FOOD CHEMISTRY
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2022
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IF 9.231
Hongdong Song,Qingyu Wang,Aijing He,Sen Li,Xiao Guan,Yawen Hu,Siyi Feng
Hordein nanoparticles have been successfully fabricated to encapsulate EGCG. The present study aimed to investigate the effect of hordein nanoparticles encapsulation on antioxidant activity, storage stability and in vitro release of EGCG. The antioxidant activities of EGCG before and after encapsulation by hordein nanoparticles had no significant difference. The 28-day storage experiments indicated that EGCG-hordein nanoparticles had a good storage stability in terms of average diameter and zeta potential. Meanwhile, the stability of EGCG was significantly improved by hordein nanoparticles encapsulation. The remaining amount of encapsulated EGCG was 1.31-fold and 1.52-fold higher than that of free EGCG at 4 °C and 25 °C, respectively. The release study in the simulated gastric or intestinal fluids suggested that hordein nanoparticles could slow down the release of EGCG in the simulated gastric or intestinal fluids. These results showed that encapsulation of EGCG using hordein nanoparticles could be a promising approach to improve its stability.
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PHYSICA B-CONDENSED MATTER
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2022
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IF 2.988
Xiaohong Pei,Shipeng Yang,Xinfeng Zhu,Erjian Sun,Xiaohan Hei,Zhongxian Song,Kai Liu
Development of multi-colour emitting phosphors for applications in LED is always a hot topic in rencent years. Herein, we prepared solid solutions K 2 Y 1- x - y Tb x Eu y Zr(PO 4 ) 3 and studied their luminescent properties. Both Tb 3+ and Eu 3+ emission peaks can be generated by using characteristic exciting wavelength of Tb 3+ (378 nm) due to the Tb 3+ →Eu 3+ energy transfer. By simply changing the relative proportions of Tb 3+ /Eu 3+ , the emitting color of phosphors K 2 Tb 1- y Eu y Zr(PO 4 ) 3 changes from green ( y = 0), through yellow ( y = 0.005) to red ( y = 0.08). Thermostability study showed that at 150 °C, the integral intensity is 57% of that at 25 °C, suggesting a good thermostability. Finally, we fabricated three LED lamps by using a 365 nm chip with y = 0, 0.005, 0.08 phosphors, and green, yellow and red light can be observed.
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Food Quality and Safety
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2022
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IF 3.949
Cai Chenggang,Chang Guoli,Zhang Nianhua,Wang Junlin,Wang Liyuan,Wu Pinggu,Yang Dajin
ObjectivesPolycyclic aromatic hydrocarbons (PAHs) and 3-monochloropropane-1,2-diol ester (3-MCPDE) were studied in camellia oil. It is important to study the changes in the content of PAHs and 3-MCPDE at different refining stages (from crude oil to the final refined oil product) to elucidate the influence of the refining procedures on their change.Materials and methodsThe PAHs and 3-MCPDE in camellia oil from different refining stages (from crude oil to the product) of a plant were analyzed by gas chromatography–mass spectrometry and calculated by the internal standard method.ResultsThe overall PAH content was (79.64±2.43) µg/kg in crude camellia oil. After refining treatment, the PAH content decreased to (18.75±0.55) µg/kg. The 3-MCPDE content increased during the refining process from 0 mg/kg in the crude oil to 4.62 mg/kg in the refined oil product.ConclusionsThis is the first study to simultaneously monitor changes in both PAH and 3-MCPDE contents during the production of camellia oil. These results confirmed the effectiveness of the refining method on PAH removal and the increase in 3-MCPDE at high temperature. It is suggested that novel processing methods or refining parameters need further optimization to decrease the overall concentrations of PAHs and 3-MCPDE in camellia oil.
