CHEMOSPHERE
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2021
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IF 7.086
Huanzhao Liu,Pengxin Li,Yifan Wang,Huijie Wang,Yi Fang,Zhonglu Guo,Yang Huang,Jing Lin,Long Hu,Chengchun Tang,Zhenya Liu
Toxic dyes in wastewater will become a significant hazard to human health if they are not treated effectively. Therefore, it is significant to separate and remove dyes from the aqueous solution. C and O co-doped BN (BCNO) with high adsorption capacity and outstanding cycle efficiency is a simple and efficient adsorbent for the cationic dye malachite green (MG). Glucose is characterized as an eco-friendly and cheap source of C and O. Benefited by the high specific surface area (1515.6 m 2 /g), the maximum adsorption capacity of MG is 1511.1 mg/g. Besides, the curves of adsorption fitting correspond to the Langmuir model and the pseudo-second-order model, respectively. Moreover, after 5 cycles, the adsorption efficiency reached 78% of the first time and the adsorption capacity remained above 780 mg/g. Furthermore, in the selectivity adsorption study, the cationic dyes (MG, neutral red (NR), methylene blue (MB)) can be removed more effectively in the binary dye system of MG-methyl orange (MO), NR-MO, MB-MO, MG-Orange II (OR), MB-OR, or NR-OR. BCNO-2 has a promising application in the removal of cationic dyes from complex dye wastewaters.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2019
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IF 3.571
Jin Feng,Yinghui Wu,Lixia Zhang,Ying Li,Songbai Liu,Hua Wang,Chunyang Li
A composite nanogel was developed for cyanidin-3-O-glucoside (C3G) delivery by combining Maillard reaction and heat gelation. The starting materials utilized were ovalbumin, dextran, and pectin. C3G-loaded nanogel was spherical with a diameter of ∼185 nm, which was maintained over a wide range of pH and NaCl concentrations. The composite nanogel enhanced the chemical stability of C3G under accelerated degradation models and a simulated gastrointestinal tract. Clathrin-mediated, caveolae-mediated, and macropinocytosis-related endocytosis contributed to the higher cellular uptake of nano-C3G than that of free-C3G. The apparent permeability coefficients of C3G increased 2.16 times after nanoencapsulation. The transcytosis of the C3G-bearing nanogel occurred primarily through the clathrin-related pathway and macropinocytosis and followed the “common recycling endosomes–endoplasmic reticulum–Golgi complex–basolateral plasma membrane” route. Moreover, nano-C3G was more efficient in restoring the viability of cells and activities of endogenous antioxidant enzymes than free-C3G in oxidative models, which may be attributed to the former’s high cellular absorption.
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高影响因子
ADVANCED POWDER TECHNOLOGY
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2019
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IF 3.25
Osman Ahmed Zelekew,Dong-Hau Kuo,Hairus Abdullah
Herein, we report the bimetallic (Sn,Zn)(O,S) oxysulfide nanocatalyst with a facile method. The Sn-based catalyst with the addition of Zn was synthesized with the proportions of 0, 20, 30 and 50% of Zn to Sn precursors for preparation. The catalysts were characterized by XRD , TEM , SEM XPS , and UV–vis instruments. The nanocatalysts were also tested for the detoxification of Cr +6 . The Sn-20 catalyst with 20 M percent of Zn(Ac) 2 ·2H 2 O showed an excellent performance for the induced photocatalytic reduction of Cr +6 under visible light irradiation at room temperature. The complete reduction of Cr +6 was achieved within 80 min by Sn-20 catalyst. However, 85.6, 97, and 94% of Cr +6 reductions were achieved within 80 min under visible light illumination by Sn-0, Sn-30, and Sn-50 catalysts, respectively. Hence, the bimetallic (Sn,Zn)(O,S) oxysulfide nanocatalyst will be a candidate and highly potential material for the detoxification of Cr(VI)-containing polluted water.
