible light. The photoelectrochemical catalytic activity of BiOI to oxygen evolution reaction (OER) is significantly enhanced after iron modification, while the sulfurized product S-Fe/BiOI exhibits better catalytic activity to hydrogen evolution reaction (HER). Hence, OER and HER can be simultaneously catalyzed by using Fe/BiOI and S-Fe/BiOI as anodic and cathodic catalysts to facilitate the overall photoelectrochemical water splitting process.Keywords:bismuth oxyiodide;iron modification;sulfurization;overall water splitting;photoelectrochemical catalysis
研究领域:
材料科学
·
催化
·
光电化学
·
能源转换
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Dandan Song,Lili Wang,Bing Wang,Jianguo Yu,Yanting Li,Yuning Qu,Cunpeng Duan,Yuying Yang,Xueli Miao
The construction of non-precious metal nanomaterial with higher sensitivity and better selectivity is very important for glucose detection. In this paper, three-dimensional (3D) hierarchical layered double hydroxide (LDH) nanomaterials (CC@CCH NiFe LDH) are successfully synthesized by simple hydrothermal method. 1D basic cobalt carbonate (CCH) nanorods arepreliminarily formed on the carbon cloth (CC), which acts as support, and then 2D NiFe LDH nanosheets are guided to deposit on the surface. Therefore, the hierarchical layered structure was obtained with high surface area and more active sites. The prepared CC@CCH NiFe LDH electrode material possessesexcellent electrochemical catalytic oxidation performance. The test results show that the electrode material has high sensitivity (6610 μA·mM-1·cm -2 ), wide linear range (0.01-1 mM), fast current response (< 10 s) and low detection limit (3 μM). Furthermore, the sensor material has good selectivity.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2016
·Vol. 7
·期 2
·387-395
·
IF 5.287
Wei Su,Hussein A. Younus,Kui Zhou,Zafar A. K. Khattak,Somboon Chaemcheun,Cheng Chen,Francis Verpoort
Incorporation of negatively charged moieties into complexes is a promising strategy to develop water oxidation catalysts with high stability and low over-potentials. We reported here the synthesis of a novel pincer-type ligand precursor, 1-(pyridin-2-ylmethyl)-3-methylcarboxylate-imidazolium (1). Deprotonation of C2-H of 1 resulted in formation of NCNHCO, a negatively charged asymmetric N-heterocyclic carbene (NHC). Complexes [Ru(NCNHCO)(terpy)]+ (2) and RuCl(NCNHCO)(DMSO)(pic) (3) were prepared and capable of decomposing water chemically and photo-chemically. Under acidic conditions, 4-picoline/H2O exchange in 3 was detected by UV-vis and 1H NMR, forming the corresponding Ru–aqua complex. In a typical three-component light-induced water oxidation, a turnover number of 273 was attained employing 3, which demonstrated catalytic ability comparable to those state-of-the-art catalysts.
研究领域:
化学
·
催化科学
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2021
·
IF 4.952
Min Zhang,Weibo Lu,Huicheng Yang,Pingan Zheng,Hujun Xie,Kang Chen,Jing Xue,Qing Shen
Enzyme-catalysis and chemocatalysis of fish oil are popularly used in industrial transesterification, but their effect on the intact molecular species is still unclear. This work aimed to trace the variation of lipid molecules and compare the performance of these two methods. During the transesterification reaction, lipidomics study was fully exploited using ultra performance liquid chromatography triple time-of-flight mass spectrometry to characterize the glycerides. The positional distribution of fatty acids in the structured triglycerides was interpreted. A total of 543 glycerides including 15 monoglycerides, 129 diglycerides and 399 triglycerides have been identified and quantified. The results of principal component analysis and orthogonal partial least squares-discriminant analysis displayed a clear molecular phenotype of different catalyzed oils, which also indicated the main difference of the molecules of TG (60:15), TG (60:14), TG (62:16), etc. In conclusion, the enrichment of EPA and DHA by enzyme-catalysis was superior to that by chemical catalysis.