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JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 35
·16965-16973
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IF 4.682
Wang Tao,Lu Yang,Xu Lin,Chen Zheng Jian
Surface-enhanced Raman scattering (SERS) has drawn attention to broad applications. Here, we investigate the SERS property of the π-conjugated poly(3-hexylthiophene-2,5-diyl) (P3HT) for molecule detection. The crystal structure of π-conjugated P3HT thin films is of the great significance to its SERS property. Our results show that the optimized crystal structure can significantly improve its SERS property. The SERS substrate has an excellent signal reproducibility (RSD < 10%). In addition, the SERS substrate still remains a good Raman enhancement after one year and shows excellent long-term stability compared with those of other types of SERS substrate. The result of our theory calculation shows that significant π-stacking of the probe molecules with the thiophene π-cores molecules plays an important role in the large SERS enhancement by the charge transfer mechanism. The increase in the crystallinity of the P3HT film can improve the charge transfer of the substrate molecules and the methylene blue (MB) molecules via more effective chemisorption of the probe molecules with the substrate molecules. The study contributed to the rational design of the organic semiconductor polymer SERS substrate with high sensitivity, selectivity, and long-term stability. Graphical abstract
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FOOD CHEMISTRY
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2022
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IF 9.231
Shurong Wang,Haohao Wang,Shuqin Liu,Hongyuan Guo,Junlong Meng,Mingchang Chang,Suozhu Wu
A novel electrochemical method for detecting fluoride was developed based on gold electrode modified by layer-by-layer (LBL) assembly of poly(3-aminophenylboronic acid)-reduced graphene oxide (PAPBA-RGO) multilayers. The PAPBA-RGO multilayer-modified gold electrode was constructed by using alternating LBL assembly of RGO and PAPBA on a bare gold electrode by one-step electrodeposition. Fluoride was electrochemically determined based on the proposed modified electrode by evaluating the changes in peak current for potassium ferricyanide reduction caused by the conjunction of fluoride and boronic acid groups of PAPBA. The results indicated that the peak current for potassium ferricyanide reduction obviously decreased with the increasing fluoride concentration. The response range of our method for fluoride was 1 × 10 –8 to 1 × 10 –1 M with a detection limit of 6 × 10 –10 M and high sensitivity and selectivity. This method was applied to detect fluoride in tap water, rice, apple, and edible fungi samples.
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Journal of Physical Chemistry C
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2022
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IF 4.177
Jiarui Zhao,Junhong Fu,Jian Wang,Kaixin Tang,Qi Liu,Jiahui Huang
The Pd/TiO2 catalysts with varying Pd nanoparticle sizes are used to study the control of selectivity toward the hydrogenation of 3-nitrostyrene (3-NS). Our results show the selectivities of 3-vinylanilline (3-VA) rise by decreasing the particle size, while the selectivity of 3-ethylnitrobenzene (3-EN) is the opposite. However, over the Pd/SiO2 catalysts, 3-EN moieties are the dominant product regardless of their differences in particle size. We find that the electronic interactions between Pd NPs and the TiO2 support rise by decreasing particle size, as a result, creating more admetals on the Pd NPs in contact with TiO2, which favorably adsorb the nitro group of 3-NS, thus resulting in enhanced selectivity of 3-VA. However, the classical strong metal–support interactions (SMSI) induced by reduction at elevated temperatures play no significant role in the controlling of selectivities of 3-VA and 3-EN. The SiO2-supported Pd NPs without electronic metal–support interactions (EMSIs) prefer the reduction of the vinyl group of 3-NS. This work underlines the importance of EMSI governing the selectivity for hydrogenation of unsaturated nitroarene reactions.