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SPECTROSCOPY LETTERS
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2019
·
IF 1.081
Jian-Li Liu,Yu-Chi Kong,Jing-Yi Miao,Yong-Lin He,Ruo-Chen Bi,Yin He,Xiang-Yu Cao
This study was aimed to reveal the binding mechanism between bovine hemoglobin and o-phenylenediamine by using molecular spectroscopy techniques and molecular modeling methods. The experimental results revealed that the fluorescence quenching mechanism was a combined dynamic and static quenching. The binding constant was (1.17 ± 0.02)×104 L/mol, and only a single binding site exists. The binding distance was 2.46 nm. The binding process was a spontaneous reaction, dominated by hydrophobic forces. The molecular docking simulations have also confirmed the results of the spectroscopic methods. The results reported here may significantly help understanding the interaction mechanism of o-phenylenediamine and hemoglobin.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Senchuan Huang,Yuying Meng,Yangfei Cao,Shiman He,Xiaohui Li,Shengfu Tong,Mingmei Wu
To realize clean and renewable energy conversion systems, such as fuel cells and water splitting devices, cost-effective and energy-efficient bifunctional metal-free electrocatalysts are highly needed. Herein, N-, O- and P-doped hollow carbons (NOPHCs) are successfully synthesized via pyrolysis of Co 2 P-containing polypyrrole (Co 2 P@PPY) precursors and removal of Co 2 P templates. The materials are proven to serve as efficient and stable metal-free bifunctional electrocatalysts toward hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) in basic media. Notably, NOPHC 10 -900, which is obtained using 0.10 g of Co 2 P as template and pyrolyzed at 900 °C, exhibits high electrocatalytic performance for HER with a small overpotential of 290 mV at −10 mA cm −2 , a low Tafel slope of 102 mV dec -1 , and a great long-term stability for 19 h. Moreover, it affords decent electrocatalytic performance for ORR, with positive onset potential, high electron-transfer number, good methanol crossover tolerance and outstanding durability. The excellent electrocatalytic performance is mainly due to the synergistic effect of the multi-heteroatoms dopants in it and the large density of active sites on the surface of the hollow carbons.
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ANALYTICAL CHEMISTRY
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2019
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IF 6.35
Dan Zhao,Juan Li,Chuanyun Peng,Shuyun Zhu,Jian Sun,Xiurong Yang
Inspired by the special reducing capability of ascorbic acid (AA), ascorbic acid 2-phosphate (AA2P) has been extensively utilized as a substrate in current alkaline phosphatase (ALP) activity assays owing to the ALP-triggered transformation of AA2P into AA. However, such assays usually require AA-related complicated and laborious synthesis and/or signal generation procedures. Herein, we report an interesting in situ fluorogenic interaction between o-phenylenediamine (OPD) and AA, which inspires us to put forward a novel and simple AA2P/OPD-participated fluorescence turn-on ALP activity assay for the first time, and then the corresponding ALP-based fluorescence enzyme-linked immunosorbent assay (ELISA) has also been developed by means of the conventional ELISA platforms. According to the convenient and facile detection process with clear response mechanism, our fluorogenic reaction-based assay exhibits good sensitivity, selectivity, and excellent sensing performance, which ensures fluorescence ELISA to potentially be applied in clinical diagnosis by employing a well-studied biomarker of hepatocellular carcinoma, α-fetoprotein (AFP) as the model analyte. Such original ELISA via in situ formation of fluorophore from scratch gives a new sight to develop other potential immunoassay platforms in early clinical diagnosis by controlling the target antigens in the near future.
