IONICS
·
2025
·
IF 2.6
Han Jingjing,Ju Xiaocheng,Xiao Yi,Liang Xinyu,Zhang Guoli,Jia Xiaoxia,Yang Zhewei,Pan Yuede
Nickel disulfide (NiS 2 ) is a promising electrochemical storage material for varied charge carrier ions. However, previous preparation approaches for NiS 2 -based materials have been haunted by the low utilization efficiency of the sulfur atoms in the precursor and the detrimental byproduct of SO 2 . Inspired by the unique crystal structure of NiS 2 , composed of Ni 2+ cations and S 2 2− anions, herein, we develop an environmentally friendly synthesis method for crystalline NiS 2 with 100% utilization efficiency of precursor sulfur atoms through the precipitation reaction between Ni 2+ and S 2 2− , which can happen at varied temperatures and in different solvents. Furthermore, a NiS 2 /S composite is in situ formed by the co-precipitation reaction between Ni 2+ and S 8 2− , which can also occur at varied temperatures and in different solvents. As demonstration, both the NiS 2 and NiS 2 /S have been applied for the electrochemical storage of nonaqueous Na + ions and aqueous Cu 2+ ions. Owing to the in situ formed elemental sulfur with higher theoretical capacity and the considerable conductivity provided by the framework of NiS 2 in the NiS 2 /S composite, it exhibits superior electrochemical performance compared to NiS 2 in terms of capacity, rate, and cycling stability. The polysulfide anions produced in the process of nonaqueous sodium ion storage enhance the electrochemical kinetics, and the sulfur can be converted into Cu 2 S through the intermediate of CuS in the process of aqueous copper ion storage. The sodium ion storage capacity of NiS 2 /S is retained at 578.5 mAh g −1 after 375 cycles at 2.0 A g −1 , and its reversible copper ion storage can sustain a long life of 1500 cycles at 1.0 A g −1 . Our work paves the way towards liquid-state inorganic synthesis of metal sulfides composed of metal cations and disulfide anions.
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ORGANIC PROCESS RESEARCH & DEVELOPMENT
·
2020
·
IF 3.023
Zeyu Yang,Wenjie Ye,Youyu Xie,Qinghai Liu,Rong Chen,Hualei Wang,Dongzhi Wei
Bioreductions catalyzed by alcohol dehydrogenases (ADHs) play an important role in the synthesis of chiral alcohols. However, the synthesis of ethyl (S)-4-chloro-3-hydroxybutyrate [(S)-CHBE], an important drug intermediate, has significant challenges concerning high substrate or product inhibition toward ADHs, which complicates its production. Herein, we evaluated a novel ADH, SmADH31, obtained from the Stenotrophomonas maltophilia genome, which can tolerate extremely high concentrations (6 M) of both substrate and product. The coexpression of SmADH31 and glucose dehydrogenase from Bacillus subtilis in Escherichia coli meant that as much as 660 g L–1 (4.0 M) ethyl 4-chloroacetoacetate was completely converted into (S)-CHBE in a monophasic aqueous system with a >99.9% ee value and a high space-time yield (2664 g L–1 d–1). Molecular dynamics simulation shed light on the high activity and stereoselectivity of SmADH31. Moreover, five other optically pure chiral alcohols were synthesized at high concentrations (100–462 g L–1) as a result of the broad substrate spectrum of SmADH31. All these compounds act as important drug intermediates, demonstrating the industrial potential of SmADH31-mediated bioreductions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Hui Li,Ziqun Wang,Yunhui He,Sugang Meng,Yun Xu,Shifu Chen,Xianliang Fu
Rational synthesis of photocatalytic materials is an effective way to improve their performance. In this work, to optimize the S precursors, a series of Mn x Cd 1−x S (MCS) were first hydrothermally synthesized with the prevalent thiourea (TA), thioacetamide (TAA) and L-cysteine (L-Cys) as the S sources. The optimum feed ratio of Mn/Cd was then determined based on the optimized S precursor. The effects of S precursors and the feed ratio of Mn/Cd on the phase structure, absorption, morphology, band structure, and the photocatalytic hydrogen evolution reaction (HER) performance of MCS were investigated systematically. The hexagonal phase structures of MnS, CdS, and MCS are favored by TA and L-Cys as the S sources, while