CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Lin Liu,Junpeng Shi,Yiang Li,Shanshan Peng,Hongyun Zhong,Liang Song,Yun Zhang
Persistent luminescent material (PLM) is promising candidate in anti-counterfeiting field. Specifically, Ultraviolet (UV) PLM without visible persistent luminescence (PersL) can realize information encryption with high concealment and security. However, UV-PLM has not yet been applied in anti-counterfeiting owing to the lack of invisible UV-PLM. Herein, we, for the first time, report a novel invisible ultraviolet-B (UVB) PLM and applied in advanced anti-counterfeiting and encryption field, exhibting its unique advantages. First, we prepared a novel series of UV-PLM, Mg 2 Ln 2 Ge 3 O 11 :Bi 3+ (Ln = Gd, La, Y, and Lu) and then realized the tuning of PersL from 350 to 310 nm via element substitution. Specifically, Mg 2 Lu 2 Ge 3 O 11 :Bi 3+ (MLG) can emit dim visible photoluminescence under 254 nm excitation and produce UVB-PersL without visible region after the excitation was ceased, which caused it appear like an ordinary fluorescent powder. Interestingly, the invisible UVB-PersL can be detected using a camera realizing the information encryption with high concealment. Moreover, owing to its unique optical properties, mixing MLG with different colors of fluorescent powder endows it with the ability to camouflage. Based on MLG, we designed a triple-mode information encryption method and demonstrated its unique advantages in the field of advanced anti-counterfeiting.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Haoyang Yao,Nianbing Zhong
The development of traditional photocatalytic fuel cell (PFC) is severely hindered by poor visible-light response and limited reaction space. In this study, a visible-light responsive PFC with g-C 3 N 4 /BiOI/Ti photoanode was proposed and applied to activate peroxymonosulfate (PMS) to degrade rhodamine B. The degradation rate, maximum power density and maximum photocurrent density of the PMS/PFC system were respectively 95.39%, 103.87 μW cm −2 and 0.62 mA cm −2 , which was respectively 1.28, 2.18, and 1.98 times that of PFC. The excellent performance is attributed to the production of more reactive oxygen species and the extension of the reaction space range after the activation of PMS. The activation pathway of PMS and charge transfer pathway of the photoanode were discussed in detail, and it was proposed that PMS was activated by Z-scheme heterojunction g-C 3 N 4 /BiOI/Ti photoanode.
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PubMed
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FOOD CHEMISTRY
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2021
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IF 7.514
Yingying Sun,Wan Li,Liqing Zhao,Fengyong Li,Yunfei Xie,Weirong Yao,Wenqiu Liu,Zhaosheng Lin
In food safety assessment, surface-enhanced Raman spectroscopy (SERS) is a novel detection method with the advantages of being fast, easy, and of high sensitivity. However, many SERS substrate synthesis methods are complex, and there are only a few studies on the simultaneous detection of multiple substances. In this study, a new, simple, low-cost SERS substrate was synthesised for the first time to simultaneously detect illegal food additives rhodamine B and basic orange II in chilli products. A lightweight, porous, and low-cost material of melamine foam (MF) was employed as the SERS synthesis template. The substrate’s SERS effect on, and sensitivity to, rhodamine B and basic orange II were demonstrated. The molecular vibration and SERS enhancement mechanisms of the two target molecules were analysed by density functional theory (DFT) calculations. The results reveal that this fabricated substrate has great application potential for the supervision and testing industry.
