JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
·
IF 5.8
Shuang Wang,Huihui Zhang,Chunyan Yu,Yue Liu,Yanju Lu,Lu Li
In this study, Co-Corrin/C catalysts with corrin active skeleton were prepared by pyrolysis under anaerobic conditions using vitamin B12 (VB12) as a precursor and activated carbon with rich mesoporous structure as a carrier. The Co-Corrin/C catalyst was applied to the oxidative cleavage reaction of lignin, showing a 92.74 % breakage of β-O-4 bonds. Density functional theory (DFT) calculations indicate that the low energy gap difference of Co-Corrin/C promotes electron transfer between Co and O. Meanwhile, the pyrrole ring in the corrin structure will be adsorbed and bonded to oxygen, which promotes the generation of large amounts of oxygen free radicals. The C α -OH bond in the lignin aliphatic chain is oxidized to C α =O bond under the action of oxygen radicals, which reduces the dissociation energy of the β-O-4 bond and significantly improves the oxidation efficiency. Cycling experiments proved that Co-Corrin/C has good stability.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yihan Zhang,Song Wu,Ting Sun,Qianggen Li,Guangyin Fan
The development of a rapid and convenient strategy to regulate the surface microenvironment of inert carbon supports, along with the physicochemical properties of their supported metal nanoparticles, is essential for enhancing catalytic performance. In this study, we describe a straightforward and efficient solid-state microwave method that utilizes a household microwave oven to achieve the co-doping of oxygen and nitrogen in unfunctionalized carbon black (ONCB) using urea as a nitrogen source. The microwave solid-state treatment of commercial carbon black (CB) with urea not only introduces a significant number of heteroatomic functional groups but also substantially increases the pore size and pore volume of the matrix. These enhancements facilitate the uniform growth and dispersion of ultrafine Ru nanoparticles on the surface of ONCB. Consequently, the Ru/ONCB catalyst provides abundant catalytic active sites and mass transfer channels, thereby improving catalytic performance for hydrogen evolution from ammonia borane hydrolysis (ABH). The turnover frequency of Ru/ONCB for ABH reaches 4529 ± 238 min −1 (determined based on Ru dispersion), surpassing a range of analogues and many previously reported carbon-supported Ru catalysts. This study presents a simple and rapid strategy to regulate the surface microenvironment of unfunctionalized carbon support, thereby enhancing the catalytic performance of its supported metal nanoparticles for catalytic hydrogen generation
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Jiawen Zhang,Haoyang Xu,Yage Zheng,Yue Shen,Chaoqun Mu,Yao Wang,Aili Niyazi,Zhixian He,Zhiqiang Zhang,Liang Zhang,Juanqin Xue
In this work, a Z -scheme heterostructured BiOCOOH/O-gC 3 N 4 material was synthesized and immobilized on chitosan (CTS) to obtain the BiOCOOH/O-gC 3 N 4 /CTS photocatalytic material for photocatalytic degradation of oxytetracycline hydrochloride (CTC).Our findings indicate that the composite material BiOCOOH/O-gC 3 N 4 , as well as the BiOCOOH/O-gC 3 N 4 /CTS composite membrane , displayed a significantly higher efficiency in photocatalytic degradation of CTC compared to BiOCOOH alone, owing to the synergistic effect of adsorption and photocatalysis . Following four cycles of use, the composite material retained around 96 % of its initial photocatalytic degradation activity. The addition of CTS in the photocatalytic material resolved issues such as aggregation and difficult recovery commonly encountered with powder materials, thereby facilitating effective collision between the photocatalytic active sites and CTC. Experimental and theoretical calculations provided confirmation that the combination of BiOCOOH and O-gC 3 N 4 effectively enhanced the light absorption capacity and photocatalytic performance. Furthermore, we investigated the influence of environmental factors such as pH value and anions on the photocatalytic degradation experiment, which offers valuable insights for the application of composite catalysts in wastewater treatment .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Lijun Tang,Jian Gao,Tong Shen,Yubing Sun,Xiangyu Wang,Yongchao Zhang,Tiansheng Mu,Xiaodong Zhu
High energy density, intrinsic safety, and eco-friendliness of aqueous zinc‑iodine (Zn I 2 ) batteries are hindered by the shuttle effect and sluggish iodine redox kinetics. These limitations result in the formation of highly soluble triiodide ( I 3 − ) intermediates, which adversely affect energy density and cycle life. To address these issues, we designed N, O co-doped porous carbon with interconnected microchannels (N/O-PC) to create abundant catalytic sites and a locally strong adsorption microenvironment for the iodine reduction reaction (IRR). The unique structure of N/O-PC facilitates electrolyte penetration and enhances iodine fixation and loading, effectively inhibiting the formation and shuttling of I 3 − . Leveraging this favorable microenvironment, the battery exhibits exceptional cycling stability with a high capacitance retention rate after 65,000 cycles at 10 A g −1 . In situ characterization and theoretical calculations confirm that N/O dopants serve as active centers promoting the chemical immobilization and catalytic conversion of polyiodides. This work integrates physical adsorption and catalytic conversion to construct a host material, offering a novel strategy for developing a powerful Zn I 2 batteries.
