DESALINATION
·
2023
·
IF 9.9
Xinxin Wei,Kaiming Fan,Peng Cheng,Yanling Liu,Shengji Xia
Simultaneous enhancement in the removal of organic micropollutants (OMPs) and water permeance is highly desirable for nanofiltration (NF)-based drinking water treatment . This study employed two cyclodextrin derivatives with different functional groups, i.e., (2-hydroxypropyl)-β-cyclodextrin (HP-β-CD) and sulfobutylether-β-cyclodextrin (SBECD), as aqueous additives for polyamide (PA) membrane fabrication. Characterization results revealed that HP-β-CD tended to enrich piperazine (PIP) monomers through hydrogen bonding, resulting in a thin but dense PA layer. Conversely, SBECD moderated PIP diffusion through electrostatic forces and steric hindrance , participated more in the interfacial polymerization reaction and yielded an active layer with a coexistence of polyester and polyamide. Both the CD derivative modified membranes exhibited improved surface hydrophilicity , enhanced roughness, and reduced active layer thickness, leading to over 60 % water permeance improvement without the obvious variation of pore size. This enabled the optimal membranes, especially the HP-β-CD incorporated one, highly advantageous in overcoming the trade-off effect between water permeance and OMP rejection. Meanwhile, the strongly negatively charged SBECD modified membrane showed reduced rejections for divalent cations, making it more resistant to scaling. This study offers an efficient approach to tailoring membrane water/solute selectivity and solute/solute selectivity, which has great potential in NF membrane development for drinking water treatment.
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ChemistrySelect
·
2023
·Vol. 8
·期 29
·e202301752
·
IF 2.1
Shuiqing He,Hong Yuan,Xiang Yang
Graphical Double-layer hollow porous carbon microspheres (DPCMs) were synthesized by hydrothermal method using sucrose as carbon source, SnCl 4 ⋅ 5H 2 O as the porogen, sodium dodecyl sulfate as the anionic surfactant, and sodium polyacrylate as dispersant. Double-layer hollow porous carbon microspheres (DPCMs) with high specific surface area (up to 57.3 m 2 /g) were synthesized by a hydrothermal method using sucrose as the carbon source, SnCl4 ⋅ 5H 2 O as the porogen, and sodium dodecyl sulfate and sodium polyacrylate as the anionic surfactant and dispersant, respectively. The thickness and morphology of the inner and outer layers of the DPCMs (spherical, bowl-like, mushroom-like, or ellipsoidal) could be adjusted by changing the hydrothermal conditions. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared analysis (FTIR) showed that the surface of the DPCMs was rich in −OH and −COOH functional groups, which was beneficial for subsequent chemical modification of the DPCMs. Because the prepared DPCM had a reactive surface layer and a stable carbonaceous double-layer structure, the material could be used in supercapacitors and biochemistry, and as catalyst carriers, adsorption materials, and electrode materials, among other applications.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Xinliang Mei,Xingyu Wang,Wenshuai Huang,Jiaxing Zhu,Kecheng Liu,Xingsheng Wang,Wei Cai,Ruiyin He
The monitoring and the rapid quantification of pesticides and their residues are becoming increasingly important in the field of food safety. Herein, the polycaprolactone/polypyrrole/β-cyclodextrin (PCL/PPy/β-CD) flexible sensor was developed for the electrochemical determination of new neonicotinoid insecticide Dinotefuran (DNF). The morphology, structure, and hydrophilicity of PCL/PPy/β-CD sensor probes were characterized by SEM, FTIR spectroscopy and static contact angle test. Under optimum conditions, the fabricated PCL/PPy/β-CD sensor exhibited excellent electrochemical sensing performance for DNF with a low detection limit of 0.05 μM in the linear concentration range from 0.2 μM to 50 μM and high sensitivity 14.07 μA·μM −1 ·cm −2 , which attributed to the two-stage porous structure, good electron transfer rate and the adsorption effect. The PCL/PPy/β-CD sensor also showed reproducibility (RSD = 4.76%), stability, and high selectivity towards DNF. In addition, a real samples investigation in rice with recoveries of 96.67 % ∼ 103.65 % implied the good application potential of PCL/PPy/β-CD in DNF monitoring.