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PubMed
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INDUSTRIAL CROPS AND PRODUCTS
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2021
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IF 5.645
Zhuoheng Zhong,Shengzhi Liu,Songling Han,Yaohan Li,Minglei Tao,Amin Liu,Qiang He,Sixue Chen,Criag Dufresne,Wei Zhu,Jingkui Tian
Indole alkaloids from Catharanthus roseus (L.) G. Don were valued for their wide spectrum of pharmaceutical effects. Their biosynthesis is modulated by various abiotic factors including ultraviolet B radiation which induced ATP production and led to accumulation of indole alkaloids. To investigate the regulatory mechanism of secondary metabolism in the leaf mitochondria of C. roseus under ultraviolet B radiation, combinatory study of proteomic and metabolomic analyses of C. roseus was performed. ATP export in the leaves of C. roseus increased under UVB radiation, which required mitochondrial ATP synthase. Proteins related to mitochondrial complexes II/IV and their gene expression levels increased, and those related to mitochondrial complex I decreased. Proteins related to the methylerythritol phosphate pathway, especially geranylgeranyl pyrophosphate synthase, increased under ultraviolet B radiation. Metabolites whose levels changed were mainly alkaloids, organic acids, carbohydrates, phenylpropanoids, and fatty acids, while eight indole alkaloids increased. Integrative analysis of omics data indicated that the metabolism of glutamate and tyrosine was downregulated. These results suggest that ultraviolet B radiation induces dynamic changes in mitochondria in C. roseus , which guarantees ATP production, regulates the flux of the methylerythritol phosphate pathway to the biosynthesis of monoterpene moieties, and leads to accumulation of various indole alkaloids.
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Environmental Progress & Sustainable Energy
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2021
·Vol. 41
·期 1
·e13714
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IF 2.431
Xiaowei Wang,Junkai Zhang,Fengmin Wu,Junqing Cai,Jie Luo,Erpeng Zhou,Yongping Niu
Graphitic carbon nitride (g-C 3 N 4 ) is a fascinating nonmetallic photocatalyst for the removal of environmental pollutants. The fumed silica/g-C 3 N 4 (gCN-FS) composite photocatalysts were successfully fabricated by a combination of solvent volatilization and post-annealing methods. The introduction of SiO 2 not only widens the absorption range of visible light, but also enhances the specific surface area of g-C 3 N 4 . The gCN-FS-3 composite has a BET surface area of 129.89 m 2 /g, which is ~3.3 times as much as that of g-C 3 N 4 (39.54 m 2 /g). The gCN-FS composites have markedly improved rhodamine B (RhB) photodegradation activity in comparison to pure g-C 3 N 4 , bulk g-C 3 N 4 and P25 under 557 nm yellow-green light emitting diode light irradiation. The gCN-FS-3 has the highest RhB photodegradation rate, which is ~9.67-, 11.81-folds as compared to bare g-C 3 N 4 and bulk g-C 3 N 4 , respectively. The coupling effect between the increase in specific surface areas and the inhibition effect of SiO 2 on photogenerated electron/hole pairs recombination is responsible for the enhanced visible light photocatalytic activity of gCN-FS composite. Superoxide and holes are responsible for the RhB photocatalytic degradation. Furthermore, no apparent loss of photocatalytic activity over five cycles is observed, which indicates that the gCN-FS composites have considerable stability and reusability in the photodegradation process. The gCN-FS composites show great promise in visible light driven photocatalysis for environmental applications.