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MOLECULES
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2019
·Vol. 24
·期 7
·1365
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IF 3.06
Qianyun Fu,Guoyun Li,Chen Wang,Ya Wang,Qinying Li,Jiejie Hao,Guangli Yu
Intestinal mucins constitute the major component of the mucus covering the epithelium of the gastrointestinal tract, thereby forming a barrier against microbial colonization. Rabbits are bred in large numbers worldwide, with little known about intestinalO-glycosylation despite this insight being crucial to the understanding of host-pathogen interactions. In the present study, a major mucin-type glycopeptide (RIF6) of hyla rabbit intestine was isolated and theO-glycans were extensively characterized based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) combined with bioinformatics approaches. Thirty-threeO-glycans were identified, and most of them were sulfated or sialylated glycans. It was worth noting that Neu5Gc-containing structures within sialylatedO-glycans accounted for 91%, which were extremely different from that of other species including humans, mice, chickens, etc. Sulfated glycans accounted for 58%, unique disufated and sulfated-sialylated glycans were also detected in rabbit intestinal mucin. These structural characterization reflected species diversity and may provide deeper insights into explaining the adaptability of hyla rabbit to the environment.Keywords:Hyla rabbit intestinal mucin;O-glycan;Neu5Gc;structural characterization
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PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2025
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IF 6.6
Wenbi Tuo,Jun Zhao,Xiaoli Yi,Siwei Xiong,Weidong Zhang,Yunzhi Tian,Yingying Du,Yanqing Shu,Yanan He,Yan Qu
Food safety is essential for protecting public health. This study introduces a novel microneedle (MN) patch that employs a pH-responsive colorimetric mechanism for the real-time, easy, and visible detection of meat freshness. The patch is a pH-responsive colorimetric microneedle (C3G/HAMA@MN) patch composed of eco-friendly bio-based components, specifically methacryloylated hyaluronic acid (HAMA) and cyanidin-3-O-glucoside (C3G). Its mechanical strength reaches 7 N per needle, capable of penetrating over 85% of meat tissue. The distinctive structural design allows the microneedle tip to quickly and directly penetrate the meat tissue, extracting interstitial fluid in situ and promptly transferring it to the backing layer. The backing layer visually indicates pH changes in real time. The color change from light to dark matches freshness levels at different deterioration stages. Without sophisticated instruments, consumers may notice the patch's color change in two minutes using their vision, allowing for simple and reliable food quality inspection. A powerful new instrument for on-site food safety monitoring combines real-time display, easy interpretation, and biodegradable materials.
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JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
·
IF 2.196
Yi Yu,Fang Zhang,Xiaoqiang Gao,Li Xu,Guoji Liu
In this research, solid-liquid equilibrium for the ternary system (2-naphthaldehyde + o -phthalic anhydride + 1,4-dioxane) was measured at 283.15 K, 293.15 K and 303.15 K, respectively. Three isothermal phase diagrams of the system were plotted using the values of the experimental solubility. Pure 2-naphthaldehyde and o -phthalic anhydride were formed at (283.15, 293.15 and 303.15) K, and were determined by Schreinemaker’s wet residue method. The crystallization region of o -phthalic anhydride was found to be much larger than that of 2-naphthaldehyde at a certain temperature. The experimental solubility at multiple temperatures was correlated by the NRTL and Wilson models. The NRTL model was more accurate than the Wilson model in this system. The diagram of density versus component was also constructed.
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JOURNAL OF CATALYSIS
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2024
·
IF 6.5
Fuping Song,Juping Zhang,Dongfang Li,Tao Zhu,Xing Zhu,Hua Wang
Oxidative dehydrogenation (ODH) of ethylbenzene is a promising process for styrene production. However, its application is limited by product overoxidation and purification requirements due to the co-feeding of mild oxidants. Herein, we report a facile manganese-based catalyst (K/Mn 3 O 4 -Al 2 O 3 ) and achieve competitive styrene selectivity of 88 % and ethylbenzene conversion of 95 % at 450 ℃ (84 % yield vs. ∼ 60 % yield in commercial dehydrogenation process at 600 ℃) under a cyclic redox ODH scheme. The introduction of Al 2 O 3 into MnO x restructures composite oxides and depresses bulk lattice-oxygen migration for the partial oxidation of ethylbenzene. The surface modification using potassium creates reactive sites and regulates surface properties, achieving ethylbenzene activation and high conversions. Highly active lattice oxygen in catalysts after bulk and surface modifications selectively converts ethylbenzene to styrene and water. This study provides an understanding of roles of manganese-based catalysts in styrene generation and offers a strategy to modulate lattice oxygen on catalysts.
