CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Qingchun Jiang,Yujie Ren,Yujie Yang,Honghao Liu,Ling Wang,Jin Li,Lei Dai,Zhangxing He
High energy efficiency and cycle stability have always been the focus of research on vanadium redox flow battery (VRFB). It is noted that metal–organic framework (MOF) has many advantages due to porosity, controllable structure, and functional modification. Therefore, in this paper, a composite electrode with Fe, N, S co-doped carbon nanofibers in situ supported on graphite felt surface (GF@Fe-N/S-CNFs) was prepared by using bimetal-organic framework as precursor. GF@Fe-N/S-CNFs possess large specific surface area, abundant active centers, and high electrical conductivity, which exhibits excellent electrocatalytic activity for both VO 2+ /VO 2 + and V 2+ /V 3+ redox reactions. At 200 mA cm −2 , energy efficiency and voltage efficiency of the modified battery using GF@Fe-N/S-CNFs are 71.7 % and 75.8 %, respectively, which are 9.7 % and 10.6 % higher than those of blank battery. Modified battery can still run smoothly at high current density of 300 mA cm −2 . In addition, energy efficiency holds excellent steady during 350 charge–discharge cycles at 150 mA cm −2 . Hence, this work brings a promising vision of MOF derivant for high-performance electrode of VRFB.
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FOOD CHEMISTRY
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2023
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IF 8.8
Wei Jia,Xin Wang
Endogenous aflatoxin B1 (AFB1) was quantified in five hundred and forty Hengshan goat meat samples (0.00 ± 23.09 μg kg −1 ). Zanthoxylum bungeanum ( Z. bungeanum ), as a natural pickling spice, can ameliorate the flavor of animal-derived food (goat meat). Yet, considering the direct administration of Z. bungeanum in AFB1-contaminated goat meat, the degradation mechanisms of AFB1 remain elusive. Here, UHPLC-Q-Orbitrap HRMS-based integrative metabolomics (LOQ: 1.74–59.54 μg kg −1 ) and proteomics analyses were executed to determine the effects of Z. bungeanum in the biotransformation of AFB1. Z. bungeanum (1.50 %, w/w ) application mediated the metabolism of xenobiotics by cytochrome P450, significantly down-regulated cytochrome P450 1A and stimulated the up-regulation of glutathione S-transferase levels in AFB1-contaminated goat meat, leading to degradation of AFB1 (20.00–3.39 μg kg −1 ). Metabolomics assays indicated that Z. bungeanum up-regulated l -histidine (1.43–2.21 mg kg −1 ) and l -arginine, manifesting potential applications for the contribution of Z. bungeanum to the nutritional value of goat meat.
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高影响因子
MOLECULAR PHARMACEUTICS
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2023
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IF 4.9
Qinming Xu,Xing Li,Jingang Yang,Yan Zhang,Xiaocui Deng,Gang Li,Qingmei Yuan
Four peptide amphiphiles (PA1-4) with different degrees of polymerization (DP = 40, 15, 10, and 6) were synthesized by Fuchs-Farthing and ring-opening polymerization followed by post-polymerization modification, as fully characterized by 1H NMR, FT-IR, gel permeation chromatography, and circular dichroism (CD) spectroscopy. It was found that PAs could self-assemble to form regular spherical micelles in low-concentration (about 1 mg/mL) aqueous solution, which had different contents of secondary structures and mainly adopted random coil conformations. The water solubility of PAs increases with the increase of DP, the polypeptide chain stretches randomly in water, the β-sheets decrease, and the random coil conformations dominate. When the pH of PA solution decreases or increases, intramolecular hydrogen bonds break, and molecular chains stretch, leading to a decrease of α-helix, turn conformations, and an increase of β-sheets. Meanwhile, the particle size of micelles increases. At around 0.4 mg/mL, the hemolysis ability of PA2 is negligible at pH 7.4 and 6.5 and about 33% at pH 5.5. Cisplatin (CDDP) was linked to micelles by coordination bonds to explore their potential as drug carriers, exhibiting controlled pH and reduction in dual drug release effects. MTT assay showed that the HeLa cell viability was 78% when cultured in the 13.5 μg/mL PA2 blank micelles for 2 days, while the cell viability was 60% in the CDDP-loaded micelles. Furthermore, a high concentration of PA2 (about 100 mg/mL) could self-assemble into a fibrous hydrogel at pH 5.5, which self-healed 2 h after incision and self-degraded 71% within 14 days. The CDDP-loaded fiber hydrogel exhibited a sustained release effect similar to the CDDP-loaded micelles. The cytotoxicity of CDDP-loaded fibers at 48 h was detected to be the same as that of the same amount of CDDP, and the cell viability was 7%. Therefore, we provide a new strategy for the synthesis of amphiphilic peptides with potential applications in nano-drug carriers and cancer therapy.
