Environmental Science-Water Research & Technology
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2022
·Vol. 8
·期 11
·2567-2579
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IF 5.819
Fang Cheng,Jun Hou,Jun Wu,Yi Xu,Lingzhan Miao,Jun Xia,Zongli Huo
pentachlorophenol (PCP) is a kind of chlorinated aromatic contaminant that brings challenges from an environmental perspective. However, the performance of sulfidated nanoscale zero-valent iron (S-nZVI) in PCP removal remains unknown. In this study, S-nZVI was applied in the treatment of PCP-polluted water under different water chemistry conditions. The results showed that PCP was removed under the combined action of adsorption, dechlorination, and ˙OH-mediated oxidation, among which dechlorination played a leading role while oxidation lagged behind. The amount of adsorbed PCP correlated well with the PCP dechlorination rate constant (kred), except for S/Fe 0 and 0.1 and acidic initial pH (pHinitial) conditions. At neutral and alkaline pHinitial, kred increased with an increase in pHinitial due to the formation of a hydroxide layer that facilitates adsorption. At acidic pHinitial, kred increased with a decrease in pHinitial because hydrogen ions diffusing in the solution participated in the reaction. The effects of solution chemistry, such as anions, organic matter, and oxygen conditions, on PCP adsorption and transformation were also studied. Eight degradation byproducts were observed; the dechlorination products suggested that PCP dechlorination by S-nZVI occurred via a sequential pathway. PCP and its dechlorination products would then undergo ˙OH-mediated oxidation, resulting in products that are beneficial for microbes. Changes to S-nZVI after reacting and the role of sulfur were also discussed. This study confirmed that S-nZVI can be effective in the remediation of PCP-polluted groundwater. Further research is needed to optimize this remediation via coupling microbial technology and controlling the oxygen conditions.
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REACTIVE & FUNCTIONAL POLYMERS
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2022
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IF 4.966
Guoqiang Wang,Yakun Dong,Xingyu Hao,Li Zhang,Xiang Chi
Currently, a growing focus is devoted to the creation and utilization of renewable resources for bio-based polyesters due to the shortage of oil resources. Since 2,5-furandicarboxylic acid (FDCA) has been described as one of the most promising platform compounds, FDCA-based polyesters have been rapidly developed. Poly(decylene terephthalate- co -decylene furandicarboxylate) (PDTFs) in this study were prepared from dimethyl terephthalate (DMT), 1,10-decanediol (DDO) and dimethyl 2,5-furandicarboxylate (DMFD). By using 1 H NMR and 13 C NMR, the polyesters' chemical structure was verified. The thermal properties and the thermal stability of the polyesters were analyzed by Differential Scanning Calorimetry (DSC) and Thermogravimetric analysis (TGA). All polyesters underwent mechanical testing to ascertain their Young's modulus , tensile strength , and elongation at break. All polymers are semi-crystalline materials. The crystal texture of PDTF24 is equivalent to that of poly(decylene terephthalate) (PDT). However, the crystal structures of PDTF48 and PDTF76 are similar to that of poly(decylene furandicarboxylate) (PDF). All polymers exhibit high thermal stability. PDF has the highest tensile strength, probably because the oxygen atom on the furan ring results in stronger intermolecular interactions . When the content of the decylene furandicarboxylate unit reaches 48%, Young's modulus reaches its lowest value (96.6 MPa), but its elongation at break reaches its highest value (1098%) due to the lowest crystallinity .
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Sustainable Energy & Fuels
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2022
·Vol. 6
·期 22
·5121-5133
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IF 6.813
Guoqiang Zhang,Zhongqiu Liu,Yinuo Li,Yuanyuan Yu,Yujing Liu,Anguo Ying
Solid strong bases have attracted great research interest because of their excellent catalytic performance in the valorization of lignin into monocyclic aromatic compounds (MCACs). However, the high catalytic efficiency of solid strong bases for obtaining lignin-based MCACs is weakened due to the leaching and deactivation of basic sites caused by H2O formed in the reaction. More importantly, the precise fabrication of solid strong bases with ordered porous and unique hydrophobicity remains a grand challenge for the development of heterogeneous catalysts. Herein, novel multifunctional poly(ionic liquid)s (MFPILs) with Brønsted–Lewis dibasic sites, well-defined mesoporous channels, and hydrophobicity were successfully fabricated by a regulation-induced copolymerization. In addition, MFPILs show better catalytic performance with 21.99 wt% yield of lignin-based MCACs. The efficient catalytic properties of MFPILs for the directional valorization of lignin into MCACs are attributed to the synergistic catalysis, i.e., the mesoporous confinement, the sequence effect of Brønsted–Lewis dibasic sites on the transfer of active hydrogen, and hydrophobicity. This work not only has a certain guiding significance for the development of novel solid bases, but also provides an efficient catalytic strategy for producing lignin-based MCACs by co-catalysis.