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Food Bioscience
·
2023
·
IF 5.2
Shijin Xiong,Dandan Qiu,Xiaoyan Xu,Tonghao Du,Zhen Peng,Muyan Xiao,Tao Huang,Jinqing Huang,Hongbing Ren,Mingyong Xie,Tao Xiong
Laotan Suancai is a well-known Chinese traditional fermented vegetable with a unique flavor. However, there are significant differences in the quality of Laotan Suancai pickled by jars (LTSC-J) and pools (LTSC-P) on an industrial scale. To reveal the effect of fermentation craft on Laotan Suancai quality, the microbial community, flavor metabolites, and physicochemical properties of the two types of Laotan Suancai, as well as their interrelationship were investigated. LTSC-P had higher salinity, glucose content, and histidine content, while LTSC-J had higher TA, lactic acid content, and isobutyric acid content. Nine differential aroma-active compounds were found between the two types of Laotan Suancai: anethole , eucalyptol, diallyl sulfide, estragole, diallyl disulfide , eugenol, linalool, nonanal , and ethyl butyrate. LTSC-P showed a higher relative abundance of Weissella , Acinetobacter , Pseudomonas , Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium , Inhella , and Leuconostoc compared to LTSC-J. Co-occurrence analysis indicated the distinct differences in the co-occurrence patterns of the microbial network across the two types of Laotan Suancai. RDA analysis indicated that glucose, salinity, TA, maltose , and nitrite were the main drivers for the differences in bacterial communities between the two types of Laotan Suancai. Spearman correlation analysis revealed strong correlations between 18 bacteria and 61 flavor compounds. Finally, bacterial metabolic function prediction indicated that sulfide and aromatic ester may be biosynthesized by sulfur metabolism , cysteine and methionine metabolism, pyruvate metabolism, and butanoate metabolism. Overall, these findings provide important guidance for improving the manufacturing and quality of Laotan Suancai.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 7
·1-8
·
IF 5.7
Huang Yan,Sun Xuyuan,Yang Jing,Cao Zhiyuan,Wang Rujie,Li Li,Ding Yaping
A molecularly imprinted electrochemical sensor was designed for the selective determination of gatifloxacin (GTX) based on dual functional monomers. Multi-walled carbon nanotube (MWCNT) enhanced the current intensity and zeolitic imidazolate framework 8 (ZIF8) provided a large surface area to produce more imprinted cavities. In the electropolymerization of molecularly imprinted polymer (MIP), p-aminobenzoic acid (p-ABA) and nicotinamide (NA) were used as dual functional monomers, and GTX was the template molecule. Taking [Fe(CN) 6 ] 3−/4− as an electrochemical probe, an oxidation peak on the glassy carbon electrode was located at about 0.16 V (vs. saturated calomel electrode). Due to the diverse interactions among p-ABA, NA, and GTX, the MIP-dual sensor exhibited higher specificity towards GTX than MIP-p-ABA and MIP-NA sensors. The sensor had a wide linear range from 1.00 × 10 −14 to 1.00 × 10 −7 M with a low detection limit of 2.61 × 10 −15 M. Satisfactory recovery between 96.5 and 105% with relative standard deviation from 2.4 to 3.7% in real water samples evidenced the potential of the method in antibiotic contaminant determination. Graphical abstract
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ChemPlusChem
·
2023
·Vol. 88
·期 7
·e202300238
·
IF 3.4
Xingkai Peng,Xiaowei Zhao,Yuekun Hu,Lingli Guo,Yan Liu,Xiaofei Yu,Xiaojing Yang,Xinghua Zhang,Zunming Lu,Lanlan Li