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Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Peng Liu,Dengjie Zhong,Yunlan Xu,Nianbing Zhong,Guangjun He
Co/Fe co-doped porous graphite carbon (Co/Fe-PGC) nanocomposites were successfully prepared by one-step pyrolysis with CoFe-MOF, in which the Co/Fe nanoparticles were uniformly coated on porous graphite carbon derived from MOF. It was used to microelectrolysis-Fenton degrade rhodamine B through the main active substance ∙OH. The color and TOC removal rate of 100 mg/L rhodamine B reached 99.41% and 64.6%, respectively, for 30 min. Rhodamine B was degraded into small molecular organic acids, alcohols and lipids by N-demethylation and chromophore cleavage, until it was finally degraded into CO 2 and H 2 O, and no new colored organics were produced in the degradation process. The degradation process follows the first-order reaction kinetics, and its rate constant is much higher than that of the previous similar studies. The excellent catalytic performance of Co/Fe-PGC catalyst is attributed to the coupling effect of micro-electrolysis and Fenton reaction, and the acceleration of cobalt on electron transport and Fe 2+ reduction. Co 0 /Fe 0 undergoes galvanic corrosion to generate Co 2+ /Fe 2+ and H 2 O 2 , and then these products undergo Fenton reaction to generate Co 3+ /Fe 3+ and ∙OH, thus forming a circulating system of Co 3+ /Fe 3+ and Co 2+ /Fe 2+ , enhancing the activation of H 2 O 2 and ensuring the efficient degradation of RhB.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Lu Luo,Lingcong Luo,Jianping Deng,Tingting Chen,Guanben Du,Mizi Fan,Weigang Zhao
The N and B co-doped hierarchical porous carbon with excellent textured properties by using two-step of activation and hydrothermal post-treatment process using ammonium pentaborate tetrahydrate (NH 4 B 5 O 8 ·4H 2 O) as both nitrogen and boron source are developed. The results showed that BNAC-3 has the maximum surface area (2471 m 2 /g) caused by the highest degree of micro/mesopores (0.82 and 0.35 cm 3 /g) and the linked 3D network are advantageous for the circulation of electrolytes and electrostatic adsorption. The contribution of Faradaic pseudocapacitance may be caused by high B (3.12 wt percent) and N (2.02 wt percent) contents of BNAC-3. Additionally, BNAC-3 exhibits excellent electrochemical efficiency with an ultra-high specific ability of 369 F/g at 1 A/g current density (CD) and maintains 240 F/g at 20 A/g in three-electrode systems. Notably, in a two-electrode device, maximum energy density can be almost 12.0 W h/kg at a power density (PD) of 375 W/kg.
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Frontiers in Cell and Developmental Biology
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2021
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IF 6.684
Zang Jiankun,Wu Yousheng,Su Xuanlin,Zhang Tianyuan,Tang Xionglin,Ma Dan,Li Yufeng,Liu Yanfang,Weng Ze’an,Liu Xuanzhuo,Tsang Chi Kwan,Xu Anding,Lu Dan
Exosomes contribute to cell–cell communications. Emerging evidence has shown that microglial exosomes may play crucial role in regulation of neuronal functions under ischemic conditions. However, the underlying mechanisms of microglia-derived exosome biosynthesis are largely unknown. Herein, we reported that the microglial PDE1-B expression was progressively elevated in the peri-infarct region after focal middle cerebral artery occlusion. By an oxygen-glucose-deprivation (OGD) ischemic model in cells, we found that inhibition of PDE1-B by vinpocetine in the microglial cells promoted M2 and inhibited M1 phenotype. In addition, knockdown or inhibition of PDE1-B significantly enhanced the autophagic flux in BV2 cells, and vinpocetine-mediated suppression of M1 phenotype was dependent on autophagy in ischemic conditions. Co-culture of BV2 cells and neurons revealed that vinpocetine-treated BV2 cells alleviated OGD-induced neuronal damage, and treatment of BV2 cells with 3-MA abolished the observed effects of vinpocetine. We further demonstrated that ischemia and vinpocetine treatment significantly altered microglial exosome biogenesis and release, which could be taken up by recipient neurons and regulated neuronal damage. Finally, we showed that the isolated exosome per se from conditioned BV2 cells is sufficient to regulate cortical neuronal survival in vivo. Taken together, these results revealed a novel microglia-neuron interaction mediated by microglia-derived exosomes under ischemic conditions. Our findings further suggest that PDE1-B regulates autophagic flux and exosome biogenesis in microglia which plays a crucial role in neuronal survival under cerebral ischemic conditions.