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Catalysts
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2019
·Vol. 9
·期 3
·218
·
IF 3.444
Shaoxia Guo,Guilong Liu,Tong Han,Ziyang Zhang,Yuan Liu
Owing to the outstanding catalytic performance for higher alcohol synthesis, Ga-Co catalysts have attracted much attention. In view of their unsatisfactory stability and alcohol selectivity, herein, K-modulated Co nanoparticles trapped in La-Ga-O catalysts were prepared by the reduction of La1−xKxCo0.65Ga0.35O3perovskite precursor. Benefiting from the atomic dispersion of all the elements in the precursor, during the reduction of La1−xKxCo0.65Ga0.35O3, Co nanoparticles could be confined into the K-modified La-Ga-O composite oxides, and the confinement of La-Ga-O could improve the anti-sintering performance of Co nanoparticles. In addition, the addition of K modulated parts of La-Ga-O into La2O3, which ameliorated the anti-carbon deposition performance. Finally, the addition of K increased the dispersion of cobalt and provided more electron donors to metallic Co, resulting in a high activity and superior selectivity to higher alcohols. Benefiting from the above characteristics, the catalyst possesses excellent activity, good selectivity, and superior stability.Keywords:perovskite-type oxide (PTO);cobalt;gallium;potassium;higher alcohols;syngas
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JOURNAL OF CATALYSIS
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2019
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IF 7.723
Xiaoyue Wan,Qi Zhang,Mingming Zhu,Yi Zhao,Yongmei Liu,Chunmei Zhou,Yanhui Yang,Yong Cao
Site-selective deoxygenation of hydroxyl groups represents essential processes to access valuable functionalized bio-based compounds with industrial potential. One of the challenging tasks in this context is to convert biodiesel-derived glycerol in the presence of abundant water directly to 1,3-propanediol (1,3-PDO), a key component of the emerging polymer industry. Herein, a monometallic iridium supported on H-ZSM-5 in the absence of Re oxophilic metal oxides was prepared via grinding-assisted impregnation procedures and attempted as an effective and recyclable catalyst for the aqueous-phase selective hydrogenolysis of glycerol toward 1,3-PDO in the absence of acid additives. The results revealed the necessity to control the Ir domain dispersions, Ir 0 /Ir 3+ ratio and the amounts of overall acid/Brönsted acid sites. Activity depended linearly on the amount of overall and Brönsted acid sites, and 1,3-PDO selectivity increased in the presence of Ir-induced Brönsted acid sites, denoted as Ir-O(H)-H-ZSM-5. We speculate that Ir-O(H)-H-ZSM-5 are generated by the interfacial synergistic interaction between IrO x and H-ZSM-5 through hydrogen spillover and reverse hydrogen spillover according to the reported literatures. The reaction mechanism to elucidate the role of Ir-O(H)-H-ZSM-5 sites in glycerol hydrogenolysis was also postulated based on extensive characterization and catalytic reaction results.
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DYES AND PIGMENTS
·
2018
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IF 3.767
Xiran Yang,Simin Liu
The host−guest interactions between Auramine O ( AuO ) dye and cucurbit[ n ]uril (CB[ n ], n = 7, 8) were investigated in aqueous solution by 1 H NMR, UV/Vis, fluorescence spectroscopic techniques and single crystal diffraction. The results indicate the simultaneous formation of 1:1 and 2:1 inclusion complexes between CB[7] and AuO with two binding constants as 1.17 × 10 5 M −1 and 3.99 × 10 2 M −1 by UV/Vis spectroscopy titration (1.20 × 10 5 M −1 and 5.26 × 10 3 M −1 by fluorescence spectroscopy) in phosphate buffer (pH 7.4). And a 1:2 homoternary inclusion complex CB[8]· AuO 2 with binding constant as 2.95 × 10 9 M −2 (by fluorescence spectroscopy titration) is detected. Interestingly, the appearance of intense new broad emission band with big red-shift (100 nm) with respect to that of AuO proves the formation of excimer upon encapsulation of AuO molecules in CB[8]. Determination of single crystal structure of CB[8]· AuO 2 further discloses the existence of J-type dimer with intermolecular CH···π interactions between two included phenyl groups on AuO molecules. Upon host−guest complexation of AuO with CB[7] or CB[8], the p K a shifts of AuO were measured.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2019
·
IF 3.571
Jin Feng,Lujing Xu,Hua Wang,Songbai Liu
Novel Gemini dodecyl O-glucoside-based primary, secondary, and tertiary vesicles were developed in this work utilizing layer-by-layer deposition of polysaccharides (e.g., sodium carboxymethyl cellulose and chitosan), and their interaction with β-lactoglobulin (BLG) was carefully investigated. The increase of polysaccharide layers on primary vesicles led to a monotonic increase in size and consecutive reversal of surface charge. Polysaccharide deposition significantly retarded the vesicle aggregation and degradation of entrapped catechin laurate during storage. Steady-state fluorescence, isothermal titration calorimetry, and protein precipitation analyses revealed the surface charge dependence of the interactions between vesicles and a model milk protein BLG, which were much stronger when they were charged oppositely than when they presented the same type of surface charge. It was highlighted that the surface charge of vesicles could be tuned by differently charged coatings to accommodate to that of the milk proteins in the food matrix. This work will contribute to the practical application of niosomal vesicles loaded with bioactive compounds to fortify dairy products.
