ENVIRONMENTAL POLLUTION
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2022
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IF 9.988
Zongrui Li,Shengsheng Li,Liangzhong Li,Lin Tao,Xiaohui Zhu,Ruixue Ma,Bingbing Sun,Yanhong Zhang,Yunjiang Yu
The presence of microplastics (MPs) and the associated organic pollutants in the aquatic environment has attracted growing concern in recent years. MPs could compete with chemicals for adsorption sites on the surface of sediment, affecting the sorption processes of pollutants on sediment. However, few studies focused on the binary system of microplastics-sediment (MPs-S), which appear much common in aquatic environment. Herein, we investigated the interactions between a continuously used flame retardant tetrabromobisphenol A (TBBPA) and four MPs-S complexes (PVC–S, PE-S, PP-S and PS-S). The equilibrium adsorption capacities were 17.1, 15.6, 15.4, and 14.0 mg/kg for PVC-S, PS-S, PE-S, and PP-S, respectively. Kinetics suggest that adsorption behavior of TBBPA was fitted by pseudo-second-order model. Co-adsorption of TBBPA in binary systems were much lower than the sum of each simple system, which may be due to the mutually occupied adsorption sites. Higher ionic strength and lower dissolved organic matter strengthened the sorption of TBBPA onto MPs-S complexes. The enhanced sorption capacities for TBBPA were observed with elevated proportion and small particle size of MPs in the MPs-S complexes. This study contributes to the knowledge on the impact of MPs in partitioning of organic pollutants in-between solid and aqueous phases in the aquatic environment.
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高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 9
·e202200301
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IF 4.782
Shuang Xia,Wen Huang,Wenqi Yan,Xinhai Yuan,Xi Chen,Lili Liu,Lijun Fu,Yusong Zhu,Qinhong Huang,Yuping Wu,Teunis van Ree,Rudolf Holze
Graphical Separators for advanced Li−S batteries were prepared using spherical rutile TiO 2 with oxygen vacancies and three-dimensional interconnected graphene-like carbon. As an advanced energy-storage system, Li−S batteries have attracted much attention, but there is still a series of problems hindering their commercialization, such as the ‘shuttle effect’ and corrosion of lithium anodes. To alleviate these two important problems simultaneously, we modified the separators with spherical rutile TiO 2 with oxygen vacancies (abbreviated OT) and three-dimensional interconnected graphene-like carbon (abbreviated GC) for advanced Li−S batteries to improve the electrochemical performance. The modified separators (abbreviation OTCD) have low charge transfer impedance, a catalytic effect on polysulfides, and a barrier effect on polysulfides, which can suppress the ‘shuttle effect’ and prevents the corrosion of lithium anodes in Li−S batteries. The as-prepared Li−S batteries show good cycling stability for 250 cycles with 0.048 % capacity decay per cycle at 1 C. Moreover, the SEM images of lithium anodes after 50 cycles showed that the lithium anodes were uncorroded. This work provides a practical and effective reference for the advanced Li−S batteries.