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JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Yunji Xie,Su Li,Jinhui Pang,Zhenhua Jiang
The piperidinium cation exhibited a substantial impact on the improvement of alkaline stability of anion exchange membranes (AEMs), yet the research regarding the micro-block polymer AEMs modified with it has not been conducted. Herein, we report two series of micro-block poly(arylene ether sulfone)s containing densely benzyl- N -methylpiperidinium (TTP- n -PIPPES) and benzyl-trimethyl-ammonium (TTP- n -QAPES) functionalized units for AMEs, respectively, where the n represents the molar ratio of monomer containing tri-tetraphenyl to the employed bisphenol monomers. The content and arrangement of the two types of cations in both polymer backbones were the same. The hydrophilic phases of TTP- n -PIPPES membranes exhibited isolated island states, wrapped with coherent hydrophobic phases. While the TTP- n -QAPES membranes formed continuous hydrophilic channels but fragmented hydrophobic phases. The discrepancy in the microscopic morphology of membranes and the intrinsic nature of cations thus rendered two types of AEMs with different advantages in macroscopic properties. The TTP- n -PIPPES membranes performed better dimensional stability and alkaline stability (low temperature). In contrast, the preferable capabilities of TTP- n -QAPES membranes were water affinity, hydroxide conductivity, and alkaline stability (high temperature). For instance, the TTP-18.2-PIPPES membrane was 11.7%, 11.4%, and 27.4% lower than the TTP-18.2-QAPES membrane at 80 °C in terms of dimensional change, water uptake, and hydroxide conductivity, respectively.
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Solar RRL
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2023
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IF 7.9
Zihao Wang,Chengwu Shi,Rui Cao,Kai Lv,Changsheng Ye,Wangchao Chen,Guiju Hu,Fuling Guo,Yanqing Wang
Herein, Na 2 SSeO 3 solutions are prepared by hydrothermal method at 140 °C for 8 h using Se powder and Na 2 SO 3 solution (the molar ratios of Se:Na 2 SO 3 = 1:4, 1:5, 1:6) and the chemical composition of Na 2 SSeO 3 solutions is analyzed by X-ray photoelectron spectroscopy. Sb 2 S y Se 3− y thin films are prepared by chemical bath deposition (CBD) at 90 °C for 5 h and subsequently annealed at 375 °C for 10 min and etched by N -butyldithiocarbamic acid solution in DMF. The effect of the Na 2 SSeO 3 solution, growth solution volume, etching on the thickness and chemical composition of Sb 2 S y Se 3− y thin films, and the power conversion efficiency (PCE) of the corresponding solar cells is systematically investigated. The result reveals that the Na 2 SSeO 3 solutions may be the mixing solutions containing Na 2 SSeO 3 , Na 2 S 2 SeO 6 , Na 2 S 2 Se 2 O 6 , Na 2 Se. When the molar ratio of Se:Na 2 SO 3 and growth solution volume is 1:5 and 56 mL and the Sb 2 S y Se 3− y thin films with annealing are etched, the PCE of Sb 2 S y Se 3− y solar cells is 8.00% with spiro-OMeTAD and 8.43% with spiro-OMeTAD:TMT-TTF. The PCE of 8.43% is the highest value for Sb 2 S y Se 3− y solar cells using CBD and demonstrates that the composition engineering is an important strategy for improving the PCE of Sb 2 S y Se 3− y solar cells using CBD.