研究领域:
生物化学
·
食品科学
·
分析化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2015
·Vol. 25
·期 25
·3899-3906
·
IF 11.805
Sheng Han,Yunlong Feng,Fan Zhang,Chongqing Yang,Zhaoquan Yao,Wuxue Zhao,Feng Qiu,Lingyun Yang,Yefeng Yao,Xiaodong Zhuang,Xinliang Feng
A novel phosphorus-containing porous polymer is efficiently prepared from tris(4-vinylphenyl)phosphane by radical polymerization, and it can be easily ionized to form an ionic porous polymer after treatment with hydrogen iodide. Upon ionic exchange, transition-metal-containing anions, such as tetrathiomolybdate (MoS 4 2− ) and hexacyanoferrate (Fe(CN) 6 3− ), are successfully loaded into the framework of the porous polymer to replace the original iodide anions, resulting in a polymer framework containing complex anions (termed HT-Met, where Met = Mo or Fe). After pyrolysis under a hydrogen atmosphere, the HT-Met materials are efficiently converted at a large scale to metal-phosphide-containing porous carbons (denoted as MetP@PC, where again Met = Mo or Fe). This approach provides a convenient pathway to the controlled preparation of metal-phosphide-loaded porous carbon composites. The MetP@PC composites exhibit superior electrocatalytic activity for the hydrogen evolution reaction (HER) under acidic conditions. In particular, MoP@PC with a low loading of 0.24 mg cm −2 (on a glass carbon electrode) affords an iR -corrected (where i is current and R is resistance) current density of up to 10 mA cm −2 at 51 mV versus the reversible hydrogen electrode and a very low Tafel slope of 45 mV dec −1 , in rotating disk measurements under saturated N 2 conditions.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
DOI
高影响因子
EES Catalysis
·
2023
·Vol. 1
·期 3
·312-321
·
IF 0
Yiqiao Wang,Siyuan Pan,Huan Li,Dewang Li,Yong Guo,Sijia Chi,Chuannan Geng,Shichao Wu,Quan-Hong Yang
Despite lithium–air batteries having unprecedented theoretical energy supremacy, rambling Li2O2 growth typically impedes O2 diffusion and electron transfer, causing low capacity, poor charging kinetics and short cycle life. Herein, we propose synergistic catalysis in the cathode by engineering the crystal facet of Fe2O3 nanoplates and introducing a visible light-excited photochemical effect. The growth of Li2O2 is regulated with a uniform distribution, mitigating local product aggregation and thus reducing the barriers of O2 diffusion and electron transfer. The improved reaction kinetics lead to ∼420% capacity improvement, low charge potential, superior rate performance, and long-term stability (300 cycles) in actual air. We reveal a mechanism that photoelectrons around each catalyst node and the resultant homogeneous internal electric field increase charge transfer, decrease soluble intermediates, and enable high electrochemical reversibility of amorphous Li2O2 with an ordered process. This study provides inspiring insights for future research into controlling product ordering in Li–air batteries.
研究领域:
电化学
·
纳米材料科学
·
能源化学
·
催化化学
·
电池技术
✓ 已验证
DOI
Small
·
2020
·Vol. 16
·期 22
·2000870
·
IF 11.459
Kezhong Lv,Pengfei Wang,Chao Wang,Zihan Shen,Zhenda Lu,Huigang Zhang,Mingbo Zheng,Ping He,Haoshen Zhou
Lithium–sulfur batteries, as one of promising next-generation energy storage devices, hold great potential to meet the demands of electric vehicles and grids due to their high specific energy. However, the sluggish kinetics and the inevitable “shuttle effect” severely limit the practical application of this technology. Recently, design of composite cathode with effective catalysts has been reported as an essential way to overcome these issues. In this work, oxygen-deficient ferric oxide (Fe 2 O 3− x ), prepared by lithiothermic reduction, is used as a low-cost and effective cathodic catalyst. By introducing a small amount of Fe 2 O 3− x into the cathode, the battery can deliver a high capacity of 512 mAh g −1 over 500 cycles at 4 C, with a capacity fade rate of 0.049% per cycle. In addition, a self-supporting porous S@KB/Fe 2 O 3− x cathode with a high sulfur loading of 12.73 mg cm −2 is prepared by freeze-drying, which can achieve a high areal capacity of 12.24 mAh cm −2 at 0.05 C. Both the calculative and experimental results demonstrate that the Fe 2 O 3− x has a strong adsorption toward soluble polysulfides and can accelerate their subsequent conversion to insoluble products. As a result, this work provides a low-cost and effective catalyst candidate for the practical application of lithium–sulfur batteries.
研究领域:
电化学
·
能源材料
·
纳米催化
·
储能技术
·
材料科学
✓ 已验证
DOI
高影响因子
Nano Research
·
2016
·Vol. 10
·期 3
·1064-1077
·
IF 8.893
Qiu Pengtao,Lian Shaomin,Yang Guang,Yang Shengchun
We demonstrate a facile hydrothermal one-pot synthesis method for producing single crystalline mesoporous PtPd bimetallic nanoparticles with a hollow interior and porous surface structure in the presence of Br – and I – ions. The formation process analysis indicated that the coexistence of Br – and I – ions is responsible for the formation of the novel bimetallic nanoparticles. The changes in the reduction potential of Pt and Pd metal ions achieved by the coordination with different halide ions resulted in the formation of hollow interiors as a galvanic reaction between Pd 2+ and Pt 4+ ions occurred. In addition, the size of the mesoporous PtPd nanoparticles can be well controlled by slightly changing the amount of I – ions used. The electrochemical tests indicated that the assynthesized single crystalline mesoporous PtPd hollow nanoparticles exhibited enhanced catalytic properties toward methanol and ethanol oxidation reactions as compared with the commercial Pt black and Pt/C materials.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）