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CHEMOSPHERE
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2022
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IF 8.943
Di Liu,Yunning Chen,Renquan Guan,Jie Zhao,Huimin Jin,Siyi Zhang,Qingkun Shang
In this paper, a type of heterojunction photocatalyst S-Tyr-NDI-Tyr/TiO 2 was prepared by self-assembly of tyrosine-substituted naphthamide (NDA) and bonding with titanium dioxide. The self-assembly process and driving force of monomer M-Tyr-NDI-Tyr were simulated by theoretical calculation. Taking atenolol as the target pollutant, the photocatalytic performance of the heterojunction photocatalyst under visible light was studied, and the degradation products were analyzed by mass spectrometry. The environmental toxicity of photocatalytic process was evaluated by luminescent bacteria. The principle of high photocatalytic activity of S-Tyr-NDI-Tyr/TiO 2 heterojunction photocatalyst was proposed by analyzing the fluorescence spectrum, photocurrent density and resistance, electron paramagnetic resonance spectrum, free radical capture experiment and energy band position of S-Tyr-NDI-Tyr/TiO 2 heterojunction photocatalyst. In addition, the photocatalytic degradation of different pollutants by S-Tyr-NDI-Tyr/TiO 2 heterojunction photocatalyst was also studied. This work will provide a useful example for the further development of new and efficient organic supramolecular/inorganic semiconductor composite photocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yanrui Hao,Hao Guo,Fan Yang,Junye Zhang,Ning Wu,Mingyue Wang,Cuiliu Li,Wu Yang
Multi-walled carbon nanotube (MWCNT)/Ni-Mn-S composites are derived from MWCNT/Ni/Mn bimetallic metal-organic framework (MOF) for supercapacitor electrodes. Electroconductive MWCNT is introduced into Ni-Mn-S to form a three-dimensional interconnected structure due to the covalent interaction between Ni atoms and C atoms. During energy storage, MWCNT serves as miniature current collector to shorten pathway of electron collection and transmission. In addition, S 2- etching agent with Kirkendall effect makes edges and surfaces of the resulted sulfide structures rougher provide more active sites and improves electrochemical performance compared with precursors. By finely adjusting Ni/Mn molar ratio, the prepared MWCNT/Ni-Mn-S composite achieves excellent properties. As-prepared MWCNT/Ni-Mn-S(3:2) exhibits high specific capacitance of 1041 mAh g −1 at 1 A g −1 and good cyclic stability. The capacitance retention reaches 83.3% after 10,000 cycles. The assembled MWCNT/Ni-Mn-S(3:2)//AC hybrid supercapacitor (HSC) also shows high energy density of 25.33 Wh Kg −1 at power density of 829 W Kg −1 and outstanding cycling stability (93.3% after 20,000 cycles), which illustrates MWCNT/Ni-Mn-S(3:2) has important potential in supercapacitor.
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JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 16
·7909-7922
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IF 4.682
Chai Chaofan,Yang Xuefang,Yang Xiaohua,Dong Chuan,Bian Wei,Choi Martin M. F.
Abstract The utilization of nanomaterial-based probes in detecting glutathione (GSH) and cell imaging has aroused extensive attention owing to the excellent properties of nanoprobes. Herein, we have synthesized manganese dioxide-S, O co-doped graphitic carbon nitride quantum dots (MnO 2 -S, O-CNQDs) nanocomposite by in situ synthesis of MnO 2 nanosheets in S,O-CNQDs dispersion solution. It was found that GSH could specifically bind to MnO 2 -S, O-CNQDs so that the fluorescence of S, O-CNQDs could be recovered. As such, a “turn-on” MnO 2 -S, O-CNQDs nanoprobe can be fabricated and applied to rapidly determine trace amounts of GSH. Under the optimal conditions, MnO 2 -S, O-CNQDs shows sensitive response to GSH in the range 10–270 μM with a detection limit of 0.307 μM ( S / N = 3). The developed MnO 2 -S, O-CNQDs probe has demonstrated great potential to detection of GSH in biological samples and glutathione injections. What is more, MTT assay indicates that MnO 2 -S, O-CNQDs has low biotoxicity. The non-fluorescence MnO 2 -S, O-CNQDs reacts with GSH to recover the fluorescence of S, O-CNQDs in HepG2 cells. Thus, the “turn-on” fluorescence change of MnO 2 -S, O-CNQDs offers a potentially useful tool to monitor GSH of cancer cells. Graphical Abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Xinxin Yuan,Jieyi Yang,Yiyang Yao,Hui Shen,Yue Meng,Bo Xie,Zheming Ni,Shengjie Xia
Single-phase photocatalysts exhibit low performance of photocatalytic degradation of pollutants, which is mainly due to the fact that most intrinsic photocatalysts can only produce one active species for degradation reactions. In order to solve this problem, the 0D/2D Cu 2 O/BiOCl S-scheme heterojunction was successfully constructed through a facile hydrothermal route. The obtained 0D/2D Cu 2 O/BiOCl displays high catalytic activity for tetracycline (TC) photodegradation, and 90.3% of TC was photodegraded within 80 min, which is much better than that by pure Cu 2 O and BiOCl. The excellent photocatalytic activity can be ascribed to the formation of S-scheme heterostructures, which enables the photocatalyst to generate superoxide radicals and hydroxyl radicals, and at the same time, makes the oxidation potential more positive and the reduction potential more negative. It is further proved by the results of experimental characterization and theoretical calculation show that the built-in electric field between Cu 2 O and BiOCl is a key factor in inducing the path of S-scheme electron transmission. In addition, the effects of various reaction conditions, including catalyst dosage, pH value and reaction temperature, on the photodegradation of tetracycline were discussed in detail. The intermediates and degradation path were also discussed in detail by liquid chromatography-mass spectrometry.