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POLYMER
·
2023
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IF 4.6
Jingjing Hou,Lu Han,Shuzheng Sun,Mingkai Li,Junbo Yue,Yanqin Yang,Jingde Li
The commercialization of lithium-sulfur (Li-S) batteries has been restrained mainly by lithium polysulfides (LiPSs) shuttling and sluggish electrochemical reactions . Herein, a functional separator with synergy effect between adsorption and catalysis is proposed to solve the above problems. Specifically, an ultrathin barrier layer of a functionalized intrinsic microporous polymer (Li-AOPIM-1) is coated on SWCNT gutter layer through spin coating and applied to modify the cathode side of commercial polypropylene (PP) separator. In this configuration, the robust SWCNT gutter layer with high conductivity can not only work as a physical barrier to block the macropores of PP separator, but also improve the integral conductivity, resulting in a rapid charge migration and reaction kinetics. The electronegative heteroatoms N and O in Li-AOPIM-1 top layer have strong adsorption capability to LiPSs so that modified separator can restrain the shuttle effect admirably. Moreover, the introduction of lithiated sites further enhance the lithium-ion conductivity. Accordingly, the Li-S batteries implementing this modified separator deliver stable lifespan with only 0.062% capacity fading rate per cycle after 500 cycles at 1 C and superior rate performance of 700.6 mAh g −1 at 3 C. This work will provide a feasible strategy for the practical applications of high-performance Li-S batteries.
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ACS Applied Energy Materials
·
2023
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IF 6.4
Lele Lu,Qiang Li,Runhao Zhang,Jialong Jiang,Shiqi Zhang,Jiachen Guo,Peng Cheng,Wei Shi
Transition-metal phosphides (TMPs) are regarded as ideal HER electrocatalysts owing to their rich reserve, flexible composition, competitive activity, and excellent stability. Yet, TMPs still suffer from poor electrical conductivity and agglomeration under a high synthetic temperature of the solid-state reaction. Benefiting from the monodisperse metal sites with organic matrix surrounded, metal–organic frameworks (MOFs) have great potential as a feedstock to produce MOF-derived TMPs with tailored microenvironments of the active sites. Herein, a series of nanostructured Ni2P@SNC were facilely fabricated by a one-step phosphorization of a well-designed Ni-MOF with red phosphorus as a “P” source. The optimal Ni2P@SNC-800 displayed an overpotential of 80 mV in 1.0 M KOH and 97 mV in 0.5 M H2SO4 at 10 mA cm–2, demonstrating excellent HER performance as well as long durability in both electrolytes. The comprehensive performance of Ni2P@SNC-800 surpasses that of other heteroatom-free MOF-derived Ni2P significantly. This work provides a facile approach for the design and synthesis of MOF-derived TMPs coated with a heteroatom-doped carbon matrix as an electrocatalyst with high activity.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 35
·19091-19106
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IF 11.9
Xiaoyun Chen,Pengkun Zhang,Dong-Hau Kuo,Qinhan Wu,Adugna Boke Abdeta,Binghong Wu,Zhengjie Su,Longyan Chen,Osman Ahmed Zelekew,Jinguo Lin
Herein, we demonstrated S2− anion incorporation into BiVO4 for converting an oxidative-type BiVO4 photocatalyst into a reductive-type BiV(S,O)4−x (labeled BiVOS) sulfo-oxide photocatalyst for efficient N2 fixation under an ambient environment. BiVOS-2 not only exhibited the highest NH3 production rate of 563.6 μmol g−1 h−1 without sacrificial agents and with durable stability but also had an apparent quantum efficiency (AQE) of 2.18% at 420 nm and a solar-to-ammonia (STA) conversion efficiency of 0.071% in pure water under AM1.5G light irradiation. At the same time, the sulfur-free BiVO4 can't realize N2 to NH3 conversion. The S2− doping introduced Vo, which converted V5+ around Vo into V4+ to keep the electrical neutrality. The active atoms V4+ were exposed and activated N2, and the electron hopping between V5+ and V4+ improved electron transfer. Density functional theory (DFT) calculation indicates that S2− anion doping can enhance adsorption energy, elongate the NN bond of the adsorbed N2 molecule, and facilitate electron transfer to the antibonding orbital of the N2 molecule, leading the BiVOS sulfo-oxide catalyst to have excellent N2 fixation activity. This study provides a promising method for converting an oxidative-type catalyst into a reductive catalyst to extend material applications.