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高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Worku Lakew Kebede,Kuo Dong-Hau,Chen Xiaoyun
Metal oxide semiconductor photocatalysts have received remarkable consideration as a promising technology for environmental remediation and energy conversion. Oxysulfide semiconductors have narrow band gaps which are appropriate for photocatalytic removal of toxic organic pollutants under visible light illumination. For the elimination purpose of these pollutants, Mo(O,S) 2 , Mn(O,S) 2 , and Mn–Mo(O,S) 2 oxysulfide catalysts containing various Mn contents were synthesized at low temperatures via a simple method. The structural, morphological, electrochemical, compositional, and optical properties of the as-synthesized catalysts were exhaustively characterized. The photocatalytic degradation activity of the bares Mo(O,S) 2 , Mn(O,S) 2 , and other Mn–Mo(O,S) 2 compositions were evaluated over different types of organic pollutants under visible light illumination. The addition of Mn in Mo(O,S) 2 structure improved the photodegradation activity, and Mn–Mo(O,S) 2 -30 was found to be the best composition with superior photodegradation performance towards the four cationic, anionic, and neutral dyes. The degradation efficiency of 10 ppm of MB, and MO dyes reach 99.7 % and 98.6 %, within 30 and 120 min, respectively. Mn–Mo(O,S) 2 -30 catalyst also shows a good photodegradation performance on Rh B and NR organic pollutants. According to the recycling test, the catalyst exhibited excellent performance. The photodegradation follows pseudo-first order kinetics with a rate constant of 0.097 and 0.036 min −1 for MB and MO dyes, respectively. The trapping experiment showed that superoxide anion radicals (O 2 •- ) and holes (h + ) are the responsible active species for the degradation on MO and MB, respectively. The novelty of using Mn–Mo(O,S) 2 -30 for various dyes degradation lies in its remarkable catalytic properties.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2016
·
IF 2.76
Jin Feng,Shanshan Wu,Hua Wang,Songbai Liu
Improved capability to inhibit degradation of trianionic curcumin has been realized in this study. The interaction between trianionic curcumin (Cur 3− ) and gemini dodecyl or tetradecyl O -glucoside micelles , tetradecyltrimethylammonium chloride (TTAC) or hexadecyltrimethylammonium bromide (CTAB) micelles as well as gemini alkyl O -glucosides (AGs)/alkyl trimethyl ammonium halides mixed micelles have been characterized. It is demonstrated that Cur 3− cannot be incorporated into gemini AGs micelles since the lack of electrostatic attraction and degraded as rapidly as in aqueous phase. Cur 3− tend to reside at palisade layer − water interface of TTAC or CTAB micelles due to the strong electrostatic interaction while moderate electrostatic interaction allows Cur 3− to locate more deeply in the palisade layer of mixed micelles. Additionally, mixed micelles tend to form a more compact and hydrophobic palisade layer than pure TTAC and CTAB ones. These factors bring about enhanced fluorescence intensity and blue − shift of emission maxima, improved fluorescence anisotropy and quantum yield, as well as reduced decay rate of Cur 3− in mixed micelles than in pure TTAC and CTAB ones.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yan Zhao,Pengjun Zhao,Qing Zhao,Donglin He,Wenwen Kong,Bing Wu,Aimin Chang
Herein, Mg–Al–Si–Ba–O-based glass ceramics were studied as potential candidates to protect Mn–Co–Ni–O-based negative temperature coefficient (NTC) thermistors at high temperatures such as 900 °C. The ceramics were prepared in three glass formulations (1#: 15MgO–15Al 2 O 3 -44.7SiO 2 –25BaO, 2#: 17MgO–17Al 2 O 3 –41SiO 2 –25BaO and 3#: 17MgO–17Al 2 O 3 –41SiO 2 –20BaO–5Y 2 O 3 (in mol%)) and their glass-transition temperatures ( T g ) were determined using the differential scanning calorimetry (DSC) method. Scanning electronic microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the parent glasses and glass-ceramic coatings. The sealing effects of the glass ceramics were examined by conducting an insulation test. The glass-ceramic sealing structures were subjected to 1000 thermal shock cycles at temperatures varying from room temperature to 900 °C. Notably, the sealing structure of glass-ceramic coating 1# was compact at a T g of 760.9 °C. The glass-ceramic coatings effectively maintained the NTC properties of the sensitive ceramics in all three formulations. Interestingly, the glass-ceramic coating 3# containing Y 2 O 3 demonstrated an increase in electrical resistance. Both the NTC thermistors coated with 1# and 2# glass formulations successfully passed 1000 thermal shock cycles without visible failures, and their resistance change ratios were well below the requisite 20%.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Mei Yan,Ru-Ling Tang,Wenlong Liu,Sheng-Ping Guo
Metal oxyhalides have attracted extensive attention as fascinating nonlinear optical (NLO) materials. Here, two barium niobium oxyfluorides, Ba3Nb2O2F12(H2O)2 (1) and Ba0.5NbO2F2(H2O) (2), have been obtained by regulating the O/F ratio in Nb–O–F units (NbOF6 pyramids to NbO4F2 octahedra). The overall NLO effect is improved from 1 to 2 with larger second-harmonic generation (SHG) intensities (0.9 to 1.7 × KH2PO4 (KDP)) and maintainable large band gaps (>3.0 eV) by regulating the O/F ratio in Nb–O–F units (1:6 to 4:2).
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