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Mengke Li,Gaojie Yan,Peng Zou,Haifeng Ji,Han Wang,Zongjie Hu,Zhipeng Yang,Yi Feng,Haijie Ben,Xiaojie Zhang
First, a new covalent organic framework (HUT9) with disulfide bonds have been synthesized, which can be grown in situ on carbon nanotubes (CNT) as separator modification material for Li–S batteries. Experiments and DFT showed that disulfide bond could effectively capture soluble polysulfides (LiPSs) during discharge process, while promoting the conversion of LiPSs to Li2S/Li2S2 and improve the utilization rate of sulfur. The polar groups of the covalent organic framework provide chemisorption, and an interwoven network of HUT9@CNT (physical constraints) cooperates to inhibit the transport of LiPSs. The modified battery has a capacity retention rate of 83% (decay rate of 0.032% per cycle) after 500 cycles at 1 C. Specifically, the battery with 2-HUT9@CNT modified separators (sulfur loading: 4 mg cm–2, sulfur content: 80%, electrolyte/sulfur ratio: 10 mL g–1) can reach 3.4 mAh cm–2 area capacity after 50 cycles. This work enriched the COF material system and provided guidance for the application of organic materials in an energy storage system.
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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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高影响因子
PHYTOMEDICINE
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2022
·
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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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 8
·4115-4124
·
IF 2.047
Li Jiaojiao,Xiao Zhen,Zhou Xiaozheng,Zhang Wenkui,Zhang Jun,Gan Yongping,Huang Hui,He Xinping,Wang Guoguang,Xia Yang
Lithium-sulfur (Li-S) batteries are a promising electrochemical energy storage device due to their low cost, high energy density, and excellent sustainability, making them superior to many commercial lithium-ion batteries. Despite the great road to market, Li-S batteries still suffer from low practical energy density, which is intimately related to fundamental scientific and technological issues of sulfur cathodes. As a non-negligible parameter in sulfur cathodes, the compaction density plays a crucial role in the energy density of Li-S batteries. Herein, the effect of compaction density of sulfur/carbon cathodes on the electrochemical performance of Li-S batteries is investigated. It is demonstrated that sulfur/carbon cathodes with an optimized compaction density of 1.2 g cm −3 not only can guarantee the good contact of active materials, but can also ensure the rational dosage of electrolyte, thereby increasing the sulfur utilization as well as reducing the dissolution of polysulfide into the electrolyte. As a result, the pouch cells paired with the sulfur/carbon cathode and Li metal anode deliver superior specific capacity and remarkable cycling performance, which is attributable to the better contact between particles and the faster redox kinetics. This work reveals the contribution of the compaction density of the sulfur cathode to the electrochemical performance of the Li-S battery, providing an instructive paradigm for the rational design of an advanced sulfur cathode for large-scale commercialized Li-S pouch cells.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
·
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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MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
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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