their cubic phases are benefited by TAA. TAA is the preferred S source for the preparation of highly active MCS and the solid solution is formed through the consolidation of cubic α-MnS into cubic CdS. The activity of MCS can be improved with the increase of Mn content from x = 0–0.6. The sample with x = 0.6 shows the highest HER activity (2253 μmol·h −1 ·g −1 ) and the performance is almost 6 times higher than CdS (416 μmol·h −1 ·g −1 ). The enhanced activity can be attributed to the improved separation efficiency of photo-induced charge carriers and the negative-shifts of E cb , which are induced by the introduction of Mn. A segregation of inert α−MnS from MCS is occurred when Mn content is >0.6, resulting in a decay of the HER activity. A change of the semiconductivity from n-type to bipolar type is occurred in MCS due to the uneven sulfidation of Mn in MCS.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 412
·期 23
·5843-5851
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IF 3.637
Chen Hongqi,Yang Xueping,Liu Yunchun,Wang Lun
Glutathione S-transferase (GST) is a detoxification enzyme of the liver and kidney. Based on the toxicological effect of GST, it is of great significance to develop a rapid and sensitive detection method for GST. In this work, a new luminescence resonance energy transfer (LRET) system has been designed to detect glutathione S-transferase in the near-infrared (NIR) region by utilizing NaGdF 4 :Yb 3+ ,Tm 3+ @NaYF 4 upconversion nanoparticles (UCNPs) as the donor and NIR dye-806@Glutathione (IR806@GSH) as the acceptor. NaGdF 4 :Yb 3+ ,Tm 3+ @NaYF 4 UCNPs were synthesized by a coprecipitation method and surface modification of NOBF 4 . The donor (positively charged) interacted with the acceptor (negatively charged) via electrostatic interactions to bring them into close proximity; then, LRET occurred and the luminescence was quenched. In the presence of GST, GST can specifically interact with the GSH of IR806@GSH molecule, making IR806@GSH far away from the donor surface, inhibiting the LRET, and restoring the luminescence of the UCNPs. There was a good linear relationship between the luminescence recovery intensity of UCNPs and GST concentration, ranging from 0.11 to 14.19 nM, and the detection of limit was 0.06 nM. The method has been used in the detection of GST in human serum samples and is expected to have potential applications in the biological field.
A luminescence resonance energy transfer system was developed for determination of glutathione S-transferase in the near-infrared region by utilizing NaGdF 4 :Yb 3+ ,Tm 3+ @NaYF 4 upconversion nanoparticles as the donor and NIR dye-806@Glutathione as the acceptor
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2018
·
IF 3.974
Ruilong Li,Huadong Tan,Linlin Zhang,Shaopeng Wang,Yinghui Wang,Kefu Yu
Microplastics sorption of persistent organic pollutants (POPs) was the core processes that cause negative effects to biota, and their influencing factors and related mechanisms are poorly understood. In this study, we explored the impacts of water extractable organic matter (WEOM), an important source of endogenous dissolved organic matter in mangrove sediment, on the sorption coefficients of typical parent, alkyl and N/O/S-containing polycyclic aromatic hydrocarbons (PAHs) by microplastics. The presence of L-WEOM (D) impeded the PAHs sorption as the coefficients ( K f ) decreased to 10.17 (μg/kg)/(μg/L) n and to 8.39 (μg/kg)/(μg/L) n for fluorene (Flu) and 1-methyl-fluorene (1-M-Flu), respectively. The K f exhibited good linear relationships with the aliphaticity of L-WEOM ( p < 0.05) rather than the aromatic carbon/alkyl carbon content ( p > 0.05). Under the presences of L-WEOM (D), (S) and (K), the lone pair electrons of N/O/S-containing PAHs was the dominant factor contributing to the obvious difference of the K f values from the other groups. Moreover, the largest impact of L-WEOM (D) on the Flu sorption was in the case of PVC microplastics, while almost no effect was in the case of PS microplastics. The findings of our work may be helpful in improving our understanding of the role of WEOM on the sorption of PAHs to microplastics in the field mangrove sediment.