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JOURNAL OF MOLECULAR STRUCTURE
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2022
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IF 3.841
Guangjian Xing,Lei Zhang,Yan Zhao,Sai Li,Tian Li,Tiantian Lv,Chunna Yu,Chang Zhao
The visible-light-responsive photocatalysts with high efficiency have been attracting tremendous focus in environmental remediation. Herein, three-dimensional (3D) Sb 2 X 3 ( X = S , Se) nanowires/graphene aerogel (Sb 2 X 3 /GA) monoliths were prepared by a facile hydrothermal route. The as-prepared Sb 2 X 3 /GA monoliths show the shape of a cylinder with a hierarchical porous structure. FESEM and porosimetry analyses revealed that the monoliths have high porosity, large total pore area as well as large pore volume . Sb 2 X 3 /GA demonstrated excellent photodegradation performance for the representative anionic/cationic dyes (methyl orange, rhodamine B , and crystal violet) and antibiotic drug (tetracycline hydrochloride) under 120 min of visible light irradiation. The degradation efficiencies of Sb 2 X 3 /GA were found to be 92.6–99.8% for the above-mentioned dye/drug, which were much larger than that of the pristine Sb 2 X 3 nanowires . The enhanced photodegradation activity could be ascribed to the synergistic effect between the Sb 2 X 3 nanowires and graphene aerogel, which was confirmed by the results of the photoluminescence and electrochemical impedance spectra. These findings provide an innovative strategy for designing 3D visible-light-responsive photocatalysts for water purification .
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Nanomaterials
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2022
·Vol. 12
·期 17
·2942
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IF 5.719
Fancong Zeng,Yingrui Sui,Meiling Ma,Na Zhao,Tianyue Wang,Zhanwu Wang,Lili Yang,Fengyou Wang,Huanan Li,Bin Yao
Cu2Ni0·05Zn0·95Sn(S,Se)4(CNZTSSe) films were synthesized on Mo-coated glass substrates by the simple sol–gel means combined with the selenization process, and CNZTSSe-based solar cells were successfully prepared. The effects of selenization temperature on the performance and the photoelectric conversion efficiency (PCE) of the solar cells were systematically studied. The results show that the crystallinity of films increases as the selenization temperature raises based on nickel (Ni) doping. When the selenization temperature reached 540 °C, CNZTSSe films with a large grain size and a smooth surface can be obtained. The Se doping level gradually increased, and Se occupied the S position in the lattice as the selenization temperature was increased so that the optical band gap (Eg) of the CNZTSSe film could be adjusted in the range of 1.14 to 1.06 eV. In addition, the Ni doping can inhibit the deep level defect of SnZnand the defect cluster [2CuZn+ SnZn]. It reduces the carrier recombination path. Finally, at the optimal selenization temperature of 540 °C, the open circuit voltage (Voc) of the prepared device reached 344 mV and the PCE reached 5.16%.Keywords:solar cell;selenidation temperature;CNZTSSe;sol gel
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Bowen Jiang,Jia Liu,Guoqiang Yang,Zhibing Zhang
A novel series of halogen free, hydroxyl group containing poly(ionic liquid)s (PILs) was first synthesized from glycerol dimethyl acrylate (GDA) and 1-vinyl imidazole (1-VIM) through free radical polymerization , follow by an alkylation step and an ion-exchange procedure to form the final imidazolium hydrogen carbonate heterogenous catalyst poly(HCO 3 -OH- n ). The chemical and physical properties were investigated by varying the monomer ratio between GDA and 1-VIM. Among them, poly (HCO 3 -OH-2) exhibited the highest catalytic activity for CO 2 cycloaddition, with the yield of chloropropene carbonate 90% under mild conditions (80 °C, 0.1 MPa, 12 h, 0.15 g catalyst for 32 mmol epichlorohydrin) in the absence of any cocatalyst, metal or solvent. A range of substrates with good to excellent yields under atmosphere was obtained. The poly(HCO 3 -OH- n ) catalyst is collectable and still remains acceptable catalytic activity after six runs. Finally, a preliminary kinetic is calculated on the basis of poly(HCO 3 -OH-2) with the activation energy value of 79.5 kJ·mol −1 . This study highlights that the poly(HCO 3 -OH- n ) enable to reach efficient CO 2 conversion under mild conditions.