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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2023
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IF 3.4
Yang Chang,Yafei Xia,Xiaojun Liu,Putian Yu,Furong Fan,Yangyang Shi,Shixin Yan,Shu Yan
Background Cholestasis is a commonly occurring disorder induced by impaired bile flow, for which there is no effective treatment so far. Qingre Lidan decoction (QRLD) is a clinically used herbal compound for the long-term treatment of bile circulation disorders arising from inflammation and obstruction in the gallbladder and bile ducts. The objective of this study was to investigate the protective effect of QRLD on cholestatic liver injury and its possible mechanism. Methods α-Naphthyl isothiocyanate (ANIT) was used to induce cholestatic liver injury in rats. Liver histopathology and serum biochemical markers were used to assess QRLD's protective impact. The possible biomarkers and mechanism of the therapeutic benefits of QRLD were investigated using a UHPLC-based Q-Exactive Orbitrap MS / MS untargeted serum metabolomics technique together with 16 S rRNA microbiota profiling. Afterwards, using RT-qPCR as well as Western Blot techniques, the expression of pertinent indicators was determined. Results The intervention effect of QRLD was stronger at medium and high dosages than at low doses, and it dramatically decreased the levels of serum biochemical markers in cholestatic rats reflecting alterations in liver function and relieving ANIT-induced abnormalities in the liver's histopathology. Serum metabolomics showed that QRLD could affect the metabolic profile of cholestatic rats, mainly related to glycerophospholipid metabolism, taurine and hypotaurine metabolism, alanine, aspartate and glutamate metabolism, and histidine metabolic pathway. Additionally, analysis of 16 S rRNA gene sequencing indicated that QRLD could moderate ANIT-induced microbiota disorders, particularly Romboutsia, Bifidobacterium, Fusicatenibacter, Prevotella_9, Prevotellaceae_NK3B31_group and Prevotella_1. Other experimental results showed that QRLD significantly upregulated the mRNA and protein expression of PPARα, CYP7A1 and NTCP in the liver, inhibited the expression of p-IκBα, p-p65 and TNFα while increasing the anti-inflammatory factor IL-10, and downregulated the expression of MDA (a peroxidation product) and D -lactic acid (an intestinal barrier indicator) while increasing the expression of SOD and GSH. Conclusions QRLD can effectively regulate endogenous metabolites and microbiota disorders in cholestatic rats that are correlated with the attenuation of inflammation and oxidative stress.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Heming Huang,Yangjun Luo,Li Zhang,Huijuan Zhang,Yu Wang
Transition metal catalysts for replacing noble metals have been extensively studied, but the deficiencies in intrinsic activity and stability limit their application in electrocatalysis . Here, we present CoNi alloy nanoparticles loaded on Ti 4 O 7 supports and embedded in N, S doped carbon nanofibers by electrospinning method. The prepared CoNi/Ti 4 O 7 @NS-CNFs exhibits satisfactory ORR and OER activities with a low potential gap of 0.664 V and shows a high stability over long periods of testing, which are superior to most of the transition metal catalysts reported so far. Accordingly, the Zn-air battery constructed with the prepared catalyst demonstrates a maximum power density of 165.7 mW cm −2 and a specific capacity of 788.4 mA h g Z n - 1 (1.61 and 1.14 times higher than that of Pt/C + IrO 2 , respectively). The addition of S element and corrosion-resistant Ti 4 O 7 plays a significant part in the morphology and activity of the prepared catalyst, which optimizes the distribution and electronic structure of active centers, and improves the stability of the catalyst. This effort provides a possible approach to exploring the efficient performance of the other transition metals.
