APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Xiaobing Wang,Chengyu Wei,Xiaosheng Song,Zuohui Wang,Yong Zhao
In the oxygen evolution reaction (OER), the non-reversible destruction of surface electronic structure caused by the irregular element migration in complex surface/interface reaction limits the improvement of catalyst’s activity and stability. Herein, we successfully realize the control of ‘dual-path migration of metallic elements in OER’ to stepwise reconstruct the O-coordinated bi-metal heterodimer (M 1 -O-M 2 ) for electron density redistribution. By designing Fe@FeNi 3 @NiO-Fe 3 O 4 (F-FN-NFO) model electrode with stepwise surface treatment in OER process, the directional migration (from core to shell, path 1 ) and adjacent-surface migration of Fe atoms ( path 2 ) are both controlled to reduce the formation energy of Ni-O-Fe units, realizing strengthened electron transfer between heterogeneous metal centers. After the surface reconstruction, the OER activity of F-FN-NFO increases for 8.6 times at 1.7 V (30.5–263 mA cm −2 ). Based on this strategy, the designed three-dimension NiFe@NiFe x O is positive activated compared to traditional NiFe-oxidation with the overpotential reduced to 299 mV at 10 mA cm −2 .
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FOOD HYDROCOLLOIDS
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2023
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IF 10.7
Shahid Iqbal,Musa Kaleem Baloch,Shakil Abbas,Malik Jehanzeb Khurram,Rizwan Ahmed,Xiao Dong Chen
Despite the potential benefits of using cellulose ethers and their combination with other polysaccharides and proteins in the creation of reduced-fat water-in-oil (W/O) emulsions, research in this specific area is currently limited. Further studies are needed to explore the optimal combinations and concentrations of these materials to achieve emulsions with desired texture and higher rheological properties. To address this research gap, seven W/O emulsions with a 40 wt% water phase at pH 3.5 are prepared. The water phase consisted of 2 wt% methylcellulose (MC) or hydroxypropyl methylcellulose (HPMC) combined with 10 wt% whey protein isolate (WPI) and/or kappa-carrageenan (kC). The oil phase, comprising 60 wt%, contained 8 wt% polyglycerol polyricinoleate (PGPR) in soybean oil . The emulsions were initially prepared at room temperature and subsequently subjected to a heating process at an elevated temperature of 90 °C for a duration of 30 min. Following this heating step, the emulsions were then cooled back to room temperature. This sequential temperature treatment was employed with the intention of inducing aggregation and gelation within the emulsions. The temperature oscillation measurements (G* versus temperature) provide further evidence for the role of covalent and noncovalent bonding in the rheology and gelation of WPI-based emulsions. The viscosity and moduli of unheated and heated emulsions containing combinations of HPMC were found to be higher compared to those containing MC combinations. This behavior can be attributed to the stronger intermolecular interaction between HPMC, WPI, and/or kC, as well as their attachment with PGPR. These interactions lead to the formation of a more viscous and firmer W–O interface in emulsions.