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POSTHARVEST BIOLOGY AND TECHNOLOGY
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2022
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IF 6.751
Yanyan Feng,Dailiang Zhang,Yan Sun,Zan Meng,Aman Ullah Malik,Song Zhang,Hui Yan,Qingguo Wang
This research aimed to screen out safe and effective inhibitors of enzymatic browning from food-derived sulfur-containing compounds. Among eighteen candidate compounds, three were found to reduce the browning of fresh potato mashes. One of these compounds, S-furfuryl thioacetate (S-Ft) at only 0.04 and 0.07 mM inhibited the browning of fresh potato sticks, for over 10 d at 4 °C with an efficacy close to sodium bisulfite at 2.40 mM. S-Ft also reduced the browning of eggplant and asparagus lettuce slices. S-Ft retarded the browning occurrence of potato mashes and tyrosine solutions, but it did not cause the brown pigments colorless. Both the decrease in tyrosine contents and the increase in quinone contents were slowed by S-Ft in potato mashes. Compared with control, S-Ft at 0.04 and 0.07 mM reduced polyphenol oxidase (PPO) activity by 91.22 % and 91.77 %, and addition of copper acetate recovered the PPO activities to 55.62 % and 59.45 % of control, respectively. Kinetics results showed S-Ft inhibited PPO activity in a reversible mixed-type manner. The data of circular dichroism analysis and fluorescence emission spectra indicated S-Ft treatment caused the decrease in α-helix content, the increase in β-sheet content and the change in secondary structure of PPO. Molecular docking results illustrated S-Ft could act with Cu 2+ and amino acid residues of PPO. By comparison with other anti-browning inhibitors, S-Ft has the characteristics of low dosage and long shelf-life extension. These results demonstrated that S-Ft could be a novel and promising enzymatic browning inhibitor by chelating Cu 2+ and changing the conformation of enzyme to reduce PPO activity.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Bing Wang,Zhuo Li,HaiXia Ma,JianBo Zhang,LinYu Jiao,Hong Hao,EnZhou Liu,Long Xu,Chen Wang,Bo Zhou,XiaoXun Ma
Achieving efficient photocatalytic oxidation of antibiotics represents a key challenge, which can be overcome by developing dynamic attachment strategies between supramolecular and semiconducting catalysts. Herein, we utilize hydrogen bonding and van der Waals forces to dynamically connect self-assembled SubPc-1 dimers and Ag 3 PO 4 semiconductor catalysts for photocatalytic oxidation of antibiotics, which is systematically demonstrated by spectroscopic measurements and theoretical calculations. The degradation efficiency of SubPc-1/Ag 3 PO 4 supramolecular nanoarrays for tetracycline and oxytetracycline is 93.54% and 94.9% under 30 min visible light irradiation, respectively. The superior activity and excellent stability of supramolecular arrays are demonstrated to be more attributed to the dynamic hydrogen bonding and van der Waals connection between SubPc-1 and Ag 3 PO 4 . This work reveals a potential for preparing specific S -scheme heterojunction photocatalysts based on dynamic attachment supramolecular and semiconductor catalysts.
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APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Jianhui Zhu,Linchao Zeng,Xiaoya Li,Ning Zhao,Yanyi Wang,Zhilan Lin,Tingshu He,Libo Deng,Peixin Zhang
The inexpensive room-temperature sodium-sulfur (RT Na-S) battery has attracted extensive attention due to its various potential application but is still suffering from the low utilization of sulfur, the shuttle effect and the sluggish reaction activity of sodium polysulfides (SPSs). In this work, a TiO 2 /sulfur/atomic-iron loaded carbon nanosheet cathode is designed for high performance RT Na-S battery. When the atomic iron exists, a much higher electrochemical activity of sulfur was obtained, indicating the atomic iron can accelerate the conversion of SPSs. Furthermore, the TiO 2 layer can inhibit the shuttle effect of SPSs and the side-reaction between the intermediates and carbonate electrolyte. As a result, the constructed sulfur cathode exhibits a high reversible capacity (569.9 mAh g −1 with an initial coulombic efficiency of 57.57%) at 0.1 A g −1 and outstanding cycling performance (507 mAh g −1 after 50 cycles). This work provides a new strategy for preparing high performance cathode materials for RT Na-S battery.