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高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 47
·19062-19071
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IF 4.177
Guang-Ning Liu,Ke Li,Qing-Shun Fan,Hui Sun,Xin-Yu Li,Xiao-Nan Han,Yu Li,Zhen-Wei Zhang,Cuncheng Li
Solvothermal reactions of AgI with the vulcanization accelerator 2,2′-dibenzothiazolyl disulfide and hydroiodic acid in alcohols afford two hybrid iodoargentates with one-dimensional structures, namely (Et2mbt)[Ag2I3] (1, Hmbt = 2-mercaptobenzothiazole) and {(Hmbt)[AgI]}n (2). The syntheses of both 1 and 2 involve unprecedented multiple in situ reactions. Specifically, a simultaneous disulfide bond cleavage, N and S donor atoms bialkylation, and self-assembly reaction lead to 1 that contains a discrete N,S-biethylated cation (Et2mbt)+ and a rare inorganic (Ag2I3)− anionic chain, while a simultaneous disulfide bond cleavage, N-protonation and self-assembly reaction affords 2 which features zwitterionic Hmbt molecules coordinating with the opposite side Ag atoms of a neutral inorganic (AgI)n chain via forming Ag–S coordination bonds. The simultaneous alkylation on a thiazolyl-N donor and a thiol-S donor atom for a thiazolyl-based heterocycle using inexpensive alcohols and haloids under solvothermal conditions instead of traditional two-step organic synthesis was found for the first time. The two compounds have band gaps of 2.95 eV for 1, and 2.78 eV for 2 exhibiting an observed blue shift compared with bulk AgI. Also, 1 and 2 can be used as effective heterogeneous photocatalysts for methyl orange dye treatment under UV light irradiation.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 4
·545-554
·
IF 1.982
Yong Xu,Linshuang Li,Jianfei Che,Zhifeng Ye
A series of optically transparent and colorless semi-fluorinated poly(ether imide)s (PEIs) (III) were prepared from non-fluorinated 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (HQDPA) with various trifluoromethyl-substituted diamines. The III series showed more colorless and higher optical transparency with a cutoff absorption wavelength (λ0) below 370 nm than the IV series based on the corresponding non-fluorinated analogues and V series derived from CF3-free pyromellitic dianhydride (PMDA). Compared with the fluorinated VI series based on fluorinated 4,4′-hexafluoroisopropylidenediphthalic anhydride (6FDA), the semi-fluorinated III series not only exhibited much better optical transparency, but also had better mechanical and thermal properties. The III series had a tensile strength of 79.8–109.5 MPa, modulus of elasticity of 3.0–7.7 GPa and elongation at break of 14.2–26.7%, together with glass-transition temperatures (Tg) ranging from 214.3 to 265.1 °C and temperatures of 5% weight loss (T5%) beyond 530 °C. Meanwhile, the novel semi-fluorinated PEI IIIb was optically transparent and colorless with a λ0 of 367 nm coupled with dielectric constants below 3.2 and contact angles against water over 112°. In particular, the optically transparent IIIa exhibited the best tensile strength of 109.5 MPa when compared with already reported counterparts.