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SOLVENT EXTRACTION AND ION EXCHANGE
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2023
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IF 2
Dong Cao,Shuai Wang,Xin Ma,Jia Yang,Hong Zhong
Herein, a novel C=O–NOH-contained compound was synthesized and used in the extraction and recovery of copper from sulfate solution. Dodecyl phenyl ethyl hydroxamic acid (DPEHA) exhibited high selectivity to Cu(II) over the competing ions, and the separation factors (β) obtained were βCu/Zn = 227.370, βCu/Co = 199.094, βCu/Ni = 188.889, respectively. The separation effect was stronger than that of 2-hydroxy-5-nonyl acetophenone oxime. Meanwhile, extraction capacity of 0.10 g Cu(II) per gram DPEHA was reached, and the extracted Cu(II) can be stripped effectively. The investigation of extraction mechanism revealed that O atoms in C=O and O-H groups of DPEHA operate as active sites, which could powerfully chelate with Cu(II) by forming stable five-membered rings. The high copper extraction efficiency and selectivity associated with a simple synthesis of DPEHA make it to serve as the potential selective Cu(II) extractant, which also provide a novel insight for the research and development of economical Cu(II) extractants.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Ziying Zhong,Yun Tang,Yanran Chen,Chunfang Wang,Faqiong Zhao,Baizhao Zeng
The widespread use of tetracycline unavoidably causes residue problems, hence its monitor in foods and environment is important. In this work, a simple but sensitive electrochemiluminescence (ECL) sensor is prepared for tetracycline detection. The sensor is constructed using TiO 2 nanoparticle, ZIF-5 loaded Ru(bpy) 3 2+ (Ru@ZIF-5), and molecularly imprinted poly-o-phenylenediamine. The TiO 2 NP acts as a co-reaction accelerator for tri-n-propylamine (TPrA) by producing electrons and holes at a certain potential to promote the production of TPrA . ZIF-5 has a large specific surface area and rich functional groups, thus can well immobilize a large amount of illuminant Ru(bpy) 3 2+ . The electrodeposited molecularly imprinted polymer acts as a recognition element. Due to the synergic effect of different components, the resulting ECL sensor shows a wide linear range of 10 nM–50 μM, high selectivity, low detection limit, and good stability. It can be used for the detection of tetracycline in food and environmental samples.
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FOOD CHEMISTRY
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2023
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IF 8.8
Yuming Wei,Jixin Zhang,Tiehan Li,Mengjie Zhao,Zhenshuo Song,Yujie Wang,Jingming Ning
An optimized yellowing process for yellow tea (YT) was recently developed. The study found that the optimized yellowing process caused a significant increase in sweet and floral aromas by 31.3% and 24.0%, respectively. A total of 21 aroma-active compounds were identified using gas chromatography-mass spectrometry (GC–MS) and gas chromatography–olfactometry (GC-O) combined with sensomics analysis. Quantification of the 15 aroma-active compounds and calculation of odor activity values (OAVs) showed that the OAVs of sweet and floral aroma compounds increased significantly by 986.2% and 46.4%, respectively, after the optimized yellowing process. Sensory-directed aroma reconstitution and omission experiments confirmed that dimethyl sulfide, 3-methylbutanal, β -ionone, β -damascenone, geraniol, phenylacetaldehyde, and linalool were the key odorants in YT after the optimized yellowing process. Odorant addition tests further demonstrated that β -damascenone (OAV 590.4) was the main odorant for YT sweet aroma enhancement, while β -ionone (OAV 884.6) was the main odorant for YT floral aroma enhancement.
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PubMed
高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Yang Yue,Chao Wang,Yashu Chen,Mingming Zheng,Yi Zhang,Qianchun Deng,Qi Zhou
Currently, the effect of varieties on the flavor and stability of flaxseed milk remains unknown. Therefore, this study was conducted to investigate the effects of different varieties on the stability, sensory, and aromas of flaxseed milk. 51 volatile compounds were identified in flaxseed milk using Stir Bar Sorptive Extraction-Gas Chromatography-Olfactometry-Mass Spectrometry (SBSE-GC-O-MS). Among them, 1-octen-3-ol, 2-methoxy-4-vinylphenol, and 2,3,5-trimethylpyrazine contributed higher relative odor active values (ROAV), resulted in the fruity, roasted, sweet, and cucumber in flaxseed milk. Isovaleraldehyde (green notes) was not detected in XHZM. However, other compounds such as 1-nonanol (floral), γ-nonanolactone and γ-octanoic lactone (coconut milk) had higher concentrations, causing a better sensory evaluation. Additionally, its stability was relatively good. The orthogonal partial least-squares regression (OPLS) model and VIP values showed that eight compounds were responsible for the sensory differences from different varietals. The study provided references to selection and understanding flavor composition basis of flaxseed milk.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jie Xiong,Hong-Yan Zeng,Chen-Fei Liu,Jin-Feng Peng,Zhuo-Lin Yang,Wan-Ying Ji