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PHYTOMEDICINE
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2022
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IF 6.656
Simeng Chu,Yujie Lu,Wenjuan Liu,Xiaoyao Ma,Jiamin Peng,Xiaoying Wang,Min Jiang,Gang Bai
Background Tetrandrine (TET), a bisbenzylisoquinoline alkaloid isolated from Stephania tetrandra S. Moore, is the only approved medicine in China for silicosis. However, TET-induced hepatotoxicity has raised safety concerns. The underlying toxic targets and mechanism induced by TET remain unclear; there are no targeted detoxification strategies developed for TET-induced hepatotoxicity. Ursolic acid (UA), a pentacyclic triterpene with liver protective effects, may have detoxification effects on TET-induced hepatotoxicity. Purpose This study aims to explore toxic targets and mechanism of TET and present UA as a potential targeted therapy for alleviating TET-induced hepatotoxicity. Methods A TET-induced liver-injury model was established to evaluate TET toxicity and the potential UA detoxification effect. Alkenyl-modified TET and UA probes were designed to identify potential liver targets. Pharmacological and molecular biology methods were used to explore the underlying toxicity/detoxification mechanism. Results TET induced liver injury by covalently binding to the substrate-binding pocket (H-site) of glutathione S-transferases (GSTs) and inhibiting GST activity. The covalent binding led to toxic metabolite accumulation and caused redox imbalance and liver injury. UA protected the liver from TET-induced damage by competitively binding to the GST H-site. Conclusion The mechanism of TET-induced hepatotoxicity is related to irreversible binding with the GST H-site and GST-activity inhibition. UA, a natural antidote, competed with TET on H-site binding and reversed the redox imbalance. This study revealed the hepatotoxic mechanism of TET and provided a targeted detoxifying agent, UA, to alleviate hepatotoxicity caused by GST inhibition.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Qiqi Lu,Xiu-Zhi Wei,Jianguo Liu,Longlong Ma
Zeolite-tailored encapsulation of metal nanoparticles exhibits prominent catalytic performance in many fields especially for selective hydrogenation reaction due to the modulation effect of the zeolite microenvironment. Here, Pd nanoparticles encapsulated in MFI zeolite by an in-situ encapsulation method were first used in the selective hydrogenation of nitrile into a primary amine. After introducing KOH for mediating the acid-base property of zeolite microenvironment, the as-synthesized [email protected] manifested an improved selectivity in the synthesis of primary amine from nitrile, while outperformed both commercial catalysts and conventional Pd supported on zeolite catalyst. The remarkable performance of [email protected] could be attributed to both the basic property of the S-1-K zeolite for inhibiting the side reactions and the highly dispersed and ultrasmall Pd clusters for superior catalytic activity. Besides, the best yield of 81% was achieved at 80 °C, 5 bar H 2 , 2 h in ammonia solution via optimization experiments, and the moderate applicability of [email protected] catalyst was obtained by substrate scope test.
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CERAMICS INTERNATIONAL
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2022
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IF 5.532
Zhongli Liu,Haizeng Wang,Jizhou Duan,Baorong Hou
Bi 2 WO 6 /AgIO 3 (BWO/AIO) nanosheet composites were constructed by a two-step hydrothermal method . The structure, morphology and photoelectrochemical properties of the composites were characterized by X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (UV-DRS), transmission electron microscopy (TEM), impedance, X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The constructed photocatalyst composites exhibited the best photocatalytic performance at a molar ratio of BWO/AIO-0.8. In addition, there was complete degradation of RhB by the BWO/AIO-0.8 in 180 min under illumination, and the bactericidal rates were 99.10%, 97.32% and 96.3% for P. aeruginosa , S. aureus and E. coli, respectively, in 60 min. Based on the energy band structure of the semiconductor and radical trapping experiments, the S-scheme heterojunction was associated with the enhanced photocatalytic properties.
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