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COLLOID AND POLYMER SCIENCE
·
2009
·Vol. 287
·期 4
·495-500
·
IF 1.736
Wang Chen-Yi,Li Peng-Hui,Li Guang,Jiang Jian-Ming
A series of novel fluorinated poly(ether ketone amide)s (PEKAs) were prepared from an unsymmetrical aromatic diamine, (4′-(4″-amino-2″-trifluoromethylphenoxy)-3′,5′-dimethylphenyl)(4-aminophenyl)-methanone ( 1 ), with various aromatic dicarboxylic acids using the phosphorylation polycondensation technique. The PEKAs had inherent viscosities ranging from 0.43 to 0.65 dl/g. All the fluorinated PEKAs could be soluble in many polar organic solvents such as N -methyl-2-pyrrolidinone (NMP), N,N ′-dimethylacetamide (DMAc), N,N ′-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and tetrahydrofuran (THF). Flexible and tough polymer films could be prepared by casting from DMAc solvent. The PEKA films exhibited high optical transparency with a cutoff wavelength of 354–365 nm and good mechanical properties with tensile strengths of 78–98 MPa and elongations at break of 11.5–18.5%. They showed glass-transition temperatures in the range of 288−323 °C and the onset decomposition temperatures in the range of 450−461 °C in nitrogen atmosphere. Meanwhile, the PEKA films possessed low dielectric constants of 1.98–2.71 at 1 MHz and low moisture absorption (<2%). Due to their properties, the fluorinated PEKAs could be considered as photoelectric and microelectronic materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huihui Wang,Na Li,Zhen Meng,Jiangdu Huang,Dingrong Qiu,Kaijiong Guo,Li Jinxin,Dayong Fan,Vanchiappan Aravindan,Huidan Lu,Yongping Liu,Sundaram Chandrasekaran
Single-atom catalysts (SACs) are about to undergo the next paradigm shift, thanks to diatomic single atoms (DSACs), which provide excellent performance due to the synergistic effect of nearby bimetallic pairs. However, the synthesis of DSACs with precise bimetallic structures is currently limited, and it continues to be difficult to rationally design such catalysts and comprehend their structure-activity relationships. Herein, a facile practical pre-coordination approach followed by a carbonization process was used to rationally design DSACs of copper (Cu) and iron (Fe) coordinated with sulfur (S) and nitrogen (N) atoms in a rhombic dodecahedral carbon matrix (S CuFe−N C). Experimental and theoretical findings signify that the synergistic effect of Cu Fe DSACs may induce the electronic charge redistributions and thereby enhances the ability of oxygen intermediates adsorption/desorption kinetics of S CuFe−N C. In addition, the coordinated S and N-ligands may preserve the structural stability of S CuFe−N C. This can result in regulated electronic configurations, and it is especially beneficial for the enhancement of ORR because of the rapid release of electrons. Consequently, the S CuFe−N C exhibited an enhanced ORR performance than all other samples including Pt/C. Besides, the rechargeable ZAB based on the S CuFe−N C catalyst delivered a higher power density (∼162.01 mW cm −2 ) than the Pt/C-based ZAB (∼136.81 mW cm −2 ). Also, the S CuFe−N C-based ZAB possesses a higher specific capacity (∼809.43 mAh g −1 ) than that of Pt/C (∼787.33 mAh g −1 ). Our findings provide a new avenue for rationally designing and precisely tuning the atomically dispersed low-cost non-precious heteronuclear DSACs for electrocatalysis and beyond.