A new approach for constructing amorphous/crystalline heterophase W-Zn(Ti)O photocatalyst was develpoed via calcination topological transformation of the self-sacrificial WO 4 2− -pillared ZnTi-LDH (WO 4 -LDH) precursor together with in-situ W-doping. The amorphous/crystalline heterophase formation could expose enriched active sites, which promoted the transfer and separation of photogenerated e − - h + pairs. Density functional theory (DFT) calculations further verified that in-situ W-doping regulated the electronic structure and reduced bandgap energy, which made the transport of photogenerated carriers more rapid. Benefiting from the construction of the amorphous/crystalline heterophase, the W-Zn(Ti)O had suitable photo-oxidation/reduction activities, achieving 99.7% removal rate for Cr(VI) reduction, 78.1% for TC oxidation, and simultaneous Cr(VI) reduction (78.0% removal) and TC oxidation (63.2% removal) for 120 min under visible-light. This work provides a new idea for the design of amorphous/crystalline heterophase nanomaterials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Chunliu Zhu,Rui Long,Liyang Zhu,Wenyu Zou,Yafei Zhang,Zongying Gao,Jing Shi,Weiqian Tian,Jingyi Wu,Huanlei Wang
Zinc ion hybrid capacitors (ZIHCs) are encouraging energy storage devices for large-scale applications. Nevertheless, the electrochemical performance of ZIHCs is often limited by the cathode materials which show low energy density and rate capability practically. One of the efficient strategies to overcome these challenges is the development of advanced carbon cathode materials with abundant physi/chemisorption sites. Herein, we develop a sulfate template strategy to prepare sulfur and oxygen doped carbon nanosheets (SOCNs) as a potential cathode active material for ZIHCs. The as-prepared SOCNs exhibit porous architectures with a large surface area of 1877 m 2 g −1 , substantial structural defects, and high heteroatom-doped contents (O: 7.9 at%, S: 0.7 at%). These exceptional features are vital to enhancing Zn ion storage. Consequently, the SOCN cathode shows a high capacity of 151 mAh g −1 at 0.1 A g −1 , high cycle stability with 83% capacity retention at 5 A g −1 after 4000 cycles, and a superior energy density of 103.1 Wh kg −1 . We also investigate the dynamic adsorption/desorption behaviors of Zn ions and anions of the ZIHCs carbon electrodes during the process of charge and discharge by ex-situ experiments. This work highlights the significance of the integration with a large specific surface area and bountiful heteroatoms in carbon electrodes for achieving high-performance ZIHCs.
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JOURNAL OF THE ENERGY INSTITUTE
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2023
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IF 5.7
Han-Bing Gao,Yun-Peng Zhao,Bing-Hu Xie,Le-Le Qiu,Jian Xiao,Jing Liang,Jian Li,Fang-Jing Liu,Yue-Lun Wang,Jing-Pei Cao
Selective hydrogenolysis of C–O bonds in lignin is regarded as an important process to produce high value-added chemicals and biofuels. Herein, high-performance Ru-based catalysts (Ru/AC) supported on activated carbon (AC) derived from corncob waste were prepared by a simple impregnation method. The optimal 5%Ru/AC possessed enormous specific surface area, well-developed porosity, high metal dispersion, small Ru particle size and strong metal-support interaction, showing a marvelous catalytic performance in the hydrogenolysis of diphenyl ether, benzyl phenyl ether and phenylethyl phenyl ether with different kinds of C–O bonds under mild conditions. Besides, various phenolic compounds were selectively hydrogenated into cycloalkanols and cycloalkanes over 5%Ru/AC, indicating the excellent catalytic activity in aromatic ring hydrogenation of this catalyst. In addition, high conversion of diphenyl ether and high selectivity of monomeric products were well maintained after employing this catalyst at least three times. The construction and application of the ingenious 5%Ru/AC catalyst highlighted a promising approach to the value-added utilization of lignin-derived aromatic compounds.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Naymul Karim,Shiyu Liu,Ahmed K. Rashwan,Jiahong Xie,Jianling Mo,Ahmed I. Osman,David W. Rooney,Wei Chen