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PubMed
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Inorganic Chemistry Frontiers
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2020
·Vol. 7
·期 19
·3636-3645
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IF 5.958
Yifei Ye,Dazhi Li,Ping Xu,Jianmin Sun
Until recently, many metal-based catalysts have been developed for the cycloaddition reaction of CO2 with epoxides. However, the leaching of the active metal component would lead to various environmental problems. A novel nonmetal B-doped Lewis acid–base catalyst with hydrogen bond donor (HBD) groups (B-SBA-15-NH2) was prepared successfully through the hydrothermal process and post-modification. B-SBA-15-NH2 exhibited good catalytic performance for the CO2 cycloaddition reaction, and 95% yield of propylene carbonate and satisfied selectivity (98%) were achieved in the presence of the KI cocatalyst. The efficient catalytic activity of B-SBA-15-NH2 resulted from the synergistic effects of B and HBD groups, together with the functionalized –NH2 groups. B-SBA-15-NH2 also exhibited good generality with acceptable yields for the corresponding cyclic carbonates in the CO2 cycloaddition with various epoxides. Furthermore, the developed B-SBA-15-NH2 catalyst could be easily separated by centrifugation and reused for five runs without an obvious loss in activity. The good activity and stable reusability of the metal-free B-SBA-15-NH2 catalyst demonstrate that it is a promising green candidate catalyst in the field of CO2 conversion.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Shuman Li,Ming Han,Hong-Guo Liu
Amphiphilic block copolymers can self-assemble into various aggregates in which functional inorganic nanoparticles and organic chromophores can be incorporated. A variety of fabrication methods have been developed. In this work, the liquid/liquid interface mass transfer-assisted self-assembly method was extended to fabricate composite organized structure of polystyrene-b-polyacrylic acid (PS-b-PAA) with small organic molecules, such as diamines, dopamine and dyes. It was found that long uniform nanowires , hollow spheres and foams were generated when using these organic molecules under different conditions, which correspond to worm-like micelles , vesicles and aggregates of microcapsules, respectively. The length of the nanowires reaches to several tens of micrometers. The influence of the molecular structure of the organic molecules, especially the diamines was investigated and discussed, and the formation mechanism of these aggregates was analyzed. This method may be developed to a facile and useful approach to fabricate functional composite structure of block copolymers and small molecules.
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DYES AND PIGMENTS
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2020
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IF 4.613
Chunping Ma,Gaoyi Xie,Yangchun Tao,Hongni Zhu,Yi Zhang,Zhenguo Chi,Siwei Liu,Jiarui Xu
Three diblock copolymers ( PTPEE-PNns ) with controllable polymer structures were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization, combining 1-ethenyl-4-(1,2,2-triphenylethenyl)-benzene (TPEE) and N-isopropylacrylamide (NIPAM). All PTPEE-PNns copolymers showed remarkable aggregation-induced emission (AIE) characteristic. Due to the amphiphilic structure of the copolymers, PTPEE-PNn micelles (mainly hollow) were prepared with either “precipitation” or “dialysis” method, respectively. Scanning electron microscopy, transmission electron microscopy , dynamic light scattering and fluorescence methodology were performed to investigate the morphology, size distribution and stability of the micelles, revealing the effects of molecular weight and micelle preparation method on the nanostructure of the micelles. The PTPEE-PN2 hollow micelles prepared by the “dialysis” method had the advantages of small particle size, extremely narrow particle size distribution , remarkable thermal sensitivity, excellent particle stability, and showed good biocompatibility and fluorescence emission capability in cell imaging . This work would inspire more approaches to prepare novel AIE-active, thermoresponsive and biocompatible polymers for biomedical application .
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ADVANCED POWDER TECHNOLOGY
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2022
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IF 4.969
Zihan Zhou,Xingwen Wang,Rui Yu,Rongli Jiang,Yu Gao,Xueshuai Chen,Huilin Hou
In this paper, b-axis oriented ZSM-5 zeolite was synthesized by solvent-free method with ammonia as growth regulator. Zeolites were characterized by modern detection techniques such as XRD, SEM, BET and NH 3 -TPD. The results showed that ammonia could not only promote the crystallization of ZSM-5 zeolite, but also direct the synthesis of ZSM-5 zeolite with b-axis oriented morphology, which was beneficial to enhance the selectivity of light olefins. B-axis oriented ZSM-5 zeolite did not need to be mixed and aged in aqueous solution, which could reduce the discharge of sewage, and avoided the generation of autogenic pressure in the crystallization process. Furthermore, it is consistent with the concept of environmental friendliness, which could guide the green preparation of industrial ZSM-5 zeolites.
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