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POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2025
·
IF 6.8
Zhimin Wang,Mingming Huang,Mei Dai,Dandan Tian,Yingying Shi,Bin Wu,Zheng Zhang,Zunyang Song,Jingying Shi
Peach fruit is highly susceptible to decay caused by Botrytis cinerea . Volatile compounds have attracted considerable attention due to their safety and practical application advantages. S-methyl butanethioate, a volatile organic compound, is biosynthesized by microorganisms and plants. In this study, fumigation with synthetic s-methyl butanethioate at 50, 100, 200 and 300 μL/L effectively inhibited mycelial growth and conidial germination of B. cinerea and disease incidence of gray mold on peach fruit in a concentration-dependent manner. Furthermore, s-methyl butanethioate induced conidial apoptosis by causing the accumulation of reactive oxygen species (ROS) and exacerbating mitochondrial damage. To address the limitations in solubility, stability, and volatility of s-methyl butanethioate, a slow-release fresh-keeping card was prepared by embedding s-methyl butanethioate into β-cyclodextrin. Scanning electron microscopy (SEM) and Fourier transform-infrared spectroscopy (FT-IR) confirmed the successful embedding of s-methyl butanethioate into the cavity of β-cyclodextrin, forming the encapsulated structure of the inclusion complex. Notably, the release of s-methyl butanethioate from the fresh-keeping card was delayed for 15 d and the antifungal effect was stronger than direct fumigation with s-methyl butanethioate. Moreover, the fresh-keeping card application prevented surface damage to peach fruit caused by direct fumigation. Therefore, the fresh-keeping card loaded with encapsulated s-methyl butanethioate not only enhanced stability but also extended antifungal efficacy, outperforming the traditional un-encapsulated form. Therefore, this study demonstrates that fresh-keeping card loaded with natural components might serve as an alternative to synthetic chemical fungicides for controlling postharvest diseases of fruit and vegetables.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jiayi Meng,Yamei Huang,Yifan Liao,Quanmei Zhou,Yuchen Wei,Xinglin Wang,Linlin Gao,Wei-Lin Dai
Covalent organic frameworks (COFs), characterized by efficient light absorption and highly tunable electronic structures, exhibit substantial promise for photocatalytic hydrogen peroxide (H 2 O 2 ) production. To solve the problem of severe photogenerated carrier recombination, the researchers proposed to construct step-scheme (S-scheme) heterojunctions by combining COFs with metal sulfides (MS) to achieve effective separation and directional transfer of photogenerated electrons and holes. Herein, we deposited a bipyridine-linked COF (TpBpy) onto Ag-doped zinc indium sulfide (Ag-ZnIn 2 S 4 , denoted as Ag-ZIS) nanoflowers to construct an S-scheme heterojunction for photocatalytic H 2 O 2 production. Employing room-temperature cation exchange engineering, atomic-level modulation of the ZIS lattice is achieved under mild conditions, inducing tunable bandgap narrowing and a red-shifted visible light absorption edge. Ag doping promotes the formation of S-scheme heterojunction and further optimizes the built-in electric field. The construction of the S-scheme heterojunction, which involves strong electronic coupling at the contact interface between Ag-ZIS and TpBpy COF, significantly reduces the recombination rate of photogenerated carriers, enhances charge transfer efficiency, and forms an efficient electron transfer channel. The optimized photocatalyst, Ag-ZIS/TpBpy COF-2 (denoted as AZC-2) exhibited excellent photocatalytic activity from pure water, with H 2 O 2 yield reaching 4425 μmol·g −1 ·h −1 . This study highlights the great potential of ion doping strategies for advancing MS/COF-based S-scheme heterojunctions in solar-driven H 2 O 2 synthesis.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Wei Li,Siyuan Cao,Xu Yin,Qi Zhang,Liankai Gu,Hongwei Zhu,Kajia Wei,Weiqing Han
Seeking efficient and facile methods for precise oxygen vacancy (Ov)-content regulation is challenging for practical application. Herein, we propose a confinement-based Ov optimization strategy, and construct Fe 3 O 4 with controllable Ov confined in S-doped mesoporous carbon (Fe 3 O 4 @SMC) catalyst to enhance nonradical oxidation of PMS. The confinement effect induced the O 2p orbitals p-band-center shift in Fe 3 O 4 @SMC, which promoted Ov formation, thus achieving 100 % BPA degradation within 9 min via an electron-transfer process (ETP) dominated nonradical pathway with a 125.8-fold higher k obs value than unconfinement catalyst. Ov content variation under confinement, triggered by tuning confined support defect level, steered nonradical transition from single-electron-activated singlet oxygen route to two-electron-transferred ETP pathway, which improved selectivity (> 95 % of electron-rich pollutants removal), adaptability and durability (10 h continuous-flow operation) of catalyst. This work paves the way for modulating Ov in iron-oxides via confinement engineering and offers new insights into the Ov-induced mechanism in confined environments.
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