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Journal of CO2 Utilization
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2022
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IF 8.321
Nicui Yuan,Yuxin Mei,Yuwei Liu,Yating Xie,Baining Lin,Yonghua Zhou
The development of efficient and highly selective photocatalysts is a key point for the photocatalytic conversion of CO 2 . In this paper, a composite catalyst UiO-66-NH 2 /Ce(HCOO) 3 (simplified to UNH/Ce(HCOO) 3 ) was fabricated by one pot method with CeCO 3 OH as the precursor. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations results confirmed that UNH was dispersed on the surface of Ce(HCOO) 3 and strongly interacted with it via Ce-N bond. The yield of CH 4 on the optimal UNH/Ce(HCOO) 3 catalyst reached 3 times of that on pristine UNH, up to 128.81 μmol g −1 , with the CH 4 selectivity of 71.9 %, and the R electron reached 286.46 μmol g −1 h −1 . The UV–vis diffuse reflection spectra and photoelectrochemical tests results confirmed that the improved photocatalytic CO 2 reduction performance and high CH 4 selectivity could be attributed to the formation of the type-Ⅱheterojunction of UNH/Ce(HCOO) 3 with abundant Ce 3+ , which expanded the visible light absorption range, accelerated the separation and transfer rates of photogenerated charges, and thus efficiently promoted the multi-electron reduction reaction of CO 2 to CH 4 . In addition, the reaction temperature affected profoundly the cycle performance of the catalyst. The results presented here illustrated the possibility for improving the stability of UNH/Ce(HCOO) 3 -1.80 by decreasing reaction temperature.
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Materials Today Energy
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2022
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IF 9.257
Can Luo,Ruyun Qiu,Gen Li,Xiaojun Shi,Zhifei Mao,Rui Wang,Jun Jin,Beibei He,Yansheng Gong,Huanwen Wang
Sodium-ion hybrid capacitors (SIHCs) are promising technology for energy storage because they combine the merits of high-energy batteries and high-power capacitors as well as naturally abundant sodium resource. However, conventional SIHCs consume a mass of electrolyte during the charge process, thus generating some side reactions at high potentials. In this work, we report a novel rocking-chair SIHC using Na 3 V 2 (PO 4 ) 3 /carbon composite nanofibers (denoted as “NVP@CNF”) as binder-free cathodes and SiO 2 -templated hollow carbon nanofibers (HCNF) as the capacitive anode. Resulting from the unique carbon-encapsulation configuration, the NVP@CNF cathode demonstrates excellent rate capability (105.8 mAh/g at 0.5C; 66.9 mAh/g at 100C) and long-term cycling stability (98% capacity retention after 2000 cycles) in sodium half-cells. The as-fabricated HCNF||NVP@CNF SIHC device delivers a high energy density of 216.4 Wh/kg at a power density of 381.8 W/kg. Even at an increased power density of 15272.7 W/kg, the energy density is still as high as 123.0 Wh/kg (based on the total mass of active materials in both electrodes). These results provide a new route to design various flexible self-supporting composite fiber electrodes through a simple electrospinning encapsulation strategy, which finally pushes the development of next-generation hybrid energy storage devices.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xiaohui Wu,Qin Zhang,Fangyi Huang,Xingyu Huo,Fuyu Li,Yulan Jing,Yuanxun Li,Hua Su
In this work, a new low loss Ba 3 Ti 4- x (Mn 1/3 Nb 2/3 ) x Nb 4 O 21 (MN-BTN, 0 ≤ x ≤ 12 mol%) ceramics configuration was presented through preparing by the solid-state route. The XRD patterns, Rietveld refinement , microstructure, and microwave properties were systematically analyzed. All the fabricated MN-BTN ceramics belonged to the hexagonal structure with a P 6 3 / mcm space group. More specifically, the 6MN-BTN ceramic exhibited a high relative density of ~92.3 %, homogeneous grains distribution with an average size of ~71.95 µm, and several excellent microwave dielectric properties : ε r = 59.67, Q× f = 16,226 GHz, τ f = +103.9 ppm/℃ sintered at 1220 ℃. The incorporation of 1.5 wt % BaCu(B 2 O 5 ) (BCB) compound within the 6MN-BTN ceramic not only effectively reduced the sintering temperature from 1220 ℃ to 950 ℃, but also the excellent microwave dielectric properties were maintained: ε r = 42.33, Q× f = 11,300 GHz, τ f = +24.7 ppm/℃. Interestingly, the 6MN-BTN + 1.5 wt % BCB ceramic showed better chemical compatibility with Ag. The proposed 6MN-BTN + 1.5 wt % BCB ceramic configuration could be regarded as a promising material for LTCC applications.