Graphical By adding Zn(OAc) 2 into an amino-enriched reactant system , simultaneous optimization of both porous structure and N-doping process was achieved during the synthesis of porous carbon by the hard template method. The fabricated Zn(OAc) 2 -DCD/HPC catalysts showed excellent ORR activity in alkaline electrolytes. Nitrogen-doped carbon is considered one of the most promising oxygen reduction catalysts due to its low cost and high activity, however, it still falls short of Pt/C. In this study, we report a strategy for the preparation of highly reactive N-doped hierarchical porous carbon by primary pyrolysis using zinc acetate as a stand-alone zinc source and amino-rich reactants as carbon and nitrogen sources to introduce Zn-N x structures into mesoporous structures generated by the hard template method using the strong coordination of zinc and amino groups. Benefited from the simultaneous optimization of the hierarchical porous structure and nitrogen-doping, the half-wave potential of Zn(OAc) 2 –DCD/HPC is as high as 0.909 V vs. RHE, much better than that of commercial Pt/C catalysts (0.872 V vs. RHE). In addition, zinc-air batteries assembled with Zn(OAc) 2 –DCD/HPC (P max =198 mW cm −2 ) as the cathode exhibit higher peak power density compared to Pt/C (P max =168 mW cm −2 ). This strategy might open up new opportunities for designing and developing highly active metal-free catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Senyang Song,Xiaoyan Ma,Wenyue Li,Boyuan Zhang,Bo Shao,Xiaoyu Chang,Xiaoju Liu
With the development of power supplies for wearable devices , electrode materials with dual functions have received extensive attention. Herein, we report a strategy of preparing stylophora coral-like Ni/Co bimetal metal organic framework (MOF) with furan-based derivatives as ligands through the simple solvothermal method, which can be utilized as a dual-function electrode material to build supercapacitors and non-enzymatic glucose sensing. It can be found that the high molecular stacking properties of the rigid furan ring skeleton combined with the unique stylophora coral-like morphology can greatly improve the charge transfer efficiency of the electrode reaction process, and the structure of the bimetallic node can effectively adjust the three-dimensional electronic structure, making high capacitive performance during charge storage. The specific capacitance of the furan-based bimetallic MOF material is as high as 531 C g −1 at a current density of 1 A g −1 with a high capacitance retention rate of 83.4% after 5000 cycles. In addition, the glucose sensing performance is analyzed and an outstanding sensitivity value of 366 µA mM −1 cm −2 is achieved with a low limit of detection (2 μM). The as-synthesized furan-based bimetallic MOF material is a promising candidate for electrochemical supercapacitors and efficient glucose detection.
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DESALINATION
·
2022
·
IF 11.211
Peng Cheng,Yanling Liu,Xiaoping Wang,Kaiming Fan,Pan Li,Shengji Xia
Interlayered thin-film nanocomposite (TFN) membranes have been proven to achieve enhanced water permeance for desalination applications , while those lacking effective control over the construction of interlayers were prone to unsatisfactory permselectivity . In this study, a high-performance TFN membrane was constructed via interfacial polymerization on a Metal-Organic Frameworks (MOFs)-interlayered polyethersulfone substrate. Regulating the thickness of the MOFs (copper-tetrakis(4-carboxyphenyl) porphyrin , Cu-TCPP) interlayer could effectively tailor the structural parameters (effective filtration area, selective layer thickness, and pore size) and physicochemical properties of the membrane. A resistance-in-series model was applied to analyze the hydraulic resistance distribution and the specific value of the intrinsic solution permeability of each layer of the TFN membranes. Results showed that the interlayer with a proper deposition density of MOFs nanosheets could simultaneously increase the cross-linking degree by adsorbing the PIP monomers and reduce the thickness of the PA layer to enhance the intrinsic permeability . The optimal membrane with a thin PA film (20 nm) displayed an excellent water permeance of 32.7 L·m −2 ·h −1 ·bar −1 and an ultrahigh NaCl/Na 2 SO 4 selectivity of 271.7. Moreover, the membrane demonstrated remarkable stability during 120 h filtration. This work provides a promising strategy for fabricating TFN membranes with higher selectivity and enhanced comprehensive performance.