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FOOD CHEMISTRY
·
2019
·
IF 5.399
Hao Huang,Tarun Belwal,Halah Aalim,Li Li,Xingyu Lin,Songbai Liu,Caixia Ma,Qunhe Li,Ying Zou,Zisheng Luo
This study aimed to examine the modification effect of whey protein concentrate (WPC), WPC-gum arabic (WPC-GA) or WPC-high methoxyl pectin (WPC-PEC) complex to tailor-modify W/O/W emulsion for secondary microencapsulation of hydrophilic arbutin and hydrophobic coumaric acid. The stability and rheological properties of coated emulsions, encapsulation yield, release and degradation kinetics of arbutin and coumaric acid were investigated. Results revealed that WPC-PEC complex (at the ratio of 1:3) coating W/O/W emulsion exhibited the highest viscosity and stability, with the highest encapsulation yield of 91.08% for arbutin and 80.92% for coumaric acid, respectively. Tighter coating structure of the WPC-PEC complex (1:3) forming a stronger gel network structure was confirmed, accounting for the larger mean particle size of 569.67 nm. Moreover, the WPC-PEC (1:3) coating W/O/W emulsion also showed controlled release of arbutin and coumaric acid in simulated conditions. The k value of degradation kinetics for arbutin (7.99 × 10 −4 at pH = 1.2, 4.19 × 10 −4 at 90 °C and 7.52 × 10 −4 at UV-C treatment) and coumaric acid (5.18 × 10 −4 at pH = 1.2, 3.24 × 10 −4 at 90 °C and 6.90 × 10 −4 at UV-C treatment) indicated low degradation rate. The present study revealed that the WPC-PEC (1:3) coating W/O/W emulsion could provide a better synergistic effect on higher encapsulation yield and stability of arbutin and coumaric acid.
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POLYMER
·
2018
·
IF 3.483
Jin Han,Cheng Chen,Qingquan Xue,Yaochen Zheng,Shu Tian,Zhixiong Liu,Jieze Shen,Mingqiang Zhong
A catalyst-free and thermal-induced S→O acetyl migration (SOAM) reaction was occasionally found and used to fabricate the polythiol corrosion inhibitor . The route to prepare the polythiols was free of catalyst and side products. Only intramolecular migration process existed, while intermolecular migration was not found. Temperature-dependent 1 H NMR experiment showed the conversion rate of the SOAM reaction was 83% at 160 °C. Further heating at higher temperature or for longer reaction time, the conversion rate did not increase. It was speculated that there was equilibrium between two reversible migrations. The prepared polythiol inhibitor contains a large amount of latent thiol groups after the SOAM reaction process. The strong Cu S bonds immediately formed and made the polythiol chains firmly anchored on the copper surface when the copper metal was coated with the polythiols. Also S S bond formation reaction leads to dense crosslinking and film formation. Raman spectrum and SEM were used to characterized the protective film. A smooth and defect-free film with thickness of 1.9 μm was achieved when the copper sample was immersed in the polythiol solution for 60 min. The corrosion performance of the film is obtained by potential and impedance measurements and Tafel curves by immersing in a 3.5 wt% NaCl solution. All of the coated samples exhibited significantly lower corrosion rates than the bare copper sample, and the corrosion rate decreased as the immersion time increased. The inhibtion efficiency of the polythiol inhibitor was up to 99.3%. Neutral salt spray experiments indicated that the polythiol films provided excellent protection for over one week. The polythiols were also very stable in storage and have application in designing various polyacrylate polythiols resins.
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危险品化学品经营许可证（带存储）