Anthocyanins are potential bioactive compounds with less bioavailability due to instability in physicochemical and physiological harsh environments. This study synthesized a “nanolipo-fibersomes (NLFS)” using Lipoid® S75 and Nutriose® FB 06 (dextrinization of wheat starch) through a self-assembly technique with probe sonication. We aimed to encapsulate delphinidin- 3-O -sambubioside (D3S) successfully and evaluate physicochemical and controlled release properties with improved antioxidant activity on palmitic acid (PA)-induced colonic cells (Caco-2 cells). D3S-loaded nanolipo-fibersomes (D3S-NLFS) were nanosized ( < 150 nm), spherical shaped, and homogenously dispersed in solution with promising encapsulation efficiency (~ 89.31 to 97.31 %). Particles formation was further verified by FTIR. NLFS were well-stable in thermal, storage, and gastrointestinal mimic environments. NLFS exhibited better-controlled release and mucoadhesive properties compared to nanoliposomes (NL). The NLFS showed better cellular uptake than NL, which was correlated to higher mucoadhesive properties. Furthermore, D3S-NLFS exhibited promising protective effects against PA-induced cytotoxicity, O 2 •− radicals generation, mitochondrial dysfunctions, and GSH depletion, while the free D3S was ineffective. Among D3S-loaded nanoparticles, D3S-NLFS 3 was the most efficient nanocarrier followed by D3S-NLFS 2, D3S-NLFS 1, and D3S-NL, respectively. The above data suggest that nanolipo-fibersomes can be considered as promising nanovesicles for improving colonic delivery of hydrophilic compounds with controlled release properties and greater antioxidant activity.
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ACS Catalysis
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2023
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IF 12.9
Yuxue Yue,Saisai Wang,Qi Zhou,Bolin Wang,Chunxiao Jin,Renqin Chang,Liqi Wan,Zhiyan Pan,Yihan Zhu,Jia Zhao,Xiaonian Li
It remains challenging to achieve nanoparticles with uniform size and dispersion or single atoms with identical coordination structure, although various methods have been developed to synthesize carbon-supported nanostructured catalysts. Typically, in the synthesis of vinyl chloride (VCM) by acetylene hydrochlorination, a limited understanding of the optimal architecture for carbon-supported Cu catalysts at the nanoscale greatly restrains their further development and application. To achieve this, Cu single-atom (Cu-O3P) with identical coordination environments and Cu/Cu3P nanoparticles with uniform size were tailored via advanced carbothermal shock method, and their catalytic structure–activity relationships were explored in the acetylene hydrochlorination reaction. In detail, a platform of nanostructured copper catalysts was constructed by the precursor-assisted carbothermal shock method, and the relationship between the coupling structure and electron properties of copper sites and their catalytic performance is correlated. Finally, we derived quantitative activity and stability descriptors that account for the d-orbital coupling and competitive adsorption effects observed in acetylene hydrochlorination. This work provides a precise and versatile approach for designing well-defined carbon-supported metal nanocatalysts and regulating their catalytic performance.
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Journal of Materials Chemistry C
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2023
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IF 6.4
Hong Li,Xiyan Li,Jiali Yu,Yadong Li,Zhigang Wang,Feng Bao,Caizhen Zhu,Jian Xu
As ultra large-scale integration (ULSI) circuits develop quickly, traditional polyimide (PI) urgently needs modification due to its high dielectric constant, to make it meet the requirements of ULSI development. In this study, the o-hydroxy polyimide structure was introduced into the PI main chain, and it was confirmed that the thermal rearrangement reaction of o-hydroxy polyimide could increase the molar volume of PI. Based on this property, this study successfully prepared low dielectric polyimide resins and meticulously investigated the effect of the rearrangement ratio on the properties of PI, especially the dielectric properties. The results show that the Dk of PI decreases significantly and the glass transition temperature (Tg) increases significantly with the increase of rearrangement ratio. Among them, it is worth mentioning that PBO-40 has the best performance, presenting a low dielectric constant (Dk = 2.54@10 GHz), low dielectric loss (Df = 0.00585@10 GHz), high heat resistance (Tg = 315 °C, 5% decomposition temperature (N2) Td5% = 509 °C) and low water absorption (Ma = 0.65%). In conclusion, this study provides learnable strategies for the design of high-frequency dielectric PIs.
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