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CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 41
·期 1
·57-63
·
IF 5.56
Ziwei Su,Xiangxiang Zhang,Weichen Wang,Mingdong Dong,Xiaojun Han
Comprehensive Summary The bottom-up construction of self-powered artificial cells is significant to understand the energy supply and metabolism of nature cells. Here, we demonstrate an efficient manner to build thylakoid-containing artificial cells, which continuously convert light energy into chemical energy to supply adenosine 5’-triphosphate (ATP) under light illumination. The production of ATP supplies energy to promote the biological enzyme cascade reactions, where glucose is transformed into glucose 6-phosphate (G6P) under the catalysis of hexokinase (HK). G6P was further converted to gluconolactone 6-phosphate (PG) in the presence of 6-phosphate dehydrogenase (G6PDH), meanwhile NADP + was converted to nicotinamide adenine dinucleotide phosphate (NADPH). The self-powered artificial cells were demonstrated to generate ATP and NADPH successively, which provided a way for building more complicated artificial cells.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiuying Liu,Fei Xia,Shaoen Zhang,Yuanyuan Cheng,Ling Fan,Si Kang,Xue Gao,Xiaofei Sun,Jianrong Li,Xuepeng Li,Lijie Zhu
Nitrofurans such as furaltadone and nitrofurantoin are a type of synthetic broad-spectrum antibiotics. Various fluorescent nanomaterials have been used as labeling materials in immunochromatographic assays (ICAs) for nitrofurans detection. However, previous fluorescent nanomaterials can undergo aggregation-caused quenching, leading to a decrease in the detection sensitivity. In this study, we developed a multiplex immunochromatographic assay (mICA) based on dual-color aggregation-induced emission nanoparticles (AIENPs) as signal labels for the simultaneous detection of 3-amino-5-morpholino-methyl-1,3-oxazolidinone (AMOZ) and 1-aminohydantoin (AHD), which were the metabolites of furaltadone and nitrofurantoin, respectively. Under optimal conditions, the cut-off values of the mICA for derivatized AMOZ (2-NP-AMOZ) and AHD (2-NP-AHD) reached up to 3 and 5 ng/mL, respectively. These values are at least 166-and 200-fold higher than those of the commercial gold nanoparticles (GNPs)-based test strip, respectively. Furthermore, the test strip was successfully applied to the samples, with acceptable recoveries in the range of 83.0–98.2%.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Chunling Chen,Yijun Pan,Yifei Niu,Dengfeng Peng,Wenjing Huang,Wangyang Shen,Weiping Jin,Qingrong Huang
Oil body (OB) is the lipid-storage organelle in oilseed, and its stability is crucial for oilseed processing. Herein, effects of roasting and boiling on the structure, stability, and in vitro lipid digestion of Camellia OB were studied. The interfacial structure and physical stability of the extracted OB were investigated by electrophoresis, confocal-Raman spectroscopy, zeta-potential, and surface hydrophobicity, etc . Boiling caused protein loss on the OB surfaces, forming a stable phospholipid interface, which resulted in coalescence of the droplets (d > 100 μm) and negative ζ-potential (-3 ∼ -8 mV) values at a pH of 2.0. However, roasting partially denatured the proteins in the seeds, which were adsorbed on the OB surfaces. The random coil structure of interfacial protein increased to ∼20 % after thermal treatment. Besides, heating decreased the surface hydrophobicity of OB and improved lipid digestion. After boiling 60 min, the extent of lipolysis increased from 41.7 % (raw) to 57.4 %.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Yaqin Wang,Lingjia Fan,Jintao Huang,Jingjing Liang,Xingnan Wang,Yichen Ren,Hongcai Li,Tianli Yue,Zhenpeng Gao
To prepare pumpkin juice (PJ) rich in coenzyme Q10, this study analyzed the chemical composition, antioxidant activity, and gut microbiota of pumpkin juice fermented by Rhodobacter sphaeroides (RPJ). The number of viable bacteria in the juice reached 2.8 × 10 8 CFU/mL; the fermentation process mainly consumed glucose and sucrose; the total sugar content was reduced, β -carotene was reduced, and a new antioxidant substance, coenzyme Q10, appeared at a content of 12.345 mg/L; levels of volatile alcohols, esters, and ketones significantly increased; and antioxidation ability improved, particularly the ferric ion reducing antioxidant power activity. The gut microbiota of mice shifted by increasing Lactobacillus and Bifidobacterium and protected the gut barrier by reducing Proteobacteria after 48 h of fermentation. Pumpkin juice fermented by Rhodobacter sphaeroides not only produces bioactive substances with antioxidant capacity but can also regulate the gut microbiota of mice.
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危险品化学品经营许可证（带存储）