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Materials Advances
·
2022
·Vol. 3
·期 20
·7546-7558
·
IF 0
Hecheng Ma,Jianjun Liu,Yimeng Wang,Shengli Zuo,Yingchun Yu,Baoshan Li
Photocatalytic degradation has been developed as a promising strategy for environmental remediation. Black phosphorus (BP) has attracted much attention in the field of photocatalysis due to the adjustable bandgap and high carrier mobility. In this work, we constructed a flower-like BP nanosheet/P-doped BiOCl (BP/P-BiOCl) S-scheme heterostructure via a simple co-precipitation method. The physicochemical properties such as the crystallinity, morphology, chemical environment, and optical and electronic properties of the as-fabricated materials were analyzed by using different analytical techniques. SEM data indicated the successful formation of a flower-like structure of BP/P-BiOCl composites. X-Ray photoelectron spectroscopy data indicated the formation of P-doped BiOCl. X-Ray diffraction and high resolution-TEM data revealed the formation of a hierarchical BP/P-BiOCl heterostructure. The catalytic activity of the as-synthesized samples (15%-BP/P-BiOCl) was tested towards RhB degradation (96% of 20 ppm RhB solution) and Cr(VI) reduction (90% of 20 ppm Cr(VI) solution) under solar light illumination. We demonstrated the formation mechanism of a flower-like structure in which positively charged BPNs assembled with negatively charged P-BiOCl by electrostatic attraction. Furthermore, we revealed the S-scheme photocatalytic mechanism to prove the enhanced photocatalytic activity of BP/P-BiOCl composites. The photodegradation of phenol, radical species trapping experiments and charge transfer route test were performed to prove the formation of the S-scheme. This work provides a facile route for the construction of a flower-like S-scheme heterostructure photocatalyst for efficient solar light photocatalytic performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Jian Wang,Changchun Chen,Zhihao Zhao,Cheng Cheng,Zhonghai Tang,Zhou Du,Yifeng Wang,Lin Pan
Considerable attentions are currently paid to water pollution, which seriously threats human health. Semiconductor catalysts with step-like (S-scheme) heterojunction are often used for degrading organic pollutants in water bodies due to their high carrier separation efficiency, high redox capacity, and broad light absorption capacity. In this paper, a novel S-scheme N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) heterojunction composite is synthesized for photodegradation of organic pollutants. The structural measurements indicate that the NH 2 -MIL-125(Ti) nanoparticles are intimately anchored on the surface of porous N-doped g-C 3 N 4 nanosheets . The experimental characterizations as well as the DFT theoretical calculation for samples demonstrate that the N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) composites not only bear larger specific surface area providing abundant reactive sites, but also improve the separation efficiency of photogenerated carriers during photodegradation. In addition, the degradation rate of RhB solution catalyzed by 25 wt% N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) (25 wt% NCM) attains the highest degradation rate (96.4%) under visible light irradiation. Moreover, the mineralization of RhB solution and intermediates produced in the degradation process are analyzed by total organic carbon (TOC) and high- performance liquid chromatography (HPLC) tests, respectively. Electron paramagnetic resonance (EPR) with free radical capture measurements show that the photodegradation of RhB is mainly ascribed to the superoxide radicals (·O 2 - ) and hole (h + ). This study provides an effective method to construct S-scheme heterojunction photocatalysts and apply them to wastewater treatment.
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