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FOOD SCIENCE AND TECHNOLOGY RESEARCH
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2021
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IF 0.668
Zhe Zheng,Mingwu Qiao,Zhongwei Zhang,Chang Li
The effects of three phytosterols (β-sitosterol, stigmasterol, and campesterol) on the formation of 3-monochloropropane-1,2-diol (3-MCPD) esters and the possible mechanism were investigated in this study. Model reaction with 1,2-dipalmitoyl-sn-glycerol (DPG) and sodium chloride as the reacting precursors was adopted to investigate effects of three phytosterols on the formation of 3-MCPD esters. The results showed that three phytosterols exhibited inhibiting activity on the formation of 3-MCPD esters in the model reactions. ESR signal detection indicated that the phytosterols suppressed the formation of free radical in the model reactions. In addtion, 3-chloro-Δ5-cholestenes were detected in the reaction models by using UPLC-APCI-MS. It suggested that phytosterols reacted with chloride and transformed to 3-chloro-Δ5-cholestenes. Therefore, the possible mechanism of phytosterols inhibiting the formation of 3-MCPD esters could be proposed that phytosterols suppressed formation of free radical intermediates in model reactions and competed with DPG for chloride ion to reduce the formation of 3-MCPD esters.
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CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Qinxue Yang,Ying Yan,Xiaofang Yang,Guiying Liao,Jie He,Dongsheng Wang
The possible effect of complexation of tetracycline (TC) with metal ions on the degradation of TC by homogeneous activated peroxymonosulfate (PMS) was investigated. The oxidation kinetics of TC indicated the differences in PMS activation ability by Fe 2+/3+ and Ru 3+ . Fe 2+/3+ could activate PMS to generate HO• and SO 4 - • as is known, while Ru 3+ promoted the generation of 1 O 2 from PMS, though 1 O 2 may be not the only and dominant oxidant. The stronger complex ability of Ru 3+ and Fe 3+ with TC than Fe 2+ contributed to the enhanced oxidation of TC in Fe 3+ /PMS and Ru 3+ /PMS systems. The complexation facilitated TC degradation possibly due to the electron reconfiguration of metal ions and TC, such as reduce the stability of -C–C- double bands in TC structures and made it more vulnerable. The complexation reactions were commonly occurred but ignored in metal species activated PMS systems, the findings in this study suggested that the interaction between metal ions and organic contaminants should be reconsidered and utilized in the development of AOPs.
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CARBOHYDRATE POLYMERS
·
2021
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IF 9.381
Xianglin Pan,Haoyu Wang,Ziming Zheng,Xiao Huang,Linlin Yang,Junxi Liu,Kaiping Wang,Yu Zhang
Ulcerative colitis (UC) is an inflammatory bowel disease that affects the colon and rectum. Although galectin-3 (Gal-3) has been reported to play a proinflammatory role in UC, it is unknown whether pectic polysaccharide , a Gal-3 inhibitor in tumor metastasis, can alleviate UC by inhibiting Gal-3. The aim of this study was to investigate the anti-inflammatory effects and underlying mechanisms of SCLP, a pectic polysaccharide purified from Smilax china L. in our previous work, on dextran sulfate sodium-induced UC in BALB/c mice. The results showed that SCLP could significantly improve symptoms, alleviate histopathological damage and reduce the secretion of inflammatory mediators in mice with UC. Analysis of the anti-colitis mechanisms indicated that SCLP could inhibit the Gal-3/NLRP3 inflammasome/IL-1β pathway by suppressing the expression of Gal-3 and the interaction of Gal-3 and NLRP3 . Our results suggested that SCLP could be a promising candidate for prevention and treatment of UC.
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